fishHEADmaster

73 files changed, 48442 insertions, 0 deletions

diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
new file mode 100644
index 0000000..c8c916f
--- /dev/null
+++ b/net/mac80211/Kconfig
@@ -0,0 +1,294 @@
+config MAC80211
+	tristate "Generic IEEE 802.11 Networking Stack (mac80211)"
+	depends on m
+	depends on CFG80211
+	depends on CRYPTO
+	depends on CRYPTO_ARC4
+	depends on CRYPTO_AES
+	depends on CRC32
+	select BACKPORT_AVERAGE
+	---help---
+	  This option enables the hardware independent IEEE 802.11
+	  networking stack.
+
+comment "CFG80211 needs to be enabled for MAC80211"
+	depends on CFG80211=n
+
+if MAC80211 != n
+
+config MAC80211_HAS_RC
+	bool
+
+config MAC80211_RC_PID
+	bool "PID controller based rate control algorithm" if EXPERT
+	select MAC80211_HAS_RC
+	---help---
+	  This option enables a TX rate control algorithm for
+	  mac80211 that uses a PID controller to select the TX
+	  rate.
+
+config MAC80211_RC_MINSTREL
+	bool "Minstrel" if EXPERT
+	select MAC80211_HAS_RC
+	default y
+	---help---
+	  This option enables the 'minstrel' TX rate control algorithm
+
+config MAC80211_RC_MINSTREL_HT
+	bool "Minstrel 802.11n support" if EXPERT
+	depends on MAC80211_RC_MINSTREL
+	default y
+	---help---
+	  This option enables the 'minstrel_ht' TX rate control algorithm
+
+choice
+	prompt "Default rate control algorithm"
+	depends on MAC80211_HAS_RC
+	default MAC80211_RC_DEFAULT_MINSTREL
+	---help---
+	  This option selects the default rate control algorithm
+	  mac80211 will use. Note that this default can still be
+	  overridden through the ieee80211_default_rc_algo module
+	  parameter if different algorithms are available.
+
+config MAC80211_RC_DEFAULT_PID
+	bool "PID controller based rate control algorithm"
+	depends on MAC80211_RC_PID
+	---help---
+	  Select the PID controller based rate control as the
+	  default rate control algorithm. You should choose
+	  this unless you know what you are doing.
+
+config MAC80211_RC_DEFAULT_MINSTREL
+	bool "Minstrel"
+	depends on MAC80211_RC_MINSTREL
+	---help---
+	  Select Minstrel as the default rate control algorithm.
+
+
+endchoice
+
+config MAC80211_RC_DEFAULT
+	string
+	default "minstrel_ht" if MAC80211_RC_DEFAULT_MINSTREL && MAC80211_RC_MINSTREL_HT
+	default "minstrel" if MAC80211_RC_DEFAULT_MINSTREL
+	default "pid" if MAC80211_RC_DEFAULT_PID
+	default ""
+
+endif
+
+comment "Some wireless drivers require a rate control algorithm"
+	depends on MAC80211 && MAC80211_HAS_RC=n
+
+config MAC80211_MESH
+	bool "Enable mac80211 mesh networking (pre-802.11s) support"
+	depends on MAC80211
+	---help---
+	 This options enables support of Draft 802.11s mesh networking.
+	 The implementation is based on Draft 2.08 of the Mesh Networking
+	 amendment.  However, no compliance with that draft is claimed or even
+	 possible, as drafts leave a number of identifiers to be defined after
+	 ratification.  For more information visit http://o11s.org/.
+
+config MAC80211_LEDS
+	bool "Enable LED triggers"
+	depends on MAC80211
+	depends on LEDS_CLASS
+	select BACKPORT_LEDS_TRIGGERS
+	---help---
+	  This option enables a few LED triggers for different
+	  packet receive/transmit events.
+
+config MAC80211_DEBUGFS
+	bool "Export mac80211 internals in DebugFS"
+	depends on MAC80211 && DEBUG_FS
+	---help---
+	  Select this to see extensive information about
+	  the internal state of mac80211 in debugfs.
+
+	  Say N unless you know you need this.
+
+config MAC80211_MESSAGE_TRACING
+	bool "Trace all mac80211 debug messages"
+	depends on MAC80211
+	---help---
+	  Select this option to have mac80211 register the
+	  mac80211_msg trace subsystem with tracepoints to
+	  collect all debugging messages, independent of
+	  printing them into the kernel log.
+
+	  The overhead in this option is that all the messages
+	  need to be present in the binary and formatted at
+	  runtime for tracing.
+
+menuconfig MAC80211_DEBUG_MENU
+	bool "Select mac80211 debugging features"
+	depends on MAC80211
+	---help---
+	  This option collects various mac80211 debug settings.
+
+config MAC80211_NOINLINE
+	bool "Do not inline TX/RX handlers"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  This option affects code generation in mac80211, when
+	  selected some functions are marked "noinline" to allow
+	  easier debugging of problems in the transmit and receive
+	  paths.
+
+	  This option increases code size a bit and inserts a lot
+	  of function calls in the code, but is otherwise safe to
+	  enable.
+
+	  If unsure, say N unless you expect to be finding problems
+	  in mac80211.
+
+config MAC80211_VERBOSE_DEBUG
+	bool "Verbose debugging output"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  Selecting this option causes mac80211 to print out
+	  many debugging messages. It should not be selected
+	  on production systems as some of the messages are
+	  remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_MLME_DEBUG
+	bool "Verbose managed MLME output"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  Selecting this option causes mac80211 to print out
+	  debugging messages for the managed-mode MLME. It
+	  should not be selected on production systems as some
+	  of the messages are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_STA_DEBUG
+	bool "Verbose station debugging"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  Selecting this option causes mac80211 to print out
+	  debugging messages for station addition/removal.
+
+	  Do not select this option.
+
+config MAC80211_HT_DEBUG
+	bool "Verbose HT debugging"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  This option enables 802.11n High Throughput features
+	  debug tracing output.
+
+	  It should not be selected on production systems as some
+	  of the messages are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_IBSS_DEBUG
+	bool "Verbose IBSS debugging"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  Selecting this option causes mac80211 to print out
+	  very verbose IBSS debugging messages. It should not
+	  be selected on production systems as those messages
+	  are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_PS_DEBUG
+	bool "Verbose powersave mode debugging"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  Selecting this option causes mac80211 to print out very
+	  verbose power save mode debugging messages (when mac80211
+	  is an AP and has power saving stations.)
+	  It should not be selected on production systems as those
+	  messages are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_MPL_DEBUG
+	bool "Verbose mesh peer link debugging"
+	depends on MAC80211_DEBUG_MENU
+	depends on MAC80211_MESH
+	---help---
+	  Selecting this option causes mac80211 to print out very
+	  verbose mesh peer link debugging messages (when mac80211
+	  is taking part in a mesh network).
+	  It should not be selected on production systems as those
+	  messages are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_MPATH_DEBUG
+	bool "Verbose mesh path debugging"
+	depends on MAC80211_DEBUG_MENU
+	depends on MAC80211_MESH
+	---help---
+	  Selecting this option causes mac80211 to print out very
+	  verbose mesh path selection debugging messages (when mac80211
+	  is taking part in a mesh network).
+	  It should not be selected on production systems as those
+	  messages are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_MHWMP_DEBUG
+	bool "Verbose mesh HWMP routing debugging"
+	depends on MAC80211_DEBUG_MENU
+	depends on MAC80211_MESH
+	---help---
+	  Selecting this option causes mac80211 to print out very
+	  verbose mesh routing (HWMP) debugging messages (when mac80211
+	  is taking part in a mesh network).
+	  It should not be selected on production systems as those
+	  messages are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_MESH_SYNC_DEBUG
+	bool "Verbose mesh synchronization debugging"
+	depends on MAC80211_DEBUG_MENU
+	depends on MAC80211_MESH
+	---help---
+	  Selecting this option causes mac80211 to print out very verbose mesh
+	  synchronization debugging messages (when mac80211 is taking part in a
+	  mesh network).
+
+	  Do not select this option.
+
+config MAC80211_MESH_PS_DEBUG
+	bool "Verbose mesh powersave debugging"
+	depends on MAC80211_DEBUG_MENU
+	depends on MAC80211_MESH
+	---help---
+	  Selecting this option causes mac80211 to print out very verbose mesh
+	  powersave debugging messages (when mac80211 is taking part in a
+	  mesh network).
+
+	  Do not select this option.
+
+config MAC80211_TDLS_DEBUG
+	bool "Verbose TDLS debugging"
+	depends on MAC80211_DEBUG_MENU
+	---help---
+	  Selecting this option causes mac80211 to print out very
+	  verbose TDLS selection debugging messages (when mac80211
+	  is a TDLS STA).
+	  It should not be selected on production systems as those
+	  messages are remotely triggerable.
+
+	  Do not select this option.
+
+config MAC80211_DEBUG_COUNTERS
+	bool "Extra statistics for TX/RX debugging"
+	depends on MAC80211_DEBUG_MENU
+	depends on MAC80211_DEBUGFS
+	---help---
+	  Selecting this option causes mac80211 to keep additional
+	  and very verbose statistics about TX and RX handler use
+	  and show them in debugfs.
+
+	  If unsure, say N.
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
new file mode 100644
index 0000000..c09a5ee
--- /dev/null
+++ b/net/mac80211/Makefile
@@ -0,0 +1,63 @@
+obj-$(CPTCFG_MAC80211) += mac80211.o
+
+# mac80211 objects
+mac80211-y := \
+	main.o status.o \
+	sta_info.o \
+	wep.o \
+	wpa.o \
+	scan.o offchannel.o \
+	ht.o agg-tx.o agg-rx.o \
+	vht.o \
+	ibss.o \
+	iface.o \
+	rate.o \
+	michael.o \
+	tkip.o \
+	aes_ccm.o \
+	aes_cmac.o \
+	cfg.o \
+	rx.o \
+	spectmgmt.o \
+	tx.o \
+	key.o \
+	util.o \
+	wme.o \
+	event.o \
+	chan.o \
+	trace.o mlme.o
+
+mac80211-$(CPTCFG_MAC80211_LEDS) += led.o
+mac80211-$(CPTCFG_MAC80211_DEBUGFS) += \
+	debugfs.o \
+	debugfs_sta.o \
+	debugfs_netdev.o \
+	debugfs_key.o
+
+mac80211-$(CPTCFG_MAC80211_MESH) += \
+	mesh.o \
+	mesh_pathtbl.o \
+	mesh_plink.o \
+	mesh_hwmp.o \
+	mesh_sync.o \
+	mesh_ps.o
+
+mac80211-$(CONFIG_PM) += pm.o
+
+CFLAGS_trace.o := -I$(src)
+
+# objects for PID algorithm
+rc80211_pid-y := rc80211_pid_algo.o
+rc80211_pid-$(CPTCFG_MAC80211_DEBUGFS) += rc80211_pid_debugfs.o
+
+rc80211_minstrel-y := rc80211_minstrel.o
+rc80211_minstrel-$(CPTCFG_MAC80211_DEBUGFS) += rc80211_minstrel_debugfs.o
+
+rc80211_minstrel_ht-y := rc80211_minstrel_ht.o
+rc80211_minstrel_ht-$(CPTCFG_MAC80211_DEBUGFS) += rc80211_minstrel_ht_debugfs.o
+
+mac80211-$(CPTCFG_MAC80211_RC_PID) += $(rc80211_pid-y)
+mac80211-$(CPTCFG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
+mac80211-$(CPTCFG_MAC80211_RC_MINSTREL_HT) += $(rc80211_minstrel_ht-y)
+
+ccflags-y += -D__CHECK_ENDIAN__ -DDEBUG
diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
new file mode 100644
index 0000000..0785e95
--- /dev/null
+++ b/net/mac80211/aes_ccm.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2003-2004, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <crypto/aes.h>
+
+#include <net/mac80211.h>
+#include "key.h"
+#include "aes_ccm.h"
+
+static void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *scratch, u8 *a)
+{
+	int i;
+	u8 *b_0, *aad, *b, *s_0;
+
+	b_0 = scratch + 3 * AES_BLOCK_SIZE;
+	aad = scratch + 4 * AES_BLOCK_SIZE;
+	b = scratch;
+	s_0 = scratch + AES_BLOCK_SIZE;
+
+	crypto_cipher_encrypt_one(tfm, b, b_0);
+
+	/* Extra Authenticate-only data (always two AES blocks) */
+	for (i = 0; i < AES_BLOCK_SIZE; i++)
+		aad[i] ^= b[i];
+	crypto_cipher_encrypt_one(tfm, b, aad);
+
+	aad += AES_BLOCK_SIZE;
+
+	for (i = 0; i < AES_BLOCK_SIZE; i++)
+		aad[i] ^= b[i];
+	crypto_cipher_encrypt_one(tfm, a, aad);
+
+	/* Mask out bits from auth-only-b_0 */
+	b_0[0] &= 0x07;
+
+	/* S_0 is used to encrypt T (= MIC) */
+	b_0[14] = 0;
+	b_0[15] = 0;
+	crypto_cipher_encrypt_one(tfm, s_0, b_0);
+}
+
+
+void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
+			       u8 *data, size_t data_len,
+			       u8 *cdata, u8 *mic)
+{
+	int i, j, last_len, num_blocks;
+	u8 *pos, *cpos, *b, *s_0, *e, *b_0;
+
+	b = scratch;
+	s_0 = scratch + AES_BLOCK_SIZE;
+	e = scratch + 2 * AES_BLOCK_SIZE;
+	b_0 = scratch + 3 * AES_BLOCK_SIZE;
+
+	num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
+	last_len = data_len % AES_BLOCK_SIZE;
+	aes_ccm_prepare(tfm, scratch, b);
+
+	/* Process payload blocks */
+	pos = data;
+	cpos = cdata;
+	for (j = 1; j <= num_blocks; j++) {
+		int blen = (j == num_blocks && last_len) ?
+			last_len : AES_BLOCK_SIZE;
+
+		/* Authentication followed by encryption */
+		for (i = 0; i < blen; i++)
+			b[i] ^= pos[i];
+		crypto_cipher_encrypt_one(tfm, b, b);
+
+		b_0[14] = (j >> 8) & 0xff;
+		b_0[15] = j & 0xff;
+		crypto_cipher_encrypt_one(tfm, e, b_0);
+		for (i = 0; i < blen; i++)
+			*cpos++ = *pos++ ^ e[i];
+	}
+
+	for (i = 0; i < CCMP_MIC_LEN; i++)
+		mic[i] = b[i] ^ s_0[i];
+}
+
+
+int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch,
+			      u8 *cdata, size_t data_len, u8 *mic, u8 *data)
+{
+	int i, j, last_len, num_blocks;
+	u8 *pos, *cpos, *b, *s_0, *a, *b_0;
+
+	b = scratch;
+	s_0 = scratch + AES_BLOCK_SIZE;
+	a = scratch + 2 * AES_BLOCK_SIZE;
+	b_0 = scratch + 3 * AES_BLOCK_SIZE;
+
+	num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
+	last_len = data_len % AES_BLOCK_SIZE;
+	aes_ccm_prepare(tfm, scratch, a);
+
+	/* Process payload blocks */
+	cpos = cdata;
+	pos = data;
+	for (j = 1; j <= num_blocks; j++) {
+		int blen = (j == num_blocks && last_len) ?
+			last_len : AES_BLOCK_SIZE;
+
+		/* Decryption followed by authentication */
+		b_0[14] = (j >> 8) & 0xff;
+		b_0[15] = j & 0xff;
+		crypto_cipher_encrypt_one(tfm, b, b_0);
+		for (i = 0; i < blen; i++) {
+			*pos = *cpos++ ^ b[i];
+			a[i] ^= *pos++;
+		}
+		crypto_cipher_encrypt_one(tfm, a, a);
+	}
+
+	for (i = 0; i < CCMP_MIC_LEN; i++) {
+		if ((mic[i] ^ s_0[i]) != a[i])
+			return -1;
+	}
+
+	return 0;
+}
+
+
+struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[])
+{
+	struct crypto_cipher *tfm;
+
+	tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
+	if (!IS_ERR(tfm))
+		crypto_cipher_setkey(tfm, key, ALG_CCMP_KEY_LEN);
+
+	return tfm;
+}
+
+
+void ieee80211_aes_key_free(struct crypto_cipher *tfm)
+{
+	crypto_free_cipher(tfm);
+}
diff --git a/net/mac80211/aes_ccm.h b/net/mac80211/aes_ccm.h
new file mode 100644
index 0000000..5b7d744
--- /dev/null
+++ b/net/mac80211/aes_ccm.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2003-2004, Instant802 Networks, Inc.
+ * Copyright 2006, Devicescape Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef AES_CCM_H
+#define AES_CCM_H
+
+#include <linux/crypto.h>
+
+struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[]);
+void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch,
+			       u8 *data, size_t data_len,
+			       u8 *cdata, u8 *mic);
+int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch,
+			      u8 *cdata, size_t data_len,
+			      u8 *mic, u8 *data);
+void ieee80211_aes_key_free(struct crypto_cipher *tfm);
+
+#endif /* AES_CCM_H */
diff --git a/net/mac80211/aes_cmac.c b/net/mac80211/aes_cmac.c
new file mode 100644
index 0000000..537488c
--- /dev/null
+++ b/net/mac80211/aes_cmac.c
@@ -0,0 +1,146 @@
+/*
+ * AES-128-CMAC with TLen 16 for IEEE 802.11w BIP
+ * Copyright 2008, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/export.h>
+#include <linux/err.h>
+#include <crypto/aes.h>
+
+#include <net/mac80211.h>
+#include "key.h"
+#include "aes_cmac.h"
+
+#define AES_CMAC_KEY_LEN 16
+#define CMAC_TLEN 8 /* CMAC TLen = 64 bits (8 octets) */
+#define AAD_LEN 20
+
+
+static void gf_mulx(u8 *pad)
+{
+	int i, carry;
+
+	carry = pad[0] & 0x80;
+	for (i = 0; i < AES_BLOCK_SIZE - 1; i++)
+		pad[i] = (pad[i] << 1) | (pad[i + 1] >> 7);
+	pad[AES_BLOCK_SIZE - 1] <<= 1;
+	if (carry)
+		pad[AES_BLOCK_SIZE - 1] ^= 0x87;
+}
+
+
+static void aes_128_cmac_vector(struct crypto_cipher *tfm, size_t num_elem,
+				const u8 *addr[], const size_t *len, u8 *mac)
+{
+	u8 cbc[AES_BLOCK_SIZE], pad[AES_BLOCK_SIZE];
+	const u8 *pos, *end;
+	size_t i, e, left, total_len;
+
+	memset(cbc, 0, AES_BLOCK_SIZE);
+
+	total_len = 0;
+	for (e = 0; e < num_elem; e++)
+		total_len += len[e];
+	left = total_len;
+
+	e = 0;
+	pos = addr[0];
+	end = pos + len[0];
+
+	while (left >= AES_BLOCK_SIZE) {
+		for (i = 0; i < AES_BLOCK_SIZE; i++) {
+			cbc[i] ^= *pos++;
+			if (pos >= end) {
+				e++;
+				pos = addr[e];
+				end = pos + len[e];
+			}
+		}
+		if (left > AES_BLOCK_SIZE)
+			crypto_cipher_encrypt_one(tfm, cbc, cbc);
+		left -= AES_BLOCK_SIZE;
+	}
+
+	memset(pad, 0, AES_BLOCK_SIZE);
+	crypto_cipher_encrypt_one(tfm, pad, pad);
+	gf_mulx(pad);
+
+	if (left || total_len == 0) {
+		for (i = 0; i < left; i++) {
+			cbc[i] ^= *pos++;
+			if (pos >= end) {
+				e++;
+				pos = addr[e];
+				end = pos + len[e];
+			}
+		}
+		cbc[left] ^= 0x80;
+		gf_mulx(pad);
+	}
+
+	for (i = 0; i < AES_BLOCK_SIZE; i++)
+		pad[i] ^= cbc[i];
+	crypto_cipher_encrypt_one(tfm, pad, pad);
+	memcpy(mac, pad, CMAC_TLEN);
+}
+
+
+void ieee80211_aes_cmac(struct crypto_cipher *tfm, const u8 *aad,
+			const u8 *data, size_t data_len, u8 *mic)
+{
+	const u8 *addr[3];
+	size_t len[3];
+	u8 zero[CMAC_TLEN];
+
+	memset(zero, 0, CMAC_TLEN);
+	addr[0] = aad;
+	len[0] = AAD_LEN;
+	addr[1] = data;
+	len[1] = data_len - CMAC_TLEN;
+	addr[2] = zero;
+	len[2] = CMAC_TLEN;
+
+	aes_128_cmac_vector(tfm, 3, addr, len, mic);
+}
+
+
+struct crypto_cipher * ieee80211_aes_cmac_key_setup(const u8 key[])
+{
+	struct crypto_cipher *tfm;
+
+	tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
+	if (!IS_ERR(tfm))
+		crypto_cipher_setkey(tfm, key, AES_CMAC_KEY_LEN);
+
+	return tfm;
+}
+
+
+void ieee80211_aes_cmac_key_free(struct crypto_cipher *tfm)
+{
+	crypto_free_cipher(tfm);
+}
+
+void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf,
+					u8 *k1, u8 *k2)
+{
+	u8 l[AES_BLOCK_SIZE] = {};
+	struct ieee80211_key *key =
+		container_of(keyconf, struct ieee80211_key, conf);
+
+	crypto_cipher_encrypt_one(key->u.aes_cmac.tfm, l, l);
+
+	memcpy(k1, l, AES_BLOCK_SIZE);
+	gf_mulx(k1);
+
+	memcpy(k2, k1, AES_BLOCK_SIZE);
+	gf_mulx(k2);
+}
+EXPORT_SYMBOL(ieee80211_aes_cmac_calculate_k1_k2);
diff --git a/net/mac80211/aes_cmac.h b/net/mac80211/aes_cmac.h
new file mode 100644
index 0000000..20785a6
--- /dev/null
+++ b/net/mac80211/aes_cmac.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2008, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef AES_CMAC_H
+#define AES_CMAC_H
+
+#include <linux/crypto.h>
+
+struct crypto_cipher * ieee80211_aes_cmac_key_setup(const u8 key[]);
+void ieee80211_aes_cmac(struct crypto_cipher *tfm, const u8 *aad,
+			const u8 *data, size_t data_len, u8 *mic);
+void ieee80211_aes_cmac_key_free(struct crypto_cipher *tfm);
+
+#endif /* AES_CMAC_H */
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
new file mode 100644
index 0000000..31bf258
--- /dev/null
+++ b/net/mac80211/agg-rx.c
@@ -0,0 +1,355 @@
+/*
+ * HT handling
+ *
+ * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2007-2010, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/**
+ * DOC: RX A-MPDU aggregation
+ *
+ * Aggregation on the RX side requires only implementing the
+ * @ampdu_action callback that is invoked to start/stop any
+ * block-ack sessions for RX aggregation.
+ *
+ * When RX aggregation is started by the peer, the driver is
+ * notified via @ampdu_action function, with the
+ * %IEEE80211_AMPDU_RX_START action, and may reject the request
+ * in which case a negative response is sent to the peer, if it
+ * accepts it a positive response is sent.
+ *
+ * While the session is active, the device/driver are required
+ * to de-aggregate frames and pass them up one by one to mac80211,
+ * which will handle the reorder buffer.
+ *
+ * When the aggregation session is stopped again by the peer or
+ * ourselves, the driver's @ampdu_action function will be called
+ * with the action %IEEE80211_AMPDU_RX_STOP. In this case, the
+ * call must not fail.
+ */
+
+#include <linux/ieee80211.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+
+static void ieee80211_free_tid_rx(struct rcu_head *h)
+{
+	struct tid_ampdu_rx *tid_rx =
+		container_of(h, struct tid_ampdu_rx, rcu_head);
+	int i;
+
+	del_timer_sync(&tid_rx->reorder_timer);
+
+	for (i = 0; i < tid_rx->buf_size; i++)
+		dev_kfree_skb(tid_rx->reorder_buf[i]);
+	kfree(tid_rx->reorder_buf);
+	kfree(tid_rx->reorder_time);
+	kfree(tid_rx);
+}
+
+void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
+				     u16 initiator, u16 reason, bool tx)
+{
+	struct ieee80211_local *local = sta->local;
+	struct tid_ampdu_rx *tid_rx;
+
+	lockdep_assert_held(&sta->ampdu_mlme.mtx);
+
+	tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid],
+					lockdep_is_held(&sta->ampdu_mlme.mtx));
+
+	if (!tid_rx)
+		return;
+
+	RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL);
+
+	ht_dbg(sta->sdata,
+	       "Rx BA session stop requested for %pM tid %u %s reason: %d\n",
+	       sta->sta.addr, tid,
+	       initiator == WLAN_BACK_RECIPIENT ? "recipient" : "inititator",
+	       (int)reason);
+
+	if (drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_STOP,
+			     &sta->sta, tid, NULL, 0))
+		sdata_info(sta->sdata,
+			   "HW problem - can not stop rx aggregation for %pM tid %d\n",
+			   sta->sta.addr, tid);
+
+	/* check if this is a self generated aggregation halt */
+	if (initiator == WLAN_BACK_RECIPIENT && tx)
+		ieee80211_send_delba(sta->sdata, sta->sta.addr,
+				     tid, WLAN_BACK_RECIPIENT, reason);
+
+	del_timer_sync(&tid_rx->session_timer);
+
+	call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx);
+}
+
+void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
+				    u16 initiator, u16 reason, bool tx)
+{
+	mutex_lock(&sta->ampdu_mlme.mtx);
+	___ieee80211_stop_rx_ba_session(sta, tid, initiator, reason, tx);
+	mutex_unlock(&sta->ampdu_mlme.mtx);
+}
+
+void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
+				  const u8 *addr)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct sta_info *sta;
+	int i;
+
+	rcu_read_lock();
+	sta = sta_info_get_bss(sdata, addr);
+	if (!sta) {
+		rcu_read_unlock();
+		return;
+	}
+
+	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
+		if (ba_rx_bitmap & BIT(i))
+			set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested);
+
+	ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL(ieee80211_stop_rx_ba_session);
+
+/*
+ * After accepting the AddBA Request we activated a timer,
+ * resetting it after each frame that arrives from the originator.
+ */
+static void sta_rx_agg_session_timer_expired(unsigned long data)
+{
+	/* not an elegant detour, but there is no choice as the timer passes
+	 * only one argument, and various sta_info are needed here, so init
+	 * flow in sta_info_create gives the TID as data, while the timer_to_id
+	 * array gives the sta through container_of */
+	u8 *ptid = (u8 *)data;
+	u8 *timer_to_id = ptid - *ptid;
+	struct sta_info *sta = container_of(timer_to_id, struct sta_info,
+					 timer_to_tid[0]);
+	struct tid_ampdu_rx *tid_rx;
+	unsigned long timeout;
+
+	rcu_read_lock();
+	tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[*ptid]);
+	if (!tid_rx) {
+		rcu_read_unlock();
+		return;
+	}
+
+	timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout);
+	if (time_is_after_jiffies(timeout)) {
+		mod_timer(&tid_rx->session_timer, timeout);
+		rcu_read_unlock();
+		return;
+	}
+	rcu_read_unlock();
+
+	ht_dbg(sta->sdata, "RX session timer expired on %pM tid %d\n",
+	       sta->sta.addr, (u16)*ptid);
+
+	set_bit(*ptid, sta->ampdu_mlme.tid_rx_timer_expired);
+	ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
+}
+
+static void sta_rx_agg_reorder_timer_expired(unsigned long data)
+{
+	u8 *ptid = (u8 *)data;
+	u8 *timer_to_id = ptid - *ptid;
+	struct sta_info *sta = container_of(timer_to_id, struct sta_info,
+			timer_to_tid[0]);
+
+	rcu_read_lock();
+	ieee80211_release_reorder_timeout(sta, *ptid);
+	rcu_read_unlock();
+}
+
+static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
+				      u8 dialog_token, u16 status, u16 policy,
+				      u16 buf_size, u16 timeout)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	u16 capab;
+
+	skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+	memset(mgmt, 0, 24);
+	memcpy(mgmt->da, da, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	if (sdata->vif.type == NL80211_IFTYPE_AP ||
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+	    sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
+		memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
+	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
+		memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+	else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+		memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
+
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+
+	skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
+	mgmt->u.action.category = WLAN_CATEGORY_BACK;
+	mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
+	mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
+
+	capab = (u16)(policy << 1);	/* bit 1 aggregation policy */
+	capab |= (u16)(tid << 2); 	/* bit 5:2 TID number */
+	capab |= (u16)(buf_size << 6);	/* bit 15:6 max size of aggregation */
+
+	mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
+	mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
+	mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
+
+	ieee80211_tx_skb(sdata, skb);
+}
+
+void ieee80211_process_addba_request(struct ieee80211_local *local,
+				     struct sta_info *sta,
+				     struct ieee80211_mgmt *mgmt,
+				     size_t len)
+{
+	struct tid_ampdu_rx *tid_agg_rx;
+	u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
+	u8 dialog_token;
+	int ret = -EOPNOTSUPP;
+
+	/* extract session parameters from addba request frame */
+	dialog_token = mgmt->u.action.u.addba_req.dialog_token;
+	timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
+	start_seq_num =
+		le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
+
+	capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
+	ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
+	tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
+	buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
+
+	status = WLAN_STATUS_REQUEST_DECLINED;
+
+	if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
+		ht_dbg(sta->sdata,
+		       "Suspend in progress - Denying ADDBA request (%pM tid %d)\n",
+		       sta->sta.addr, tid);
+		goto end_no_lock;
+	}
+
+	/* sanity check for incoming parameters:
+	 * check if configuration can support the BA policy
+	 * and if buffer size does not exceeds max value */
+	/* XXX: check own ht delayed BA capability?? */
+	if (((ba_policy != 1) &&
+	     (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) ||
+	    (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
+		status = WLAN_STATUS_INVALID_QOS_PARAM;
+		ht_dbg_ratelimited(sta->sdata,
+				   "AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n",
+				   mgmt->sa, tid, ba_policy, buf_size);
+		goto end_no_lock;
+	}
+	/* determine default buffer size */
+	if (buf_size == 0)
+		buf_size = IEEE80211_MAX_AMPDU_BUF;
+
+	/* make sure the size doesn't exceed the maximum supported by the hw */
+	if (buf_size > local->hw.max_rx_aggregation_subframes)
+		buf_size = local->hw.max_rx_aggregation_subframes;
+
+	/* examine state machine */
+	mutex_lock(&sta->ampdu_mlme.mtx);
+
+	if (sta->ampdu_mlme.tid_rx[tid]) {
+		ht_dbg_ratelimited(sta->sdata,
+				   "unexpected AddBA Req from %pM on tid %u\n",
+				   mgmt->sa, tid);
+
+		/* delete existing Rx BA session on the same tid */
+		___ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
+						WLAN_STATUS_UNSPECIFIED_QOS,
+						false);
+	}
+
+	/* prepare A-MPDU MLME for Rx aggregation */
+	tid_agg_rx = kmalloc(sizeof(struct tid_ampdu_rx), GFP_KERNEL);
+	if (!tid_agg_rx)
+		goto end;
+
+	spin_lock_init(&tid_agg_rx->reorder_lock);
+
+	/* rx timer */
+	tid_agg_rx->session_timer.function = sta_rx_agg_session_timer_expired;
+	tid_agg_rx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid];
+	init_timer_deferrable(&tid_agg_rx->session_timer);
+
+	/* rx reorder timer */
+	tid_agg_rx->reorder_timer.function = sta_rx_agg_reorder_timer_expired;
+	tid_agg_rx->reorder_timer.data = (unsigned long)&sta->timer_to_tid[tid];
+	init_timer(&tid_agg_rx->reorder_timer);
+
+	/* prepare reordering buffer */
+	tid_agg_rx->reorder_buf =
+		kcalloc(buf_size, sizeof(struct sk_buff *), GFP_KERNEL);
+	tid_agg_rx->reorder_time =
+		kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL);
+	if (!tid_agg_rx->reorder_buf || !tid_agg_rx->reorder_time) {
+		kfree(tid_agg_rx->reorder_buf);
+		kfree(tid_agg_rx->reorder_time);
+		kfree(tid_agg_rx);
+		goto end;
+	}
+
+	ret = drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_START,
+			       &sta->sta, tid, &start_seq_num, 0);
+	ht_dbg(sta->sdata, "Rx A-MPDU request on %pM tid %d result %d\n",
+	       sta->sta.addr, tid, ret);
+	if (ret) {
+		kfree(tid_agg_rx->reorder_buf);
+		kfree(tid_agg_rx->reorder_time);
+		kfree(tid_agg_rx);
+		goto end;
+	}
+
+	/* update data */
+	tid_agg_rx->dialog_token = dialog_token;
+	tid_agg_rx->ssn = start_seq_num;
+	tid_agg_rx->head_seq_num = start_seq_num;
+	tid_agg_rx->buf_size = buf_size;
+	tid_agg_rx->timeout = timeout;
+	tid_agg_rx->stored_mpdu_num = 0;
+	status = WLAN_STATUS_SUCCESS;
+
+	/* activate it for RX */
+	rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx);
+
+	if (timeout) {
+		mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout));
+		tid_agg_rx->last_rx = jiffies;
+	}
+
+end:
+	mutex_unlock(&sta->ampdu_mlme.mtx);
+
+end_no_lock:
+	ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid,
+				  dialog_token, status, 1, buf_size, timeout);
+}
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
new file mode 100644
index 0000000..13b7683
--- /dev/null
+++ b/net/mac80211/agg-tx.c
@@ -0,0 +1,931 @@
+/*
+ * HT handling
+ *
+ * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2007-2010, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ieee80211.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "wme.h"
+
+/**
+ * DOC: TX A-MPDU aggregation
+ *
+ * Aggregation on the TX side requires setting the hardware flag
+ * %IEEE80211_HW_AMPDU_AGGREGATION. The driver will then be handed
+ * packets with a flag indicating A-MPDU aggregation. The driver
+ * or device is responsible for actually aggregating the frames,
+ * as well as deciding how many and which to aggregate.
+ *
+ * When TX aggregation is started by some subsystem (usually the rate
+ * control algorithm would be appropriate) by calling the
+ * ieee80211_start_tx_ba_session() function, the driver will be
+ * notified via its @ampdu_action function, with the
+ * %IEEE80211_AMPDU_TX_START action.
+ *
+ * In response to that, the driver is later required to call the
+ * ieee80211_start_tx_ba_cb_irqsafe() function, which will really
+ * start the aggregation session after the peer has also responded.
+ * If the peer responds negatively, the session will be stopped
+ * again right away. Note that it is possible for the aggregation
+ * session to be stopped before the driver has indicated that it
+ * is done setting it up, in which case it must not indicate the
+ * setup completion.
+ *
+ * Also note that, since we also need to wait for a response from
+ * the peer, the driver is notified of the completion of the
+ * handshake by the %IEEE80211_AMPDU_TX_OPERATIONAL action to the
+ * @ampdu_action callback.
+ *
+ * Similarly, when the aggregation session is stopped by the peer
+ * or something calling ieee80211_stop_tx_ba_session(), the driver's
+ * @ampdu_action function will be called with the action
+ * %IEEE80211_AMPDU_TX_STOP. In this case, the call must not fail,
+ * and the driver must later call ieee80211_stop_tx_ba_cb_irqsafe().
+ * Note that the sta can get destroyed before the BA tear down is
+ * complete.
+ */
+
+static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
+					 const u8 *da, u16 tid,
+					 u8 dialog_token, u16 start_seq_num,
+					 u16 agg_size, u16 timeout)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	u16 capab;
+
+	skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
+
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+	memset(mgmt, 0, 24);
+	memcpy(mgmt->da, da, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	if (sdata->vif.type == NL80211_IFTYPE_AP ||
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+	    sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
+		memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
+	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
+		memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+	else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+		memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
+
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+
+	skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
+
+	mgmt->u.action.category = WLAN_CATEGORY_BACK;
+	mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
+
+	mgmt->u.action.u.addba_req.dialog_token = dialog_token;
+	capab = (u16)(1 << 1);		/* bit 1 aggregation policy */
+	capab |= (u16)(tid << 2); 	/* bit 5:2 TID number */
+	capab |= (u16)(agg_size << 6);	/* bit 15:6 max size of aggergation */
+
+	mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
+
+	mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
+	mgmt->u.action.u.addba_req.start_seq_num =
+					cpu_to_le16(start_seq_num << 4);
+
+	ieee80211_tx_skb_tid(sdata, skb, tid);
+}
+
+void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_bar *bar;
+	u16 bar_control = 0;
+
+	skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+	bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
+	memset(bar, 0, sizeof(*bar));
+	bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
+					 IEEE80211_STYPE_BACK_REQ);
+	memcpy(bar->ra, ra, ETH_ALEN);
+	memcpy(bar->ta, sdata->vif.addr, ETH_ALEN);
+	bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
+	bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
+	bar_control |= (u16)(tid << IEEE80211_BAR_CTRL_TID_INFO_SHIFT);
+	bar->control = cpu_to_le16(bar_control);
+	bar->start_seq_num = cpu_to_le16(ssn);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
+					IEEE80211_TX_CTL_REQ_TX_STATUS;
+	ieee80211_tx_skb_tid(sdata, skb, tid);
+}
+EXPORT_SYMBOL(ieee80211_send_bar);
+
+void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
+			     struct tid_ampdu_tx *tid_tx)
+{
+	lockdep_assert_held(&sta->ampdu_mlme.mtx);
+	lockdep_assert_held(&sta->lock);
+	rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], tid_tx);
+}
+
+static inline int ieee80211_ac_from_tid(int tid)
+{
+	return ieee802_1d_to_ac[tid & 7];
+}
+
+/*
+ * When multiple aggregation sessions on multiple stations
+ * are being created/destroyed simultaneously, we need to
+ * refcount the global queue stop caused by that in order
+ * to not get into a situation where one of the aggregation
+ * setup or teardown re-enables queues before the other is
+ * ready to handle that.
+ *
+ * These two functions take care of this issue by keeping
+ * a global "agg_queue_stop" refcount.
+ */
+static void __acquires(agg_queue)
+ieee80211_stop_queue_agg(struct ieee80211_sub_if_data *sdata, int tid)
+{
+	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
+
+	if (atomic_inc_return(&sdata->local->agg_queue_stop[queue]) == 1)
+		ieee80211_stop_queue_by_reason(
+			&sdata->local->hw, queue,
+			IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
+	__acquire(agg_queue);
+}
+
+static void __releases(agg_queue)
+ieee80211_wake_queue_agg(struct ieee80211_sub_if_data *sdata, int tid)
+{
+	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
+
+	if (atomic_dec_return(&sdata->local->agg_queue_stop[queue]) == 0)
+		ieee80211_wake_queue_by_reason(
+			&sdata->local->hw, queue,
+			IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
+	__release(agg_queue);
+}
+
+/*
+ * splice packets from the STA's pending to the local pending,
+ * requires a call to ieee80211_agg_splice_finish later
+ */
+static void __acquires(agg_queue)
+ieee80211_agg_splice_packets(struct ieee80211_sub_if_data *sdata,
+			     struct tid_ampdu_tx *tid_tx, u16 tid)
+{
+	struct ieee80211_local *local = sdata->local;
+	int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)];
+	unsigned long flags;
+
+	ieee80211_stop_queue_agg(sdata, tid);
+
+	if (WARN(!tid_tx,
+		 "TID %d gone but expected when splicing aggregates from the pending queue\n",
+		 tid))
+		return;
+
+	if (!skb_queue_empty(&tid_tx->pending)) {
+		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+		/* copy over remaining packets */
+		skb_queue_splice_tail_init(&tid_tx->pending,
+					   &local->pending[queue]);
+		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+	}
+}
+
+static void __releases(agg_queue)
+ieee80211_agg_splice_finish(struct ieee80211_sub_if_data *sdata, u16 tid)
+{
+	ieee80211_wake_queue_agg(sdata, tid);
+}
+
+static void ieee80211_remove_tid_tx(struct sta_info *sta, int tid)
+{
+	struct tid_ampdu_tx *tid_tx;
+
+	lockdep_assert_held(&sta->ampdu_mlme.mtx);
+	lockdep_assert_held(&sta->lock);
+
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+	/*
+	 * When we get here, the TX path will not be lockless any more wrt.
+	 * aggregation, since the OPERATIONAL bit has long been cleared.
+	 * Thus it will block on getting the lock, if it occurs. So if we
+	 * stop the queue now, we will not get any more packets, and any
+	 * that might be being processed will wait for us here, thereby
+	 * guaranteeing that no packets go to the tid_tx pending queue any
+	 * more.
+	 */
+
+	ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid);
+
+	/* future packets must not find the tid_tx struct any more */
+	ieee80211_assign_tid_tx(sta, tid, NULL);
+
+	ieee80211_agg_splice_finish(sta->sdata, tid);
+
+	kfree_rcu(tid_tx, rcu_head);
+}
+
+int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
+				    enum ieee80211_agg_stop_reason reason)
+{
+	struct ieee80211_local *local = sta->local;
+	struct tid_ampdu_tx *tid_tx;
+	enum ieee80211_ampdu_mlme_action action;
+	int ret;
+
+	lockdep_assert_held(&sta->ampdu_mlme.mtx);
+
+	switch (reason) {
+	case AGG_STOP_DECLINED:
+	case AGG_STOP_LOCAL_REQUEST:
+	case AGG_STOP_PEER_REQUEST:
+		action = IEEE80211_AMPDU_TX_STOP_CONT;
+		break;
+	case AGG_STOP_DESTROY_STA:
+		action = IEEE80211_AMPDU_TX_STOP_FLUSH;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&sta->lock);
+
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+	if (!tid_tx) {
+		spin_unlock_bh(&sta->lock);
+		return -ENOENT;
+	}
+
+	/*
+	 * if we're already stopping ignore any new requests to stop
+	 * unless we're destroying it in which case notify the driver
+	 */
+	if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
+		spin_unlock_bh(&sta->lock);
+		if (reason != AGG_STOP_DESTROY_STA)
+			return -EALREADY;
+		ret = drv_ampdu_action(local, sta->sdata,
+				       IEEE80211_AMPDU_TX_STOP_FLUSH_CONT,
+				       &sta->sta, tid, NULL, 0);
+		WARN_ON_ONCE(ret);
+		return 0;
+	}
+
+	if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
+		/* not even started yet! */
+		ieee80211_assign_tid_tx(sta, tid, NULL);
+		spin_unlock_bh(&sta->lock);
+		kfree_rcu(tid_tx, rcu_head);
+		return 0;
+	}
+
+	set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state);
+
+	spin_unlock_bh(&sta->lock);
+
+	ht_dbg(sta->sdata, "Tx BA session stop requested for %pM tid %u\n",
+	       sta->sta.addr, tid);
+
+	del_timer_sync(&tid_tx->addba_resp_timer);
+	del_timer_sync(&tid_tx->session_timer);
+
+	/*
+	 * After this packets are no longer handed right through
+	 * to the driver but are put onto tid_tx->pending instead,
+	 * with locking to ensure proper access.
+	 */
+	clear_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state);
+
+	/*
+	 * There might be a few packets being processed right now (on
+	 * another CPU) that have already gotten past the aggregation
+	 * check when it was still OPERATIONAL and consequently have
+	 * IEEE80211_TX_CTL_AMPDU set. In that case, this code might
+	 * call into the driver at the same time or even before the
+	 * TX paths calls into it, which could confuse the driver.
+	 *
+	 * Wait for all currently running TX paths to finish before
+	 * telling the driver. New packets will not go through since
+	 * the aggregation session is no longer OPERATIONAL.
+	 */
+	synchronize_net();
+
+	tid_tx->stop_initiator = reason == AGG_STOP_PEER_REQUEST ?
+					WLAN_BACK_RECIPIENT :
+					WLAN_BACK_INITIATOR;
+	tid_tx->tx_stop = reason == AGG_STOP_LOCAL_REQUEST;
+
+	ret = drv_ampdu_action(local, sta->sdata, action,
+			       &sta->sta, tid, NULL, 0);
+
+	/* HW shall not deny going back to legacy */
+	if (WARN_ON(ret)) {
+		/*
+		 * We may have pending packets get stuck in this case...
+		 * Not bothering with a workaround for now.
+		 */
+	}
+
+	/*
+	 * In the case of AGG_STOP_DESTROY_STA, the driver won't
+	 * necessarily call ieee80211_stop_tx_ba_cb(), so this may
+	 * seem like we can leave the tid_tx data pending forever.
+	 * This is true, in a way, but "forever" is only until the
+	 * station struct is actually destroyed. In the meantime,
+	 * leaving it around ensures that we don't transmit packets
+	 * to the driver on this TID which might confuse it.
+	 */
+
+	return 0;
+}
+
+/*
+ * After sending add Block Ack request we activated a timer until
+ * add Block Ack response will arrive from the recipient.
+ * If this timer expires sta_addba_resp_timer_expired will be executed.
+ */
+static void sta_addba_resp_timer_expired(unsigned long data)
+{
+	/* not an elegant detour, but there is no choice as the timer passes
+	 * only one argument, and both sta_info and TID are needed, so init
+	 * flow in sta_info_create gives the TID as data, while the timer_to_id
+	 * array gives the sta through container_of */
+	u16 tid = *(u8 *)data;
+	struct sta_info *sta = container_of((void *)data,
+		struct sta_info, timer_to_tid[tid]);
+	struct tid_ampdu_tx *tid_tx;
+
+	/* check if the TID waits for addBA response */
+	rcu_read_lock();
+	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
+	if (!tid_tx ||
+	    test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) {
+		rcu_read_unlock();
+		ht_dbg(sta->sdata,
+		       "timer expired on %pM tid %d but we are not (or no longer) expecting addBA response there\n",
+		       sta->sta.addr, tid);
+		return;
+	}
+
+	ht_dbg(sta->sdata, "addBA response timer expired on %pM tid %d\n",
+	       sta->sta.addr, tid);
+
+	ieee80211_stop_tx_ba_session(&sta->sta, tid);
+	rcu_read_unlock();
+}
+
+void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
+{
+	struct tid_ampdu_tx *tid_tx;
+	struct ieee80211_local *local = sta->local;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	u16 start_seq_num;
+	int ret;
+
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+	/*
+	 * Start queuing up packets for this aggregation session.
+	 * We're going to release them once the driver is OK with
+	 * that.
+	 */
+	clear_bit(HT_AGG_STATE_WANT_START, &tid_tx->state);
+
+	/*
+	 * Make sure no packets are being processed. This ensures that
+	 * we have a valid starting sequence number and that in-flight
+	 * packets have been flushed out and no packets for this TID
+	 * will go into the driver during the ampdu_action call.
+	 */
+	synchronize_net();
+
+	start_seq_num = sta->tid_seq[tid] >> 4;
+
+	ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START,
+			       &sta->sta, tid, &start_seq_num, 0);
+	if (ret) {
+		ht_dbg(sdata,
+		       "BA request denied - HW unavailable for %pM tid %d\n",
+		       sta->sta.addr, tid);
+		spin_lock_bh(&sta->lock);
+		ieee80211_agg_splice_packets(sdata, tid_tx, tid);
+		ieee80211_assign_tid_tx(sta, tid, NULL);
+		ieee80211_agg_splice_finish(sdata, tid);
+		spin_unlock_bh(&sta->lock);
+
+		kfree_rcu(tid_tx, rcu_head);
+		return;
+	}
+
+	/* activate the timer for the recipient's addBA response */
+	mod_timer(&tid_tx->addba_resp_timer, jiffies + ADDBA_RESP_INTERVAL);
+	ht_dbg(sdata, "activated addBA response timer on %pM tid %d\n",
+	       sta->sta.addr, tid);
+
+	spin_lock_bh(&sta->lock);
+	sta->ampdu_mlme.last_addba_req_time[tid] = jiffies;
+	sta->ampdu_mlme.addba_req_num[tid]++;
+	spin_unlock_bh(&sta->lock);
+
+	/* send AddBA request */
+	ieee80211_send_addba_request(sdata, sta->sta.addr, tid,
+				     tid_tx->dialog_token, start_seq_num,
+				     local->hw.max_tx_aggregation_subframes,
+				     tid_tx->timeout);
+}
+
+/*
+ * After accepting the AddBA Response we activated a timer,
+ * resetting it after each frame that we send.
+ */
+static void sta_tx_agg_session_timer_expired(unsigned long data)
+{
+	/* not an elegant detour, but there is no choice as the timer passes
+	 * only one argument, and various sta_info are needed here, so init
+	 * flow in sta_info_create gives the TID as data, while the timer_to_id
+	 * array gives the sta through container_of */
+	u8 *ptid = (u8 *)data;
+	u8 *timer_to_id = ptid - *ptid;
+	struct sta_info *sta = container_of(timer_to_id, struct sta_info,
+					 timer_to_tid[0]);
+	struct tid_ampdu_tx *tid_tx;
+	unsigned long timeout;
+
+	rcu_read_lock();
+	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[*ptid]);
+	if (!tid_tx || test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
+		rcu_read_unlock();
+		return;
+	}
+
+	timeout = tid_tx->last_tx + TU_TO_JIFFIES(tid_tx->timeout);
+	if (time_is_after_jiffies(timeout)) {
+		mod_timer(&tid_tx->session_timer, timeout);
+		rcu_read_unlock();
+		return;
+	}
+
+	rcu_read_unlock();
+
+	ht_dbg(sta->sdata, "tx session timer expired on %pM tid %d\n",
+	       sta->sta.addr, (u16)*ptid);
+
+	ieee80211_stop_tx_ba_session(&sta->sta, *ptid);
+}
+
+int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
+				  u16 timeout)
+{
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct tid_ampdu_tx *tid_tx;
+	int ret = 0;
+
+	trace_api_start_tx_ba_session(pubsta, tid);
+
+	if (WARN_ON_ONCE(!local->ops->ampdu_action))
+		return -EINVAL;
+
+	if ((tid >= IEEE80211_NUM_TIDS) ||
+	    !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) ||
+	    (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW))
+		return -EINVAL;
+
+	ht_dbg(sdata, "Open BA session requested for %pM tid %u\n",
+	       pubsta->addr, tid);
+
+	if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+	    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
+	    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+	    sdata->vif.type != NL80211_IFTYPE_AP &&
+	    sdata->vif.type != NL80211_IFTYPE_ADHOC)
+		return -EINVAL;
+
+	if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
+		ht_dbg(sdata,
+		       "BA sessions blocked - Denying BA session request %pM tid %d\n",
+		       sta->sta.addr, tid);
+		return -EINVAL;
+	}
+
+	/*
+	 * 802.11n-2009 11.5.1.1: If the initiating STA is an HT STA, is a
+	 * member of an IBSS, and has no other existing Block Ack agreement
+	 * with the recipient STA, then the initiating STA shall transmit a
+	 * Probe Request frame to the recipient STA and shall not transmit an
+	 * ADDBA Request frame unless it receives a Probe Response frame
+	 * from the recipient within dot11ADDBAFailureTimeout.
+	 *
+	 * The probe request mechanism for ADDBA is currently not implemented,
+	 * but we only build up Block Ack session with HT STAs. This information
+	 * is set when we receive a bss info from a probe response or a beacon.
+	 */
+	if (sta->sdata->vif.type == NL80211_IFTYPE_ADHOC &&
+	    !sta->sta.ht_cap.ht_supported) {
+		ht_dbg(sdata,
+		       "BA request denied - IBSS STA %pM does not advertise HT support\n",
+		       pubsta->addr);
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&sta->lock);
+
+	/* we have tried too many times, receiver does not want A-MPDU */
+	if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
+		ret = -EBUSY;
+		goto err_unlock_sta;
+	}
+
+	/*
+	 * if we have tried more than HT_AGG_BURST_RETRIES times we
+	 * will spread our requests in time to avoid stalling connection
+	 * for too long
+	 */
+	if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_BURST_RETRIES &&
+	    time_before(jiffies, sta->ampdu_mlme.last_addba_req_time[tid] +
+			HT_AGG_RETRIES_PERIOD)) {
+		ht_dbg(sdata,
+		       "BA request denied - waiting a grace period after %d failed requests on %pM tid %u\n",
+		       sta->ampdu_mlme.addba_req_num[tid], sta->sta.addr, tid);
+		ret = -EBUSY;
+		goto err_unlock_sta;
+	}
+
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+	/* check if the TID is not in aggregation flow already */
+	if (tid_tx || sta->ampdu_mlme.tid_start_tx[tid]) {
+		ht_dbg(sdata,
+		       "BA request denied - session is not idle on %pM tid %u\n",
+		       sta->sta.addr, tid);
+		ret = -EAGAIN;
+		goto err_unlock_sta;
+	}
+
+	/* prepare A-MPDU MLME for Tx aggregation */
+	tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
+	if (!tid_tx) {
+		ret = -ENOMEM;
+		goto err_unlock_sta;
+	}
+
+	skb_queue_head_init(&tid_tx->pending);
+	__set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state);
+
+	tid_tx->timeout = timeout;
+
+	/* response timer */
+	tid_tx->addba_resp_timer.function = sta_addba_resp_timer_expired;
+	tid_tx->addba_resp_timer.data = (unsigned long)&sta->timer_to_tid[tid];
+	init_timer(&tid_tx->addba_resp_timer);
+
+	/* tx timer */
+	tid_tx->session_timer.function = sta_tx_agg_session_timer_expired;
+	tid_tx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid];
+	init_timer_deferrable(&tid_tx->session_timer);
+
+	/* assign a dialog token */
+	sta->ampdu_mlme.dialog_token_allocator++;
+	tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator;
+
+	/*
+	 * Finally, assign it to the start array; the work item will
+	 * collect it and move it to the normal array.
+	 */
+	sta->ampdu_mlme.tid_start_tx[tid] = tid_tx;
+
+	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+
+	/* this flow continues off the work */
+ err_unlock_sta:
+	spin_unlock_bh(&sta->lock);
+	return ret;
+}
+EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
+
+static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
+					 struct sta_info *sta, u16 tid)
+{
+	struct tid_ampdu_tx *tid_tx;
+
+	lockdep_assert_held(&sta->ampdu_mlme.mtx);
+
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+	ht_dbg(sta->sdata, "Aggregation is on for %pM tid %d\n",
+	       sta->sta.addr, tid);
+
+	drv_ampdu_action(local, sta->sdata,
+			 IEEE80211_AMPDU_TX_OPERATIONAL,
+			 &sta->sta, tid, NULL, tid_tx->buf_size);
+
+	/*
+	 * synchronize with TX path, while splicing the TX path
+	 * should block so it won't put more packets onto pending.
+	 */
+	spin_lock_bh(&sta->lock);
+
+	ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid);
+	/*
+	 * Now mark as operational. This will be visible
+	 * in the TX path, and lets it go lock-free in
+	 * the common case.
+	 */
+	set_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state);
+	ieee80211_agg_splice_finish(sta->sdata, tid);
+
+	spin_unlock_bh(&sta->lock);
+}
+
+void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	struct tid_ampdu_tx *tid_tx;
+
+	trace_api_start_tx_ba_cb(sdata, ra, tid);
+
+	if (tid >= IEEE80211_NUM_TIDS) {
+		ht_dbg(sdata, "Bad TID value: tid = %d (>= %d)\n",
+		       tid, IEEE80211_NUM_TIDS);
+		return;
+	}
+
+	mutex_lock(&local->sta_mtx);
+	sta = sta_info_get_bss(sdata, ra);
+	if (!sta) {
+		mutex_unlock(&local->sta_mtx);
+		ht_dbg(sdata, "Could not find station: %pM\n", ra);
+		return;
+	}
+
+	mutex_lock(&sta->ampdu_mlme.mtx);
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+	if (WARN_ON(!tid_tx)) {
+		ht_dbg(sdata, "addBA was not requested!\n");
+		goto unlock;
+	}
+
+	if (WARN_ON(test_and_set_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)))
+		goto unlock;
+
+	if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state))
+		ieee80211_agg_tx_operational(local, sta, tid);
+
+ unlock:
+	mutex_unlock(&sta->ampdu_mlme.mtx);
+	mutex_unlock(&local->sta_mtx);
+}
+
+void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
+				      const u8 *ra, u16 tid)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_ra_tid *ra_tid;
+	struct sk_buff *skb = dev_alloc_skb(0);
+
+	if (unlikely(!skb))
+		return;
+
+	ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
+	memcpy(&ra_tid->ra, ra, ETH_ALEN);
+	ra_tid->tid = tid;
+
+	skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_START;
+	skb_queue_tail(&sdata->skb_queue, skb);
+	ieee80211_queue_work(&local->hw, &sdata->work);
+}
+EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
+
+int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
+				   enum ieee80211_agg_stop_reason reason)
+{
+	int ret;
+
+	mutex_lock(&sta->ampdu_mlme.mtx);
+
+	ret = ___ieee80211_stop_tx_ba_session(sta, tid, reason);
+
+	mutex_unlock(&sta->ampdu_mlme.mtx);
+
+	return ret;
+}
+
+int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
+{
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct tid_ampdu_tx *tid_tx;
+	int ret = 0;
+
+	trace_api_stop_tx_ba_session(pubsta, tid);
+
+	if (!local->ops->ampdu_action)
+		return -EINVAL;
+
+	if (tid >= IEEE80211_NUM_TIDS)
+		return -EINVAL;
+
+	spin_lock_bh(&sta->lock);
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+	if (!tid_tx) {
+		ret = -ENOENT;
+		goto unlock;
+	}
+
+	if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
+		/* already in progress stopping it */
+		ret = 0;
+		goto unlock;
+	}
+
+	set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state);
+	ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
+
+ unlock:
+	spin_unlock_bh(&sta->lock);
+	return ret;
+}
+EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
+
+void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	struct tid_ampdu_tx *tid_tx;
+
+	trace_api_stop_tx_ba_cb(sdata, ra, tid);
+
+	if (tid >= IEEE80211_NUM_TIDS) {
+		ht_dbg(sdata, "Bad TID value: tid = %d (>= %d)\n",
+		       tid, IEEE80211_NUM_TIDS);
+		return;
+	}
+
+	ht_dbg(sdata, "Stopping Tx BA session for %pM tid %d\n", ra, tid);
+
+	mutex_lock(&local->sta_mtx);
+
+	sta = sta_info_get_bss(sdata, ra);
+	if (!sta) {
+		ht_dbg(sdata, "Could not find station: %pM\n", ra);
+		goto unlock;
+	}
+
+	mutex_lock(&sta->ampdu_mlme.mtx);
+	spin_lock_bh(&sta->lock);
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
+	if (!tid_tx || !test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
+		ht_dbg(sdata,
+		       "unexpected callback to A-MPDU stop for %pM tid %d\n",
+		       sta->sta.addr, tid);
+		goto unlock_sta;
+	}
+
+	if (tid_tx->stop_initiator == WLAN_BACK_INITIATOR && tid_tx->tx_stop)
+		ieee80211_send_delba(sta->sdata, ra, tid,
+			WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
+
+	ieee80211_remove_tid_tx(sta, tid);
+
+ unlock_sta:
+	spin_unlock_bh(&sta->lock);
+	mutex_unlock(&sta->ampdu_mlme.mtx);
+ unlock:
+	mutex_unlock(&local->sta_mtx);
+}
+
+void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
+				     const u8 *ra, u16 tid)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_ra_tid *ra_tid;
+	struct sk_buff *skb = dev_alloc_skb(0);
+
+	if (unlikely(!skb))
+		return;
+
+	ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
+	memcpy(&ra_tid->ra, ra, ETH_ALEN);
+	ra_tid->tid = tid;
+
+	skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_STOP;
+	skb_queue_tail(&sdata->skb_queue, skb);
+	ieee80211_queue_work(&local->hw, &sdata->work);
+}
+EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
+
+
+void ieee80211_process_addba_resp(struct ieee80211_local *local,
+				  struct sta_info *sta,
+				  struct ieee80211_mgmt *mgmt,
+				  size_t len)
+{
+	struct tid_ampdu_tx *tid_tx;
+	u16 capab, tid;
+	u8 buf_size;
+
+	capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
+	tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
+	buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
+
+	mutex_lock(&sta->ampdu_mlme.mtx);
+
+	tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+	if (!tid_tx)
+		goto out;
+
+	if (mgmt->u.action.u.addba_resp.dialog_token != tid_tx->dialog_token) {
+		ht_dbg(sta->sdata, "wrong addBA response token, %pM tid %d\n",
+		       sta->sta.addr, tid);
+		goto out;
+	}
+
+	del_timer_sync(&tid_tx->addba_resp_timer);
+
+	ht_dbg(sta->sdata, "switched off addBA timer for %pM tid %d\n",
+	       sta->sta.addr, tid);
+
+	/*
+	 * addba_resp_timer may have fired before we got here, and
+	 * caused WANT_STOP to be set. If the stop then was already
+	 * processed further, STOPPING might be set.
+	 */
+	if (test_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state) ||
+	    test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
+		ht_dbg(sta->sdata,
+		       "got addBA resp for %pM tid %d but we already gave up\n",
+		       sta->sta.addr, tid);
+		goto out;
+	}
+
+	/*
+	 * IEEE 802.11-2007 7.3.1.14:
+	 * In an ADDBA Response frame, when the Status Code field
+	 * is set to 0, the Buffer Size subfield is set to a value
+	 * of at least 1.
+	 */
+	if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
+			== WLAN_STATUS_SUCCESS && buf_size) {
+		if (test_and_set_bit(HT_AGG_STATE_RESPONSE_RECEIVED,
+				     &tid_tx->state)) {
+			/* ignore duplicate response */
+			goto out;
+		}
+
+		tid_tx->buf_size = buf_size;
+
+		if (test_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state))
+			ieee80211_agg_tx_operational(local, sta, tid);
+
+		sta->ampdu_mlme.addba_req_num[tid] = 0;
+
+		if (tid_tx->timeout) {
+			mod_timer(&tid_tx->session_timer,
+				  TU_TO_EXP_TIME(tid_tx->timeout));
+			tid_tx->last_tx = jiffies;
+		}
+
+	} else {
+		___ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_DECLINED);
+	}
+
+ out:
+	mutex_unlock(&sta->ampdu_mlme.mtx);
+}
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
new file mode 100644
index 0000000..f86f605
--- /dev/null
+++ b/net/mac80211/cfg.c
@@ -0,0 +1,3487 @@
+/*
+ * mac80211 configuration hooks for cfg80211
+ *
+ * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This file is GPLv2 as found in COPYING.
+ */
+
+#include <linux/ieee80211.h>
+#include <linux/nl80211.h>
+#include <linux/rtnetlink.h>
+#include <linux/slab.h>
+#include <net/net_namespace.h>
+#include <linux/rcupdate.h>
+#include <linux/if_ether.h>
+#include <net/cfg80211.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "cfg.h"
+#include "rate.h"
+#include "mesh.h"
+
+static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
+						const char *name,
+						enum nl80211_iftype type,
+						u32 *flags,
+						struct vif_params *params)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct wireless_dev *wdev;
+	struct ieee80211_sub_if_data *sdata;
+	int err;
+
+	err = ieee80211_if_add(local, name, &wdev, type, params);
+	if (err)
+		return ERR_PTR(err);
+
+	if (type == NL80211_IFTYPE_MONITOR && flags) {
+		sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+		sdata->u.mntr_flags = *flags;
+	}
+
+	return wdev;
+}
+
+static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
+{
+	ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
+
+	return 0;
+}
+
+static int ieee80211_change_iface(struct wiphy *wiphy,
+				  struct net_device *dev,
+				  enum nl80211_iftype type, u32 *flags,
+				  struct vif_params *params)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int ret;
+
+	ret = ieee80211_if_change_type(sdata, type);
+	if (ret)
+		return ret;
+
+	if (type == NL80211_IFTYPE_AP_VLAN &&
+	    params && params->use_4addr == 0)
+		RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
+	else if (type == NL80211_IFTYPE_STATION &&
+		 params && params->use_4addr >= 0)
+		sdata->u.mgd.use_4addr = params->use_4addr;
+
+	if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
+		struct ieee80211_local *local = sdata->local;
+
+		if (ieee80211_sdata_running(sdata)) {
+			/*
+			 * Prohibit MONITOR_FLAG_COOK_FRAMES to be
+			 * changed while the interface is up.
+			 * Else we would need to add a lot of cruft
+			 * to update everything:
+			 *	cooked_mntrs, monitor and all fif_* counters
+			 *	reconfigure hardware
+			 */
+			if ((*flags & MONITOR_FLAG_COOK_FRAMES) !=
+			    (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
+				return -EBUSY;
+
+			ieee80211_adjust_monitor_flags(sdata, -1);
+			sdata->u.mntr_flags = *flags;
+			ieee80211_adjust_monitor_flags(sdata, 1);
+
+			ieee80211_configure_filter(local);
+		} else {
+			/*
+			 * Because the interface is down, ieee80211_do_stop
+			 * and ieee80211_do_open take care of "everything"
+			 * mentioned in the comment above.
+			 */
+			sdata->u.mntr_flags = *flags;
+		}
+	}
+
+	return 0;
+}
+
+static int ieee80211_start_p2p_device(struct wiphy *wiphy,
+				      struct wireless_dev *wdev)
+{
+	return ieee80211_do_open(wdev, true);
+}
+
+static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
+				      struct wireless_dev *wdev)
+{
+	ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
+}
+
+static int ieee80211_set_noack_map(struct wiphy *wiphy,
+				  struct net_device *dev,
+				  u16 noack_map)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	sdata->noack_map = noack_map;
+	return 0;
+}
+
+static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
+			     u8 key_idx, bool pairwise, const u8 *mac_addr,
+			     struct key_params *params)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct sta_info *sta = NULL;
+	struct ieee80211_key *key;
+	int err;
+
+	if (!ieee80211_sdata_running(sdata))
+		return -ENETDOWN;
+
+	/* reject WEP and TKIP keys if WEP failed to initialize */
+	switch (params->cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_TKIP:
+	case WLAN_CIPHER_SUITE_WEP104:
+		if (IS_ERR(sdata->local->wep_tx_tfm))
+			return -EINVAL;
+		break;
+	default:
+		break;
+	}
+
+	key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
+				  params->key, params->seq_len, params->seq);
+	if (IS_ERR(key))
+		return PTR_ERR(key);
+
+	if (pairwise)
+		key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
+
+	mutex_lock(&sdata->local->sta_mtx);
+
+	if (mac_addr) {
+		if (ieee80211_vif_is_mesh(&sdata->vif))
+			sta = sta_info_get(sdata, mac_addr);
+		else
+			sta = sta_info_get_bss(sdata, mac_addr);
+		/*
+		 * The ASSOC test makes sure the driver is ready to
+		 * receive the key. When wpa_supplicant has roamed
+		 * using FT, it attempts to set the key before
+		 * association has completed, this rejects that attempt
+		 * so it will set the key again after assocation.
+		 *
+		 * TODO: accept the key if we have a station entry and
+		 *       add it to the device after the station.
+		 */
+		if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
+			ieee80211_key_free_unused(key);
+			err = -ENOENT;
+			goto out_unlock;
+		}
+	}
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_STATION:
+		if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
+			key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
+		break;
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_AP_VLAN:
+		/* Keys without a station are used for TX only */
+		if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
+			key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		/* no MFP (yet) */
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+#ifdef CPTCFG_MAC80211_MESH
+		if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
+			key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
+		break;
+#endif
+	case NL80211_IFTYPE_WDS:
+	case NL80211_IFTYPE_MONITOR:
+	case NL80211_IFTYPE_P2P_DEVICE:
+	case NL80211_IFTYPE_UNSPECIFIED:
+	case NUM_NL80211_IFTYPES:
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_P2P_GO:
+		/* shouldn't happen */
+		WARN_ON_ONCE(1);
+		break;
+	}
+
+	err = ieee80211_key_link(key, sdata, sta);
+
+ out_unlock:
+	mutex_unlock(&sdata->local->sta_mtx);
+
+	return err;
+}
+
+static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
+			     u8 key_idx, bool pairwise, const u8 *mac_addr)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	struct ieee80211_key *key = NULL;
+	int ret;
+
+	mutex_lock(&local->sta_mtx);
+	mutex_lock(&local->key_mtx);
+
+	if (mac_addr) {
+		ret = -ENOENT;
+
+		sta = sta_info_get_bss(sdata, mac_addr);
+		if (!sta)
+			goto out_unlock;
+
+		if (pairwise)
+			key = key_mtx_dereference(local, sta->ptk);
+		else
+			key = key_mtx_dereference(local, sta->gtk[key_idx]);
+	} else
+		key = key_mtx_dereference(local, sdata->keys[key_idx]);
+
+	if (!key) {
+		ret = -ENOENT;
+		goto out_unlock;
+	}
+
+	ieee80211_key_free(key, true);
+
+	ret = 0;
+ out_unlock:
+	mutex_unlock(&local->key_mtx);
+	mutex_unlock(&local->sta_mtx);
+
+	return ret;
+}
+
+static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
+			     u8 key_idx, bool pairwise, const u8 *mac_addr,
+			     void *cookie,
+			     void (*callback)(void *cookie,
+					      struct key_params *params))
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta = NULL;
+	u8 seq[6] = {0};
+	struct key_params params;
+	struct ieee80211_key *key = NULL;
+	u64 pn64;
+	u32 iv32;
+	u16 iv16;
+	int err = -ENOENT;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	rcu_read_lock();
+
+	if (mac_addr) {
+		sta = sta_info_get_bss(sdata, mac_addr);
+		if (!sta)
+			goto out;
+
+		if (pairwise)
+			key = rcu_dereference(sta->ptk);
+		else if (key_idx < NUM_DEFAULT_KEYS)
+			key = rcu_dereference(sta->gtk[key_idx]);
+	} else
+		key = rcu_dereference(sdata->keys[key_idx]);
+
+	if (!key)
+		goto out;
+
+	memset(&params, 0, sizeof(params));
+
+	params.cipher = key->conf.cipher;
+
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_TKIP:
+		iv32 = key->u.tkip.tx.iv32;
+		iv16 = key->u.tkip.tx.iv16;
+
+		if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
+			drv_get_tkip_seq(sdata->local,
+					 key->conf.hw_key_idx,
+					 &iv32, &iv16);
+
+		seq[0] = iv16 & 0xff;
+		seq[1] = (iv16 >> 8) & 0xff;
+		seq[2] = iv32 & 0xff;
+		seq[3] = (iv32 >> 8) & 0xff;
+		seq[4] = (iv32 >> 16) & 0xff;
+		seq[5] = (iv32 >> 24) & 0xff;
+		params.seq = seq;
+		params.seq_len = 6;
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		pn64 = atomic64_read(&key->u.ccmp.tx_pn);
+		seq[0] = pn64;
+		seq[1] = pn64 >> 8;
+		seq[2] = pn64 >> 16;
+		seq[3] = pn64 >> 24;
+		seq[4] = pn64 >> 32;
+		seq[5] = pn64 >> 40;
+		params.seq = seq;
+		params.seq_len = 6;
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		pn64 = atomic64_read(&key->u.aes_cmac.tx_pn);
+		seq[0] = pn64;
+		seq[1] = pn64 >> 8;
+		seq[2] = pn64 >> 16;
+		seq[3] = pn64 >> 24;
+		seq[4] = pn64 >> 32;
+		seq[5] = pn64 >> 40;
+		params.seq = seq;
+		params.seq_len = 6;
+		break;
+	}
+
+	params.key = key->conf.key;
+	params.key_len = key->conf.keylen;
+
+	callback(cookie, &params);
+	err = 0;
+
+ out:
+	rcu_read_unlock();
+	return err;
+}
+
+static int ieee80211_config_default_key(struct wiphy *wiphy,
+					struct net_device *dev,
+					u8 key_idx, bool uni,
+					bool multi)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	ieee80211_set_default_key(sdata, key_idx, uni, multi);
+
+	return 0;
+}
+
+static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
+					     struct net_device *dev,
+					     u8 key_idx)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	ieee80211_set_default_mgmt_key(sdata, key_idx);
+
+	return 0;
+}
+
+void sta_set_rate_info_tx(struct sta_info *sta,
+			  const struct ieee80211_tx_rate *rate,
+			  struct rate_info *rinfo)
+{
+	rinfo->flags = 0;
+	if (rate->flags & IEEE80211_TX_RC_MCS) {
+		rinfo->flags |= RATE_INFO_FLAGS_MCS;
+		rinfo->mcs = rate->idx;
+	} else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
+		rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
+		rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
+		rinfo->nss = ieee80211_rate_get_vht_nss(rate);
+	} else {
+		struct ieee80211_supported_band *sband;
+		sband = sta->local->hw.wiphy->bands[
+				ieee80211_get_sdata_band(sta->sdata)];
+		rinfo->legacy = sband->bitrates[rate->idx].bitrate;
+	}
+	if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+		rinfo->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+	if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
+		rinfo->flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
+	if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
+		rinfo->flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
+	if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
+		rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
+}
+
+void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
+{
+	rinfo->flags = 0;
+
+	if (sta->last_rx_rate_flag & RX_FLAG_HT) {
+		rinfo->flags |= RATE_INFO_FLAGS_MCS;
+		rinfo->mcs = sta->last_rx_rate_idx;
+	} else if (sta->last_rx_rate_flag & RX_FLAG_VHT) {
+		rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
+		rinfo->nss = sta->last_rx_rate_vht_nss;
+		rinfo->mcs = sta->last_rx_rate_idx;
+	} else {
+		struct ieee80211_supported_band *sband;
+
+		sband = sta->local->hw.wiphy->bands[
+				ieee80211_get_sdata_band(sta->sdata)];
+		rinfo->legacy =
+			sband->bitrates[sta->last_rx_rate_idx].bitrate;
+	}
+
+	if (sta->last_rx_rate_flag & RX_FLAG_40MHZ)
+		rinfo->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+	if (sta->last_rx_rate_flag & RX_FLAG_SHORT_GI)
+		rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
+	if (sta->last_rx_rate_flag & RX_FLAG_80MHZ)
+		rinfo->flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
+	if (sta->last_rx_rate_flag & RX_FLAG_80P80MHZ)
+		rinfo->flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
+	if (sta->last_rx_rate_flag & RX_FLAG_160MHZ)
+		rinfo->flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
+}
+
+static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct timespec uptime;
+	u64 packets = 0;
+	int ac;
+
+	sinfo->generation = sdata->local->sta_generation;
+
+	sinfo->filled = STATION_INFO_INACTIVE_TIME |
+			STATION_INFO_RX_BYTES64 |
+			STATION_INFO_TX_BYTES64 |
+			STATION_INFO_RX_PACKETS |
+			STATION_INFO_TX_PACKETS |
+			STATION_INFO_TX_RETRIES |
+			STATION_INFO_TX_FAILED |
+			STATION_INFO_TX_BITRATE |
+			STATION_INFO_RX_BITRATE |
+			STATION_INFO_RX_DROP_MISC |
+			STATION_INFO_BSS_PARAM |
+			STATION_INFO_CONNECTED_TIME |
+			STATION_INFO_STA_FLAGS |
+			STATION_INFO_BEACON_LOSS_COUNT;
+
+	do_posix_clock_monotonic_gettime(&uptime);
+	sinfo->connected_time = uptime.tv_sec - sta->last_connected;
+
+	sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
+	sinfo->tx_bytes = 0;
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		sinfo->tx_bytes += sta->tx_bytes[ac];
+		packets += sta->tx_packets[ac];
+	}
+	sinfo->tx_packets = packets;
+	sinfo->rx_bytes = sta->rx_bytes;
+	sinfo->rx_packets = sta->rx_packets;
+	sinfo->tx_retries = sta->tx_retry_count;
+	sinfo->tx_failed = sta->tx_retry_failed;
+	sinfo->rx_dropped_misc = sta->rx_dropped;
+	sinfo->beacon_loss_count = sta->beacon_loss_count;
+
+	if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) ||
+	    (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) {
+		sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG;
+		if (!local->ops->get_rssi ||
+		    drv_get_rssi(local, sdata, &sta->sta, &sinfo->signal))
+			sinfo->signal = (s8)sta->last_signal;
+		sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
+	}
+
+	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
+	sta_set_rate_info_rx(sta, &sinfo->rxrate);
+
+	if (ieee80211_vif_is_mesh(&sdata->vif)) {
+#ifdef CPTCFG_MAC80211_MESH
+		sinfo->filled |= STATION_INFO_LLID |
+				 STATION_INFO_PLID |
+				 STATION_INFO_PLINK_STATE |
+				 STATION_INFO_LOCAL_PM |
+				 STATION_INFO_PEER_PM |
+				 STATION_INFO_NONPEER_PM;
+
+		sinfo->llid = le16_to_cpu(sta->llid);
+		sinfo->plid = le16_to_cpu(sta->plid);
+		sinfo->plink_state = sta->plink_state;
+		if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
+			sinfo->filled |= STATION_INFO_T_OFFSET;
+			sinfo->t_offset = sta->t_offset;
+		}
+		sinfo->local_pm = sta->local_pm;
+		sinfo->peer_pm = sta->peer_pm;
+		sinfo->nonpeer_pm = sta->nonpeer_pm;
+#endif
+	}
+
+	sinfo->bss_param.flags = 0;
+	if (sdata->vif.bss_conf.use_cts_prot)
+		sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
+	if (sdata->vif.bss_conf.use_short_preamble)
+		sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
+	if (sdata->vif.bss_conf.use_short_slot)
+		sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
+	sinfo->bss_param.dtim_period = sdata->local->hw.conf.ps_dtim_period;
+	sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
+
+	sinfo->sta_flags.set = 0;
+	sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
+				BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
+				BIT(NL80211_STA_FLAG_WME) |
+				BIT(NL80211_STA_FLAG_MFP) |
+				BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+				BIT(NL80211_STA_FLAG_ASSOCIATED) |
+				BIT(NL80211_STA_FLAG_TDLS_PEER);
+	if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
+	if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
+	if (test_sta_flag(sta, WLAN_STA_WME))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
+	if (test_sta_flag(sta, WLAN_STA_MFP))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
+	if (test_sta_flag(sta, WLAN_STA_AUTH))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
+	if (test_sta_flag(sta, WLAN_STA_ASSOC))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
+	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
+		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
+}
+
+static const char ieee80211_gstrings_sta_stats[][ETH_GSTRING_LEN] = {
+	"rx_packets", "rx_bytes", "wep_weak_iv_count",
+	"rx_duplicates", "rx_fragments", "rx_dropped",
+	"tx_packets", "tx_bytes", "tx_fragments",
+	"tx_filtered", "tx_retry_failed", "tx_retries",
+	"beacon_loss", "sta_state", "txrate", "rxrate", "signal",
+	"channel", "noise", "ch_time", "ch_time_busy",
+	"ch_time_ext_busy", "ch_time_rx", "ch_time_tx"
+};
+#define STA_STATS_LEN	ARRAY_SIZE(ieee80211_gstrings_sta_stats)
+
+static int ieee80211_get_et_sset_count(struct wiphy *wiphy,
+				       struct net_device *dev,
+				       int sset)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int rv = 0;
+
+	if (sset == ETH_SS_STATS)
+		rv += STA_STATS_LEN;
+
+	rv += drv_get_et_sset_count(sdata, sset);
+
+	if (rv == 0)
+		return -EOPNOTSUPP;
+	return rv;
+}
+
+static void ieee80211_get_et_stats(struct wiphy *wiphy,
+				   struct net_device *dev,
+				   struct ethtool_stats *stats,
+				   u64 *data)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *channel;
+	struct sta_info *sta;
+	struct ieee80211_local *local = sdata->local;
+	struct station_info sinfo;
+	struct survey_info survey;
+	int i, q;
+#define STA_STATS_SURVEY_LEN 7
+
+	memset(data, 0, sizeof(u64) * STA_STATS_LEN);
+
+#define ADD_STA_STATS(sta)				\
+	do {						\
+		data[i++] += sta->rx_packets;		\
+		data[i++] += sta->rx_bytes;		\
+		data[i++] += sta->wep_weak_iv_count;	\
+		data[i++] += sta->num_duplicates;	\
+		data[i++] += sta->rx_fragments;		\
+		data[i++] += sta->rx_dropped;		\
+							\
+		data[i++] += sinfo.tx_packets;		\
+		data[i++] += sinfo.tx_bytes;		\
+		data[i++] += sta->tx_fragments;		\
+		data[i++] += sta->tx_filtered_count;	\
+		data[i++] += sta->tx_retry_failed;	\
+		data[i++] += sta->tx_retry_count;	\
+		data[i++] += sta->beacon_loss_count;	\
+	} while (0)
+
+	/* For Managed stations, find the single station based on BSSID
+	 * and use that.  For interface types, iterate through all available
+	 * stations and add stats for any station that is assigned to this
+	 * network device.
+	 */
+
+	mutex_lock(&local->sta_mtx);
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+		sta = sta_info_get_bss(sdata, sdata->u.mgd.bssid);
+
+		if (!(sta && !WARN_ON(sta->sdata->dev != dev)))
+			goto do_survey;
+
+		sinfo.filled = 0;
+		sta_set_sinfo(sta, &sinfo);
+
+		i = 0;
+		ADD_STA_STATS(sta);
+
+		data[i++] = sta->sta_state;
+
+
+		if (sinfo.filled & STATION_INFO_TX_BITRATE)
+			data[i] = 100000 *
+				cfg80211_calculate_bitrate(&sinfo.txrate);
+		i++;
+		if (sinfo.filled & STATION_INFO_RX_BITRATE)
+			data[i] = 100000 *
+				cfg80211_calculate_bitrate(&sinfo.rxrate);
+		i++;
+
+		if (sinfo.filled & STATION_INFO_SIGNAL_AVG)
+			data[i] = (u8)sinfo.signal_avg;
+		i++;
+	} else {
+		list_for_each_entry(sta, &local->sta_list, list) {
+			/* Make sure this station belongs to the proper dev */
+			if (sta->sdata->dev != dev)
+				continue;
+
+			sinfo.filled = 0;
+			sta_set_sinfo(sta, &sinfo);
+			i = 0;
+			ADD_STA_STATS(sta);
+		}
+	}
+
+do_survey:
+	i = STA_STATS_LEN - STA_STATS_SURVEY_LEN;
+	/* Get survey stats for current channel */
+	survey.filled = 0;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (chanctx_conf)
+		channel = chanctx_conf->def.chan;
+	else
+		channel = NULL;
+	rcu_read_unlock();
+
+	if (channel) {
+		q = 0;
+		do {
+			survey.filled = 0;
+			if (drv_get_survey(local, q, &survey) != 0) {
+				survey.filled = 0;
+				break;
+			}
+			q++;
+		} while (channel != survey.channel);
+	}
+
+	if (survey.filled)
+		data[i++] = survey.channel->center_freq;
+	else
+		data[i++] = 0;
+	if (survey.filled & SURVEY_INFO_NOISE_DBM)
+		data[i++] = (u8)survey.noise;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME)
+		data[i++] = survey.channel_time;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
+		data[i++] = survey.channel_time_busy;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
+		data[i++] = survey.channel_time_ext_busy;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_RX)
+		data[i++] = survey.channel_time_rx;
+	else
+		data[i++] = -1LL;
+	if (survey.filled & SURVEY_INFO_CHANNEL_TIME_TX)
+		data[i++] = survey.channel_time_tx;
+	else
+		data[i++] = -1LL;
+
+	mutex_unlock(&local->sta_mtx);
+
+	if (WARN_ON(i != STA_STATS_LEN))
+		return;
+
+	drv_get_et_stats(sdata, stats, &(data[STA_STATS_LEN]));
+}
+
+static void ieee80211_get_et_strings(struct wiphy *wiphy,
+				     struct net_device *dev,
+				     u32 sset, u8 *data)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int sz_sta_stats = 0;
+
+	if (sset == ETH_SS_STATS) {
+		sz_sta_stats = sizeof(ieee80211_gstrings_sta_stats);
+		memcpy(data, *ieee80211_gstrings_sta_stats, sz_sta_stats);
+	}
+	drv_get_et_strings(sdata, sset, &(data[sz_sta_stats]));
+}
+
+static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
+				 int idx, u8 *mac, struct station_info *sinfo)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	int ret = -ENOENT;
+
+	mutex_lock(&local->sta_mtx);
+
+	sta = sta_info_get_by_idx(sdata, idx);
+	if (sta) {
+		ret = 0;
+		memcpy(mac, sta->sta.addr, ETH_ALEN);
+		sta_set_sinfo(sta, sinfo);
+	}
+
+	mutex_unlock(&local->sta_mtx);
+
+	return ret;
+}
+
+static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
+				 int idx, struct survey_info *survey)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+
+	return drv_get_survey(local, idx, survey);
+}
+
+static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
+				 u8 *mac, struct station_info *sinfo)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	int ret = -ENOENT;
+
+	mutex_lock(&local->sta_mtx);
+
+	sta = sta_info_get_bss(sdata, mac);
+	if (sta) {
+		ret = 0;
+		sta_set_sinfo(sta, sinfo);
+	}
+
+	mutex_unlock(&local->sta_mtx);
+
+	return ret;
+}
+
+static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
+					 struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_sub_if_data *sdata;
+	int ret = 0;
+
+	if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
+		return 0;
+
+	mutex_lock(&local->iflist_mtx);
+	if (local->use_chanctx) {
+		sdata = rcu_dereference_protected(
+				local->monitor_sdata,
+				lockdep_is_held(&local->iflist_mtx));
+		if (sdata) {
+			ieee80211_vif_release_channel(sdata);
+			ret = ieee80211_vif_use_channel(sdata, chandef,
+					IEEE80211_CHANCTX_EXCLUSIVE);
+		}
+	} else if (local->open_count == local->monitors) {
+		local->_oper_chandef = *chandef;
+		ieee80211_hw_config(local, 0);
+	}
+
+	if (ret == 0)
+		local->monitor_chandef = *chandef;
+	mutex_unlock(&local->iflist_mtx);
+
+	return ret;
+}
+
+static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
+				    const u8 *resp, size_t resp_len)
+{
+	struct probe_resp *new, *old;
+
+	if (!resp || !resp_len)
+		return 1;
+
+	old = rtnl_dereference(sdata->u.ap.probe_resp);
+
+	new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
+	if (!new)
+		return -ENOMEM;
+
+	new->len = resp_len;
+	memcpy(new->data, resp, resp_len);
+
+	rcu_assign_pointer(sdata->u.ap.probe_resp, new);
+	if (old)
+		kfree_rcu(old, rcu_head);
+
+	return 0;
+}
+
+static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
+				   struct cfg80211_beacon_data *params)
+{
+	struct beacon_data *new, *old;
+	int new_head_len, new_tail_len;
+	int size, err;
+	u32 changed = BSS_CHANGED_BEACON;
+
+	old = rtnl_dereference(sdata->u.ap.beacon);
+
+	/* Need to have a beacon head if we don't have one yet */
+	if (!params->head && !old)
+		return -EINVAL;
+
+	/* new or old head? */
+	if (params->head)
+		new_head_len = params->head_len;
+	else
+		new_head_len = old->head_len;
+
+	/* new or old tail? */
+	if (params->tail || !old)
+		/* params->tail_len will be zero for !params->tail */
+		new_tail_len = params->tail_len;
+	else
+		new_tail_len = old->tail_len;
+
+	size = sizeof(*new) + new_head_len + new_tail_len;
+
+	new = kzalloc(size, GFP_KERNEL);
+	if (!new)
+		return -ENOMEM;
+
+	/* start filling the new info now */
+
+	/*
+	 * pointers go into the block we allocated,
+	 * memory is | beacon_data | head | tail |
+	 */
+	new->head = ((u8 *) new) + sizeof(*new);
+	new->tail = new->head + new_head_len;
+	new->head_len = new_head_len;
+	new->tail_len = new_tail_len;
+
+	/* copy in head */
+	if (params->head)
+		memcpy(new->head, params->head, new_head_len);
+	else
+		memcpy(new->head, old->head, new_head_len);
+
+	/* copy in optional tail */
+	if (params->tail)
+		memcpy(new->tail, params->tail, new_tail_len);
+	else
+		if (old)
+			memcpy(new->tail, old->tail, new_tail_len);
+
+	err = ieee80211_set_probe_resp(sdata, params->probe_resp,
+				       params->probe_resp_len);
+	if (err < 0)
+		return err;
+	if (err == 0)
+		changed |= BSS_CHANGED_AP_PROBE_RESP;
+
+	rcu_assign_pointer(sdata->u.ap.beacon, new);
+
+	if (old)
+		kfree_rcu(old, rcu_head);
+
+	return changed;
+}
+
+static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
+			      struct cfg80211_ap_settings *params)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct beacon_data *old;
+	struct ieee80211_sub_if_data *vlan;
+	u32 changed = BSS_CHANGED_BEACON_INT |
+		      BSS_CHANGED_BEACON_ENABLED |
+		      BSS_CHANGED_BEACON |
+		      BSS_CHANGED_SSID |
+		      BSS_CHANGED_P2P_PS;
+	int err;
+
+	old = rtnl_dereference(sdata->u.ap.beacon);
+	if (old)
+		return -EALREADY;
+
+	/* TODO: make hostapd tell us what it wants */
+	sdata->smps_mode = IEEE80211_SMPS_OFF;
+	sdata->needed_rx_chains = sdata->local->rx_chains;
+	sdata->radar_required = params->radar_required;
+
+	err = ieee80211_vif_use_channel(sdata, &params->chandef,
+					IEEE80211_CHANCTX_SHARED);
+	if (err)
+		return err;
+	ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
+
+	/*
+	 * Apply control port protocol, this allows us to
+	 * not encrypt dynamic WEP control frames.
+	 */
+	sdata->control_port_protocol = params->crypto.control_port_ethertype;
+	sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
+		vlan->control_port_protocol =
+			params->crypto.control_port_ethertype;
+		vlan->control_port_no_encrypt =
+			params->crypto.control_port_no_encrypt;
+	}
+
+	sdata->vif.bss_conf.beacon_int = params->beacon_interval;
+	sdata->vif.bss_conf.dtim_period = params->dtim_period;
+	sdata->vif.bss_conf.enable_beacon = true;
+
+	sdata->vif.bss_conf.ssid_len = params->ssid_len;
+	if (params->ssid_len)
+		memcpy(sdata->vif.bss_conf.ssid, params->ssid,
+		       params->ssid_len);
+	sdata->vif.bss_conf.hidden_ssid =
+		(params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
+
+	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
+	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
+	sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
+		params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
+	if (params->p2p_opp_ps)
+		sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
+					IEEE80211_P2P_OPPPS_ENABLE_BIT;
+
+	err = ieee80211_assign_beacon(sdata, &params->beacon);
+	if (err < 0)
+		return err;
+	changed |= err;
+
+	err = drv_start_ap(sdata->local, sdata);
+	if (err) {
+		old = rtnl_dereference(sdata->u.ap.beacon);
+		if (old)
+			kfree_rcu(old, rcu_head);
+		RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
+		return err;
+	}
+
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	netif_carrier_on(dev);
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+		netif_carrier_on(vlan->dev);
+
+	return 0;
+}
+
+static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
+				   struct cfg80211_beacon_data *params)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct beacon_data *old;
+	int err;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	old = rtnl_dereference(sdata->u.ap.beacon);
+	if (!old)
+		return -ENOENT;
+
+	err = ieee80211_assign_beacon(sdata, params);
+	if (err < 0)
+		return err;
+	ieee80211_bss_info_change_notify(sdata, err);
+	return 0;
+}
+
+static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_sub_if_data *vlan;
+	struct ieee80211_local *local = sdata->local;
+	struct beacon_data *old_beacon;
+	struct probe_resp *old_probe_resp;
+
+	old_beacon = rtnl_dereference(sdata->u.ap.beacon);
+	if (!old_beacon)
+		return -ENOENT;
+	old_probe_resp = rtnl_dereference(sdata->u.ap.probe_resp);
+
+	/* turn off carrier for this interface and dependent VLANs */
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+		netif_carrier_off(vlan->dev);
+	netif_carrier_off(dev);
+
+	/* remove beacon and probe response */
+	RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
+	RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
+	kfree_rcu(old_beacon, rcu_head);
+	if (old_probe_resp)
+		kfree_rcu(old_probe_resp, rcu_head);
+
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+		sta_info_flush_defer(vlan);
+	sta_info_flush_defer(sdata);
+	synchronize_net();
+	rcu_barrier();
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
+		sta_info_flush_cleanup(vlan);
+		ieee80211_free_keys(vlan);
+	}
+	sta_info_flush_cleanup(sdata);
+	ieee80211_free_keys(sdata);
+
+	sdata->vif.bss_conf.enable_beacon = false;
+	sdata->vif.bss_conf.ssid_len = 0;
+	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
+
+	if (sdata->wdev.cac_started) {
+		cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
+		cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
+				   GFP_KERNEL);
+	}
+
+	drv_stop_ap(sdata->local, sdata);
+
+	/* free all potentially still buffered bcast frames */
+	local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
+	skb_queue_purge(&sdata->u.ap.ps.bc_buf);
+
+	ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
+	ieee80211_vif_release_channel(sdata);
+
+	return 0;
+}
+
+/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
+struct iapp_layer2_update {
+	u8 da[ETH_ALEN];	/* broadcast */
+	u8 sa[ETH_ALEN];	/* STA addr */
+	__be16 len;		/* 6 */
+	u8 dsap;		/* 0 */
+	u8 ssap;		/* 0 */
+	u8 control;
+	u8 xid_info[3];
+} __packed;
+
+static void ieee80211_send_layer2_update(struct sta_info *sta)
+{
+	struct iapp_layer2_update *msg;
+	struct sk_buff *skb;
+
+	/* Send Level 2 Update Frame to update forwarding tables in layer 2
+	 * bridge devices */
+
+	skb = dev_alloc_skb(sizeof(*msg));
+	if (!skb)
+		return;
+	msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
+
+	/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
+	 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
+
+	eth_broadcast_addr(msg->da);
+	memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
+	msg->len = htons(6);
+	msg->dsap = 0;
+	msg->ssap = 0x01;	/* NULL LSAP, CR Bit: Response */
+	msg->control = 0xaf;	/* XID response lsb.1111F101.
+				 * F=0 (no poll command; unsolicited frame) */
+	msg->xid_info[0] = 0x81;	/* XID format identifier */
+	msg->xid_info[1] = 1;	/* LLC types/classes: Type 1 LLC */
+	msg->xid_info[2] = 0;	/* XID sender's receive window size (RW) */
+
+	skb->dev = sta->sdata->dev;
+	skb->protocol = eth_type_trans(skb, sta->sdata->dev);
+	memset(skb->cb, 0, sizeof(skb->cb));
+	netif_rx_ni(skb);
+}
+
+static int sta_apply_auth_flags(struct ieee80211_local *local,
+				struct sta_info *sta,
+				u32 mask, u32 set)
+{
+	int ret;
+
+	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
+	    set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
+	    !test_sta_flag(sta, WLAN_STA_AUTH)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
+	    set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
+	    !test_sta_flag(sta, WLAN_STA_ASSOC)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
+		if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
+			ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
+		else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
+			ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+		else
+			ret = 0;
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
+	    !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
+	    test_sta_flag(sta, WLAN_STA_ASSOC)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
+		if (ret)
+			return ret;
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
+	    !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
+	    test_sta_flag(sta, WLAN_STA_AUTH)) {
+		ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int sta_apply_parameters(struct ieee80211_local *local,
+				struct sta_info *sta,
+				struct station_parameters *params)
+{
+	int ret = 0;
+	u32 rates;
+	int i, j;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+	u32 mask, set;
+
+	sband = local->hw.wiphy->bands[band];
+
+	mask = params->sta_flags_mask;
+	set = params->sta_flags_set;
+
+	if (ieee80211_vif_is_mesh(&sdata->vif)) {
+		/*
+		 * In mesh mode, ASSOCIATED isn't part of the nl80211
+		 * API but must follow AUTHENTICATED for driver state.
+		 */
+		if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
+			mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
+		if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
+			set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
+	} else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
+		/*
+		 * TDLS -- everything follows authorized, but
+		 * only becoming authorized is possible, not
+		 * going back
+		 */
+		if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
+			set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+			       BIT(NL80211_STA_FLAG_ASSOCIATED);
+			mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+				BIT(NL80211_STA_FLAG_ASSOCIATED);
+		}
+	}
+
+	ret = sta_apply_auth_flags(local, sta, mask, set);
+	if (ret)
+		return ret;
+
+	if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
+		if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
+			set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
+		else
+			clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_WME)) {
+		if (set & BIT(NL80211_STA_FLAG_WME)) {
+			set_sta_flag(sta, WLAN_STA_WME);
+			sta->sta.wme = true;
+		} else {
+			clear_sta_flag(sta, WLAN_STA_WME);
+			sta->sta.wme = false;
+		}
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_MFP)) {
+		if (set & BIT(NL80211_STA_FLAG_MFP))
+			set_sta_flag(sta, WLAN_STA_MFP);
+		else
+			clear_sta_flag(sta, WLAN_STA_MFP);
+	}
+
+	if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
+		if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
+			set_sta_flag(sta, WLAN_STA_TDLS_PEER);
+		else
+			clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
+	}
+
+	if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
+		sta->sta.uapsd_queues = params->uapsd_queues;
+		sta->sta.max_sp = params->max_sp;
+	}
+
+	/*
+	 * cfg80211 validates this (1-2007) and allows setting the AID
+	 * only when creating a new station entry
+	 */
+	if (params->aid)
+		sta->sta.aid = params->aid;
+
+	/*
+	 * Some of the following updates would be racy if called on an
+	 * existing station, via ieee80211_change_station(). However,
+	 * all such changes are rejected by cfg80211 except for updates
+	 * changing the supported rates on an existing but not yet used
+	 * TDLS peer.
+	 */
+
+	if (params->listen_interval >= 0)
+		sta->listen_interval = params->listen_interval;
+
+	if (params->supported_rates) {
+		rates = 0;
+
+		for (i = 0; i < params->supported_rates_len; i++) {
+			int rate = (params->supported_rates[i] & 0x7f) * 5;
+			for (j = 0; j < sband->n_bitrates; j++) {
+				if (sband->bitrates[j].bitrate == rate)
+					rates |= BIT(j);
+			}
+		}
+		sta->sta.supp_rates[band] = rates;
+	}
+
+	if (params->ht_capa)
+		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
+						  params->ht_capa, sta);
+
+	if (params->vht_capa)
+		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
+						    params->vht_capa, sta);
+
+	if (ieee80211_vif_is_mesh(&sdata->vif)) {
+#ifdef CPTCFG_MAC80211_MESH
+		u32 changed = 0;
+
+		if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
+			switch (params->plink_state) {
+			case NL80211_PLINK_ESTAB:
+				if (sta->plink_state != NL80211_PLINK_ESTAB)
+					changed = mesh_plink_inc_estab_count(
+							sdata);
+				sta->plink_state = params->plink_state;
+
+				ieee80211_mps_sta_status_update(sta);
+				changed |= ieee80211_mps_set_sta_local_pm(sta,
+					      sdata->u.mesh.mshcfg.power_mode);
+				break;
+			case NL80211_PLINK_LISTEN:
+			case NL80211_PLINK_BLOCKED:
+			case NL80211_PLINK_OPN_SNT:
+			case NL80211_PLINK_OPN_RCVD:
+			case NL80211_PLINK_CNF_RCVD:
+			case NL80211_PLINK_HOLDING:
+				if (sta->plink_state == NL80211_PLINK_ESTAB)
+					changed = mesh_plink_dec_estab_count(
+							sdata);
+				sta->plink_state = params->plink_state;
+
+				ieee80211_mps_sta_status_update(sta);
+				changed |=
+				      ieee80211_mps_local_status_update(sdata);
+				break;
+			default:
+				/*  nothing  */
+				break;
+			}
+		}
+
+		switch (params->plink_action) {
+		case NL80211_PLINK_ACTION_NO_ACTION:
+			/* nothing */
+			break;
+		case NL80211_PLINK_ACTION_OPEN:
+			changed |= mesh_plink_open(sta);
+			break;
+		case NL80211_PLINK_ACTION_BLOCK:
+			changed |= mesh_plink_block(sta);
+			break;
+		}
+
+		if (params->local_pm)
+			changed |=
+			      ieee80211_mps_set_sta_local_pm(sta,
+							     params->local_pm);
+		ieee80211_bss_info_change_notify(sdata, changed);
+#endif
+	}
+
+	return 0;
+}
+
+static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
+				 u8 *mac, struct station_parameters *params)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct sta_info *sta;
+	struct ieee80211_sub_if_data *sdata;
+	int err;
+	int layer2_update;
+
+	if (params->vlan) {
+		sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
+
+		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+		    sdata->vif.type != NL80211_IFTYPE_AP)
+			return -EINVAL;
+	} else
+		sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	if (ether_addr_equal(mac, sdata->vif.addr))
+		return -EINVAL;
+
+	if (is_multicast_ether_addr(mac))
+		return -EINVAL;
+
+	sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
+	if (!sta)
+		return -ENOMEM;
+
+	/*
+	 * defaults -- if userspace wants something else we'll
+	 * change it accordingly in sta_apply_parameters()
+	 */
+	if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) {
+		sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+		sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+	}
+
+	err = sta_apply_parameters(local, sta, params);
+	if (err) {
+		sta_info_free(local, sta);
+		return err;
+	}
+
+	/*
+	 * for TDLS, rate control should be initialized only when
+	 * rates are known and station is marked authorized
+	 */
+	if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
+		rate_control_rate_init(sta);
+
+	layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+		sdata->vif.type == NL80211_IFTYPE_AP;
+
+	err = sta_info_insert_rcu(sta);
+	if (err) {
+		rcu_read_unlock();
+		return err;
+	}
+
+	if (layer2_update)
+		ieee80211_send_layer2_update(sta);
+
+	rcu_read_unlock();
+
+	return 0;
+}
+
+static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
+				 u8 *mac)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	if (mac)
+		return sta_info_destroy_addr_bss(sdata, mac);
+
+	sta_info_flush(sdata);
+	return 0;
+}
+
+static int ieee80211_change_station(struct wiphy *wiphy,
+				    struct net_device *dev, u8 *mac,
+				    struct station_parameters *params)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct sta_info *sta;
+	struct ieee80211_sub_if_data *vlansdata;
+	enum cfg80211_station_type statype;
+	int err;
+
+	mutex_lock(&local->sta_mtx);
+
+	sta = sta_info_get_bss(sdata, mac);
+	if (!sta) {
+		err = -ENOENT;
+		goto out_err;
+	}
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_MESH_POINT:
+		if (sdata->u.mesh.user_mpm)
+			statype = CFG80211_STA_MESH_PEER_USER;
+		else
+			statype = CFG80211_STA_MESH_PEER_KERNEL;
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		statype = CFG80211_STA_IBSS;
+		break;
+	case NL80211_IFTYPE_STATION:
+		if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
+			statype = CFG80211_STA_AP_STA;
+			break;
+		}
+		if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
+			statype = CFG80211_STA_TDLS_PEER_ACTIVE;
+		else
+			statype = CFG80211_STA_TDLS_PEER_SETUP;
+		break;
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_AP_VLAN:
+		statype = CFG80211_STA_AP_CLIENT;
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		goto out_err;
+	}
+
+	err = cfg80211_check_station_change(wiphy, params, statype);
+	if (err)
+		goto out_err;
+
+	if (params->vlan && params->vlan != sta->sdata->dev) {
+		bool prev_4addr = false;
+		bool new_4addr = false;
+
+		vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
+
+		if (params->vlan->ieee80211_ptr->use_4addr) {
+			if (vlansdata->u.vlan.sta) {
+				err = -EBUSY;
+				goto out_err;
+			}
+
+			rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
+			new_4addr = true;
+		}
+
+		if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+		    sta->sdata->u.vlan.sta) {
+			rcu_assign_pointer(sta->sdata->u.vlan.sta, NULL);
+			prev_4addr = true;
+		}
+
+		sta->sdata = vlansdata;
+
+		if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
+		    prev_4addr != new_4addr) {
+			if (new_4addr)
+				atomic_dec(&sta->sdata->bss->num_mcast_sta);
+			else
+				atomic_inc(&sta->sdata->bss->num_mcast_sta);
+		}
+
+		ieee80211_send_layer2_update(sta);
+	}
+
+	err = sta_apply_parameters(local, sta, params);
+	if (err)
+		goto out_err;
+
+	/* When peer becomes authorized, init rate control as well */
+	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
+	    test_sta_flag(sta, WLAN_STA_AUTHORIZED))
+		rate_control_rate_init(sta);
+
+	mutex_unlock(&local->sta_mtx);
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+	    params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
+		ieee80211_recalc_ps(local, -1);
+		ieee80211_recalc_ps_vif(sdata);
+	}
+
+	return 0;
+out_err:
+	mutex_unlock(&local->sta_mtx);
+	return err;
+}
+
+#ifdef CPTCFG_MAC80211_MESH
+static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
+				 u8 *dst, u8 *next_hop)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct mesh_path *mpath;
+	struct sta_info *sta;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, next_hop);
+	if (!sta) {
+		rcu_read_unlock();
+		return -ENOENT;
+	}
+
+	mpath = mesh_path_add(sdata, dst);
+	if (IS_ERR(mpath)) {
+		rcu_read_unlock();
+		return PTR_ERR(mpath);
+	}
+
+	mesh_path_fix_nexthop(mpath, sta);
+
+	rcu_read_unlock();
+	return 0;
+}
+
+static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
+			       u8 *dst)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	if (dst)
+		return mesh_path_del(sdata, dst);
+
+	mesh_path_flush_by_iface(sdata);
+	return 0;
+}
+
+static int ieee80211_change_mpath(struct wiphy *wiphy,
+				    struct net_device *dev,
+				    u8 *dst, u8 *next_hop)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct mesh_path *mpath;
+	struct sta_info *sta;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	rcu_read_lock();
+
+	sta = sta_info_get(sdata, next_hop);
+	if (!sta) {
+		rcu_read_unlock();
+		return -ENOENT;
+	}
+
+	mpath = mesh_path_lookup(sdata, dst);
+	if (!mpath) {
+		rcu_read_unlock();
+		return -ENOENT;
+	}
+
+	mesh_path_fix_nexthop(mpath, sta);
+
+	rcu_read_unlock();
+	return 0;
+}
+
+static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
+			    struct mpath_info *pinfo)
+{
+	struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
+
+	if (next_hop_sta)
+		memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
+	else
+		memset(next_hop, 0, ETH_ALEN);
+
+	memset(pinfo, 0, sizeof(*pinfo));
+
+	pinfo->generation = mesh_paths_generation;
+
+	pinfo->filled = MPATH_INFO_FRAME_QLEN |
+			MPATH_INFO_SN |
+			MPATH_INFO_METRIC |
+			MPATH_INFO_EXPTIME |
+			MPATH_INFO_DISCOVERY_TIMEOUT |
+			MPATH_INFO_DISCOVERY_RETRIES |
+			MPATH_INFO_FLAGS;
+
+	pinfo->frame_qlen = mpath->frame_queue.qlen;
+	pinfo->sn = mpath->sn;
+	pinfo->metric = mpath->metric;
+	if (time_before(jiffies, mpath->exp_time))
+		pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
+	pinfo->discovery_timeout =
+			jiffies_to_msecs(mpath->discovery_timeout);
+	pinfo->discovery_retries = mpath->discovery_retries;
+	if (mpath->flags & MESH_PATH_ACTIVE)
+		pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
+	if (mpath->flags & MESH_PATH_RESOLVING)
+		pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
+	if (mpath->flags & MESH_PATH_SN_VALID)
+		pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
+	if (mpath->flags & MESH_PATH_FIXED)
+		pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
+	if (mpath->flags & MESH_PATH_RESOLVED)
+		pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
+}
+
+static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
+			       u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
+
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct mesh_path *mpath;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	rcu_read_lock();
+	mpath = mesh_path_lookup(sdata, dst);
+	if (!mpath) {
+		rcu_read_unlock();
+		return -ENOENT;
+	}
+	memcpy(dst, mpath->dst, ETH_ALEN);
+	mpath_set_pinfo(mpath, next_hop, pinfo);
+	rcu_read_unlock();
+	return 0;
+}
+
+static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
+				 int idx, u8 *dst, u8 *next_hop,
+				 struct mpath_info *pinfo)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct mesh_path *mpath;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	rcu_read_lock();
+	mpath = mesh_path_lookup_by_idx(sdata, idx);
+	if (!mpath) {
+		rcu_read_unlock();
+		return -ENOENT;
+	}
+	memcpy(dst, mpath->dst, ETH_ALEN);
+	mpath_set_pinfo(mpath, next_hop, pinfo);
+	rcu_read_unlock();
+	return 0;
+}
+
+static int ieee80211_get_mesh_config(struct wiphy *wiphy,
+				struct net_device *dev,
+				struct mesh_config *conf)
+{
+	struct ieee80211_sub_if_data *sdata;
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
+	return 0;
+}
+
+static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
+{
+	return (mask >> (parm-1)) & 0x1;
+}
+
+static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
+		const struct mesh_setup *setup)
+{
+	u8 *new_ie;
+	const u8 *old_ie;
+	struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
+					struct ieee80211_sub_if_data, u.mesh);
+
+	/* allocate information elements */
+	new_ie = NULL;
+	old_ie = ifmsh->ie;
+
+	if (setup->ie_len) {
+		new_ie = kmemdup(setup->ie, setup->ie_len,
+				GFP_KERNEL);
+		if (!new_ie)
+			return -ENOMEM;
+	}
+	ifmsh->ie_len = setup->ie_len;
+	ifmsh->ie = new_ie;
+	kfree(old_ie);
+
+	/* now copy the rest of the setup parameters */
+	ifmsh->mesh_id_len = setup->mesh_id_len;
+	memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
+	ifmsh->mesh_sp_id = setup->sync_method;
+	ifmsh->mesh_pp_id = setup->path_sel_proto;
+	ifmsh->mesh_pm_id = setup->path_metric;
+	ifmsh->user_mpm = setup->user_mpm;
+	ifmsh->security = IEEE80211_MESH_SEC_NONE;
+	if (setup->is_authenticated)
+		ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
+	if (setup->is_secure)
+		ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
+
+	/* mcast rate setting in Mesh Node */
+	memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
+						sizeof(setup->mcast_rate));
+
+	sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
+	sdata->vif.bss_conf.dtim_period = setup->dtim_period;
+
+	return 0;
+}
+
+static int ieee80211_update_mesh_config(struct wiphy *wiphy,
+					struct net_device *dev, u32 mask,
+					const struct mesh_config *nconf)
+{
+	struct mesh_config *conf;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_if_mesh *ifmsh;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	ifmsh = &sdata->u.mesh;
+
+	/* Set the config options which we are interested in setting */
+	conf = &(sdata->u.mesh.mshcfg);
+	if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
+		conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
+	if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
+		conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
+		conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
+	if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
+		conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
+	if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
+		conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
+	if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
+		conf->dot11MeshTTL = nconf->dot11MeshTTL;
+	if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
+		conf->element_ttl = nconf->element_ttl;
+	if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
+		if (ifmsh->user_mpm)
+			return -EBUSY;
+		conf->auto_open_plinks = nconf->auto_open_plinks;
+	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
+		conf->dot11MeshNbrOffsetMaxNeighbor =
+			nconf->dot11MeshNbrOffsetMaxNeighbor;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
+		conf->dot11MeshHWMPmaxPREQretries =
+			nconf->dot11MeshHWMPmaxPREQretries;
+	if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
+		conf->path_refresh_time = nconf->path_refresh_time;
+	if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
+		conf->min_discovery_timeout = nconf->min_discovery_timeout;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
+		conf->dot11MeshHWMPactivePathTimeout =
+			nconf->dot11MeshHWMPactivePathTimeout;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
+		conf->dot11MeshHWMPpreqMinInterval =
+			nconf->dot11MeshHWMPpreqMinInterval;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
+		conf->dot11MeshHWMPperrMinInterval =
+			nconf->dot11MeshHWMPperrMinInterval;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
+			   mask))
+		conf->dot11MeshHWMPnetDiameterTraversalTime =
+			nconf->dot11MeshHWMPnetDiameterTraversalTime;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
+		conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
+		ieee80211_mesh_root_setup(ifmsh);
+	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
+		/* our current gate announcement implementation rides on root
+		 * announcements, so require this ifmsh to also be a root node
+		 * */
+		if (nconf->dot11MeshGateAnnouncementProtocol &&
+		    !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
+			conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
+			ieee80211_mesh_root_setup(ifmsh);
+		}
+		conf->dot11MeshGateAnnouncementProtocol =
+			nconf->dot11MeshGateAnnouncementProtocol;
+	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
+		conf->dot11MeshHWMPRannInterval =
+			nconf->dot11MeshHWMPRannInterval;
+	if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
+		conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
+	if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
+		/* our RSSI threshold implementation is supported only for
+		 * devices that report signal in dBm.
+		 */
+		if (!(sdata->local->hw.flags & IEEE80211_HW_SIGNAL_DBM))
+			return -ENOTSUPP;
+		conf->rssi_threshold = nconf->rssi_threshold;
+	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
+		conf->ht_opmode = nconf->ht_opmode;
+		sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
+	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
+		conf->dot11MeshHWMPactivePathToRootTimeout =
+			nconf->dot11MeshHWMPactivePathToRootTimeout;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
+		conf->dot11MeshHWMProotInterval =
+			nconf->dot11MeshHWMProotInterval;
+	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
+		conf->dot11MeshHWMPconfirmationInterval =
+			nconf->dot11MeshHWMPconfirmationInterval;
+	if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
+		conf->power_mode = nconf->power_mode;
+		ieee80211_mps_local_status_update(sdata);
+	}
+	if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
+		conf->dot11MeshAwakeWindowDuration =
+			nconf->dot11MeshAwakeWindowDuration;
+	ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+	return 0;
+}
+
+static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
+			       const struct mesh_config *conf,
+			       const struct mesh_setup *setup)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	int err;
+
+	memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
+	err = copy_mesh_setup(ifmsh, setup);
+	if (err)
+		return err;
+
+	/* can mesh use other SMPS modes? */
+	sdata->smps_mode = IEEE80211_SMPS_OFF;
+	sdata->needed_rx_chains = sdata->local->rx_chains;
+
+	err = ieee80211_vif_use_channel(sdata, &setup->chandef,
+					IEEE80211_CHANCTX_SHARED);
+	if (err)
+		return err;
+
+	return ieee80211_start_mesh(sdata);
+}
+
+static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	ieee80211_stop_mesh(sdata);
+	ieee80211_vif_release_channel(sdata);
+
+	return 0;
+}
+#endif
+
+static int ieee80211_change_bss(struct wiphy *wiphy,
+				struct net_device *dev,
+				struct bss_parameters *params)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	enum ieee80211_band band;
+	u32 changed = 0;
+
+	if (!rtnl_dereference(sdata->u.ap.beacon))
+		return -ENOENT;
+
+	band = ieee80211_get_sdata_band(sdata);
+
+	if (params->use_cts_prot >= 0) {
+		sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
+		changed |= BSS_CHANGED_ERP_CTS_PROT;
+	}
+	if (params->use_short_preamble >= 0) {
+		sdata->vif.bss_conf.use_short_preamble =
+			params->use_short_preamble;
+		changed |= BSS_CHANGED_ERP_PREAMBLE;
+	}
+
+	if (!sdata->vif.bss_conf.use_short_slot &&
+	    band == IEEE80211_BAND_5GHZ) {
+		sdata->vif.bss_conf.use_short_slot = true;
+		changed |= BSS_CHANGED_ERP_SLOT;
+	}
+
+	if (params->use_short_slot_time >= 0) {
+		sdata->vif.bss_conf.use_short_slot =
+			params->use_short_slot_time;
+		changed |= BSS_CHANGED_ERP_SLOT;
+	}
+
+	if (params->basic_rates) {
+		int i, j;
+		u32 rates = 0;
+		struct ieee80211_supported_band *sband = wiphy->bands[band];
+
+		for (i = 0; i < params->basic_rates_len; i++) {
+			int rate = (params->basic_rates[i] & 0x7f) * 5;
+			for (j = 0; j < sband->n_bitrates; j++) {
+				if (sband->bitrates[j].bitrate == rate)
+					rates |= BIT(j);
+			}
+		}
+		sdata->vif.bss_conf.basic_rates = rates;
+		changed |= BSS_CHANGED_BASIC_RATES;
+	}
+
+	if (params->ap_isolate >= 0) {
+		if (params->ap_isolate)
+			sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
+		else
+			sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
+	}
+
+	if (params->ht_opmode >= 0) {
+		sdata->vif.bss_conf.ht_operation_mode =
+			(u16) params->ht_opmode;
+		changed |= BSS_CHANGED_HT;
+	}
+
+	if (params->p2p_ctwindow >= 0) {
+		sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
+					~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
+		sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
+			params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
+		changed |= BSS_CHANGED_P2P_PS;
+	}
+
+	if (params->p2p_opp_ps > 0) {
+		sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
+					IEEE80211_P2P_OPPPS_ENABLE_BIT;
+		changed |= BSS_CHANGED_P2P_PS;
+	} else if (params->p2p_opp_ps == 0) {
+		sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
+					~IEEE80211_P2P_OPPPS_ENABLE_BIT;
+		changed |= BSS_CHANGED_P2P_PS;
+	}
+
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	return 0;
+}
+
+static int ieee80211_set_txq_params(struct wiphy *wiphy,
+				    struct net_device *dev,
+				    struct ieee80211_txq_params *params)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_tx_queue_params p;
+
+	if (!local->ops->conf_tx)
+		return -EOPNOTSUPP;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return -EOPNOTSUPP;
+
+	memset(&p, 0, sizeof(p));
+	p.aifs = params->aifs;
+	p.cw_max = params->cwmax;
+	p.cw_min = params->cwmin;
+	p.txop = params->txop;
+
+	/*
+	 * Setting tx queue params disables u-apsd because it's only
+	 * called in master mode.
+	 */
+	p.uapsd = false;
+
+	sdata->tx_conf[params->ac] = p;
+	if (drv_conf_tx(local, sdata, params->ac, &p)) {
+		wiphy_debug(local->hw.wiphy,
+			    "failed to set TX queue parameters for AC %d\n",
+			    params->ac);
+		return -EINVAL;
+	}
+
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int ieee80211_suspend(struct wiphy *wiphy,
+			     struct cfg80211_wowlan *wowlan)
+{
+	return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
+}
+
+static int ieee80211_resume(struct wiphy *wiphy)
+{
+	return __ieee80211_resume(wiphy_priv(wiphy));
+}
+#else
+#define ieee80211_suspend NULL
+#define ieee80211_resume NULL
+#endif
+
+static int ieee80211_scan(struct wiphy *wiphy,
+			  struct cfg80211_scan_request *req)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
+
+	switch (ieee80211_vif_type_p2p(&sdata->vif)) {
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_ADHOC:
+	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_P2P_DEVICE:
+		break;
+	case NL80211_IFTYPE_P2P_GO:
+		if (sdata->local->ops->hw_scan)
+			break;
+		/*
+		 * FIXME: implement NoA while scanning in software,
+		 * for now fall through to allow scanning only when
+		 * beaconing hasn't been configured yet
+		 */
+	case NL80211_IFTYPE_AP:
+		/*
+		 * If the scan has been forced (and the driver supports
+		 * forcing), don't care about being beaconing already.
+		 * This will create problems to the attached stations (e.g. all
+		 * the  frames sent while scanning on other channel will be
+		 * lost)
+		 */
+		if (sdata->u.ap.beacon &&
+		    (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
+		     !(req->flags & NL80211_SCAN_FLAG_AP)))
+			return -EOPNOTSUPP;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return ieee80211_request_scan(sdata, req);
+}
+
+static int
+ieee80211_sched_scan_start(struct wiphy *wiphy,
+			   struct net_device *dev,
+			   struct cfg80211_sched_scan_request *req)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	if (!sdata->local->ops->sched_scan_start)
+		return -EOPNOTSUPP;
+
+	return ieee80211_request_sched_scan_start(sdata, req);
+}
+
+static int
+ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	if (!sdata->local->ops->sched_scan_stop)
+		return -EOPNOTSUPP;
+
+	return ieee80211_request_sched_scan_stop(sdata);
+}
+
+static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
+			  struct cfg80211_auth_request *req)
+{
+	return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
+}
+
+static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
+			   struct cfg80211_assoc_request *req)
+{
+	return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
+}
+
+static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
+			    struct cfg80211_deauth_request *req)
+{
+	return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
+}
+
+static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
+			      struct cfg80211_disassoc_request *req)
+{
+	return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
+}
+
+static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
+			       struct cfg80211_ibss_params *params)
+{
+	return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
+}
+
+static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
+{
+	return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
+}
+
+static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
+				    int rate[IEEE80211_NUM_BANDS])
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	memcpy(sdata->vif.bss_conf.mcast_rate, rate,
+	       sizeof(int) * IEEE80211_NUM_BANDS);
+
+	return 0;
+}
+
+static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	int err;
+
+	if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
+		err = drv_set_frag_threshold(local, wiphy->frag_threshold);
+
+		if (err)
+			return err;
+	}
+
+	if (changed & WIPHY_PARAM_COVERAGE_CLASS) {
+		err = drv_set_coverage_class(local, wiphy->coverage_class);
+
+		if (err)
+			return err;
+	}
+
+	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
+		err = drv_set_rts_threshold(local, wiphy->rts_threshold);
+
+		if (err)
+			return err;
+	}
+
+	if (changed & WIPHY_PARAM_RETRY_SHORT) {
+		if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
+			return -EINVAL;
+		local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
+	}
+	if (changed & WIPHY_PARAM_RETRY_LONG) {
+		if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
+			return -EINVAL;
+		local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
+	}
+	if (changed &
+	    (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
+
+	return 0;
+}
+
+static int ieee80211_set_tx_power(struct wiphy *wiphy,
+				  struct wireless_dev *wdev,
+				  enum nl80211_tx_power_setting type, int mbm)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_sub_if_data *sdata;
+
+	if (wdev) {
+		sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+
+		switch (type) {
+		case NL80211_TX_POWER_AUTOMATIC:
+			sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
+			break;
+		case NL80211_TX_POWER_LIMITED:
+		case NL80211_TX_POWER_FIXED:
+			if (mbm < 0 || (mbm % 100))
+				return -EOPNOTSUPP;
+			sdata->user_power_level = MBM_TO_DBM(mbm);
+			break;
+		}
+
+		ieee80211_recalc_txpower(sdata);
+
+		return 0;
+	}
+
+	switch (type) {
+	case NL80211_TX_POWER_AUTOMATIC:
+		local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
+		break;
+	case NL80211_TX_POWER_LIMITED:
+	case NL80211_TX_POWER_FIXED:
+		if (mbm < 0 || (mbm % 100))
+			return -EOPNOTSUPP;
+		local->user_power_level = MBM_TO_DBM(mbm);
+		break;
+	}
+
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(sdata, &local->interfaces, list)
+		sdata->user_power_level = local->user_power_level;
+	list_for_each_entry(sdata, &local->interfaces, list)
+		ieee80211_recalc_txpower(sdata);
+	mutex_unlock(&local->iflist_mtx);
+
+	return 0;
+}
+
+static int ieee80211_get_tx_power(struct wiphy *wiphy,
+				  struct wireless_dev *wdev,
+				  int *dbm)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+
+	if (!local->use_chanctx)
+		*dbm = local->hw.conf.power_level;
+	else
+		*dbm = sdata->vif.bss_conf.txpower;
+
+	return 0;
+}
+
+static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
+				  const u8 *addr)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
+
+	return 0;
+}
+
+static void ieee80211_rfkill_poll(struct wiphy *wiphy)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	drv_rfkill_poll(local);
+}
+
+#ifdef CPTCFG_NL80211_TESTMODE
+static int ieee80211_testmode_cmd(struct wiphy *wiphy, void *data, int len)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	if (!local->ops->testmode_cmd)
+		return -EOPNOTSUPP;
+
+	return local->ops->testmode_cmd(&local->hw, data, len);
+}
+
+static int ieee80211_testmode_dump(struct wiphy *wiphy,
+				   struct sk_buff *skb,
+				   struct netlink_callback *cb,
+				   void *data, int len)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	if (!local->ops->testmode_dump)
+		return -EOPNOTSUPP;
+
+	return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
+}
+#endif
+
+int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
+			     enum ieee80211_smps_mode smps_mode)
+{
+	const u8 *ap;
+	enum ieee80211_smps_mode old_req;
+	int err;
+
+	lockdep_assert_held(&sdata->u.mgd.mtx);
+
+	old_req = sdata->u.mgd.req_smps;
+	sdata->u.mgd.req_smps = smps_mode;
+
+	if (old_req == smps_mode &&
+	    smps_mode != IEEE80211_SMPS_AUTOMATIC)
+		return 0;
+
+	/*
+	 * If not associated, or current association is not an HT
+	 * association, there's no need to do anything, just store
+	 * the new value until we associate.
+	 */
+	if (!sdata->u.mgd.associated ||
+	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
+		return 0;
+
+	ap = sdata->u.mgd.associated->bssid;
+
+	if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
+		if (sdata->u.mgd.powersave)
+			smps_mode = IEEE80211_SMPS_DYNAMIC;
+		else
+			smps_mode = IEEE80211_SMPS_OFF;
+	}
+
+	/* send SM PS frame to AP */
+	err = ieee80211_send_smps_action(sdata, smps_mode,
+					 ap, ap);
+	if (err)
+		sdata->u.mgd.req_smps = old_req;
+
+	return err;
+}
+
+static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
+				    bool enabled, int timeout)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+
+	if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+	    sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
+		return -EOPNOTSUPP;
+
+	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
+		return -EOPNOTSUPP;
+
+	if (enabled == sdata->u.mgd.powersave &&
+	    timeout == local->dynamic_ps_forced_timeout)
+		return 0;
+
+	sdata->u.mgd.powersave = enabled;
+	local->dynamic_ps_forced_timeout = timeout;
+
+	/* no change, but if automatic follow powersave */
+	mutex_lock(&sdata->u.mgd.mtx);
+	__ieee80211_request_smps(sdata, sdata->u.mgd.req_smps);
+	mutex_unlock(&sdata->u.mgd.mtx);
+
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+
+	ieee80211_recalc_ps(local, -1);
+	ieee80211_recalc_ps_vif(sdata);
+
+	return 0;
+}
+
+static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
+					 struct net_device *dev,
+					 s32 rssi_thold, u32 rssi_hyst)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_vif *vif = &sdata->vif;
+	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+
+	if (rssi_thold == bss_conf->cqm_rssi_thold &&
+	    rssi_hyst == bss_conf->cqm_rssi_hyst)
+		return 0;
+
+	bss_conf->cqm_rssi_thold = rssi_thold;
+	bss_conf->cqm_rssi_hyst = rssi_hyst;
+
+	/* tell the driver upon association, unless already associated */
+	if (sdata->u.mgd.associated &&
+	    sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
+
+	return 0;
+}
+
+static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
+				      struct net_device *dev,
+				      const u8 *addr,
+				      const struct cfg80211_bitrate_mask *mask)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	int i, ret;
+
+	if (!ieee80211_sdata_running(sdata))
+		return -ENETDOWN;
+
+	if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) {
+		ret = drv_set_bitrate_mask(local, sdata, mask);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+		struct ieee80211_supported_band *sband = wiphy->bands[i];
+		int j;
+
+		sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
+		memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].mcs,
+		       sizeof(mask->control[i].mcs));
+
+		sdata->rc_has_mcs_mask[i] = false;
+		if (!sband)
+			continue;
+
+		for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++)
+			if (~sdata->rc_rateidx_mcs_mask[i][j]) {
+				sdata->rc_has_mcs_mask[i] = true;
+				break;
+			}
+	}
+
+	return 0;
+}
+
+static int ieee80211_start_roc_work(struct ieee80211_local *local,
+				    struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_channel *channel,
+				    unsigned int duration, u64 *cookie,
+				    struct sk_buff *txskb,
+				    enum ieee80211_roc_type type)
+{
+	struct ieee80211_roc_work *roc, *tmp;
+	bool queued = false;
+	int ret;
+
+	lockdep_assert_held(&local->mtx);
+
+	if (local->use_chanctx && !local->ops->remain_on_channel)
+		return -EOPNOTSUPP;
+
+	roc = kzalloc(sizeof(*roc), GFP_KERNEL);
+	if (!roc)
+		return -ENOMEM;
+
+	roc->chan = channel;
+	roc->duration = duration;
+	roc->req_duration = duration;
+	roc->frame = txskb;
+	roc->type = type;
+	roc->mgmt_tx_cookie = (unsigned long)txskb;
+	roc->sdata = sdata;
+	INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
+	INIT_LIST_HEAD(&roc->dependents);
+
+	/* if there's one pending or we're scanning, queue this one */
+	if (!list_empty(&local->roc_list) ||
+	    local->scanning || local->radar_detect_enabled)
+		goto out_check_combine;
+
+	/* if not HW assist, just queue & schedule work */
+	if (!local->ops->remain_on_channel) {
+		ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
+		goto out_queue;
+	}
+
+	/* otherwise actually kick it off here (for error handling) */
+
+	/*
+	 * If the duration is zero, then the driver
+	 * wouldn't actually do anything. Set it to
+	 * 10 for now.
+	 *
+	 * TODO: cancel the off-channel operation
+	 *       when we get the SKB's TX status and
+	 *       the wait time was zero before.
+	 */
+	if (!duration)
+		duration = 10;
+
+	ret = drv_remain_on_channel(local, sdata, channel, duration, type);
+	if (ret) {
+		kfree(roc);
+		return ret;
+	}
+
+	roc->started = true;
+	goto out_queue;
+
+ out_check_combine:
+	list_for_each_entry(tmp, &local->roc_list, list) {
+		if (tmp->chan != channel || tmp->sdata != sdata)
+			continue;
+
+		/*
+		 * Extend this ROC if possible:
+		 *
+		 * If it hasn't started yet, just increase the duration
+		 * and add the new one to the list of dependents.
+		 * If the type of the new ROC has higher priority, modify the
+		 * type of the previous one to match that of the new one.
+		 */
+		if (!tmp->started) {
+			list_add_tail(&roc->list, &tmp->dependents);
+			tmp->duration = max(tmp->duration, roc->duration);
+			tmp->type = max(tmp->type, roc->type);
+			queued = true;
+			break;
+		}
+
+		/* If it has already started, it's more difficult ... */
+		if (local->ops->remain_on_channel) {
+			unsigned long j = jiffies;
+
+			/*
+			 * In the offloaded ROC case, if it hasn't begun, add
+			 * this new one to the dependent list to be handled
+			 * when the master one begins. If it has begun,
+			 * check that there's still a minimum time left and
+			 * if so, start this one, transmitting the frame, but
+			 * add it to the list directly after this one with
+			 * a reduced time so we'll ask the driver to execute
+			 * it right after finishing the previous one, in the
+			 * hope that it'll also be executed right afterwards,
+			 * effectively extending the old one.
+			 * If there's no minimum time left, just add it to the
+			 * normal list.
+			 * TODO: the ROC type is ignored here, assuming that it
+			 * is better to immediately use the current ROC.
+			 */
+			if (!tmp->hw_begun) {
+				list_add_tail(&roc->list, &tmp->dependents);
+				queued = true;
+				break;
+			}
+
+			if (time_before(j + IEEE80211_ROC_MIN_LEFT,
+					tmp->hw_start_time +
+					msecs_to_jiffies(tmp->duration))) {
+				int new_dur;
+
+				ieee80211_handle_roc_started(roc);
+
+				new_dur = roc->duration -
+					  jiffies_to_msecs(tmp->hw_start_time +
+							   msecs_to_jiffies(
+								tmp->duration) -
+							   j);
+
+				if (new_dur > 0) {
+					/* add right after tmp */
+					list_add(&roc->list, &tmp->list);
+				} else {
+					list_add_tail(&roc->list,
+						      &tmp->dependents);
+				}
+				queued = true;
+			}
+		} else if (del_timer_sync(&tmp->work.timer)) {
+			unsigned long new_end;
+
+			/*
+			 * In the software ROC case, cancel the timer, if
+			 * that fails then the finish work is already
+			 * queued/pending and thus we queue the new ROC
+			 * normally, if that succeeds then we can extend
+			 * the timer duration and TX the frame (if any.)
+			 */
+
+			list_add_tail(&roc->list, &tmp->dependents);
+			queued = true;
+
+			new_end = jiffies + msecs_to_jiffies(roc->duration);
+
+			/* ok, it was started & we canceled timer */
+			if (time_after(new_end, tmp->work.timer.expires))
+				mod_timer(&tmp->work.timer, new_end);
+			else
+				add_timer(&tmp->work.timer);
+
+			ieee80211_handle_roc_started(roc);
+		}
+		break;
+	}
+
+ out_queue:
+	if (!queued)
+		list_add_tail(&roc->list, &local->roc_list);
+
+	/*
+	 * cookie is either the roc cookie (for normal roc)
+	 * or the SKB (for mgmt TX)
+	 */
+	if (!txskb) {
+		/* local->mtx protects this */
+		local->roc_cookie_counter++;
+		roc->cookie = local->roc_cookie_counter;
+		/* wow, you wrapped 64 bits ... more likely a bug */
+		if (WARN_ON(roc->cookie == 0)) {
+			roc->cookie = 1;
+			local->roc_cookie_counter++;
+		}
+		*cookie = roc->cookie;
+	} else {
+		*cookie = (unsigned long)txskb;
+	}
+
+	return 0;
+}
+
+static int ieee80211_remain_on_channel(struct wiphy *wiphy,
+				       struct wireless_dev *wdev,
+				       struct ieee80211_channel *chan,
+				       unsigned int duration,
+				       u64 *cookie)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	struct ieee80211_local *local = sdata->local;
+	int ret;
+
+	mutex_lock(&local->mtx);
+	ret = ieee80211_start_roc_work(local, sdata, chan,
+				       duration, cookie, NULL,
+				       IEEE80211_ROC_TYPE_NORMAL);
+	mutex_unlock(&local->mtx);
+
+	return ret;
+}
+
+static int ieee80211_cancel_roc(struct ieee80211_local *local,
+				u64 cookie, bool mgmt_tx)
+{
+	struct ieee80211_roc_work *roc, *tmp, *found = NULL;
+	int ret;
+
+	mutex_lock(&local->mtx);
+	list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
+		struct ieee80211_roc_work *dep, *tmp2;
+
+		list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
+			if (!mgmt_tx && dep->cookie != cookie)
+				continue;
+			else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
+				continue;
+			/* found dependent item -- just remove it */
+			list_del(&dep->list);
+			mutex_unlock(&local->mtx);
+
+			ieee80211_roc_notify_destroy(dep, true);
+			return 0;
+		}
+
+		if (!mgmt_tx && roc->cookie != cookie)
+			continue;
+		else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
+			continue;
+
+		found = roc;
+		break;
+	}
+
+	if (!found) {
+		mutex_unlock(&local->mtx);
+		return -ENOENT;
+	}
+
+	/*
+	 * We found the item to cancel, so do that. Note that it
+	 * may have dependents, which we also cancel (and send
+	 * the expired signal for.) Not doing so would be quite
+	 * tricky here, but we may need to fix it later.
+	 */
+
+	if (local->ops->remain_on_channel) {
+		if (found->started) {
+			ret = drv_cancel_remain_on_channel(local);
+			if (WARN_ON_ONCE(ret)) {
+				mutex_unlock(&local->mtx);
+				return ret;
+			}
+		}
+
+		list_del(&found->list);
+
+		if (found->started)
+			ieee80211_start_next_roc(local);
+		mutex_unlock(&local->mtx);
+
+		ieee80211_roc_notify_destroy(found, true);
+	} else {
+		/* work may be pending so use it all the time */
+		found->abort = true;
+		ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
+
+		mutex_unlock(&local->mtx);
+
+		/* work will clean up etc */
+		flush_delayed_work(&found->work);
+		WARN_ON(!found->to_be_freed);
+		kfree(found);
+	}
+
+	return 0;
+}
+
+static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
+					      struct wireless_dev *wdev,
+					      u64 cookie)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	struct ieee80211_local *local = sdata->local;
+
+	return ieee80211_cancel_roc(local, cookie, false);
+}
+
+static int ieee80211_start_radar_detection(struct wiphy *wiphy,
+					   struct net_device *dev,
+					   struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	unsigned long timeout;
+	int err;
+
+	if (!list_empty(&local->roc_list) || local->scanning)
+		return -EBUSY;
+
+	/* whatever, but channel contexts should not complain about that one */
+	sdata->smps_mode = IEEE80211_SMPS_OFF;
+	sdata->needed_rx_chains = local->rx_chains;
+	sdata->radar_required = true;
+
+	mutex_lock(&local->iflist_mtx);
+	err = ieee80211_vif_use_channel(sdata, chandef,
+					IEEE80211_CHANCTX_SHARED);
+	mutex_unlock(&local->iflist_mtx);
+	if (err)
+		return err;
+
+	timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS);
+	ieee80211_queue_delayed_work(&sdata->local->hw,
+				     &sdata->dfs_cac_timer_work, timeout);
+
+	return 0;
+}
+
+static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
+			     struct ieee80211_channel *chan, bool offchan,
+			     unsigned int wait, const u8 *buf, size_t len,
+			     bool no_cck, bool dont_wait_for_ack, u64 *cookie)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct sta_info *sta;
+	const struct ieee80211_mgmt *mgmt = (void *)buf;
+	bool need_offchan = false;
+	u32 flags;
+	int ret;
+
+	if (dont_wait_for_ack)
+		flags = IEEE80211_TX_CTL_NO_ACK;
+	else
+		flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
+			IEEE80211_TX_CTL_REQ_TX_STATUS;
+
+	if (no_cck)
+		flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_ADHOC:
+		if (!sdata->vif.bss_conf.ibss_joined)
+			need_offchan = true;
+		/* fall through */
+#ifdef CPTCFG_MAC80211_MESH
+	case NL80211_IFTYPE_MESH_POINT:
+		if (ieee80211_vif_is_mesh(&sdata->vif) &&
+		    !sdata->u.mesh.mesh_id_len)
+			need_offchan = true;
+		/* fall through */
+#endif
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_AP_VLAN:
+	case NL80211_IFTYPE_P2P_GO:
+		if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+		    !ieee80211_vif_is_mesh(&sdata->vif) &&
+		    !rcu_access_pointer(sdata->bss->beacon))
+			need_offchan = true;
+		if (!ieee80211_is_action(mgmt->frame_control) ||
+		    mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)
+			break;
+		rcu_read_lock();
+		sta = sta_info_get(sdata, mgmt->da);
+		rcu_read_unlock();
+		if (!sta)
+			return -ENOLINK;
+		break;
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_P2P_CLIENT:
+		if (!sdata->u.mgd.associated)
+			need_offchan = true;
+		break;
+	case NL80211_IFTYPE_P2P_DEVICE:
+		need_offchan = true;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	mutex_lock(&local->mtx);
+
+	/* Check if the operating channel is the requested channel */
+	if (!need_offchan) {
+		struct ieee80211_chanctx_conf *chanctx_conf;
+
+		rcu_read_lock();
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+
+		if (chanctx_conf)
+			need_offchan = chan != chanctx_conf->def.chan;
+		else
+			need_offchan = true;
+		rcu_read_unlock();
+	}
+
+	if (need_offchan && !offchan) {
+		ret = -EBUSY;
+		goto out_unlock;
+	}
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
+	if (!skb) {
+		ret = -ENOMEM;
+		goto out_unlock;
+	}
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	memcpy(skb_put(skb, len), buf, len);
+
+	IEEE80211_SKB_CB(skb)->flags = flags;
+
+	skb->dev = sdata->dev;
+
+	if (!need_offchan) {
+		*cookie = (unsigned long) skb;
+		ieee80211_tx_skb(sdata, skb);
+		ret = 0;
+		goto out_unlock;
+	}
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
+					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
+	if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
+		IEEE80211_SKB_CB(skb)->hw_queue =
+			local->hw.offchannel_tx_hw_queue;
+
+	/* This will handle all kinds of coalescing and immediate TX */
+	ret = ieee80211_start_roc_work(local, sdata, chan,
+				       wait, cookie, skb,
+				       IEEE80211_ROC_TYPE_MGMT_TX);
+	if (ret)
+		kfree_skb(skb);
+ out_unlock:
+	mutex_unlock(&local->mtx);
+	return ret;
+}
+
+static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
+					 struct wireless_dev *wdev,
+					 u64 cookie)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	return ieee80211_cancel_roc(local, cookie, true);
+}
+
+static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
+					  struct wireless_dev *wdev,
+					  u16 frame_type, bool reg)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+
+	switch (frame_type) {
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH:
+		if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+			struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+
+			if (reg)
+				ifibss->auth_frame_registrations++;
+			else
+				ifibss->auth_frame_registrations--;
+		}
+		break;
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
+		if (reg)
+			local->probe_req_reg++;
+		else
+			local->probe_req_reg--;
+
+		if (!local->open_count)
+			break;
+
+		ieee80211_queue_work(&local->hw, &local->reconfig_filter);
+		break;
+	default:
+		break;
+	}
+}
+
+static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	if (local->started)
+		return -EOPNOTSUPP;
+
+	return drv_set_antenna(local, tx_ant, rx_ant);
+}
+
+static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	return drv_get_antenna(local, tx_ant, rx_ant);
+}
+
+static int ieee80211_set_ringparam(struct wiphy *wiphy, u32 tx, u32 rx)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	return drv_set_ringparam(local, tx, rx);
+}
+
+static void ieee80211_get_ringparam(struct wiphy *wiphy,
+				    u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	drv_get_ringparam(local, tx, tx_max, rx, rx_max);
+}
+
+static int ieee80211_set_rekey_data(struct wiphy *wiphy,
+				    struct net_device *dev,
+				    struct cfg80211_gtk_rekey_data *data)
+{
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	if (!local->ops->set_rekey_data)
+		return -EOPNOTSUPP;
+
+	drv_set_rekey_data(local, sdata, data);
+
+	return 0;
+}
+
+static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb)
+{
+	u8 *pos = (void *)skb_put(skb, 7);
+
+	*pos++ = WLAN_EID_EXT_CAPABILITY;
+	*pos++ = 5; /* len */
+	*pos++ = 0x0;
+	*pos++ = 0x0;
+	*pos++ = 0x0;
+	*pos++ = 0x0;
+	*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
+}
+
+static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	u16 capab;
+
+	capab = 0;
+	if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ)
+		return capab;
+
+	if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
+		capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
+	if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
+		capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
+
+	return capab;
+}
+
+static void ieee80211_tdls_add_link_ie(struct sk_buff *skb, u8 *src_addr,
+				       u8 *peer, u8 *bssid)
+{
+	struct ieee80211_tdls_lnkie *lnkid;
+
+	lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
+
+	lnkid->ie_type = WLAN_EID_LINK_ID;
+	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
+
+	memcpy(lnkid->bssid, bssid, ETH_ALEN);
+	memcpy(lnkid->init_sta, src_addr, ETH_ALEN);
+	memcpy(lnkid->resp_sta, peer, ETH_ALEN);
+}
+
+static int
+ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
+			       u8 *peer, u8 action_code, u8 dialog_token,
+			       u16 status_code, struct sk_buff *skb)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+	struct ieee80211_tdls_data *tf;
+
+	tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
+
+	memcpy(tf->da, peer, ETH_ALEN);
+	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
+	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
+	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
+
+	switch (action_code) {
+	case WLAN_TDLS_SETUP_REQUEST:
+		tf->category = WLAN_CATEGORY_TDLS;
+		tf->action_code = WLAN_TDLS_SETUP_REQUEST;
+
+		skb_put(skb, sizeof(tf->u.setup_req));
+		tf->u.setup_req.dialog_token = dialog_token;
+		tf->u.setup_req.capability =
+			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
+
+		ieee80211_add_srates_ie(sdata, skb, false, band);
+		ieee80211_add_ext_srates_ie(sdata, skb, false, band);
+		ieee80211_tdls_add_ext_capab(skb);
+		break;
+	case WLAN_TDLS_SETUP_RESPONSE:
+		tf->category = WLAN_CATEGORY_TDLS;
+		tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
+
+		skb_put(skb, sizeof(tf->u.setup_resp));
+		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
+		tf->u.setup_resp.dialog_token = dialog_token;
+		tf->u.setup_resp.capability =
+			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
+
+		ieee80211_add_srates_ie(sdata, skb, false, band);
+		ieee80211_add_ext_srates_ie(sdata, skb, false, band);
+		ieee80211_tdls_add_ext_capab(skb);
+		break;
+	case WLAN_TDLS_SETUP_CONFIRM:
+		tf->category = WLAN_CATEGORY_TDLS;
+		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
+
+		skb_put(skb, sizeof(tf->u.setup_cfm));
+		tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
+		tf->u.setup_cfm.dialog_token = dialog_token;
+		break;
+	case WLAN_TDLS_TEARDOWN:
+		tf->category = WLAN_CATEGORY_TDLS;
+		tf->action_code = WLAN_TDLS_TEARDOWN;
+
+		skb_put(skb, sizeof(tf->u.teardown));
+		tf->u.teardown.reason_code = cpu_to_le16(status_code);
+		break;
+	case WLAN_TDLS_DISCOVERY_REQUEST:
+		tf->category = WLAN_CATEGORY_TDLS;
+		tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
+
+		skb_put(skb, sizeof(tf->u.discover_req));
+		tf->u.discover_req.dialog_token = dialog_token;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
+ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
+			   u8 *peer, u8 action_code, u8 dialog_token,
+			   u16 status_code, struct sk_buff *skb)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+	struct ieee80211_mgmt *mgmt;
+
+	mgmt = (void *)skb_put(skb, 24);
+	memset(mgmt, 0, 24);
+	memcpy(mgmt->da, peer, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+
+	switch (action_code) {
+	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
+		skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
+		mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
+		mgmt->u.action.u.tdls_discover_resp.action_code =
+			WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
+		mgmt->u.action.u.tdls_discover_resp.dialog_token =
+			dialog_token;
+		mgmt->u.action.u.tdls_discover_resp.capability =
+			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
+
+		ieee80211_add_srates_ie(sdata, skb, false, band);
+		ieee80211_add_ext_srates_ie(sdata, skb, false, band);
+		ieee80211_tdls_add_ext_capab(skb);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
+			       u8 *peer, u8 action_code, u8 dialog_token,
+			       u16 status_code, const u8 *extra_ies,
+			       size_t extra_ies_len)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb = NULL;
+	bool send_direct;
+	int ret;
+
+	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
+		return -ENOTSUPP;
+
+	/* make sure we are in managed mode, and associated */
+	if (sdata->vif.type != NL80211_IFTYPE_STATION ||
+	    !sdata->u.mgd.associated)
+		return -EINVAL;
+
+	tdls_dbg(sdata, "TDLS mgmt action %d peer %pM\n",
+		 action_code, peer);
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom +
+			    max(sizeof(struct ieee80211_mgmt),
+				sizeof(struct ieee80211_tdls_data)) +
+			    50 + /* supported rates */
+			    7 + /* ext capab */
+			    extra_ies_len +
+			    sizeof(struct ieee80211_tdls_lnkie));
+	if (!skb)
+		return -ENOMEM;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	switch (action_code) {
+	case WLAN_TDLS_SETUP_REQUEST:
+	case WLAN_TDLS_SETUP_RESPONSE:
+	case WLAN_TDLS_SETUP_CONFIRM:
+	case WLAN_TDLS_TEARDOWN:
+	case WLAN_TDLS_DISCOVERY_REQUEST:
+		ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer,
+						     action_code, dialog_token,
+						     status_code, skb);
+		send_direct = false;
+		break;
+	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
+		ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code,
+						 dialog_token, status_code,
+						 skb);
+		send_direct = true;
+		break;
+	default:
+		ret = -ENOTSUPP;
+		break;
+	}
+
+	if (ret < 0)
+		goto fail;
+
+	if (extra_ies_len)
+		memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
+
+	/* the TDLS link IE is always added last */
+	switch (action_code) {
+	case WLAN_TDLS_SETUP_REQUEST:
+	case WLAN_TDLS_SETUP_CONFIRM:
+	case WLAN_TDLS_TEARDOWN:
+	case WLAN_TDLS_DISCOVERY_REQUEST:
+		/* we are the initiator */
+		ieee80211_tdls_add_link_ie(skb, sdata->vif.addr, peer,
+					   sdata->u.mgd.bssid);
+		break;
+	case WLAN_TDLS_SETUP_RESPONSE:
+	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
+		/* we are the responder */
+		ieee80211_tdls_add_link_ie(skb, peer, sdata->vif.addr,
+					   sdata->u.mgd.bssid);
+		break;
+	default:
+		ret = -ENOTSUPP;
+		goto fail;
+	}
+
+	if (send_direct) {
+		ieee80211_tx_skb(sdata, skb);
+		return 0;
+	}
+
+	/*
+	 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
+	 * we should default to AC_VI.
+	 */
+	switch (action_code) {
+	case WLAN_TDLS_SETUP_REQUEST:
+	case WLAN_TDLS_SETUP_RESPONSE:
+		skb_set_queue_mapping(skb, IEEE80211_AC_BK);
+		skb->priority = 2;
+		break;
+	default:
+		skb_set_queue_mapping(skb, IEEE80211_AC_VI);
+		skb->priority = 5;
+		break;
+	}
+
+	/* disable bottom halves when entering the Tx path */
+	local_bh_disable();
+	ret = ieee80211_subif_start_xmit(skb, dev);
+	local_bh_enable();
+
+	return ret;
+
+fail:
+	dev_kfree_skb(skb);
+	return ret;
+}
+
+static int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
+			       u8 *peer, enum nl80211_tdls_operation oper)
+{
+	struct sta_info *sta;
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
+		return -ENOTSUPP;
+
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return -EINVAL;
+
+	tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer);
+
+	switch (oper) {
+	case NL80211_TDLS_ENABLE_LINK:
+		rcu_read_lock();
+		sta = sta_info_get(sdata, peer);
+		if (!sta) {
+			rcu_read_unlock();
+			return -ENOLINK;
+		}
+
+		set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
+		rcu_read_unlock();
+		break;
+	case NL80211_TDLS_DISABLE_LINK:
+		return sta_info_destroy_addr(sdata, peer);
+	case NL80211_TDLS_TEARDOWN:
+	case NL80211_TDLS_SETUP:
+	case NL80211_TDLS_DISCOVERY_REQ:
+		/* We don't support in-driver setup/teardown/discovery */
+		return -ENOTSUPP;
+	default:
+		return -ENOTSUPP;
+	}
+
+	return 0;
+}
+
+static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
+				  const u8 *peer, u64 *cookie)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_qos_hdr *nullfunc;
+	struct sk_buff *skb;
+	int size = sizeof(*nullfunc);
+	__le16 fc;
+	bool qos;
+	struct ieee80211_tx_info *info;
+	struct sta_info *sta;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	enum ieee80211_band band;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+	band = chanctx_conf->def.chan->band;
+	sta = sta_info_get_bss(sdata, peer);
+	if (sta) {
+		qos = test_sta_flag(sta, WLAN_STA_WME);
+	} else {
+		rcu_read_unlock();
+		return -ENOLINK;
+	}
+
+	if (qos) {
+		fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
+				 IEEE80211_STYPE_QOS_NULLFUNC |
+				 IEEE80211_FCTL_FROMDS);
+	} else {
+		size -= 2;
+		fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
+				 IEEE80211_STYPE_NULLFUNC |
+				 IEEE80211_FCTL_FROMDS);
+	}
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
+	if (!skb) {
+		rcu_read_unlock();
+		return -ENOMEM;
+	}
+
+	skb->dev = dev;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	nullfunc = (void *) skb_put(skb, size);
+	nullfunc->frame_control = fc;
+	nullfunc->duration_id = 0;
+	memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
+	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
+	memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
+	nullfunc->seq_ctrl = 0;
+
+	info = IEEE80211_SKB_CB(skb);
+
+	info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
+		       IEEE80211_TX_INTFL_NL80211_FRAME_TX;
+
+	skb_set_queue_mapping(skb, IEEE80211_AC_VO);
+	skb->priority = 7;
+	if (qos)
+		nullfunc->qos_ctrl = cpu_to_le16(7);
+
+	local_bh_disable();
+	ieee80211_xmit(sdata, skb, band);
+	local_bh_enable();
+	rcu_read_unlock();
+
+	*cookie = (unsigned long) skb;
+	return 0;
+}
+
+static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
+				     struct wireless_dev *wdev,
+				     struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	int ret = -ENODATA;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (chanctx_conf) {
+		*chandef = chanctx_conf->def;
+		ret = 0;
+	} else if (local->open_count > 0 &&
+		   local->open_count == local->monitors &&
+		   sdata->vif.type == NL80211_IFTYPE_MONITOR) {
+		if (local->use_chanctx)
+			*chandef = local->monitor_chandef;
+		else
+			*chandef = local->_oper_chandef;
+		ret = 0;
+	}
+	rcu_read_unlock();
+
+	return ret;
+}
+
+#ifdef CONFIG_PM
+static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
+{
+	drv_set_wakeup(wiphy_priv(wiphy), enabled);
+}
+#endif
+
+struct cfg80211_ops mac80211_config_ops = {
+	.add_virtual_intf = ieee80211_add_iface,
+	.del_virtual_intf = ieee80211_del_iface,
+	.change_virtual_intf = ieee80211_change_iface,
+	.start_p2p_device = ieee80211_start_p2p_device,
+	.stop_p2p_device = ieee80211_stop_p2p_device,
+	.add_key = ieee80211_add_key,
+	.del_key = ieee80211_del_key,
+	.get_key = ieee80211_get_key,
+	.set_default_key = ieee80211_config_default_key,
+	.set_default_mgmt_key = ieee80211_config_default_mgmt_key,
+	.start_ap = ieee80211_start_ap,
+	.change_beacon = ieee80211_change_beacon,
+	.stop_ap = ieee80211_stop_ap,
+	.add_station = ieee80211_add_station,
+	.del_station = ieee80211_del_station,
+	.change_station = ieee80211_change_station,
+	.get_station = ieee80211_get_station,
+	.dump_station = ieee80211_dump_station,
+	.dump_survey = ieee80211_dump_survey,
+#ifdef CPTCFG_MAC80211_MESH
+	.add_mpath = ieee80211_add_mpath,
+	.del_mpath = ieee80211_del_mpath,
+	.change_mpath = ieee80211_change_mpath,
+	.get_mpath = ieee80211_get_mpath,
+	.dump_mpath = ieee80211_dump_mpath,
+	.update_mesh_config = ieee80211_update_mesh_config,
+	.get_mesh_config = ieee80211_get_mesh_config,
+	.join_mesh = ieee80211_join_mesh,
+	.leave_mesh = ieee80211_leave_mesh,
+#endif
+	.change_bss = ieee80211_change_bss,
+	.set_txq_params = ieee80211_set_txq_params,
+	.set_monitor_channel = ieee80211_set_monitor_channel,
+	.suspend = ieee80211_suspend,
+	.resume = ieee80211_resume,
+	.scan = ieee80211_scan,
+	.sched_scan_start = ieee80211_sched_scan_start,
+	.sched_scan_stop = ieee80211_sched_scan_stop,
+	.auth = ieee80211_auth,
+	.assoc = ieee80211_assoc,
+	.deauth = ieee80211_deauth,
+	.disassoc = ieee80211_disassoc,
+	.join_ibss = ieee80211_join_ibss,
+	.leave_ibss = ieee80211_leave_ibss,
+	.set_mcast_rate = ieee80211_set_mcast_rate,
+	.set_wiphy_params = ieee80211_set_wiphy_params,
+	.set_tx_power = ieee80211_set_tx_power,
+	.get_tx_power = ieee80211_get_tx_power,
+	.set_wds_peer = ieee80211_set_wds_peer,
+	.rfkill_poll = ieee80211_rfkill_poll,
+	CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
+	CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
+	.set_power_mgmt = ieee80211_set_power_mgmt,
+	.set_bitrate_mask = ieee80211_set_bitrate_mask,
+	.remain_on_channel = ieee80211_remain_on_channel,
+	.cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
+	.mgmt_tx = ieee80211_mgmt_tx,
+	.mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
+	.set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
+	.mgmt_frame_register = ieee80211_mgmt_frame_register,
+	.set_antenna = ieee80211_set_antenna,
+	.get_antenna = ieee80211_get_antenna,
+	.set_ringparam = ieee80211_set_ringparam,
+	.get_ringparam = ieee80211_get_ringparam,
+	.set_rekey_data = ieee80211_set_rekey_data,
+	.tdls_oper = ieee80211_tdls_oper,
+	.tdls_mgmt = ieee80211_tdls_mgmt,
+	.probe_client = ieee80211_probe_client,
+	.set_noack_map = ieee80211_set_noack_map,
+#ifdef CONFIG_PM
+	.set_wakeup = ieee80211_set_wakeup,
+#endif
+	.get_et_sset_count = ieee80211_get_et_sset_count,
+	.get_et_stats = ieee80211_get_et_stats,
+	.get_et_strings = ieee80211_get_et_strings,
+	.get_channel = ieee80211_cfg_get_channel,
+	.start_radar_detection = ieee80211_start_radar_detection,
+};
diff --git a/net/mac80211/cfg.h b/net/mac80211/cfg.h
new file mode 100644
index 0000000..7d7879f
--- /dev/null
+++ b/net/mac80211/cfg.h
@@ -0,0 +1,9 @@
+/*
+ * mac80211 configuration hooks for cfg80211
+ */
+#ifndef __CFG_H
+#define __CFG_H
+
+extern struct cfg80211_ops mac80211_config_ops;
+
+#endif /* __CFG_H */
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
new file mode 100644
index 0000000..03e8d2e
--- /dev/null
+++ b/net/mac80211/chan.c
@@ -0,0 +1,540 @@
+/*
+ * mac80211 - channel management
+ */
+
+#include <linux/nl80211.h>
+#include <linux/export.h>
+#include <linux/rtnetlink.h>
+#include <net/cfg80211.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+
+static void ieee80211_change_chanctx(struct ieee80211_local *local,
+				     struct ieee80211_chanctx *ctx,
+				     const struct cfg80211_chan_def *chandef)
+{
+	if (cfg80211_chandef_identical(&ctx->conf.def, chandef))
+		return;
+
+	WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef));
+
+	ctx->conf.def = *chandef;
+	drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH);
+
+	if (!local->use_chanctx) {
+		local->_oper_chandef = *chandef;
+		ieee80211_hw_config(local, 0);
+	}
+}
+
+static struct ieee80211_chanctx *
+ieee80211_find_chanctx(struct ieee80211_local *local,
+		       const struct cfg80211_chan_def *chandef,
+		       enum ieee80211_chanctx_mode mode)
+{
+	struct ieee80211_chanctx *ctx;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	if (mode == IEEE80211_CHANCTX_EXCLUSIVE)
+		return NULL;
+
+	list_for_each_entry(ctx, &local->chanctx_list, list) {
+		const struct cfg80211_chan_def *compat;
+
+		if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE)
+			continue;
+
+		compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef);
+		if (!compat)
+			continue;
+
+		ieee80211_change_chanctx(local, ctx, compat);
+
+		return ctx;
+	}
+
+	return NULL;
+}
+
+static bool ieee80211_is_radar_required(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (sdata->radar_required) {
+			rcu_read_unlock();
+			return true;
+		}
+	}
+	rcu_read_unlock();
+
+	return false;
+}
+
+static struct ieee80211_chanctx *
+ieee80211_new_chanctx(struct ieee80211_local *local,
+		      const struct cfg80211_chan_def *chandef,
+		      enum ieee80211_chanctx_mode mode)
+{
+	struct ieee80211_chanctx *ctx;
+	u32 changed;
+	int err;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL);
+	if (!ctx)
+		return ERR_PTR(-ENOMEM);
+
+	ctx->conf.def = *chandef;
+	ctx->conf.rx_chains_static = 1;
+	ctx->conf.rx_chains_dynamic = 1;
+	ctx->mode = mode;
+	ctx->conf.radar_enabled = ieee80211_is_radar_required(local);
+	if (!local->use_chanctx)
+		local->hw.conf.radar_enabled = ctx->conf.radar_enabled;
+
+	/* acquire mutex to prevent idle from changing */
+	mutex_lock(&local->mtx);
+	/* turn idle off *before* setting channel -- some drivers need that */
+	changed = ieee80211_idle_off(local);
+	if (changed)
+		ieee80211_hw_config(local, changed);
+
+	if (!local->use_chanctx) {
+		local->_oper_chandef = *chandef;
+		ieee80211_hw_config(local, 0);
+	} else {
+		err = drv_add_chanctx(local, ctx);
+		if (err) {
+			kfree(ctx);
+			ctx = ERR_PTR(err);
+
+			ieee80211_recalc_idle(local);
+			goto out;
+		}
+	}
+
+	/* and keep the mutex held until the new chanctx is on the list */
+	list_add_rcu(&ctx->list, &local->chanctx_list);
+
+ out:
+	mutex_unlock(&local->mtx);
+
+	return ctx;
+}
+
+static void ieee80211_free_chanctx(struct ieee80211_local *local,
+				   struct ieee80211_chanctx *ctx)
+{
+	bool check_single_channel = false;
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	WARN_ON_ONCE(ctx->refcount != 0);
+
+	if (!local->use_chanctx) {
+		struct cfg80211_chan_def *chandef = &local->_oper_chandef;
+		chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
+		chandef->center_freq1 = chandef->chan->center_freq;
+		chandef->center_freq2 = 0;
+
+		/* NOTE: Disabling radar is only valid here for
+		 * single channel context. To be sure, check it ...
+		 */
+		if (local->hw.conf.radar_enabled)
+			check_single_channel = true;
+		local->hw.conf.radar_enabled = false;
+
+		ieee80211_hw_config(local, 0);
+	} else {
+		drv_remove_chanctx(local, ctx);
+	}
+
+	list_del_rcu(&ctx->list);
+	kfree_rcu(ctx, rcu_head);
+
+	/* throw a warning if this wasn't the only channel context. */
+	WARN_ON(check_single_channel && !list_empty(&local->chanctx_list));
+
+	mutex_lock(&local->mtx);
+	ieee80211_recalc_idle(local);
+	mutex_unlock(&local->mtx);
+}
+
+static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
+					struct ieee80211_chanctx *ctx)
+{
+	struct ieee80211_local *local = sdata->local;
+	int ret;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	ret = drv_assign_vif_chanctx(local, sdata, ctx);
+	if (ret)
+		return ret;
+
+	rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf);
+	ctx->refcount++;
+
+	ieee80211_recalc_txpower(sdata);
+	sdata->vif.bss_conf.idle = false;
+
+	if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
+	    sdata->vif.type != NL80211_IFTYPE_MONITOR)
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
+
+	return 0;
+}
+
+static void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
+					      struct ieee80211_chanctx *ctx)
+{
+	struct ieee80211_chanctx_conf *conf = &ctx->conf;
+	struct ieee80211_sub_if_data *sdata;
+	const struct cfg80211_chan_def *compat = NULL;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+		if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf)
+			continue;
+
+		if (!compat)
+			compat = &sdata->vif.bss_conf.chandef;
+
+		compat = cfg80211_chandef_compatible(
+				&sdata->vif.bss_conf.chandef, compat);
+		if (!compat)
+			break;
+	}
+	rcu_read_unlock();
+
+	if (WARN_ON_ONCE(!compat))
+		return;
+
+	ieee80211_change_chanctx(local, ctx, compat);
+}
+
+static void ieee80211_unassign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
+					   struct ieee80211_chanctx *ctx)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	ctx->refcount--;
+	rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
+
+	sdata->vif.bss_conf.idle = true;
+
+	if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
+	    sdata->vif.type != NL80211_IFTYPE_MONITOR)
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
+
+	drv_unassign_vif_chanctx(local, sdata, ctx);
+
+	if (ctx->refcount > 0) {
+		ieee80211_recalc_chanctx_chantype(sdata->local, ctx);
+		ieee80211_recalc_smps_chanctx(local, ctx);
+		ieee80211_recalc_radar_chanctx(local, ctx);
+	}
+}
+
+static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *conf;
+	struct ieee80211_chanctx *ctx;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					 lockdep_is_held(&local->chanctx_mtx));
+	if (!conf)
+		return;
+
+	ctx = container_of(conf, struct ieee80211_chanctx, conf);
+
+	ieee80211_unassign_vif_chanctx(sdata, ctx);
+	if (ctx->refcount == 0)
+		ieee80211_free_chanctx(local, ctx);
+}
+
+void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
+				    struct ieee80211_chanctx *chanctx)
+{
+	bool radar_enabled;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	radar_enabled = ieee80211_is_radar_required(local);
+
+	if (radar_enabled == chanctx->conf.radar_enabled)
+		return;
+
+	chanctx->conf.radar_enabled = radar_enabled;
+	local->radar_detect_enabled = chanctx->conf.radar_enabled;
+
+	if (!local->use_chanctx) {
+		local->hw.conf.radar_enabled = chanctx->conf.radar_enabled;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+	}
+
+	drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR);
+}
+
+void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
+				   struct ieee80211_chanctx *chanctx)
+{
+	struct ieee80211_sub_if_data *sdata;
+	u8 rx_chains_static, rx_chains_dynamic;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	rx_chains_static = 1;
+	rx_chains_dynamic = 1;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		u8 needed_static, needed_dynamic;
+
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		if (rcu_access_pointer(sdata->vif.chanctx_conf) !=
+						&chanctx->conf)
+			continue;
+
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_P2P_DEVICE:
+			continue;
+		case NL80211_IFTYPE_STATION:
+			if (!sdata->u.mgd.associated)
+				continue;
+			break;
+		case NL80211_IFTYPE_AP_VLAN:
+			continue;
+		case NL80211_IFTYPE_AP:
+		case NL80211_IFTYPE_ADHOC:
+		case NL80211_IFTYPE_WDS:
+		case NL80211_IFTYPE_MESH_POINT:
+			break;
+		default:
+			WARN_ON_ONCE(1);
+		}
+
+		switch (sdata->smps_mode) {
+		default:
+			WARN_ONCE(1, "Invalid SMPS mode %d\n",
+				  sdata->smps_mode);
+			/* fall through */
+		case IEEE80211_SMPS_OFF:
+			needed_static = sdata->needed_rx_chains;
+			needed_dynamic = sdata->needed_rx_chains;
+			break;
+		case IEEE80211_SMPS_DYNAMIC:
+			needed_static = 1;
+			needed_dynamic = sdata->needed_rx_chains;
+			break;
+		case IEEE80211_SMPS_STATIC:
+			needed_static = 1;
+			needed_dynamic = 1;
+			break;
+		}
+
+		rx_chains_static = max(rx_chains_static, needed_static);
+		rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic);
+	}
+	rcu_read_unlock();
+
+	if (!local->use_chanctx) {
+		if (rx_chains_static > 1)
+			local->smps_mode = IEEE80211_SMPS_OFF;
+		else if (rx_chains_dynamic > 1)
+			local->smps_mode = IEEE80211_SMPS_DYNAMIC;
+		else
+			local->smps_mode = IEEE80211_SMPS_STATIC;
+		ieee80211_hw_config(local, 0);
+	}
+
+	if (rx_chains_static == chanctx->conf.rx_chains_static &&
+	    rx_chains_dynamic == chanctx->conf.rx_chains_dynamic)
+		return;
+
+	chanctx->conf.rx_chains_static = rx_chains_static;
+	chanctx->conf.rx_chains_dynamic = rx_chains_dynamic;
+	drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS);
+}
+
+int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
+			      const struct cfg80211_chan_def *chandef,
+			      enum ieee80211_chanctx_mode mode)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx *ctx;
+	int ret;
+
+	WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev));
+
+	mutex_lock(&local->chanctx_mtx);
+	__ieee80211_vif_release_channel(sdata);
+
+	ctx = ieee80211_find_chanctx(local, chandef, mode);
+	if (!ctx)
+		ctx = ieee80211_new_chanctx(local, chandef, mode);
+	if (IS_ERR(ctx)) {
+		ret = PTR_ERR(ctx);
+		goto out;
+	}
+
+	sdata->vif.bss_conf.chandef = *chandef;
+
+	ret = ieee80211_assign_vif_chanctx(sdata, ctx);
+	if (ret) {
+		/* if assign fails refcount stays the same */
+		if (ctx->refcount == 0)
+			ieee80211_free_chanctx(local, ctx);
+		goto out;
+	}
+
+	ieee80211_recalc_smps_chanctx(local, ctx);
+	ieee80211_recalc_radar_chanctx(local, ctx);
+ out:
+	mutex_unlock(&local->chanctx_mtx);
+	return ret;
+}
+
+int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
+				   const struct cfg80211_chan_def *chandef,
+				   u32 *changed)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *conf;
+	struct ieee80211_chanctx *ctx;
+	int ret;
+
+	if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
+				     IEEE80211_CHAN_DISABLED))
+		return -EINVAL;
+
+	mutex_lock(&local->chanctx_mtx);
+	if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) {
+		ret = 0;
+		goto out;
+	}
+
+	if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT ||
+	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					 lockdep_is_held(&local->chanctx_mtx));
+	if (!conf) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ctx = container_of(conf, struct ieee80211_chanctx, conf);
+	if (!cfg80211_chandef_compatible(&conf->def, chandef)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	sdata->vif.bss_conf.chandef = *chandef;
+
+	ieee80211_recalc_chanctx_chantype(local, ctx);
+
+	*changed |= BSS_CHANGED_BANDWIDTH;
+	ret = 0;
+ out:
+	mutex_unlock(&local->chanctx_mtx);
+	return ret;
+}
+
+void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)
+{
+	WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev));
+
+	mutex_lock(&sdata->local->chanctx_mtx);
+	__ieee80211_vif_release_channel(sdata);
+	mutex_unlock(&sdata->local->chanctx_mtx);
+}
+
+void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_sub_if_data *ap;
+	struct ieee80211_chanctx_conf *conf;
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss))
+		return;
+
+	ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
+
+	mutex_lock(&local->chanctx_mtx);
+
+	conf = rcu_dereference_protected(ap->vif.chanctx_conf,
+					 lockdep_is_held(&local->chanctx_mtx));
+	rcu_assign_pointer(sdata->vif.chanctx_conf, conf);
+	mutex_unlock(&local->chanctx_mtx);
+}
+
+void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
+					 bool clear)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_sub_if_data *vlan;
+	struct ieee80211_chanctx_conf *conf;
+
+	ASSERT_RTNL();
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP))
+		return;
+
+	mutex_lock(&local->chanctx_mtx);
+
+	/*
+	 * Check that conf exists, even when clearing this function
+	 * must be called with the AP's channel context still there
+	 * as it would otherwise cause VLANs to have an invalid
+	 * channel context pointer for a while, possibly pointing
+	 * to a channel context that has already been freed.
+	 */
+	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+				lockdep_is_held(&local->chanctx_mtx));
+	WARN_ON(!conf);
+
+	if (clear)
+		conf = NULL;
+
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+		rcu_assign_pointer(vlan->vif.chanctx_conf, conf);
+
+	mutex_unlock(&local->chanctx_mtx);
+}
+
+void ieee80211_iter_chan_contexts_atomic(
+	struct ieee80211_hw *hw,
+	void (*iter)(struct ieee80211_hw *hw,
+		     struct ieee80211_chanctx_conf *chanctx_conf,
+		     void *data),
+	void *iter_data)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_chanctx *ctx;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(ctx, &local->chanctx_list, list)
+		if (ctx->driver_present)
+			iter(hw, &ctx->conf, iter_data);
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic);
diff --git a/net/mac80211/debug.h b/net/mac80211/debug.h
new file mode 100644
index 0000000..bb7a6ff
--- /dev/null
+++ b/net/mac80211/debug.h
@@ -0,0 +1,180 @@
+#ifndef __MAC80211_DEBUG_H
+#define __MAC80211_DEBUG_H
+#include <net/cfg80211.h>
+
+#ifdef CPTCFG_MAC80211_IBSS_DEBUG
+#define MAC80211_IBSS_DEBUG 1
+#else
+#define MAC80211_IBSS_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_PS_DEBUG
+#define MAC80211_PS_DEBUG 1
+#else
+#define MAC80211_PS_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_HT_DEBUG
+#define MAC80211_HT_DEBUG 1
+#else
+#define MAC80211_HT_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_MPL_DEBUG
+#define MAC80211_MPL_DEBUG 1
+#else
+#define MAC80211_MPL_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_MPATH_DEBUG
+#define MAC80211_MPATH_DEBUG 1
+#else
+#define MAC80211_MPATH_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_MHWMP_DEBUG
+#define MAC80211_MHWMP_DEBUG 1
+#else
+#define MAC80211_MHWMP_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_MESH_SYNC_DEBUG
+#define MAC80211_MESH_SYNC_DEBUG 1
+#else
+#define MAC80211_MESH_SYNC_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_MESH_PS_DEBUG
+#define MAC80211_MESH_PS_DEBUG 1
+#else
+#define MAC80211_MESH_PS_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_TDLS_DEBUG
+#define MAC80211_TDLS_DEBUG 1
+#else
+#define MAC80211_TDLS_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_STA_DEBUG
+#define MAC80211_STA_DEBUG 1
+#else
+#define MAC80211_STA_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_MLME_DEBUG
+#define MAC80211_MLME_DEBUG 1
+#else
+#define MAC80211_MLME_DEBUG 0
+#endif
+
+#ifdef CPTCFG_MAC80211_MESSAGE_TRACING
+void __sdata_info(const char *fmt, ...) __printf(1, 2);
+void __sdata_dbg(bool print, const char *fmt, ...) __printf(2, 3);
+void __sdata_err(const char *fmt, ...) __printf(1, 2);
+void __wiphy_dbg(struct wiphy *wiphy, bool print, const char *fmt, ...)
+	__printf(3, 4);
+
+#define _sdata_info(sdata, fmt, ...)					\
+	__sdata_info("%s: " fmt, (sdata)->name, ##__VA_ARGS__)
+#define _sdata_dbg(print, sdata, fmt, ...)				\
+	__sdata_dbg(print, "%s: " fmt, (sdata)->name, ##__VA_ARGS__)
+#define _sdata_err(sdata, fmt, ...)					\
+	__sdata_err("%s: " fmt, (sdata)->name, ##__VA_ARGS__)
+#define _wiphy_dbg(print, wiphy, fmt, ...)				\
+	__wiphy_dbg(wiphy, print, fmt, ##__VA_ARGS__)
+#else
+#define _sdata_info(sdata, fmt, ...)					\
+do {									\
+	pr_info("%s: " fmt,						\
+		(sdata)->name, ##__VA_ARGS__);				\
+} while (0)
+
+#define _sdata_dbg(print, sdata, fmt, ...)				\
+do {									\
+	if (print)							\
+		pr_debug("%s: " fmt,					\
+			 (sdata)->name, ##__VA_ARGS__);			\
+} while (0)
+
+#define _sdata_err(sdata, fmt, ...)					\
+do {									\
+	pr_err("%s: " fmt,						\
+	       (sdata)->name, ##__VA_ARGS__);				\
+} while (0)
+
+#define _wiphy_dbg(print, wiphy, fmt, ...)				\
+do {									\
+	if (print)							\
+		wiphy_dbg((wiphy), fmt, ##__VA_ARGS__);			\
+} while (0)
+#endif
+
+#define sdata_info(sdata, fmt, ...)					\
+	_sdata_info(sdata, fmt, ##__VA_ARGS__)
+#define sdata_err(sdata, fmt, ...)					\
+	_sdata_err(sdata, fmt, ##__VA_ARGS__)
+#define sdata_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(1, sdata, fmt, ##__VA_ARGS__)
+
+#define ht_dbg(sdata, fmt, ...)						\
+	_sdata_dbg(MAC80211_HT_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define ht_dbg_ratelimited(sdata, fmt, ...)				\
+	_sdata_dbg(MAC80211_HT_DEBUG && net_ratelimit(),		\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define ibss_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_IBSS_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define ps_dbg(sdata, fmt, ...)						\
+	_sdata_dbg(MAC80211_PS_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define ps_dbg_hw(hw, fmt, ...)						\
+	_wiphy_dbg(MAC80211_PS_DEBUG,					\
+		   (hw)->wiphy, fmt, ##__VA_ARGS__)
+
+#define ps_dbg_ratelimited(sdata, fmt, ...)				\
+	_sdata_dbg(MAC80211_PS_DEBUG && net_ratelimit(),		\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define mpl_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_MPL_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define mpath_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_MPATH_DEBUG,				\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define mhwmp_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_MHWMP_DEBUG,				\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define msync_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_MESH_SYNC_DEBUG,				\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define mps_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_MESH_PS_DEBUG,				\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define tdls_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_TDLS_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define sta_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_STA_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define mlme_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_MLME_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#define mlme_dbg_ratelimited(sdata, fmt, ...)				\
+	_sdata_dbg(MAC80211_MLME_DEBUG && net_ratelimit(),		\
+		   sdata, fmt, ##__VA_ARGS__)
+
+#endif /* __MAC80211_DEBUG_H */
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
new file mode 100644
index 0000000..2a45cce
--- /dev/null
+++ b/net/mac80211/debugfs.c
@@ -0,0 +1,315 @@
+
+/*
+ * mac80211 debugfs for wireless PHYs
+ *
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPLv2
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/rtnetlink.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "debugfs.h"
+
+#define DEBUGFS_FORMAT_BUFFER_SIZE 100
+
+int mac80211_format_buffer(char __user *userbuf, size_t count,
+				  loff_t *ppos, char *fmt, ...)
+{
+	va_list args;
+	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
+	int res;
+
+	va_start(args, fmt);
+	res = vscnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
+}
+
+#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)			\
+static ssize_t name## _read(struct file *file, char __user *userbuf,	\
+			    size_t count, loff_t *ppos)			\
+{									\
+	struct ieee80211_local *local = file->private_data;		\
+									\
+	return mac80211_format_buffer(userbuf, count, ppos, 		\
+				      fmt "\n", ##value);		\
+}
+
+#define DEBUGFS_READONLY_FILE_OPS(name)			\
+static const struct file_operations name## _ops = {			\
+	.read = name## _read,						\
+	.open = simple_open,						\
+	.llseek = generic_file_llseek,					\
+};
+
+#define DEBUGFS_READONLY_FILE(name, fmt, value...)		\
+	DEBUGFS_READONLY_FILE_FN(name, fmt, value)		\
+	DEBUGFS_READONLY_FILE_OPS(name)
+
+#define DEBUGFS_ADD(name)						\
+	debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
+
+#define DEBUGFS_ADD_MODE(name, mode)					\
+	debugfs_create_file(#name, mode, phyd, local, &name## _ops);
+
+
+DEBUGFS_READONLY_FILE(user_power, "%d",
+		      local->user_power_level);
+DEBUGFS_READONLY_FILE(power, "%d",
+		      local->hw.conf.power_level);
+DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
+		      local->total_ps_buffered);
+DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
+		      local->wep_iv & 0xffffff);
+DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
+	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
+
+#ifdef CONFIG_PM
+static ssize_t reset_write(struct file *file, const char __user *user_buf,
+			   size_t count, loff_t *ppos)
+{
+	struct ieee80211_local *local = file->private_data;
+
+	rtnl_lock();
+	__ieee80211_suspend(&local->hw, NULL);
+	__ieee80211_resume(&local->hw);
+	rtnl_unlock();
+
+	return count;
+}
+
+static const struct file_operations reset_ops = {
+	.write = reset_write,
+	.open = simple_open,
+	.llseek = noop_llseek,
+};
+#endif
+
+static ssize_t hwflags_read(struct file *file, char __user *user_buf,
+			    size_t count, loff_t *ppos)
+{
+	struct ieee80211_local *local = file->private_data;
+	int mxln = 500;
+	ssize_t rv;
+	char *buf = kzalloc(mxln, GFP_KERNEL);
+	int sf = 0; /* how many written so far */
+
+	if (!buf)
+		return 0;
+
+	sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
+	if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
+		sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
+	if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
+		sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
+	if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
+		sf += snprintf(buf + sf, mxln - sf,
+			       "HOST_BCAST_PS_BUFFERING\n");
+	if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
+		sf += snprintf(buf + sf, mxln - sf,
+			       "2GHZ_SHORT_SLOT_INCAPABLE\n");
+	if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
+		sf += snprintf(buf + sf, mxln - sf,
+			       "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
+		sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+		sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
+	if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC)
+		sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_BEFORE_ASSOC\n");
+	if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
+		sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
+	if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
+		sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
+		sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
+	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
+		sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
+		sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
+	if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
+		sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
+		sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
+		sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
+		sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
+	if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
+		sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
+		sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
+	if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
+		sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
+	if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
+		sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
+
+	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
+	kfree(buf);
+	return rv;
+}
+
+static ssize_t queues_read(struct file *file, char __user *user_buf,
+			   size_t count, loff_t *ppos)
+{
+	struct ieee80211_local *local = file->private_data;
+	unsigned long flags;
+	char buf[IEEE80211_MAX_QUEUES * 20];
+	int q, res = 0;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	for (q = 0; q < local->hw.queues; q++)
+		res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
+				local->queue_stop_reasons[q],
+				skb_queue_len(&local->pending[q]));
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
+}
+
+DEBUGFS_READONLY_FILE_OPS(hwflags);
+DEBUGFS_READONLY_FILE_OPS(queues);
+
+/* statistics stuff */
+
+static ssize_t format_devstat_counter(struct ieee80211_local *local,
+	char __user *userbuf,
+	size_t count, loff_t *ppos,
+	int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
+			  int buflen))
+{
+	struct ieee80211_low_level_stats stats;
+	char buf[20];
+	int res;
+
+	rtnl_lock();
+	res = drv_get_stats(local, &stats);
+	rtnl_unlock();
+	if (res)
+		return res;
+	res = printvalue(&stats, buf, sizeof(buf));
+	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
+}
+
+#define DEBUGFS_DEVSTATS_FILE(name)					\
+static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
+				 char *buf, int buflen)			\
+{									\
+	return scnprintf(buf, buflen, "%u\n", stats->name);		\
+}									\
+static ssize_t stats_ ##name## _read(struct file *file,			\
+				     char __user *userbuf,		\
+				     size_t count, loff_t *ppos)	\
+{									\
+	return format_devstat_counter(file->private_data,		\
+				      userbuf,				\
+				      count,				\
+				      ppos,				\
+				      print_devstats_##name);		\
+}									\
+									\
+static const struct file_operations stats_ ##name## _ops = {		\
+	.read = stats_ ##name## _read,					\
+	.open = simple_open,						\
+	.llseek = generic_file_llseek,					\
+};
+
+#define DEBUGFS_STATS_ADD(name, field)					\
+	debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
+#define DEBUGFS_DEVSTATS_ADD(name)					\
+	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
+
+DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
+DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
+DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
+DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
+
+void debugfs_hw_add(struct ieee80211_local *local)
+{
+	struct dentry *phyd = local->hw.wiphy->debugfsdir;
+	struct dentry *statsd;
+
+	if (!phyd)
+		return;
+
+	local->debugfs.keys = debugfs_create_dir("keys", phyd);
+
+	DEBUGFS_ADD(total_ps_buffered);
+	DEBUGFS_ADD(wep_iv);
+	DEBUGFS_ADD(queues);
+#ifdef CONFIG_PM
+	DEBUGFS_ADD_MODE(reset, 0200);
+#endif
+	DEBUGFS_ADD(hwflags);
+	DEBUGFS_ADD(user_power);
+	DEBUGFS_ADD(power);
+
+	statsd = debugfs_create_dir("statistics", phyd);
+
+	/* if the dir failed, don't put all the other things into the root! */
+	if (!statsd)
+		return;
+
+	DEBUGFS_STATS_ADD(transmitted_fragment_count,
+		local->dot11TransmittedFragmentCount);
+	DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
+		local->dot11MulticastTransmittedFrameCount);
+	DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
+	DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
+	DEBUGFS_STATS_ADD(multiple_retry_count,
+		local->dot11MultipleRetryCount);
+	DEBUGFS_STATS_ADD(frame_duplicate_count,
+		local->dot11FrameDuplicateCount);
+	DEBUGFS_STATS_ADD(received_fragment_count,
+		local->dot11ReceivedFragmentCount);
+	DEBUGFS_STATS_ADD(multicast_received_frame_count,
+		local->dot11MulticastReceivedFrameCount);
+	DEBUGFS_STATS_ADD(transmitted_frame_count,
+		local->dot11TransmittedFrameCount);
+#ifdef CPTCFG_MAC80211_DEBUG_COUNTERS
+	DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
+	DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
+	DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
+		local->tx_handlers_drop_unencrypted);
+	DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
+		local->tx_handlers_drop_fragment);
+	DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
+		local->tx_handlers_drop_wep);
+	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
+		local->tx_handlers_drop_not_assoc);
+	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
+		local->tx_handlers_drop_unauth_port);
+	DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
+	DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
+	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
+		local->rx_handlers_drop_nullfunc);
+	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
+		local->rx_handlers_drop_defrag);
+	DEBUGFS_STATS_ADD(rx_handlers_drop_short,
+		local->rx_handlers_drop_short);
+	DEBUGFS_STATS_ADD(tx_expand_skb_head,
+		local->tx_expand_skb_head);
+	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
+		local->tx_expand_skb_head_cloned);
+	DEBUGFS_STATS_ADD(rx_expand_skb_head,
+		local->rx_expand_skb_head);
+	DEBUGFS_STATS_ADD(rx_expand_skb_head2,
+		local->rx_expand_skb_head2);
+	DEBUGFS_STATS_ADD(rx_handlers_fragments,
+		local->rx_handlers_fragments);
+	DEBUGFS_STATS_ADD(tx_status_drop,
+		local->tx_status_drop);
+#endif
+	DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
+	DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
+	DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
+	DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
+}
diff --git a/net/mac80211/debugfs.h b/net/mac80211/debugfs.h
new file mode 100644
index 0000000..d42a445
--- /dev/null
+++ b/net/mac80211/debugfs.h
@@ -0,0 +1,14 @@
+#ifndef __MAC80211_DEBUGFS_H
+#define __MAC80211_DEBUGFS_H
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+void debugfs_hw_add(struct ieee80211_local *local);
+int __printf(4, 5) mac80211_format_buffer(char __user *userbuf, size_t count,
+					  loff_t *ppos, char *fmt, ...);
+#else
+static inline void debugfs_hw_add(struct ieee80211_local *local)
+{
+}
+#endif
+
+#endif /* __MAC80211_DEBUGFS_H */
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
new file mode 100644
index 0000000..1521cab
--- /dev/null
+++ b/net/mac80211/debugfs_key.c
@@ -0,0 +1,365 @@
+/*
+ * Copyright 2003-2005	Devicescape Software, Inc.
+ * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kobject.h>
+#include <linux/slab.h>
+#include "ieee80211_i.h"
+#include "key.h"
+#include "debugfs.h"
+#include "debugfs_key.h"
+
+#define KEY_READ(name, prop, format_string)				\
+static ssize_t key_##name##_read(struct file *file,			\
+				 char __user *userbuf,			\
+				 size_t count, loff_t *ppos)		\
+{									\
+	struct ieee80211_key *key = file->private_data;			\
+	return mac80211_format_buffer(userbuf, count, ppos, 		\
+				      format_string, key->prop);	\
+}
+#define KEY_READ_D(name) KEY_READ(name, name, "%d\n")
+#define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")
+
+#define KEY_OPS(name)							\
+static const struct file_operations key_ ##name## _ops = {		\
+	.read = key_##name##_read,					\
+	.open = simple_open,						\
+	.llseek = generic_file_llseek,					\
+}
+
+#define KEY_FILE(name, format)						\
+		 KEY_READ_##format(name)				\
+		 KEY_OPS(name)
+
+#define KEY_CONF_READ(name, format_string)				\
+	KEY_READ(conf_##name, conf.name, format_string)
+#define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n")
+
+#define KEY_CONF_OPS(name)						\
+static const struct file_operations key_ ##name## _ops = {		\
+	.read = key_conf_##name##_read,					\
+	.open = simple_open,						\
+	.llseek = generic_file_llseek,					\
+}
+
+#define KEY_CONF_FILE(name, format)					\
+		 KEY_CONF_READ_##format(name)				\
+		 KEY_CONF_OPS(name)
+
+KEY_CONF_FILE(keylen, D);
+KEY_CONF_FILE(keyidx, D);
+KEY_CONF_FILE(hw_key_idx, D);
+KEY_FILE(flags, X);
+KEY_FILE(tx_rx_count, D);
+KEY_READ(ifindex, sdata->name, "%s\n");
+KEY_OPS(ifindex);
+
+static ssize_t key_algorithm_read(struct file *file,
+				  char __user *userbuf,
+				  size_t count, loff_t *ppos)
+{
+	char buf[15];
+	struct ieee80211_key *key = file->private_data;
+	u32 c = key->conf.cipher;
+
+	sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
+		c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
+	return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
+}
+KEY_OPS(algorithm);
+
+static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
+				size_t count, loff_t *ppos)
+{
+	u64 pn;
+	char buf[20];
+	int len;
+	struct ieee80211_key *key = file->private_data;
+
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		len = scnprintf(buf, sizeof(buf), "\n");
+		break;
+	case WLAN_CIPHER_SUITE_TKIP:
+		len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
+				key->u.tkip.tx.iv32,
+				key->u.tkip.tx.iv16);
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		pn = atomic64_read(&key->u.ccmp.tx_pn);
+		len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
+				(u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
+				(u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		pn = atomic64_read(&key->u.aes_cmac.tx_pn);
+		len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
+				(u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
+				(u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
+		break;
+	default:
+		return 0;
+	}
+	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(tx_spec);
+
+static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
+				size_t count, loff_t *ppos)
+{
+	struct ieee80211_key *key = file->private_data;
+	char buf[14*IEEE80211_NUM_TIDS+1], *p = buf;
+	int i, len;
+	const u8 *rpn;
+
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		len = scnprintf(buf, sizeof(buf), "\n");
+		break;
+	case WLAN_CIPHER_SUITE_TKIP:
+		for (i = 0; i < IEEE80211_NUM_TIDS; i++)
+			p += scnprintf(p, sizeof(buf)+buf-p,
+				       "%08x %04x\n",
+				       key->u.tkip.rx[i].iv32,
+				       key->u.tkip.rx[i].iv16);
+		len = p - buf;
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
+			rpn = key->u.ccmp.rx_pn[i];
+			p += scnprintf(p, sizeof(buf)+buf-p,
+				       "%02x%02x%02x%02x%02x%02x\n",
+				       rpn[0], rpn[1], rpn[2],
+				       rpn[3], rpn[4], rpn[5]);
+		}
+		len = p - buf;
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		rpn = key->u.aes_cmac.rx_pn;
+		p += scnprintf(p, sizeof(buf)+buf-p,
+			       "%02x%02x%02x%02x%02x%02x\n",
+			       rpn[0], rpn[1], rpn[2],
+			       rpn[3], rpn[4], rpn[5]);
+		len = p - buf;
+		break;
+	default:
+		return 0;
+	}
+	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(rx_spec);
+
+static ssize_t key_replays_read(struct file *file, char __user *userbuf,
+				size_t count, loff_t *ppos)
+{
+	struct ieee80211_key *key = file->private_data;
+	char buf[20];
+	int len;
+
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_CCMP:
+		len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		len = scnprintf(buf, sizeof(buf), "%u\n",
+				key->u.aes_cmac.replays);
+		break;
+	default:
+		return 0;
+	}
+	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(replays);
+
+static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
+				  size_t count, loff_t *ppos)
+{
+	struct ieee80211_key *key = file->private_data;
+	char buf[20];
+	int len;
+
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		len = scnprintf(buf, sizeof(buf), "%u\n",
+				key->u.aes_cmac.icverrors);
+		break;
+	default:
+		return 0;
+	}
+	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(icverrors);
+
+static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf,
+				     size_t count, loff_t *ppos)
+{
+	struct ieee80211_key *key = file->private_data;
+	char buf[20];
+	int len;
+
+	if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP)
+		return -EINVAL;
+
+	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+KEY_OPS(mic_failures);
+
+static ssize_t key_key_read(struct file *file, char __user *userbuf,
+			    size_t count, loff_t *ppos)
+{
+	struct ieee80211_key *key = file->private_data;
+	int i, bufsize = 2 * key->conf.keylen + 2;
+	char *buf = kmalloc(bufsize, GFP_KERNEL);
+	char *p = buf;
+	ssize_t res;
+
+	if (!buf)
+		return -ENOMEM;
+
+	for (i = 0; i < key->conf.keylen; i++)
+		p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
+	p += scnprintf(p, bufsize+buf-p, "\n");
+	res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+	kfree(buf);
+	return res;
+}
+KEY_OPS(key);
+
+#define DEBUGFS_ADD(name) \
+	debugfs_create_file(#name, 0400, key->debugfs.dir, \
+			    key, &key_##name##_ops);
+
+void ieee80211_debugfs_key_add(struct ieee80211_key *key)
+{
+	static int keycount;
+	char buf[100];
+	struct sta_info *sta;
+
+	if (!key->local->debugfs.keys)
+		return;
+
+	sprintf(buf, "%d", keycount);
+	key->debugfs.cnt = keycount;
+	keycount++;
+	key->debugfs.dir = debugfs_create_dir(buf,
+					key->local->debugfs.keys);
+
+	if (!key->debugfs.dir)
+		return;
+
+	sta = key->sta;
+	if (sta) {
+		sprintf(buf, "../../netdev:%s/stations/%pM",
+			sta->sdata->name, sta->sta.addr);
+		key->debugfs.stalink =
+			debugfs_create_symlink("station", key->debugfs.dir, buf);
+	}
+
+	DEBUGFS_ADD(keylen);
+	DEBUGFS_ADD(flags);
+	DEBUGFS_ADD(keyidx);
+	DEBUGFS_ADD(hw_key_idx);
+	DEBUGFS_ADD(tx_rx_count);
+	DEBUGFS_ADD(algorithm);
+	DEBUGFS_ADD(tx_spec);
+	DEBUGFS_ADD(rx_spec);
+	DEBUGFS_ADD(replays);
+	DEBUGFS_ADD(icverrors);
+	DEBUGFS_ADD(mic_failures);
+	DEBUGFS_ADD(key);
+	DEBUGFS_ADD(ifindex);
+};
+
+void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
+{
+	if (!key)
+		return;
+
+	debugfs_remove_recursive(key->debugfs.dir);
+	key->debugfs.dir = NULL;
+}
+
+void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
+{
+	char buf[50];
+	struct ieee80211_key *key;
+
+	if (!sdata->vif.debugfs_dir)
+		return;
+
+	lockdep_assert_held(&sdata->local->key_mtx);
+
+	if (sdata->debugfs.default_unicast_key) {
+		debugfs_remove(sdata->debugfs.default_unicast_key);
+		sdata->debugfs.default_unicast_key = NULL;
+	}
+
+	if (sdata->default_unicast_key) {
+		key = key_mtx_dereference(sdata->local,
+					  sdata->default_unicast_key);
+		sprintf(buf, "../keys/%d", key->debugfs.cnt);
+		sdata->debugfs.default_unicast_key =
+			debugfs_create_symlink("default_unicast_key",
+					       sdata->vif.debugfs_dir, buf);
+	}
+
+	if (sdata->debugfs.default_multicast_key) {
+		debugfs_remove(sdata->debugfs.default_multicast_key);
+		sdata->debugfs.default_multicast_key = NULL;
+	}
+
+	if (sdata->default_multicast_key) {
+		key = key_mtx_dereference(sdata->local,
+					  sdata->default_multicast_key);
+		sprintf(buf, "../keys/%d", key->debugfs.cnt);
+		sdata->debugfs.default_multicast_key =
+			debugfs_create_symlink("default_multicast_key",
+					       sdata->vif.debugfs_dir, buf);
+	}
+}
+
+void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
+{
+	char buf[50];
+	struct ieee80211_key *key;
+
+	if (!sdata->vif.debugfs_dir)
+		return;
+
+	key = key_mtx_dereference(sdata->local,
+				  sdata->default_mgmt_key);
+	if (key) {
+		sprintf(buf, "../keys/%d", key->debugfs.cnt);
+		sdata->debugfs.default_mgmt_key =
+			debugfs_create_symlink("default_mgmt_key",
+					       sdata->vif.debugfs_dir, buf);
+	} else
+		ieee80211_debugfs_key_remove_mgmt_default(sdata);
+}
+
+void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
+{
+	if (!sdata)
+		return;
+
+	debugfs_remove(sdata->debugfs.default_mgmt_key);
+	sdata->debugfs.default_mgmt_key = NULL;
+}
+
+void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
+				   struct sta_info *sta)
+{
+	debugfs_remove(key->debugfs.stalink);
+	key->debugfs.stalink = NULL;
+}
diff --git a/net/mac80211/debugfs_key.h b/net/mac80211/debugfs_key.h
new file mode 100644
index 0000000..ae98ef3
--- /dev/null
+++ b/net/mac80211/debugfs_key.h
@@ -0,0 +1,33 @@
+#ifndef __MAC80211_DEBUGFS_KEY_H
+#define __MAC80211_DEBUGFS_KEY_H
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+void ieee80211_debugfs_key_add(struct ieee80211_key *key);
+void ieee80211_debugfs_key_remove(struct ieee80211_key *key);
+void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata);
+void ieee80211_debugfs_key_add_mgmt_default(
+	struct ieee80211_sub_if_data *sdata);
+void ieee80211_debugfs_key_remove_mgmt_default(
+	struct ieee80211_sub_if_data *sdata);
+void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
+				   struct sta_info *sta);
+#else
+static inline void ieee80211_debugfs_key_add(struct ieee80211_key *key)
+{}
+static inline void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
+{}
+static inline void ieee80211_debugfs_key_update_default(
+	struct ieee80211_sub_if_data *sdata)
+{}
+static inline void ieee80211_debugfs_key_add_mgmt_default(
+	struct ieee80211_sub_if_data *sdata)
+{}
+static inline void ieee80211_debugfs_key_remove_mgmt_default(
+	struct ieee80211_sub_if_data *sdata)
+{}
+static inline void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
+						 struct sta_info *sta)
+{}
+#endif
+
+#endif /* __MAC80211_DEBUGFS_KEY_H */
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
new file mode 100644
index 0000000..b8a59f9
--- /dev/null
+++ b/net/mac80211/debugfs_netdev.c
@@ -0,0 +1,719 @@
+/*
+ * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/slab.h>
+#include <linux/notifier.h>
+#include <net/mac80211.h>
+#include <net/cfg80211.h>
+#include "ieee80211_i.h"
+#include "rate.h"
+#include "debugfs.h"
+#include "debugfs_netdev.h"
+#include "driver-ops.h"
+
+static ssize_t ieee80211_if_read(
+	struct ieee80211_sub_if_data *sdata,
+	char __user *userbuf,
+	size_t count, loff_t *ppos,
+	ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
+{
+	char buf[70];
+	ssize_t ret = -EINVAL;
+
+	read_lock(&dev_base_lock);
+	if (sdata->dev->reg_state == NETREG_REGISTERED)
+		ret = (*format)(sdata, buf, sizeof(buf));
+	read_unlock(&dev_base_lock);
+
+	if (ret >= 0)
+		ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+
+	return ret;
+}
+
+static ssize_t ieee80211_if_write(
+	struct ieee80211_sub_if_data *sdata,
+	const char __user *userbuf,
+	size_t count, loff_t *ppos,
+	ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int))
+{
+	char buf[64];
+	ssize_t ret;
+
+	if (count >= sizeof(buf))
+		return -E2BIG;
+
+	if (copy_from_user(buf, userbuf, count))
+		return -EFAULT;
+	buf[count] = '\0';
+
+	ret = -ENODEV;
+	rtnl_lock();
+	if (sdata->dev->reg_state == NETREG_REGISTERED)
+		ret = (*write)(sdata, buf, count);
+	rtnl_unlock();
+
+	return ret;
+}
+
+#define IEEE80211_IF_FMT(name, field, format_string)			\
+static ssize_t ieee80211_if_fmt_##name(					\
+	const struct ieee80211_sub_if_data *sdata, char *buf,		\
+	int buflen)							\
+{									\
+	return scnprintf(buf, buflen, format_string, sdata->field);	\
+}
+#define IEEE80211_IF_FMT_DEC(name, field)				\
+		IEEE80211_IF_FMT(name, field, "%d\n")
+#define IEEE80211_IF_FMT_HEX(name, field)				\
+		IEEE80211_IF_FMT(name, field, "%#x\n")
+#define IEEE80211_IF_FMT_LHEX(name, field)				\
+		IEEE80211_IF_FMT(name, field, "%#lx\n")
+#define IEEE80211_IF_FMT_SIZE(name, field)				\
+		IEEE80211_IF_FMT(name, field, "%zd\n")
+
+#define IEEE80211_IF_FMT_HEXARRAY(name, field)				\
+static ssize_t ieee80211_if_fmt_##name(					\
+	const struct ieee80211_sub_if_data *sdata,			\
+	char *buf, int buflen)						\
+{									\
+	char *p = buf;							\
+	int i;								\
+	for (i = 0; i < sizeof(sdata->field); i++) {			\
+		p += scnprintf(p, buflen + buf - p, "%.2x ",		\
+				 sdata->field[i]);			\
+	}								\
+	p += scnprintf(p, buflen + buf - p, "\n");			\
+	return p - buf;							\
+}
+
+#define IEEE80211_IF_FMT_ATOMIC(name, field)				\
+static ssize_t ieee80211_if_fmt_##name(					\
+	const struct ieee80211_sub_if_data *sdata,			\
+	char *buf, int buflen)						\
+{									\
+	return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
+}
+
+#define IEEE80211_IF_FMT_MAC(name, field)				\
+static ssize_t ieee80211_if_fmt_##name(					\
+	const struct ieee80211_sub_if_data *sdata, char *buf,		\
+	int buflen)							\
+{									\
+	return scnprintf(buf, buflen, "%pM\n", sdata->field);		\
+}
+
+#define IEEE80211_IF_FMT_DEC_DIV_16(name, field)			\
+static ssize_t ieee80211_if_fmt_##name(					\
+	const struct ieee80211_sub_if_data *sdata,			\
+	char *buf, int buflen)						\
+{									\
+	return scnprintf(buf, buflen, "%d\n", sdata->field / 16);	\
+}
+
+#define IEEE80211_IF_FMT_JIFFIES_TO_MS(name, field)			\
+static ssize_t ieee80211_if_fmt_##name(					\
+	const struct ieee80211_sub_if_data *sdata,			\
+	char *buf, int buflen)						\
+{									\
+	return scnprintf(buf, buflen, "%d\n",				\
+			 jiffies_to_msecs(sdata->field));		\
+}
+
+#define __IEEE80211_IF_FILE(name, _write)				\
+static ssize_t ieee80211_if_read_##name(struct file *file,		\
+					char __user *userbuf,		\
+					size_t count, loff_t *ppos)	\
+{									\
+	return ieee80211_if_read(file->private_data,			\
+				 userbuf, count, ppos,			\
+				 ieee80211_if_fmt_##name);		\
+}									\
+static const struct file_operations name##_ops = {			\
+	.read = ieee80211_if_read_##name,				\
+	.write = (_write),						\
+	.open = simple_open,						\
+	.llseek = generic_file_llseek,					\
+}
+
+#define __IEEE80211_IF_FILE_W(name)					\
+static ssize_t ieee80211_if_write_##name(struct file *file,		\
+					 const char __user *userbuf,	\
+					 size_t count, loff_t *ppos)	\
+{									\
+	return ieee80211_if_write(file->private_data, userbuf, count,	\
+				  ppos, ieee80211_if_parse_##name);	\
+}									\
+__IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
+
+
+#define IEEE80211_IF_FILE(name, field, format)				\
+		IEEE80211_IF_FMT_##format(name, field)			\
+		__IEEE80211_IF_FILE(name, NULL)
+
+/* common attributes */
+IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
+IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
+		  HEX);
+IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
+		  HEX);
+IEEE80211_IF_FILE(rc_rateidx_mcs_mask_2ghz,
+		  rc_rateidx_mcs_mask[IEEE80211_BAND_2GHZ], HEXARRAY);
+IEEE80211_IF_FILE(rc_rateidx_mcs_mask_5ghz,
+		  rc_rateidx_mcs_mask[IEEE80211_BAND_5GHZ], HEXARRAY);
+
+IEEE80211_IF_FILE(flags, flags, HEX);
+IEEE80211_IF_FILE(state, state, LHEX);
+IEEE80211_IF_FILE(txpower, vif.bss_conf.txpower, DEC);
+IEEE80211_IF_FILE(ap_power_level, ap_power_level, DEC);
+IEEE80211_IF_FILE(user_power_level, user_power_level, DEC);
+
+static ssize_t
+ieee80211_if_fmt_hw_queues(const struct ieee80211_sub_if_data *sdata,
+			   char *buf, int buflen)
+{
+	int len;
+
+	len = scnprintf(buf, buflen, "AC queues: VO:%d VI:%d BE:%d BK:%d\n",
+			sdata->vif.hw_queue[IEEE80211_AC_VO],
+			sdata->vif.hw_queue[IEEE80211_AC_VI],
+			sdata->vif.hw_queue[IEEE80211_AC_BE],
+			sdata->vif.hw_queue[IEEE80211_AC_BK]);
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP)
+		len += scnprintf(buf + len, buflen - len, "cab queue: %d\n",
+				 sdata->vif.cab_queue);
+
+	return len;
+}
+__IEEE80211_IF_FILE(hw_queues, NULL);
+
+/* STA attributes */
+IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
+IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
+IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
+IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
+IEEE80211_IF_FILE(beacon_timeout, u.mgd.beacon_timeout, JIFFIES_TO_MS);
+
+static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
+			      enum ieee80211_smps_mode smps_mode)
+{
+	struct ieee80211_local *local = sdata->local;
+	int err;
+
+	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
+	    smps_mode == IEEE80211_SMPS_STATIC)
+		return -EINVAL;
+
+	/* auto should be dynamic if in PS mode */
+	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
+	    (smps_mode == IEEE80211_SMPS_DYNAMIC ||
+	     smps_mode == IEEE80211_SMPS_AUTOMATIC))
+		return -EINVAL;
+
+	/* supported only on managed interfaces for now */
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return -EOPNOTSUPP;
+
+	mutex_lock(&sdata->u.mgd.mtx);
+	err = __ieee80211_request_smps(sdata, smps_mode);
+	mutex_unlock(&sdata->u.mgd.mtx);
+
+	return err;
+}
+
+static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
+	[IEEE80211_SMPS_AUTOMATIC] = "auto",
+	[IEEE80211_SMPS_OFF] = "off",
+	[IEEE80211_SMPS_STATIC] = "static",
+	[IEEE80211_SMPS_DYNAMIC] = "dynamic",
+};
+
+static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
+				     char *buf, int buflen)
+{
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return -EOPNOTSUPP;
+
+	return snprintf(buf, buflen, "request: %s\nused: %s\n",
+			smps_modes[sdata->u.mgd.req_smps],
+			smps_modes[sdata->smps_mode]);
+}
+
+static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
+				       const char *buf, int buflen)
+{
+	enum ieee80211_smps_mode mode;
+
+	for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
+		if (strncmp(buf, smps_modes[mode], buflen) == 0) {
+			int err = ieee80211_set_smps(sdata, mode);
+			if (!err)
+				return buflen;
+			return err;
+		}
+	}
+
+	return -EINVAL;
+}
+
+__IEEE80211_IF_FILE_W(smps);
+
+static ssize_t ieee80211_if_fmt_tkip_mic_test(
+	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
+{
+	return -EOPNOTSUPP;
+}
+
+static ssize_t ieee80211_if_parse_tkip_mic_test(
+	struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
+{
+	struct ieee80211_local *local = sdata->local;
+	u8 addr[ETH_ALEN];
+	struct sk_buff *skb;
+	struct ieee80211_hdr *hdr;
+	__le16 fc;
+
+	if (!mac_pton(buf, addr))
+		return -EINVAL;
+
+	if (!ieee80211_sdata_running(sdata))
+		return -ENOTCONN;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 100);
+	if (!skb)
+		return -ENOMEM;
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	hdr = (struct ieee80211_hdr *) skb_put(skb, 24);
+	memset(hdr, 0, 24);
+	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP:
+		fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
+		/* DA BSSID SA */
+		memcpy(hdr->addr1, addr, ETH_ALEN);
+		memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
+		memcpy(hdr->addr3, sdata->vif.addr, ETH_ALEN);
+		break;
+	case NL80211_IFTYPE_STATION:
+		fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
+		/* BSSID SA DA */
+		mutex_lock(&sdata->u.mgd.mtx);
+		if (!sdata->u.mgd.associated) {
+			mutex_unlock(&sdata->u.mgd.mtx);
+			dev_kfree_skb(skb);
+			return -ENOTCONN;
+		}
+		memcpy(hdr->addr1, sdata->u.mgd.associated->bssid, ETH_ALEN);
+		memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
+		memcpy(hdr->addr3, addr, ETH_ALEN);
+		mutex_unlock(&sdata->u.mgd.mtx);
+		break;
+	default:
+		dev_kfree_skb(skb);
+		return -EOPNOTSUPP;
+	}
+	hdr->frame_control = fc;
+
+	/*
+	 * Add some length to the test frame to make it look bit more valid.
+	 * The exact contents does not matter since the recipient is required
+	 * to drop this because of the Michael MIC failure.
+	 */
+	memset(skb_put(skb, 50), 0, 50);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_TKIP_MIC_FAILURE;
+
+	ieee80211_tx_skb(sdata, skb);
+
+	return buflen;
+}
+
+__IEEE80211_IF_FILE_W(tkip_mic_test);
+
+static ssize_t ieee80211_if_fmt_uapsd_queues(
+	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
+{
+	const struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	return snprintf(buf, buflen, "0x%x\n", ifmgd->uapsd_queues);
+}
+
+static ssize_t ieee80211_if_parse_uapsd_queues(
+	struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 val;
+	int ret;
+
+	ret = kstrtou8(buf, 0, &val);
+	if (ret)
+		return ret;
+
+	if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
+		return -ERANGE;
+
+	ifmgd->uapsd_queues = val;
+
+	return buflen;
+}
+__IEEE80211_IF_FILE_W(uapsd_queues);
+
+static ssize_t ieee80211_if_fmt_uapsd_max_sp_len(
+	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
+{
+	const struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	return snprintf(buf, buflen, "0x%x\n", ifmgd->uapsd_max_sp_len);
+}
+
+static ssize_t ieee80211_if_parse_uapsd_max_sp_len(
+	struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 0, &val);
+	if (ret)
+		return -EINVAL;
+
+	if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
+		return -ERANGE;
+
+	ifmgd->uapsd_max_sp_len = val;
+
+	return buflen;
+}
+__IEEE80211_IF_FILE_W(uapsd_max_sp_len);
+
+/* AP attributes */
+IEEE80211_IF_FILE(num_mcast_sta, u.ap.num_mcast_sta, ATOMIC);
+IEEE80211_IF_FILE(num_sta_ps, u.ap.ps.num_sta_ps, ATOMIC);
+IEEE80211_IF_FILE(dtim_count, u.ap.ps.dtim_count, DEC);
+
+static ssize_t ieee80211_if_fmt_num_buffered_multicast(
+	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
+{
+	return scnprintf(buf, buflen, "%u\n",
+			 skb_queue_len(&sdata->u.ap.ps.bc_buf));
+}
+__IEEE80211_IF_FILE(num_buffered_multicast, NULL);
+
+/* IBSS attributes */
+static ssize_t ieee80211_if_fmt_tsf(
+	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
+{
+	struct ieee80211_local *local = sdata->local;
+	u64 tsf;
+
+	tsf = drv_get_tsf(local, (struct ieee80211_sub_if_data *)sdata);
+
+	return scnprintf(buf, buflen, "0x%016llx\n", (unsigned long long) tsf);
+}
+
+static ssize_t ieee80211_if_parse_tsf(
+	struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
+{
+	struct ieee80211_local *local = sdata->local;
+	unsigned long long tsf;
+	int ret;
+	int tsf_is_delta = 0;
+
+	if (strncmp(buf, "reset", 5) == 0) {
+		if (local->ops->reset_tsf) {
+			drv_reset_tsf(local, sdata);
+			wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
+		}
+	} else {
+		if (buflen > 10 && buf[1] == '=') {
+			if (buf[0] == '+')
+				tsf_is_delta = 1;
+			else if (buf[0] == '-')
+				tsf_is_delta = -1;
+			else
+				return -EINVAL;
+			buf += 2;
+		}
+		ret = kstrtoull(buf, 10, &tsf);
+		if (ret < 0)
+			return ret;
+		if (tsf_is_delta)
+			tsf = drv_get_tsf(local, sdata) + tsf_is_delta * tsf;
+		if (local->ops->set_tsf) {
+			drv_set_tsf(local, sdata, tsf);
+			wiphy_info(local->hw.wiphy,
+				   "debugfs set TSF to %#018llx\n", tsf);
+		}
+	}
+
+	return buflen;
+}
+__IEEE80211_IF_FILE_W(tsf);
+
+
+/* WDS attributes */
+IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
+
+#ifdef CPTCFG_MAC80211_MESH
+/* Mesh stats attributes */
+IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
+IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
+IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
+IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
+IEEE80211_IF_FILE(dropped_frames_congestion,
+		  u.mesh.mshstats.dropped_frames_congestion, DEC);
+IEEE80211_IF_FILE(dropped_frames_no_route,
+		  u.mesh.mshstats.dropped_frames_no_route, DEC);
+IEEE80211_IF_FILE(estab_plinks, u.mesh.estab_plinks, ATOMIC);
+
+/* Mesh parameters */
+IEEE80211_IF_FILE(dot11MeshMaxRetries,
+		  u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
+IEEE80211_IF_FILE(dot11MeshRetryTimeout,
+		  u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
+IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
+		  u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
+IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
+		  u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
+IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
+IEEE80211_IF_FILE(element_ttl, u.mesh.mshcfg.element_ttl, DEC);
+IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
+IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
+		  u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
+		  u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
+		  u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPperrMinInterval,
+		  u.mesh.mshcfg.dot11MeshHWMPperrMinInterval, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
+		  u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
+		  u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
+IEEE80211_IF_FILE(path_refresh_time,
+		  u.mesh.mshcfg.path_refresh_time, DEC);
+IEEE80211_IF_FILE(min_discovery_timeout,
+		  u.mesh.mshcfg.min_discovery_timeout, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
+		  u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
+IEEE80211_IF_FILE(dot11MeshGateAnnouncementProtocol,
+		  u.mesh.mshcfg.dot11MeshGateAnnouncementProtocol, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPRannInterval,
+		  u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC);
+IEEE80211_IF_FILE(dot11MeshForwarding, u.mesh.mshcfg.dot11MeshForwarding, DEC);
+IEEE80211_IF_FILE(rssi_threshold, u.mesh.mshcfg.rssi_threshold, DEC);
+IEEE80211_IF_FILE(ht_opmode, u.mesh.mshcfg.ht_opmode, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPactivePathToRootTimeout,
+		  u.mesh.mshcfg.dot11MeshHWMPactivePathToRootTimeout, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMProotInterval,
+		  u.mesh.mshcfg.dot11MeshHWMProotInterval, DEC);
+IEEE80211_IF_FILE(dot11MeshHWMPconfirmationInterval,
+		  u.mesh.mshcfg.dot11MeshHWMPconfirmationInterval, DEC);
+IEEE80211_IF_FILE(power_mode, u.mesh.mshcfg.power_mode, DEC);
+IEEE80211_IF_FILE(dot11MeshAwakeWindowDuration,
+		  u.mesh.mshcfg.dot11MeshAwakeWindowDuration, DEC);
+#endif
+
+#define DEBUGFS_ADD_MODE(name, mode) \
+	debugfs_create_file(#name, mode, sdata->vif.debugfs_dir, \
+			    sdata, &name##_ops);
+
+#define DEBUGFS_ADD(name) DEBUGFS_ADD_MODE(name, 0400)
+
+static void add_common_files(struct ieee80211_sub_if_data *sdata)
+{
+	DEBUGFS_ADD(drop_unencrypted);
+	DEBUGFS_ADD(rc_rateidx_mask_2ghz);
+	DEBUGFS_ADD(rc_rateidx_mask_5ghz);
+	DEBUGFS_ADD(rc_rateidx_mcs_mask_2ghz);
+	DEBUGFS_ADD(rc_rateidx_mcs_mask_5ghz);
+	DEBUGFS_ADD(hw_queues);
+}
+
+static void add_sta_files(struct ieee80211_sub_if_data *sdata)
+{
+	DEBUGFS_ADD(bssid);
+	DEBUGFS_ADD(aid);
+	DEBUGFS_ADD(last_beacon);
+	DEBUGFS_ADD(ave_beacon);
+	DEBUGFS_ADD(beacon_timeout);
+	DEBUGFS_ADD_MODE(smps, 0600);
+	DEBUGFS_ADD_MODE(tkip_mic_test, 0200);
+	DEBUGFS_ADD_MODE(uapsd_queues, 0600);
+	DEBUGFS_ADD_MODE(uapsd_max_sp_len, 0600);
+}
+
+static void add_ap_files(struct ieee80211_sub_if_data *sdata)
+{
+	DEBUGFS_ADD(num_mcast_sta);
+	DEBUGFS_ADD(num_sta_ps);
+	DEBUGFS_ADD(dtim_count);
+	DEBUGFS_ADD(num_buffered_multicast);
+	DEBUGFS_ADD_MODE(tkip_mic_test, 0200);
+}
+
+static void add_ibss_files(struct ieee80211_sub_if_data *sdata)
+{
+	DEBUGFS_ADD_MODE(tsf, 0600);
+}
+
+static void add_wds_files(struct ieee80211_sub_if_data *sdata)
+{
+	DEBUGFS_ADD(peer);
+}
+
+#ifdef CPTCFG_MAC80211_MESH
+
+static void add_mesh_files(struct ieee80211_sub_if_data *sdata)
+{
+	DEBUGFS_ADD_MODE(tsf, 0600);
+}
+
+static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
+{
+	struct dentry *dir = debugfs_create_dir("mesh_stats",
+						sdata->vif.debugfs_dir);
+#define MESHSTATS_ADD(name)\
+	debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
+
+	MESHSTATS_ADD(fwded_mcast);
+	MESHSTATS_ADD(fwded_unicast);
+	MESHSTATS_ADD(fwded_frames);
+	MESHSTATS_ADD(dropped_frames_ttl);
+	MESHSTATS_ADD(dropped_frames_no_route);
+	MESHSTATS_ADD(dropped_frames_congestion);
+	MESHSTATS_ADD(estab_plinks);
+#undef MESHSTATS_ADD
+}
+
+static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
+{
+	struct dentry *dir = debugfs_create_dir("mesh_config",
+						sdata->vif.debugfs_dir);
+
+#define MESHPARAMS_ADD(name) \
+	debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
+
+	MESHPARAMS_ADD(dot11MeshMaxRetries);
+	MESHPARAMS_ADD(dot11MeshRetryTimeout);
+	MESHPARAMS_ADD(dot11MeshConfirmTimeout);
+	MESHPARAMS_ADD(dot11MeshHoldingTimeout);
+	MESHPARAMS_ADD(dot11MeshTTL);
+	MESHPARAMS_ADD(element_ttl);
+	MESHPARAMS_ADD(auto_open_plinks);
+	MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
+	MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
+	MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
+	MESHPARAMS_ADD(dot11MeshHWMPperrMinInterval);
+	MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
+	MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
+	MESHPARAMS_ADD(path_refresh_time);
+	MESHPARAMS_ADD(min_discovery_timeout);
+	MESHPARAMS_ADD(dot11MeshHWMPRootMode);
+	MESHPARAMS_ADD(dot11MeshHWMPRannInterval);
+	MESHPARAMS_ADD(dot11MeshForwarding);
+	MESHPARAMS_ADD(dot11MeshGateAnnouncementProtocol);
+	MESHPARAMS_ADD(rssi_threshold);
+	MESHPARAMS_ADD(ht_opmode);
+	MESHPARAMS_ADD(dot11MeshHWMPactivePathToRootTimeout);
+	MESHPARAMS_ADD(dot11MeshHWMProotInterval);
+	MESHPARAMS_ADD(dot11MeshHWMPconfirmationInterval);
+	MESHPARAMS_ADD(power_mode);
+	MESHPARAMS_ADD(dot11MeshAwakeWindowDuration);
+#undef MESHPARAMS_ADD
+}
+#endif
+
+static void add_files(struct ieee80211_sub_if_data *sdata)
+{
+	if (!sdata->vif.debugfs_dir)
+		return;
+
+	DEBUGFS_ADD(flags);
+	DEBUGFS_ADD(state);
+	DEBUGFS_ADD(txpower);
+	DEBUGFS_ADD(user_power_level);
+	DEBUGFS_ADD(ap_power_level);
+
+	if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
+		add_common_files(sdata);
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_MESH_POINT:
+#ifdef CPTCFG_MAC80211_MESH
+		add_mesh_files(sdata);
+		add_mesh_stats(sdata);
+		add_mesh_config(sdata);
+#endif
+		break;
+	case NL80211_IFTYPE_STATION:
+		add_sta_files(sdata);
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		add_ibss_files(sdata);
+		break;
+	case NL80211_IFTYPE_AP:
+		add_ap_files(sdata);
+		break;
+	case NL80211_IFTYPE_WDS:
+		add_wds_files(sdata);
+		break;
+	default:
+		break;
+	}
+}
+
+void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
+{
+	char buf[10+IFNAMSIZ];
+
+	sprintf(buf, "netdev:%s", sdata->name);
+	sdata->vif.debugfs_dir = debugfs_create_dir(buf,
+		sdata->local->hw.wiphy->debugfsdir);
+	if (sdata->vif.debugfs_dir)
+		sdata->debugfs.subdir_stations = debugfs_create_dir("stations",
+			sdata->vif.debugfs_dir);
+	add_files(sdata);
+}
+
+void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
+{
+	if (!sdata->vif.debugfs_dir)
+		return;
+
+	debugfs_remove_recursive(sdata->vif.debugfs_dir);
+	sdata->vif.debugfs_dir = NULL;
+}
+
+void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
+{
+	struct dentry *dir;
+	char buf[10 + IFNAMSIZ];
+
+	dir = sdata->vif.debugfs_dir;
+
+	if (!dir)
+		return;
+
+	sprintf(buf, "netdev:%s", sdata->name);
+	if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
+		sdata_err(sdata,
+			  "debugfs: failed to rename debugfs dir to %s\n",
+			  buf);
+}
diff --git a/net/mac80211/debugfs_netdev.h b/net/mac80211/debugfs_netdev.h
new file mode 100644
index 0000000..ce6e1d9
--- /dev/null
+++ b/net/mac80211/debugfs_netdev.h
@@ -0,0 +1,22 @@
+/* routines exported for debugfs handling */
+
+#ifndef __IEEE80211_DEBUGFS_NETDEV_H
+#define __IEEE80211_DEBUGFS_NETDEV_H
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata);
+void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata);
+void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata);
+#else
+static inline void ieee80211_debugfs_add_netdev(
+	struct ieee80211_sub_if_data *sdata)
+{}
+static inline void ieee80211_debugfs_remove_netdev(
+	struct ieee80211_sub_if_data *sdata)
+{}
+static inline void ieee80211_debugfs_rename_netdev(
+	struct ieee80211_sub_if_data *sdata)
+{}
+#endif
+
+#endif /* __IEEE80211_DEBUGFS_NETDEV_H */
diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
new file mode 100644
index 0000000..44e201d
--- /dev/null
+++ b/net/mac80211/debugfs_sta.c
@@ -0,0 +1,469 @@
+/*
+ * Copyright 2003-2005	Devicescape Software, Inc.
+ * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/ieee80211.h>
+#include "ieee80211_i.h"
+#include "debugfs.h"
+#include "debugfs_sta.h"
+#include "sta_info.h"
+#include "driver-ops.h"
+
+/* sta attributtes */
+
+#define STA_READ(name, field, format_string)				\
+static ssize_t sta_ ##name## _read(struct file *file,			\
+				   char __user *userbuf,		\
+				   size_t count, loff_t *ppos)		\
+{									\
+	struct sta_info *sta = file->private_data;			\
+	return mac80211_format_buffer(userbuf, count, ppos, 		\
+				      format_string, sta->field);	\
+}
+#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
+#define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
+#define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
+
+#define STA_OPS(name)							\
+static const struct file_operations sta_ ##name## _ops = {		\
+	.read = sta_##name##_read,					\
+	.open = simple_open,						\
+	.llseek = generic_file_llseek,					\
+}
+
+#define STA_OPS_RW(name)						\
+static const struct file_operations sta_ ##name## _ops = {		\
+	.read = sta_##name##_read,					\
+	.write = sta_##name##_write,					\
+	.open = simple_open,						\
+	.llseek = generic_file_llseek,					\
+}
+
+#define STA_FILE(name, field, format)					\
+		STA_READ_##format(name, field)				\
+		STA_OPS(name)
+
+STA_FILE(aid, sta.aid, D);
+STA_FILE(dev, sdata->name, S);
+STA_FILE(last_signal, last_signal, D);
+STA_FILE(last_ack_signal, last_ack_signal, D);
+STA_FILE(beacon_loss_count, beacon_loss_count, D);
+
+static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
+			      size_t count, loff_t *ppos)
+{
+	char buf[121];
+	struct sta_info *sta = file->private_data;
+
+#define TEST(flg) \
+	test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
+
+	int res = scnprintf(buf, sizeof(buf),
+			    "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+			    TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
+			    TEST(PS_DRIVER), TEST(AUTHORIZED),
+			    TEST(SHORT_PREAMBLE),
+			    TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
+			    TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
+			    TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
+			    TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
+			    TEST(INSERTED), TEST(RATE_CONTROL),
+			    TEST(TOFFSET_KNOWN), TEST(MPSP_OWNER),
+			    TEST(MPSP_RECIPIENT));
+#undef TEST
+	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
+}
+STA_OPS(flags);
+
+static ssize_t sta_num_ps_buf_frames_read(struct file *file,
+					  char __user *userbuf,
+					  size_t count, loff_t *ppos)
+{
+	struct sta_info *sta = file->private_data;
+	char buf[17*IEEE80211_NUM_ACS], *p = buf;
+	int ac;
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+		p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
+			       skb_queue_len(&sta->ps_tx_buf[ac]) +
+			       skb_queue_len(&sta->tx_filtered[ac]));
+	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+}
+STA_OPS(num_ps_buf_frames);
+
+static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
+				    size_t count, loff_t *ppos)
+{
+	struct sta_info *sta = file->private_data;
+	return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
+				      jiffies_to_msecs(jiffies - sta->last_rx));
+}
+STA_OPS(inactive_ms);
+
+
+static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
+					size_t count, loff_t *ppos)
+{
+	struct sta_info *sta = file->private_data;
+	struct timespec uptime;
+	struct tm result;
+	long connected_time_secs;
+	char buf[100];
+	int res;
+	do_posix_clock_monotonic_gettime(&uptime);
+	connected_time_secs = uptime.tv_sec - sta->last_connected;
+	time_to_tm(connected_time_secs, 0, &result);
+	result.tm_year -= 70;
+	result.tm_mday -= 1;
+	res = scnprintf(buf, sizeof(buf),
+		"years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
+			result.tm_year, result.tm_mon, result.tm_mday,
+			result.tm_hour, result.tm_min, result.tm_sec);
+	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
+}
+STA_OPS(connected_time);
+
+
+
+static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
+				      size_t count, loff_t *ppos)
+{
+	char buf[15*IEEE80211_NUM_TIDS], *p = buf;
+	int i;
+	struct sta_info *sta = file->private_data;
+	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
+		p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
+			       le16_to_cpu(sta->last_seq_ctrl[i]));
+	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
+	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+}
+STA_OPS(last_seq_ctrl);
+
+static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
+					size_t count, loff_t *ppos)
+{
+	char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
+	int i;
+	struct sta_info *sta = file->private_data;
+	struct tid_ampdu_rx *tid_rx;
+	struct tid_ampdu_tx *tid_tx;
+
+	rcu_read_lock();
+
+	p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
+			sta->ampdu_mlme.dialog_token_allocator + 1);
+	p += scnprintf(p, sizeof(buf) + buf - p,
+		       "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
+
+	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
+		tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
+		tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
+
+		p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
+		p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
+		p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
+				tid_rx ? tid_rx->dialog_token : 0);
+		p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
+				tid_rx ? tid_rx->ssn : 0);
+
+		p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
+		p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
+				tid_tx ? tid_tx->dialog_token : 0);
+		p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
+				tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
+		p += scnprintf(p, sizeof(buf) + buf - p, "\n");
+	}
+	rcu_read_unlock();
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+}
+
+static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
+				    size_t count, loff_t *ppos)
+{
+	char _buf[12], *buf = _buf;
+	struct sta_info *sta = file->private_data;
+	bool start, tx;
+	unsigned long tid;
+	int ret;
+
+	if (count > sizeof(_buf))
+		return -EINVAL;
+
+	if (copy_from_user(buf, userbuf, count))
+		return -EFAULT;
+
+	buf[sizeof(_buf) - 1] = '\0';
+
+	if (strncmp(buf, "tx ", 3) == 0) {
+		buf += 3;
+		tx = true;
+	} else if (strncmp(buf, "rx ", 3) == 0) {
+		buf += 3;
+		tx = false;
+	} else
+		return -EINVAL;
+
+	if (strncmp(buf, "start ", 6) == 0) {
+		buf += 6;
+		start = true;
+		if (!tx)
+			return -EINVAL;
+	} else if (strncmp(buf, "stop ", 5) == 0) {
+		buf += 5;
+		start = false;
+	} else
+		return -EINVAL;
+
+	ret = kstrtoul(buf, 0, &tid);
+	if (ret)
+		return ret;
+
+	if (tid >= IEEE80211_NUM_TIDS)
+		return -EINVAL;
+
+	if (tx) {
+		if (start)
+			ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
+		else
+			ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
+	} else {
+		__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
+					       3, true);
+		ret = 0;
+	}
+
+	return ret ?: count;
+}
+STA_OPS_RW(agg_status);
+
+static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
+				size_t count, loff_t *ppos)
+{
+#define PRINT_HT_CAP(_cond, _str) \
+	do { \
+	if (_cond) \
+			p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
+	} while (0)
+	char buf[512], *p = buf;
+	int i;
+	struct sta_info *sta = file->private_data;
+	struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
+
+	p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
+			htc->ht_supported ? "" : "not ");
+	if (htc->ht_supported) {
+		p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
+
+		PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
+		PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
+		PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
+
+		PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
+		PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
+		PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
+
+		PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
+		PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
+		PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
+		PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
+
+		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
+		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
+		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
+		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
+
+		PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
+
+		PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
+			     "3839 bytes");
+		PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
+			     "7935 bytes");
+
+		/*
+		 * For beacons and probe response this would mean the BSS
+		 * does or does not allow the usage of DSSS/CCK HT40.
+		 * Otherwise it means the STA does or does not use
+		 * DSSS/CCK HT40.
+		 */
+		PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
+		PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
+
+		/* BIT(13) is reserved */
+
+		PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
+
+		PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
+
+		p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
+				htc->ampdu_factor, htc->ampdu_density);
+		p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
+
+		for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
+			p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
+					htc->mcs.rx_mask[i]);
+		p += scnprintf(p, sizeof(buf)+buf-p, "\n");
+
+		/* If not set this is meaningless */
+		if (le16_to_cpu(htc->mcs.rx_highest)) {
+			p += scnprintf(p, sizeof(buf)+buf-p,
+				       "MCS rx highest: %d Mbps\n",
+				       le16_to_cpu(htc->mcs.rx_highest));
+		}
+
+		p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
+				htc->mcs.tx_params);
+	}
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+}
+STA_OPS(ht_capa);
+
+static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
+				 size_t count, loff_t *ppos)
+{
+	char buf[128], *p = buf;
+	struct sta_info *sta = file->private_data;
+	struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
+
+	p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
+			vhtc->vht_supported ? "" : "not ");
+	if (vhtc->vht_supported) {
+		p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
+
+		p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
+			       le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
+		if (vhtc->vht_mcs.rx_highest)
+			p += scnprintf(p, sizeof(buf)+buf-p,
+				       "MCS RX highest: %d Mbps\n",
+				       le16_to_cpu(vhtc->vht_mcs.rx_highest));
+		p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
+			       le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
+		if (vhtc->vht_mcs.tx_highest)
+			p += scnprintf(p, sizeof(buf)+buf-p,
+				       "MCS TX highest: %d Mbps\n",
+				       le16_to_cpu(vhtc->vht_mcs.tx_highest));
+	}
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+}
+STA_OPS(vht_capa);
+
+static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf,
+					size_t count, loff_t *ppos)
+{
+	struct sta_info *sta = file->private_data;
+	struct rate_info rinfo;
+	u16 rate;
+	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
+	rate = cfg80211_calculate_bitrate(&rinfo);
+
+	return mac80211_format_buffer(userbuf, count, ppos,
+				      "%d.%d MBit/s\n",
+				      rate/10, rate%10);
+}
+STA_OPS(current_tx_rate);
+
+static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf,
+				     size_t count, loff_t *ppos)
+{
+	struct sta_info *sta = file->private_data;
+	struct rate_info rinfo;
+	u16 rate;
+
+	sta_set_rate_info_rx(sta, &rinfo);
+
+	rate = cfg80211_calculate_bitrate(&rinfo);
+
+	return mac80211_format_buffer(userbuf, count, ppos,
+				      "%d.%d MBit/s\n",
+				      rate/10, rate%10);
+}
+STA_OPS(last_rx_rate);
+
+#define DEBUGFS_ADD(name) \
+	debugfs_create_file(#name, 0400, \
+		sta->debugfs.dir, sta, &sta_ ##name## _ops);
+
+#define DEBUGFS_ADD_COUNTER(name, field)				\
+	if (sizeof(sta->field) == sizeof(u32))				\
+		debugfs_create_u32(#name, 0400, sta->debugfs.dir,	\
+			(u32 *) &sta->field);				\
+	else								\
+		debugfs_create_u64(#name, 0400, sta->debugfs.dir,	\
+			(u64 *) &sta->field);
+
+void ieee80211_sta_debugfs_add(struct sta_info *sta)
+{
+	struct ieee80211_local *local = sta->local;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
+	u8 mac[3*ETH_ALEN];
+
+	sta->debugfs.add_has_run = true;
+
+	if (!stations_dir)
+		return;
+
+	snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
+
+	/*
+	 * This might fail due to a race condition:
+	 * When mac80211 unlinks a station, the debugfs entries
+	 * remain, but it is already possible to link a new
+	 * station with the same address which triggers adding
+	 * it to debugfs; therefore, if the old station isn't
+	 * destroyed quickly enough the old station's debugfs
+	 * dir might still be around.
+	 */
+	sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
+	if (!sta->debugfs.dir)
+		return;
+
+	DEBUGFS_ADD(flags);
+	DEBUGFS_ADD(num_ps_buf_frames);
+	DEBUGFS_ADD(inactive_ms);
+	DEBUGFS_ADD(connected_time);
+	DEBUGFS_ADD(last_seq_ctrl);
+	DEBUGFS_ADD(agg_status);
+	DEBUGFS_ADD(dev);
+	DEBUGFS_ADD(last_signal);
+	DEBUGFS_ADD(beacon_loss_count);
+	DEBUGFS_ADD(ht_capa);
+	DEBUGFS_ADD(vht_capa);
+	DEBUGFS_ADD(last_ack_signal);
+	DEBUGFS_ADD(current_tx_rate);
+	DEBUGFS_ADD(last_rx_rate);
+
+	DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
+	DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
+	DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
+	DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
+	DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
+	DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
+	DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
+	DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
+	DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
+	DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
+	DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
+	DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
+
+	drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
+}
+
+void ieee80211_sta_debugfs_remove(struct sta_info *sta)
+{
+	struct ieee80211_local *local = sta->local;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+
+	drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
+	debugfs_remove_recursive(sta->debugfs.dir);
+	sta->debugfs.dir = NULL;
+}
diff --git a/net/mac80211/debugfs_sta.h b/net/mac80211/debugfs_sta.h
new file mode 100644
index 0000000..9ef41eb
--- /dev/null
+++ b/net/mac80211/debugfs_sta.h
@@ -0,0 +1,14 @@
+#ifndef __MAC80211_DEBUGFS_STA_H
+#define __MAC80211_DEBUGFS_STA_H
+
+#include "sta_info.h"
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+void ieee80211_sta_debugfs_add(struct sta_info *sta);
+void ieee80211_sta_debugfs_remove(struct sta_info *sta);
+#else
+static inline void ieee80211_sta_debugfs_add(struct sta_info *sta) {}
+static inline void ieee80211_sta_debugfs_remove(struct sta_info *sta) {}
+#endif
+
+#endif /* __MAC80211_DEBUGFS_STA_H */
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
new file mode 100644
index 0000000..d2b87dd
--- /dev/null
+++ b/net/mac80211/driver-ops.h
@@ -0,0 +1,1106 @@
+#ifndef __MAC80211_DRIVER_OPS
+#define __MAC80211_DRIVER_OPS
+
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "trace.h"
+
+static inline void check_sdata_in_driver(struct ieee80211_sub_if_data *sdata)
+{
+	WARN(!(sdata->flags & IEEE80211_SDATA_IN_DRIVER),
+	     "%s:  Failed check-sdata-in-driver check, flags: 0x%x\n",
+	     sdata->dev ? sdata->dev->name : sdata->name, sdata->flags);
+}
+
+static inline struct ieee80211_sub_if_data *
+get_bss_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+		sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
+				     u.ap);
+
+	return sdata;
+}
+
+static inline void drv_tx(struct ieee80211_local *local,
+			  struct ieee80211_tx_control *control,
+			  struct sk_buff *skb)
+{
+	local->ops->tx(&local->hw, control, skb);
+}
+
+static inline void drv_get_et_strings(struct ieee80211_sub_if_data *sdata,
+				      u32 sset, u8 *data)
+{
+	struct ieee80211_local *local = sdata->local;
+	if (local->ops->get_et_strings) {
+		trace_drv_get_et_strings(local, sset);
+		local->ops->get_et_strings(&local->hw, &sdata->vif, sset, data);
+		trace_drv_return_void(local);
+	}
+}
+
+static inline void drv_get_et_stats(struct ieee80211_sub_if_data *sdata,
+				    struct ethtool_stats *stats,
+				    u64 *data)
+{
+	struct ieee80211_local *local = sdata->local;
+	if (local->ops->get_et_stats) {
+		trace_drv_get_et_stats(local);
+		local->ops->get_et_stats(&local->hw, &sdata->vif, stats, data);
+		trace_drv_return_void(local);
+	}
+}
+
+static inline int drv_get_et_sset_count(struct ieee80211_sub_if_data *sdata,
+					int sset)
+{
+	struct ieee80211_local *local = sdata->local;
+	int rv = 0;
+	if (local->ops->get_et_sset_count) {
+		trace_drv_get_et_sset_count(local, sset);
+		rv = local->ops->get_et_sset_count(&local->hw, &sdata->vif,
+						   sset);
+		trace_drv_return_int(local, rv);
+	}
+	return rv;
+}
+
+static inline int drv_start(struct ieee80211_local *local)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_start(local);
+	local->started = true;
+	smp_mb();
+	ret = local->ops->start(&local->hw);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_stop(struct ieee80211_local *local)
+{
+	might_sleep();
+
+	trace_drv_stop(local);
+	local->ops->stop(&local->hw);
+	trace_drv_return_void(local);
+
+	/* sync away all work on the tasklet before clearing started */
+	tasklet_disable(&local->tasklet);
+	tasklet_enable(&local->tasklet);
+
+	barrier();
+
+	local->started = false;
+}
+
+#ifdef CONFIG_PM
+static inline int drv_suspend(struct ieee80211_local *local,
+			      struct cfg80211_wowlan *wowlan)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_suspend(local);
+	ret = local->ops->suspend(&local->hw, wowlan);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline int drv_resume(struct ieee80211_local *local)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_resume(local);
+	ret = local->ops->resume(&local->hw);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_set_wakeup(struct ieee80211_local *local,
+				  bool enabled)
+{
+	might_sleep();
+
+	if (!local->ops->set_wakeup)
+		return;
+
+	trace_drv_set_wakeup(local, enabled);
+	local->ops->set_wakeup(&local->hw, enabled);
+	trace_drv_return_void(local);
+}
+#endif
+
+static inline int drv_add_interface(struct ieee80211_local *local,
+				    struct ieee80211_sub_if_data *sdata)
+{
+	int ret;
+
+	might_sleep();
+
+	if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+		    (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
+		     !(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))))
+		return -EINVAL;
+
+	trace_drv_add_interface(local, sdata);
+	ret = local->ops->add_interface(&local->hw, &sdata->vif);
+	trace_drv_return_int(local, ret);
+
+	if (ret == 0)
+		sdata->flags |= IEEE80211_SDATA_IN_DRIVER;
+
+	return ret;
+}
+
+static inline int drv_change_interface(struct ieee80211_local *local,
+				       struct ieee80211_sub_if_data *sdata,
+				       enum nl80211_iftype type, bool p2p)
+{
+	int ret;
+
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_change_interface(local, sdata, type, p2p);
+	ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_remove_interface(struct ieee80211_local *local,
+					struct ieee80211_sub_if_data *sdata)
+{
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_remove_interface(local, sdata);
+	local->ops->remove_interface(&local->hw, &sdata->vif);
+	sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
+	trace_drv_return_void(local);
+}
+
+static inline int drv_config(struct ieee80211_local *local, u32 changed)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_config(local, changed);
+	ret = local->ops->config(&local->hw, changed);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_bss_info_changed(struct ieee80211_local *local,
+					struct ieee80211_sub_if_data *sdata,
+					struct ieee80211_bss_conf *info,
+					u32 changed)
+{
+	might_sleep();
+
+	if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
+				    BSS_CHANGED_BEACON_ENABLED) &&
+			 sdata->vif.type != NL80211_IFTYPE_AP &&
+			 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+			 sdata->vif.type != NL80211_IFTYPE_MESH_POINT))
+		return;
+
+	if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
+			 sdata->vif.type == NL80211_IFTYPE_MONITOR))
+		return;
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_bss_info_changed(local, sdata, info, changed);
+	if (local->ops->bss_info_changed)
+		local->ops->bss_info_changed(&local->hw, &sdata->vif, info, changed);
+	trace_drv_return_void(local);
+}
+
+static inline u64 drv_prepare_multicast(struct ieee80211_local *local,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+					struct netdev_hw_addr_list *mc_list)
+#else
+					int mc_count,
+					struct dev_addr_list *mc_list)
+#endif
+{
+	u64 ret = 0;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+	trace_drv_prepare_multicast(local, mc_list->count);
+#else
+	trace_drv_prepare_multicast(local, mc_count);
+#endif
+
+	if (local->ops->prepare_multicast)
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+		ret = local->ops->prepare_multicast(&local->hw, mc_list);
+#else
+		ret = local->ops->prepare_multicast(&local->hw, mc_count,
+						    mc_list);
+#endif
+
+	trace_drv_return_u64(local, ret);
+
+	return ret;
+}
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+static inline void drv_set_multicast_list(struct ieee80211_local *local,
+					  struct ieee80211_sub_if_data *sdata,
+					  struct netdev_hw_addr_list *mc_list)
+{
+	bool allmulti = sdata->flags & IEEE80211_SDATA_ALLMULTI;
+
+	trace_drv_set_multicast_list(local, sdata, mc_list->count);
+
+	check_sdata_in_driver(sdata);
+
+	if (local->ops->set_multicast_list)
+		local->ops->set_multicast_list(&local->hw, &sdata->vif,
+					       allmulti, mc_list);
+	trace_drv_return_void(local);
+}
+#else
+static inline void drv_set_multicast_list(struct ieee80211_local *local,
+					  struct ieee80211_sub_if_data *sdata,
+					  int mc_count, struct dev_addr_list *ha)
+{
+	bool allmulti = sdata->flags & IEEE80211_SDATA_ALLMULTI;
+
+	trace_drv_set_multicast_list(local, sdata, mc_count);
+
+	check_sdata_in_driver(sdata);
+
+	if (local->ops->set_multicast_list)
+		local->ops->set_multicast_list(&local->hw, &sdata->vif,
+					       allmulti, mc_count, ha);
+	trace_drv_return_void(local);
+}
+#endif
+
+static inline void drv_configure_filter(struct ieee80211_local *local,
+					unsigned int changed_flags,
+					unsigned int *total_flags,
+					u64 multicast)
+{
+	might_sleep();
+
+	trace_drv_configure_filter(local, changed_flags, total_flags,
+				   multicast);
+	local->ops->configure_filter(&local->hw, changed_flags, total_flags,
+				     multicast);
+	trace_drv_return_void(local);
+}
+
+static inline int drv_set_tim(struct ieee80211_local *local,
+			      struct ieee80211_sta *sta, bool set)
+{
+	int ret = 0;
+	trace_drv_set_tim(local, sta, set);
+	if (local->ops->set_tim)
+		ret = local->ops->set_tim(&local->hw, sta, set);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline int drv_set_key(struct ieee80211_local *local,
+			      enum set_key_cmd cmd,
+			      struct ieee80211_sub_if_data *sdata,
+			      struct ieee80211_sta *sta,
+			      struct ieee80211_key_conf *key)
+{
+	int ret;
+
+	might_sleep();
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	trace_drv_set_key(local, cmd, sdata, sta, key);
+	ret = local->ops->set_key(&local->hw, cmd, &sdata->vif, sta, key);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_update_tkip_key(struct ieee80211_local *local,
+				       struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_key_conf *conf,
+				       struct sta_info *sta, u32 iv32,
+				       u16 *phase1key)
+{
+	struct ieee80211_sta *ista = NULL;
+
+	if (sta)
+		ista = &sta->sta;
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	trace_drv_update_tkip_key(local, sdata, conf, ista, iv32);
+	if (local->ops->update_tkip_key)
+		local->ops->update_tkip_key(&local->hw, &sdata->vif, conf,
+					    ista, iv32, phase1key);
+	trace_drv_return_void(local);
+}
+
+static inline int drv_hw_scan(struct ieee80211_local *local,
+			      struct ieee80211_sub_if_data *sdata,
+			      struct cfg80211_scan_request *req)
+{
+	int ret;
+
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_hw_scan(local, sdata);
+	ret = local->ops->hw_scan(&local->hw, &sdata->vif, req);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_cancel_hw_scan(struct ieee80211_local *local,
+				      struct ieee80211_sub_if_data *sdata)
+{
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_cancel_hw_scan(local, sdata);
+	local->ops->cancel_hw_scan(&local->hw, &sdata->vif);
+	trace_drv_return_void(local);
+}
+
+static inline int
+drv_sched_scan_start(struct ieee80211_local *local,
+		     struct ieee80211_sub_if_data *sdata,
+		     struct cfg80211_sched_scan_request *req,
+		     struct ieee80211_sched_scan_ies *ies)
+{
+	int ret;
+
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_sched_scan_start(local, sdata);
+	ret = local->ops->sched_scan_start(&local->hw, &sdata->vif,
+					      req, ies);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_sched_scan_stop(struct ieee80211_local *local,
+				       struct ieee80211_sub_if_data *sdata)
+{
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_sched_scan_stop(local, sdata);
+	local->ops->sched_scan_stop(&local->hw, &sdata->vif);
+	trace_drv_return_void(local);
+}
+
+static inline void drv_sw_scan_start(struct ieee80211_local *local)
+{
+	might_sleep();
+
+	trace_drv_sw_scan_start(local);
+	if (local->ops->sw_scan_start)
+		local->ops->sw_scan_start(&local->hw);
+	trace_drv_return_void(local);
+}
+
+static inline void drv_sw_scan_complete(struct ieee80211_local *local)
+{
+	might_sleep();
+
+	trace_drv_sw_scan_complete(local);
+	if (local->ops->sw_scan_complete)
+		local->ops->sw_scan_complete(&local->hw);
+	trace_drv_return_void(local);
+}
+
+static inline int drv_get_stats(struct ieee80211_local *local,
+				struct ieee80211_low_level_stats *stats)
+{
+	int ret = -EOPNOTSUPP;
+
+	might_sleep();
+
+	if (local->ops->get_stats)
+		ret = local->ops->get_stats(&local->hw, stats);
+	trace_drv_get_stats(local, stats, ret);
+
+	return ret;
+}
+
+static inline void drv_get_tkip_seq(struct ieee80211_local *local,
+				    u8 hw_key_idx, u32 *iv32, u16 *iv16)
+{
+	if (local->ops->get_tkip_seq)
+		local->ops->get_tkip_seq(&local->hw, hw_key_idx, iv32, iv16);
+	trace_drv_get_tkip_seq(local, hw_key_idx, iv32, iv16);
+}
+
+static inline int drv_set_frag_threshold(struct ieee80211_local *local,
+					u32 value)
+{
+	int ret = 0;
+
+	might_sleep();
+
+	trace_drv_set_frag_threshold(local, value);
+	if (local->ops->set_frag_threshold)
+		ret = local->ops->set_frag_threshold(&local->hw, value);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline int drv_set_rts_threshold(struct ieee80211_local *local,
+					u32 value)
+{
+	int ret = 0;
+
+	might_sleep();
+
+	trace_drv_set_rts_threshold(local, value);
+	if (local->ops->set_rts_threshold)
+		ret = local->ops->set_rts_threshold(&local->hw, value);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline int drv_set_coverage_class(struct ieee80211_local *local,
+					 u8 value)
+{
+	int ret = 0;
+	might_sleep();
+
+	trace_drv_set_coverage_class(local, value);
+	if (local->ops->set_coverage_class)
+		local->ops->set_coverage_class(&local->hw, value);
+	else
+		ret = -EOPNOTSUPP;
+
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_sta_notify(struct ieee80211_local *local,
+				  struct ieee80211_sub_if_data *sdata,
+				  enum sta_notify_cmd cmd,
+				  struct ieee80211_sta *sta)
+{
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	trace_drv_sta_notify(local, sdata, cmd, sta);
+	if (local->ops->sta_notify)
+		local->ops->sta_notify(&local->hw, &sdata->vif, cmd, sta);
+	trace_drv_return_void(local);
+}
+
+static inline int drv_sta_add(struct ieee80211_local *local,
+			      struct ieee80211_sub_if_data *sdata,
+			      struct ieee80211_sta *sta)
+{
+	int ret = 0;
+
+	might_sleep();
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	trace_drv_sta_add(local, sdata, sta);
+	if (local->ops->sta_add)
+		ret = local->ops->sta_add(&local->hw, &sdata->vif, sta);
+
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline void drv_sta_remove(struct ieee80211_local *local,
+				  struct ieee80211_sub_if_data *sdata,
+				  struct ieee80211_sta *sta)
+{
+	might_sleep();
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	trace_drv_sta_remove(local, sdata, sta);
+	if (local->ops->sta_remove)
+		local->ops->sta_remove(&local->hw, &sdata->vif, sta);
+
+	trace_drv_return_void(local);
+}
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+static inline void drv_sta_add_debugfs(struct ieee80211_local *local,
+				       struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_sta *sta,
+				       struct dentry *dir)
+{
+	might_sleep();
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	if (local->ops->sta_add_debugfs)
+		local->ops->sta_add_debugfs(&local->hw, &sdata->vif,
+					    sta, dir);
+}
+
+static inline void drv_sta_remove_debugfs(struct ieee80211_local *local,
+					  struct ieee80211_sub_if_data *sdata,
+					  struct ieee80211_sta *sta,
+					  struct dentry *dir)
+{
+	might_sleep();
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	if (local->ops->sta_remove_debugfs)
+		local->ops->sta_remove_debugfs(&local->hw, &sdata->vif,
+					       sta, dir);
+}
+#endif
+
+static inline __must_check
+int drv_sta_state(struct ieee80211_local *local,
+		  struct ieee80211_sub_if_data *sdata,
+		  struct sta_info *sta,
+		  enum ieee80211_sta_state old_state,
+		  enum ieee80211_sta_state new_state)
+{
+	int ret = 0;
+
+	might_sleep();
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
+	if (local->ops->sta_state) {
+		ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
+					    old_state, new_state);
+	} else if (old_state == IEEE80211_STA_AUTH &&
+		   new_state == IEEE80211_STA_ASSOC) {
+		ret = drv_sta_add(local, sdata, &sta->sta);
+		if (ret == 0)
+			sta->uploaded = true;
+	} else if (old_state == IEEE80211_STA_ASSOC &&
+		   new_state == IEEE80211_STA_AUTH) {
+		drv_sta_remove(local, sdata, &sta->sta);
+	}
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_sta_rc_update(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata,
+				     struct ieee80211_sta *sta, u32 changed)
+{
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
+		(sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+		 sdata->vif.type != NL80211_IFTYPE_MESH_POINT));
+
+	trace_drv_sta_rc_update(local, sdata, sta, changed);
+	if (local->ops->sta_rc_update)
+		local->ops->sta_rc_update(&local->hw, &sdata->vif,
+					  sta, changed);
+
+	trace_drv_return_void(local);
+}
+
+static inline int drv_conf_tx(struct ieee80211_local *local,
+			      struct ieee80211_sub_if_data *sdata, u16 ac,
+			      const struct ieee80211_tx_queue_params *params)
+{
+	int ret = -EOPNOTSUPP;
+
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_conf_tx(local, sdata, ac, params);
+	if (local->ops->conf_tx)
+		ret = local->ops->conf_tx(&local->hw, &sdata->vif,
+					  ac, params);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline u64 drv_get_tsf(struct ieee80211_local *local,
+			      struct ieee80211_sub_if_data *sdata)
+{
+	u64 ret = -1ULL;
+
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_get_tsf(local, sdata);
+	if (local->ops->get_tsf)
+		ret = local->ops->get_tsf(&local->hw, &sdata->vif);
+	trace_drv_return_u64(local, ret);
+	return ret;
+}
+
+static inline void drv_set_tsf(struct ieee80211_local *local,
+			       struct ieee80211_sub_if_data *sdata,
+			       u64 tsf)
+{
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_set_tsf(local, sdata, tsf);
+	if (local->ops->set_tsf)
+		local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
+	trace_drv_return_void(local);
+}
+
+static inline void drv_reset_tsf(struct ieee80211_local *local,
+				 struct ieee80211_sub_if_data *sdata)
+{
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_reset_tsf(local, sdata);
+	if (local->ops->reset_tsf)
+		local->ops->reset_tsf(&local->hw, &sdata->vif);
+	trace_drv_return_void(local);
+}
+
+static inline int drv_tx_last_beacon(struct ieee80211_local *local)
+{
+	int ret = 0; /* default unsupported op for less congestion */
+
+	might_sleep();
+
+	trace_drv_tx_last_beacon(local);
+	if (local->ops->tx_last_beacon)
+		ret = local->ops->tx_last_beacon(&local->hw);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline int drv_ampdu_action(struct ieee80211_local *local,
+				   struct ieee80211_sub_if_data *sdata,
+				   enum ieee80211_ampdu_mlme_action action,
+				   struct ieee80211_sta *sta, u16 tid,
+				   u16 *ssn, u8 buf_size)
+{
+	int ret = -EOPNOTSUPP;
+
+	might_sleep();
+
+	sdata = get_bss_sdata(sdata);
+	check_sdata_in_driver(sdata);
+
+	trace_drv_ampdu_action(local, sdata, action, sta, tid, ssn, buf_size);
+
+	if (local->ops->ampdu_action)
+		ret = local->ops->ampdu_action(&local->hw, &sdata->vif, action,
+					       sta, tid, ssn, buf_size);
+
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline int drv_get_survey(struct ieee80211_local *local, int idx,
+				struct survey_info *survey)
+{
+	int ret = -EOPNOTSUPP;
+
+	trace_drv_get_survey(local, idx, survey);
+
+	if (local->ops->get_survey)
+		ret = local->ops->get_survey(&local->hw, idx, survey);
+
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline void drv_rfkill_poll(struct ieee80211_local *local)
+{
+	might_sleep();
+
+	if (local->ops->rfkill_poll)
+		local->ops->rfkill_poll(&local->hw);
+}
+
+static inline void drv_flush(struct ieee80211_local *local,
+			     u32 queues, bool drop)
+{
+	might_sleep();
+
+	trace_drv_flush(local, queues, drop);
+	if (local->ops->flush)
+		local->ops->flush(&local->hw, queues, drop);
+	trace_drv_return_void(local);
+}
+
+static inline void drv_channel_switch(struct ieee80211_local *local,
+				     struct ieee80211_channel_switch *ch_switch)
+{
+	might_sleep();
+
+	trace_drv_channel_switch(local, ch_switch);
+	local->ops->channel_switch(&local->hw, ch_switch);
+	trace_drv_return_void(local);
+}
+
+
+static inline int drv_set_antenna(struct ieee80211_local *local,
+				  u32 tx_ant, u32 rx_ant)
+{
+	int ret = -EOPNOTSUPP;
+	might_sleep();
+	if (local->ops->set_antenna)
+		ret = local->ops->set_antenna(&local->hw, tx_ant, rx_ant);
+	trace_drv_set_antenna(local, tx_ant, rx_ant, ret);
+	return ret;
+}
+
+static inline int drv_get_antenna(struct ieee80211_local *local,
+				  u32 *tx_ant, u32 *rx_ant)
+{
+	int ret = -EOPNOTSUPP;
+	might_sleep();
+	if (local->ops->get_antenna)
+		ret = local->ops->get_antenna(&local->hw, tx_ant, rx_ant);
+	trace_drv_get_antenna(local, *tx_ant, *rx_ant, ret);
+	return ret;
+}
+
+static inline int drv_remain_on_channel(struct ieee80211_local *local,
+					struct ieee80211_sub_if_data *sdata,
+					struct ieee80211_channel *chan,
+					unsigned int duration,
+					enum ieee80211_roc_type type)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_remain_on_channel(local, sdata, chan, duration, type);
+	ret = local->ops->remain_on_channel(&local->hw, &sdata->vif,
+					    chan, duration, type);
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline int drv_cancel_remain_on_channel(struct ieee80211_local *local)
+{
+	int ret;
+
+	might_sleep();
+
+	trace_drv_cancel_remain_on_channel(local);
+	ret = local->ops->cancel_remain_on_channel(&local->hw);
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline int drv_set_ringparam(struct ieee80211_local *local,
+				    u32 tx, u32 rx)
+{
+	int ret = -ENOTSUPP;
+
+	might_sleep();
+
+	trace_drv_set_ringparam(local, tx, rx);
+	if (local->ops->set_ringparam)
+		ret = local->ops->set_ringparam(&local->hw, tx, rx);
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline void drv_get_ringparam(struct ieee80211_local *local,
+				     u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
+{
+	might_sleep();
+
+	trace_drv_get_ringparam(local, tx, tx_max, rx, rx_max);
+	if (local->ops->get_ringparam)
+		local->ops->get_ringparam(&local->hw, tx, tx_max, rx, rx_max);
+	trace_drv_return_void(local);
+}
+
+static inline bool drv_tx_frames_pending(struct ieee80211_local *local)
+{
+	bool ret = false;
+
+	might_sleep();
+
+	trace_drv_tx_frames_pending(local);
+	if (local->ops->tx_frames_pending)
+		ret = local->ops->tx_frames_pending(&local->hw);
+	trace_drv_return_bool(local, ret);
+
+	return ret;
+}
+
+static inline int drv_set_bitrate_mask(struct ieee80211_local *local,
+				       struct ieee80211_sub_if_data *sdata,
+				       const struct cfg80211_bitrate_mask *mask)
+{
+	int ret = -EOPNOTSUPP;
+
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_set_bitrate_mask(local, sdata, mask);
+	if (local->ops->set_bitrate_mask)
+		ret = local->ops->set_bitrate_mask(&local->hw,
+						   &sdata->vif, mask);
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline void drv_set_rekey_data(struct ieee80211_local *local,
+				      struct ieee80211_sub_if_data *sdata,
+				      struct cfg80211_gtk_rekey_data *data)
+{
+	check_sdata_in_driver(sdata);
+
+	trace_drv_set_rekey_data(local, sdata, data);
+	if (local->ops->set_rekey_data)
+		local->ops->set_rekey_data(&local->hw, &sdata->vif, data);
+	trace_drv_return_void(local);
+}
+
+static inline void drv_rssi_callback(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata,
+				     const enum ieee80211_rssi_event event)
+{
+	trace_drv_rssi_callback(local, sdata, event);
+	if (local->ops->rssi_callback)
+		local->ops->rssi_callback(&local->hw, &sdata->vif, event);
+	trace_drv_return_void(local);
+}
+
+static inline void
+drv_release_buffered_frames(struct ieee80211_local *local,
+			    struct sta_info *sta, u16 tids, int num_frames,
+			    enum ieee80211_frame_release_type reason,
+			    bool more_data)
+{
+	trace_drv_release_buffered_frames(local, &sta->sta, tids, num_frames,
+					  reason, more_data);
+	if (local->ops->release_buffered_frames)
+		local->ops->release_buffered_frames(&local->hw, &sta->sta, tids,
+						    num_frames, reason,
+						    more_data);
+	trace_drv_return_void(local);
+}
+
+static inline void
+drv_allow_buffered_frames(struct ieee80211_local *local,
+			  struct sta_info *sta, u16 tids, int num_frames,
+			  enum ieee80211_frame_release_type reason,
+			  bool more_data)
+{
+	trace_drv_allow_buffered_frames(local, &sta->sta, tids, num_frames,
+					reason, more_data);
+	if (local->ops->allow_buffered_frames)
+		local->ops->allow_buffered_frames(&local->hw, &sta->sta,
+						  tids, num_frames, reason,
+						  more_data);
+	trace_drv_return_void(local);
+}
+
+static inline int drv_get_rssi(struct ieee80211_local *local,
+				struct ieee80211_sub_if_data *sdata,
+				struct ieee80211_sta *sta,
+				s8 *rssi_dbm)
+{
+	int ret;
+
+	might_sleep();
+
+	ret = local->ops->get_rssi(&local->hw, &sdata->vif, sta, rssi_dbm);
+	trace_drv_get_rssi(local, sta, *rssi_dbm, ret);
+
+	return ret;
+}
+
+static inline void drv_mgd_prepare_tx(struct ieee80211_local *local,
+				      struct ieee80211_sub_if_data *sdata)
+{
+	might_sleep();
+
+	check_sdata_in_driver(sdata);
+	WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION);
+
+	trace_drv_mgd_prepare_tx(local, sdata);
+	if (local->ops->mgd_prepare_tx)
+		local->ops->mgd_prepare_tx(&local->hw, &sdata->vif);
+	trace_drv_return_void(local);
+}
+
+static inline int drv_add_chanctx(struct ieee80211_local *local,
+				  struct ieee80211_chanctx *ctx)
+{
+	int ret = -EOPNOTSUPP;
+
+	trace_drv_add_chanctx(local, ctx);
+	if (local->ops->add_chanctx)
+		ret = local->ops->add_chanctx(&local->hw, &ctx->conf);
+	trace_drv_return_int(local, ret);
+	if (!ret)
+		ctx->driver_present = true;
+
+	return ret;
+}
+
+static inline void drv_remove_chanctx(struct ieee80211_local *local,
+				      struct ieee80211_chanctx *ctx)
+{
+	trace_drv_remove_chanctx(local, ctx);
+	if (local->ops->remove_chanctx)
+		local->ops->remove_chanctx(&local->hw, &ctx->conf);
+	trace_drv_return_void(local);
+	ctx->driver_present = false;
+}
+
+static inline void drv_change_chanctx(struct ieee80211_local *local,
+				      struct ieee80211_chanctx *ctx,
+				      u32 changed)
+{
+	trace_drv_change_chanctx(local, ctx, changed);
+	if (local->ops->change_chanctx) {
+		WARN_ON_ONCE(!ctx->driver_present);
+		local->ops->change_chanctx(&local->hw, &ctx->conf, changed);
+	}
+	trace_drv_return_void(local);
+}
+
+static inline int drv_assign_vif_chanctx(struct ieee80211_local *local,
+					 struct ieee80211_sub_if_data *sdata,
+					 struct ieee80211_chanctx *ctx)
+{
+	int ret = 0;
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_assign_vif_chanctx(local, sdata, ctx);
+	if (local->ops->assign_vif_chanctx) {
+		WARN_ON_ONCE(!ctx->driver_present);
+		ret = local->ops->assign_vif_chanctx(&local->hw,
+						     &sdata->vif,
+						     &ctx->conf);
+	}
+	trace_drv_return_int(local, ret);
+
+	return ret;
+}
+
+static inline void drv_unassign_vif_chanctx(struct ieee80211_local *local,
+					    struct ieee80211_sub_if_data *sdata,
+					    struct ieee80211_chanctx *ctx)
+{
+	check_sdata_in_driver(sdata);
+
+	trace_drv_unassign_vif_chanctx(local, sdata, ctx);
+	if (local->ops->unassign_vif_chanctx) {
+		WARN_ON_ONCE(!ctx->driver_present);
+		local->ops->unassign_vif_chanctx(&local->hw,
+						 &sdata->vif,
+						 &ctx->conf);
+	}
+	trace_drv_return_void(local);
+}
+
+static inline int drv_start_ap(struct ieee80211_local *local,
+			       struct ieee80211_sub_if_data *sdata)
+{
+	int ret = 0;
+
+	check_sdata_in_driver(sdata);
+
+	trace_drv_start_ap(local, sdata, &sdata->vif.bss_conf);
+	if (local->ops->start_ap)
+		ret = local->ops->start_ap(&local->hw, &sdata->vif);
+	trace_drv_return_int(local, ret);
+	return ret;
+}
+
+static inline void drv_stop_ap(struct ieee80211_local *local,
+			       struct ieee80211_sub_if_data *sdata)
+{
+	check_sdata_in_driver(sdata);
+
+	trace_drv_stop_ap(local, sdata);
+	if (local->ops->stop_ap)
+		local->ops->stop_ap(&local->hw, &sdata->vif);
+	trace_drv_return_void(local);
+}
+
+static inline void drv_restart_complete(struct ieee80211_local *local)
+{
+	might_sleep();
+
+	trace_drv_restart_complete(local);
+	if (local->ops->restart_complete)
+		local->ops->restart_complete(&local->hw);
+	trace_drv_return_void(local);
+}
+
+static inline void
+drv_set_default_unicast_key(struct ieee80211_local *local,
+			    struct ieee80211_sub_if_data *sdata,
+			    int key_idx)
+{
+	check_sdata_in_driver(sdata);
+
+	WARN_ON_ONCE(key_idx < -1 || key_idx > 3);
+
+	trace_drv_set_default_unicast_key(local, sdata, key_idx);
+	if (local->ops->set_default_unicast_key)
+		local->ops->set_default_unicast_key(&local->hw, &sdata->vif,
+						    key_idx);
+	trace_drv_return_void(local);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static inline void drv_ipv6_addr_change(struct ieee80211_local *local,
+					struct ieee80211_sub_if_data *sdata,
+					struct inet6_dev *idev)
+{
+	trace_drv_ipv6_addr_change(local, sdata);
+	if (local->ops->ipv6_addr_change)
+		local->ops->ipv6_addr_change(&local->hw, &sdata->vif, idev);
+	trace_drv_return_void(local);
+}
+#endif
+
+#endif /* __MAC80211_DRIVER_OPS */
diff --git a/net/mac80211/event.c b/net/mac80211/event.c
new file mode 100644
index 0000000..01ae759
--- /dev/null
+++ b/net/mac80211/event.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * mac80211 - events
+ */
+#include <net/cfg80211.h>
+#include "ieee80211_i.h"
+
+/*
+ * Indicate a failed Michael MIC to userspace. If the caller knows the TSC of
+ * the frame that generated the MIC failure (i.e., if it was provided by the
+ * driver or is still in the frame), it should provide that information.
+ */
+void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
+				     struct ieee80211_hdr *hdr, const u8 *tsc,
+				     gfp_t gfp)
+{
+	cfg80211_michael_mic_failure(sdata->dev, hdr->addr2,
+				     (hdr->addr1[0] & 0x01) ?
+				     NL80211_KEYTYPE_GROUP :
+				     NL80211_KEYTYPE_PAIRWISE,
+				     keyidx, tsc, gfp);
+}
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
new file mode 100644
index 0000000..af8cee0
--- /dev/null
+++ b/net/mac80211/ht.c
@@ -0,0 +1,457 @@
+/*
+ * HT handling
+ *
+ * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2007-2010, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ieee80211.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "rate.h"
+
+static void __check_htcap_disable(struct ieee80211_sub_if_data *sdata,
+				  struct ieee80211_sta_ht_cap *ht_cap,
+				  u16 flag)
+{
+	__le16 le_flag = cpu_to_le16(flag);
+	if (sdata->u.mgd.ht_capa_mask.cap_info & le_flag) {
+		if (!(sdata->u.mgd.ht_capa.cap_info & le_flag))
+			ht_cap->cap &= ~flag;
+	}
+}
+
+void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
+				     struct ieee80211_sta_ht_cap *ht_cap)
+{
+	u8 *scaps = (u8 *)(&sdata->u.mgd.ht_capa.mcs.rx_mask);
+	u8 *smask = (u8 *)(&sdata->u.mgd.ht_capa_mask.mcs.rx_mask);
+	int i;
+
+	if (!ht_cap->ht_supported)
+		return;
+
+	/* NOTE:  If you add more over-rides here, update register_hw
+	 * ht_capa_mod_msk logic in main.c as well.
+	 * And, if this method can ever change ht_cap.ht_supported, fix
+	 * the check in ieee80211_add_ht_ie.
+	 */
+
+	/* check for HT over-rides, MCS rates first. */
+	for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
+		u8 m = smask[i];
+		ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */
+		/* Add back rates that are supported */
+		ht_cap->mcs.rx_mask[i] |= (m & scaps[i]);
+	}
+
+	/* Force removal of HT-40 capabilities? */
+	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40);
+	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40);
+
+	/* Allow user to disable SGI-20 (SGI-40 is handled above) */
+	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_20);
+
+	/* Allow user to disable the max-AMSDU bit. */
+	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_MAX_AMSDU);
+
+	/* Allow user to decrease AMPDU factor */
+	if (sdata->u.mgd.ht_capa_mask.ampdu_params_info &
+	    IEEE80211_HT_AMPDU_PARM_FACTOR) {
+		u8 n = sdata->u.mgd.ht_capa.ampdu_params_info
+			& IEEE80211_HT_AMPDU_PARM_FACTOR;
+		if (n < ht_cap->ampdu_factor)
+			ht_cap->ampdu_factor = n;
+	}
+
+	/* Allow the user to increase AMPDU density. */
+	if (sdata->u.mgd.ht_capa_mask.ampdu_params_info &
+	    IEEE80211_HT_AMPDU_PARM_DENSITY) {
+		u8 n = (sdata->u.mgd.ht_capa.ampdu_params_info &
+			IEEE80211_HT_AMPDU_PARM_DENSITY)
+			>> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT;
+		if (n > ht_cap->ampdu_density)
+			ht_cap->ampdu_density = n;
+	}
+}
+
+
+bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_supported_band *sband,
+				       const struct ieee80211_ht_cap *ht_cap_ie,
+				       struct sta_info *sta)
+{
+	struct ieee80211_sta_ht_cap ht_cap, own_cap;
+	u8 ampdu_info, tx_mcs_set_cap;
+	int i, max_tx_streams;
+	bool changed;
+	enum ieee80211_sta_rx_bandwidth bw;
+	enum ieee80211_smps_mode smps_mode;
+
+	memset(&ht_cap, 0, sizeof(ht_cap));
+
+	if (!ht_cap_ie || !sband->ht_cap.ht_supported)
+		goto apply;
+
+	ht_cap.ht_supported = true;
+
+	own_cap = sband->ht_cap;
+
+	/*
+	 * If user has specified capability over-rides, take care
+	 * of that if the station we're setting up is the AP that
+	 * we advertised a restricted capability set to. Override
+	 * our own capabilities and then use those below.
+	 */
+	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+	    !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
+		ieee80211_apply_htcap_overrides(sdata, &own_cap);
+
+	/*
+	 * The bits listed in this expression should be
+	 * the same for the peer and us, if the station
+	 * advertises more then we can't use those thus
+	 * we mask them out.
+	 */
+	ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) &
+		(own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING |
+				 IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
+				 IEEE80211_HT_CAP_GRN_FLD |
+				 IEEE80211_HT_CAP_SGI_20 |
+				 IEEE80211_HT_CAP_SGI_40 |
+				 IEEE80211_HT_CAP_DSSSCCK40));
+
+	/*
+	 * The STBC bits are asymmetric -- if we don't have
+	 * TX then mask out the peer's RX and vice versa.
+	 */
+	if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC))
+		ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC;
+	if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC))
+		ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC;
+
+	ampdu_info = ht_cap_ie->ampdu_params_info;
+	ht_cap.ampdu_factor =
+		ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
+	ht_cap.ampdu_density =
+		(ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
+
+	/* own MCS TX capabilities */
+	tx_mcs_set_cap = own_cap.mcs.tx_params;
+
+	/* Copy peer MCS TX capabilities, the driver might need them. */
+	ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params;
+
+	/* can we TX with MCS rates? */
+	if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
+		goto apply;
+
+	/* Counting from 0, therefore +1 */
+	if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
+		max_tx_streams =
+			((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
+				>> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
+	else
+		max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
+
+	/*
+	 * 802.11n-2009 20.3.5 / 20.6 says:
+	 * - indices 0 to 7 and 32 are single spatial stream
+	 * - 8 to 31 are multiple spatial streams using equal modulation
+	 *   [8..15 for two streams, 16..23 for three and 24..31 for four]
+	 * - remainder are multiple spatial streams using unequal modulation
+	 */
+	for (i = 0; i < max_tx_streams; i++)
+		ht_cap.mcs.rx_mask[i] =
+			own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
+
+	if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
+		for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
+		     i < IEEE80211_HT_MCS_MASK_LEN; i++)
+			ht_cap.mcs.rx_mask[i] =
+				own_cap.mcs.rx_mask[i] &
+					ht_cap_ie->mcs.rx_mask[i];
+
+	/* handle MCS rate 32 too */
+	if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
+		ht_cap.mcs.rx_mask[32/8] |= 1;
+
+ apply:
+	changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
+
+	memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
+
+	switch (sdata->vif.bss_conf.chandef.width) {
+	default:
+		WARN_ON_ONCE(1);
+		/* fall through */
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_20:
+		bw = IEEE80211_STA_RX_BW_20;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+	case NL80211_CHAN_WIDTH_80:
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_160:
+		bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+				IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+		break;
+	}
+
+	if (bw != sta->sta.bandwidth)
+		changed = true;
+	sta->sta.bandwidth = bw;
+
+	sta->cur_max_bandwidth =
+		ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+				IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+
+	switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS)
+			>> IEEE80211_HT_CAP_SM_PS_SHIFT) {
+	case WLAN_HT_CAP_SM_PS_INVALID:
+	case WLAN_HT_CAP_SM_PS_STATIC:
+		smps_mode = IEEE80211_SMPS_STATIC;
+		break;
+	case WLAN_HT_CAP_SM_PS_DYNAMIC:
+		smps_mode = IEEE80211_SMPS_DYNAMIC;
+		break;
+	case WLAN_HT_CAP_SM_PS_DISABLED:
+		smps_mode = IEEE80211_SMPS_OFF;
+		break;
+	}
+
+	if (smps_mode != sta->sta.smps_mode)
+		changed = true;
+	sta->sta.smps_mode = smps_mode;
+
+	return changed;
+}
+
+void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
+					 enum ieee80211_agg_stop_reason reason)
+{
+	int i;
+
+	cancel_work_sync(&sta->ampdu_mlme.work);
+
+	for (i = 0; i <  IEEE80211_NUM_TIDS; i++) {
+		__ieee80211_stop_tx_ba_session(sta, i, reason);
+		__ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
+					       WLAN_REASON_QSTA_LEAVE_QBSS,
+					       reason != AGG_STOP_DESTROY_STA &&
+					       reason != AGG_STOP_PEER_REQUEST);
+	}
+}
+
+void ieee80211_ba_session_work(struct work_struct *work)
+{
+	struct sta_info *sta =
+		container_of(work, struct sta_info, ampdu_mlme.work);
+	struct tid_ampdu_tx *tid_tx;
+	int tid;
+
+	/*
+	 * When this flag is set, new sessions should be
+	 * blocked, and existing sessions will be torn
+	 * down by the code that set the flag, so this
+	 * need not run.
+	 */
+	if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
+		return;
+
+	mutex_lock(&sta->ampdu_mlme.mtx);
+	for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
+		if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
+			___ieee80211_stop_rx_ba_session(
+				sta, tid, WLAN_BACK_RECIPIENT,
+				WLAN_REASON_QSTA_TIMEOUT, true);
+
+		if (test_and_clear_bit(tid,
+				       sta->ampdu_mlme.tid_rx_stop_requested))
+			___ieee80211_stop_rx_ba_session(
+				sta, tid, WLAN_BACK_RECIPIENT,
+				WLAN_REASON_UNSPECIFIED, true);
+
+		tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
+		if (tid_tx) {
+			/*
+			 * Assign it over to the normal tid_tx array
+			 * where it "goes live".
+			 */
+			spin_lock_bh(&sta->lock);
+
+			sta->ampdu_mlme.tid_start_tx[tid] = NULL;
+			/* could there be a race? */
+			if (sta->ampdu_mlme.tid_tx[tid])
+				kfree(tid_tx);
+			else
+				ieee80211_assign_tid_tx(sta, tid, tid_tx);
+			spin_unlock_bh(&sta->lock);
+
+			ieee80211_tx_ba_session_handle_start(sta, tid);
+			continue;
+		}
+
+		tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+		if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
+						 &tid_tx->state))
+			___ieee80211_stop_tx_ba_session(sta, tid,
+							AGG_STOP_LOCAL_REQUEST);
+	}
+	mutex_unlock(&sta->ampdu_mlme.mtx);
+}
+
+void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
+			  const u8 *da, u16 tid,
+			  u16 initiator, u16 reason_code)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	u16 params;
+
+	skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+	memset(mgmt, 0, 24);
+	memcpy(mgmt->da, da, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	if (sdata->vif.type == NL80211_IFTYPE_AP ||
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+	    sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
+		memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
+	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
+		memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+	else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+		memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
+
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+
+	skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
+
+	mgmt->u.action.category = WLAN_CATEGORY_BACK;
+	mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
+	params = (u16)(initiator << 11); 	/* bit 11 initiator */
+	params |= (u16)(tid << 12); 		/* bit 15:12 TID number */
+
+	mgmt->u.action.u.delba.params = cpu_to_le16(params);
+	mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
+
+	ieee80211_tx_skb_tid(sdata, skb, tid);
+}
+
+void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
+			     struct sta_info *sta,
+			     struct ieee80211_mgmt *mgmt, size_t len)
+{
+	u16 tid, params;
+	u16 initiator;
+
+	params = le16_to_cpu(mgmt->u.action.u.delba.params);
+	tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
+	initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
+
+	ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n",
+			   mgmt->sa, initiator ? "initiator" : "recipient",
+			   tid,
+			   le16_to_cpu(mgmt->u.action.u.delba.reason_code));
+
+	if (initiator == WLAN_BACK_INITIATOR)
+		__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
+					       true);
+	else
+		__ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
+}
+
+int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
+			       enum ieee80211_smps_mode smps, const u8 *da,
+			       const u8 *bssid)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *action_frame;
+
+	/* 27 = header + category + action + smps mode */
+	skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+	action_frame = (void *)skb_put(skb, 27);
+	memcpy(action_frame->da, da, ETH_ALEN);
+	memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
+	memcpy(action_frame->bssid, bssid, ETH_ALEN);
+	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+						  IEEE80211_STYPE_ACTION);
+	action_frame->u.action.category = WLAN_CATEGORY_HT;
+	action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
+	switch (smps) {
+	case IEEE80211_SMPS_AUTOMATIC:
+	case IEEE80211_SMPS_NUM_MODES:
+		WARN_ON(1);
+	case IEEE80211_SMPS_OFF:
+		action_frame->u.action.u.ht_smps.smps_control =
+				WLAN_HT_SMPS_CONTROL_DISABLED;
+		break;
+	case IEEE80211_SMPS_STATIC:
+		action_frame->u.action.u.ht_smps.smps_control =
+				WLAN_HT_SMPS_CONTROL_STATIC;
+		break;
+	case IEEE80211_SMPS_DYNAMIC:
+		action_frame->u.action.u.ht_smps.smps_control =
+				WLAN_HT_SMPS_CONTROL_DYNAMIC;
+		break;
+	}
+
+	/* we'll do more on status of this frame */
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+	ieee80211_tx_skb(sdata, skb);
+
+	return 0;
+}
+
+void ieee80211_request_smps_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.request_smps_work);
+
+	mutex_lock(&sdata->u.mgd.mtx);
+	__ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode);
+	mutex_unlock(&sdata->u.mgd.mtx);
+}
+
+void ieee80211_request_smps(struct ieee80211_vif *vif,
+			    enum ieee80211_smps_mode smps_mode)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+		return;
+
+	if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
+		smps_mode = IEEE80211_SMPS_AUTOMATIC;
+
+	if (sdata->u.mgd.driver_smps_mode == smps_mode)
+		return;
+
+	sdata->u.mgd.driver_smps_mode = smps_mode;
+
+	ieee80211_queue_work(&sdata->local->hw,
+			     &sdata->u.mgd.request_smps_work);
+}
+/* this might change ... don't want non-open drivers using it */
+EXPORT_SYMBOL_GPL(ieee80211_request_smps);
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
new file mode 100644
index 0000000..3052672
--- /dev/null
+++ b/net/mac80211/ibss.c
@@ -0,0 +1,1180 @@
+/*
+ * IBSS mode implementation
+ * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
+ * Copyright 2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2009, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <net/mac80211.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+
+#define IEEE80211_SCAN_INTERVAL (2 * HZ)
+#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
+
+#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
+#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
+
+#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
+
+
+static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
+				      const u8 *bssid, const int beacon_int,
+				      struct ieee80211_channel *chan,
+				      const u32 basic_rates,
+				      const u16 capability, u64 tsf,
+				      bool creator)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+	int rates, i;
+	struct ieee80211_mgmt *mgmt;
+	u8 *pos;
+	struct ieee80211_supported_band *sband;
+	struct cfg80211_bss *bss;
+	u32 bss_change;
+	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
+	struct cfg80211_chan_def chandef;
+	struct beacon_data *presp;
+	int frame_len;
+
+	lockdep_assert_held(&ifibss->mtx);
+
+	/* Reset own TSF to allow time synchronization work. */
+	drv_reset_tsf(local, sdata);
+
+	if (!ether_addr_equal(ifibss->bssid, bssid))
+		sta_info_flush(sdata);
+
+	/* if merging, indicate to driver that we leave the old IBSS */
+	if (sdata->vif.bss_conf.ibss_joined) {
+		sdata->vif.bss_conf.ibss_joined = false;
+		sdata->vif.bss_conf.ibss_creator = false;
+		sdata->vif.bss_conf.enable_beacon = false;
+		netif_carrier_off(sdata->dev);
+		ieee80211_bss_info_change_notify(sdata,
+						 BSS_CHANGED_IBSS |
+						 BSS_CHANGED_BEACON_ENABLED);
+	}
+
+	presp = rcu_dereference_protected(ifibss->presp,
+					  lockdep_is_held(&ifibss->mtx));
+	rcu_assign_pointer(ifibss->presp, NULL);
+	if (presp)
+		kfree_rcu(presp, rcu_head);
+
+	sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0;
+
+	cfg80211_chandef_create(&chandef, chan, ifibss->channel_type);
+	if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) {
+		chandef.width = NL80211_CHAN_WIDTH_20;
+		chandef.center_freq1 = chan->center_freq;
+	}
+
+	ieee80211_vif_release_channel(sdata);
+	if (ieee80211_vif_use_channel(sdata, &chandef,
+				      ifibss->fixed_channel ?
+					IEEE80211_CHANCTX_SHARED :
+					IEEE80211_CHANCTX_EXCLUSIVE)) {
+		sdata_info(sdata, "Failed to join IBSS, no channel context\n");
+		return;
+	}
+
+	memcpy(ifibss->bssid, bssid, ETH_ALEN);
+
+	sband = local->hw.wiphy->bands[chan->band];
+
+	/* Build IBSS probe response */
+	frame_len = sizeof(struct ieee80211_hdr_3addr) +
+		    12 /* struct ieee80211_mgmt.u.beacon */ +
+		    2 + IEEE80211_MAX_SSID_LEN /* max SSID */ +
+		    2 + 8 /* max Supported Rates */ +
+		    3 /* max DS params */ +
+		    4 /* IBSS params */ +
+		    2 + (IEEE80211_MAX_SUPP_RATES - 8) +
+		    2 + sizeof(struct ieee80211_ht_cap) +
+		    2 + sizeof(struct ieee80211_ht_operation) +
+		    ifibss->ie_len;
+	presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL);
+	if (!presp)
+		return;
+
+	presp->head = (void *)(presp + 1);
+
+	mgmt = (void *) presp->head;
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_PROBE_RESP);
+	eth_broadcast_addr(mgmt->da);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
+	mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int);
+	mgmt->u.beacon.timestamp = cpu_to_le64(tsf);
+	mgmt->u.beacon.capab_info = cpu_to_le16(capability);
+
+	pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable);
+
+	*pos++ = WLAN_EID_SSID;
+	*pos++ = ifibss->ssid_len;
+	memcpy(pos, ifibss->ssid, ifibss->ssid_len);
+	pos += ifibss->ssid_len;
+
+	rates = min_t(int, 8, sband->n_bitrates);
+	*pos++ = WLAN_EID_SUPP_RATES;
+	*pos++ = rates;
+	for (i = 0; i < rates; i++) {
+		int rate = sband->bitrates[i].bitrate;
+		u8 basic = 0;
+		if (basic_rates & BIT(i))
+			basic = 0x80;
+		*pos++ = basic | (u8) (rate / 5);
+	}
+
+	if (sband->band == IEEE80211_BAND_2GHZ) {
+		*pos++ = WLAN_EID_DS_PARAMS;
+		*pos++ = 1;
+		*pos++ = ieee80211_frequency_to_channel(chan->center_freq);
+	}
+
+	*pos++ = WLAN_EID_IBSS_PARAMS;
+	*pos++ = 2;
+	/* FIX: set ATIM window based on scan results */
+	*pos++ = 0;
+	*pos++ = 0;
+
+	if (sband->n_bitrates > 8) {
+		*pos++ = WLAN_EID_EXT_SUPP_RATES;
+		*pos++ = sband->n_bitrates - 8;
+		for (i = 8; i < sband->n_bitrates; i++) {
+			int rate = sband->bitrates[i].bitrate;
+			u8 basic = 0;
+			if (basic_rates & BIT(i))
+				basic = 0x80;
+			*pos++ = basic | (u8) (rate / 5);
+		}
+	}
+
+	if (ifibss->ie_len) {
+		memcpy(pos, ifibss->ie, ifibss->ie_len);
+		pos += ifibss->ie_len;
+	}
+
+	/* add HT capability and information IEs */
+	if (chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
+	    sband->ht_cap.ht_supported) {
+		pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
+						sband->ht_cap.cap);
+		/*
+		 * Note: According to 802.11n-2009 9.13.3.1, HT Protection
+		 * field and RIFS Mode are reserved in IBSS mode, therefore
+		 * keep them at 0
+		 */
+		pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap,
+						 &chandef, 0);
+	}
+
+	if (local->hw.queues >= IEEE80211_NUM_ACS) {
+		*pos++ = WLAN_EID_VENDOR_SPECIFIC;
+		*pos++ = 7; /* len */
+		*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
+		*pos++ = 0x50;
+		*pos++ = 0xf2;
+		*pos++ = 2; /* WME */
+		*pos++ = 0; /* WME info */
+		*pos++ = 1; /* WME ver */
+		*pos++ = 0; /* U-APSD no in use */
+	}
+
+	presp->head_len = pos - presp->head;
+	if (WARN_ON(presp->head_len > frame_len))
+		return;
+
+	rcu_assign_pointer(ifibss->presp, presp);
+
+	sdata->vif.bss_conf.enable_beacon = true;
+	sdata->vif.bss_conf.beacon_int = beacon_int;
+	sdata->vif.bss_conf.basic_rates = basic_rates;
+	sdata->vif.bss_conf.ssid_len = ifibss->ssid_len;
+	memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len);
+	bss_change = BSS_CHANGED_BEACON_INT;
+	bss_change |= ieee80211_reset_erp_info(sdata);
+	bss_change |= BSS_CHANGED_BSSID;
+	bss_change |= BSS_CHANGED_BEACON;
+	bss_change |= BSS_CHANGED_BEACON_ENABLED;
+	bss_change |= BSS_CHANGED_BASIC_RATES;
+	bss_change |= BSS_CHANGED_HT;
+	bss_change |= BSS_CHANGED_IBSS;
+	bss_change |= BSS_CHANGED_SSID;
+
+	/*
+	 * In 5 GHz/802.11a, we can always use short slot time.
+	 * (IEEE 802.11-2012 18.3.8.7)
+	 *
+	 * In 2.4GHz, we must always use long slots in IBSS for compatibility
+	 * reasons.
+	 * (IEEE 802.11-2012 19.4.5)
+	 *
+	 * HT follows these specifications (IEEE 802.11-2012 20.3.18)
+	 */
+	sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ;
+	bss_change |= BSS_CHANGED_ERP_SLOT;
+
+	sdata->vif.bss_conf.ibss_joined = true;
+	sdata->vif.bss_conf.ibss_creator = creator;
+	ieee80211_bss_info_change_notify(sdata, bss_change);
+
+	ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates);
+
+	ifibss->state = IEEE80211_IBSS_MLME_JOINED;
+	mod_timer(&ifibss->timer,
+		  round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
+
+	bss = cfg80211_inform_bss_frame(local->hw.wiphy, chan,
+					mgmt, presp->head_len, 0, GFP_KERNEL);
+	cfg80211_put_bss(local->hw.wiphy, bss);
+	netif_carrier_on(sdata->dev);
+	cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL);
+}
+
+static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_bss *bss)
+{
+	struct cfg80211_bss *cbss =
+		container_of((void *)bss, struct cfg80211_bss, priv);
+	struct ieee80211_supported_band *sband;
+	u32 basic_rates;
+	int i, j;
+	u16 beacon_int = cbss->beacon_interval;
+	const struct cfg80211_bss_ies *ies;
+	u64 tsf;
+
+	lockdep_assert_held(&sdata->u.ibss.mtx);
+
+	if (beacon_int < 10)
+		beacon_int = 10;
+
+	sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
+
+	basic_rates = 0;
+
+	for (i = 0; i < bss->supp_rates_len; i++) {
+		int rate = (bss->supp_rates[i] & 0x7f) * 5;
+		bool is_basic = !!(bss->supp_rates[i] & 0x80);
+
+		for (j = 0; j < sband->n_bitrates; j++) {
+			if (sband->bitrates[j].bitrate == rate) {
+				if (is_basic)
+					basic_rates |= BIT(j);
+				break;
+			}
+		}
+	}
+
+	rcu_read_lock();
+	ies = rcu_dereference(cbss->ies);
+	tsf = ies->tsf;
+	rcu_read_unlock();
+
+	__ieee80211_sta_join_ibss(sdata, cbss->bssid,
+				  beacon_int,
+				  cbss->channel,
+				  basic_rates,
+				  cbss->capability,
+				  tsf, false);
+}
+
+static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta,
+						  bool auth)
+	__acquires(RCU)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	u8 addr[ETH_ALEN];
+
+	memcpy(addr, sta->sta.addr, ETH_ALEN);
+
+	ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr);
+
+	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+	/* authorize the station only if the network is not RSN protected. If
+	 * not wait for the userspace to authorize it */
+	if (!sta->sdata->u.ibss.control_port)
+		sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+
+	rate_control_rate_init(sta);
+
+	/* If it fails, maybe we raced another insertion? */
+	if (sta_info_insert_rcu(sta))
+		return sta_info_get(sdata, addr);
+	if (auth && !sdata->u.ibss.auth_frame_registrations) {
+		ibss_dbg(sdata,
+			 "TX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=1)\n",
+			 sdata->vif.addr, addr, sdata->u.ibss.bssid);
+		ieee80211_send_auth(sdata, 1, WLAN_AUTH_OPEN, 0, NULL, 0,
+				    addr, sdata->u.ibss.bssid, NULL, 0, 0, 0);
+	}
+	return sta;
+}
+
+static struct sta_info *
+ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
+		       const u8 *bssid, const u8 *addr,
+		       u32 supp_rates, bool auth)
+	__acquires(RCU)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	int band;
+
+	/*
+	 * XXX: Consider removing the least recently used entry and
+	 * 	allow new one to be added.
+	 */
+	if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
+		net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
+				    sdata->name, addr);
+		rcu_read_lock();
+		return NULL;
+	}
+
+	if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) {
+		rcu_read_lock();
+		return NULL;
+	}
+
+	if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) {
+		rcu_read_lock();
+		return NULL;
+	}
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON_ONCE(!chanctx_conf))
+		return NULL;
+	band = chanctx_conf->def.chan->band;
+	rcu_read_unlock();
+
+	sta = sta_info_alloc(sdata, addr, GFP_KERNEL);
+	if (!sta) {
+		rcu_read_lock();
+		return NULL;
+	}
+
+	sta->last_rx = jiffies;
+
+	/* make sure mandatory rates are always added */
+	sta->sta.supp_rates[band] = supp_rates |
+			ieee80211_mandatory_rates(local, band);
+
+	return ieee80211_ibss_finish_sta(sta, auth);
+}
+
+static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata,
+					  struct ieee80211_mgmt *mgmt,
+					  size_t len)
+{
+	u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code);
+
+	if (len < IEEE80211_DEAUTH_FRAME_LEN)
+		return;
+
+	ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n",
+		 mgmt->sa, mgmt->da, mgmt->bssid, reason);
+	sta_info_destroy_addr(sdata, mgmt->sa);
+}
+
+static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
+					struct ieee80211_mgmt *mgmt,
+					size_t len)
+{
+	u16 auth_alg, auth_transaction;
+	struct sta_info *sta;
+	u8 deauth_frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	lockdep_assert_held(&sdata->u.ibss.mtx);
+
+	if (len < 24 + 6)
+		return;
+
+	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
+	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
+
+	ibss_dbg(sdata,
+		 "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n",
+		 mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction);
+
+	if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
+		return;
+
+	sta_info_destroy_addr(sdata, mgmt->sa);
+	sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 0, false);
+	rcu_read_unlock();
+
+	/*
+	 * if we have any problem in allocating the new station, we reply with a
+	 * DEAUTH frame to tell the other end that we had a problem
+	 */
+	if (!sta) {
+		ieee80211_send_deauth_disassoc(sdata, sdata->u.ibss.bssid,
+					       IEEE80211_STYPE_DEAUTH,
+					       WLAN_REASON_UNSPECIFIED, true,
+					       deauth_frame_buf);
+		return;
+	}
+
+	/*
+	 * IEEE 802.11 standard does not require authentication in IBSS
+	 * networks and most implementations do not seem to use it.
+	 * However, try to reply to authentication attempts if someone
+	 * has actually implemented this.
+	 */
+	ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0,
+			    mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0);
+}
+
+static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
+				  struct ieee80211_mgmt *mgmt, size_t len,
+				  struct ieee80211_rx_status *rx_status,
+				  struct ieee802_11_elems *elems)
+{
+	struct ieee80211_local *local = sdata->local;
+	int freq;
+	struct cfg80211_bss *cbss;
+	struct ieee80211_bss *bss;
+	struct sta_info *sta;
+	struct ieee80211_channel *channel;
+	u64 beacon_timestamp, rx_timestamp;
+	u32 supp_rates = 0;
+	enum ieee80211_band band = rx_status->band;
+	struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
+	bool rates_updated = false;
+
+	if (elems->ds_params)
+		freq = ieee80211_channel_to_frequency(elems->ds_params[0],
+						      band);
+	else
+		freq = rx_status->freq;
+
+	channel = ieee80211_get_channel(local->hw.wiphy, freq);
+
+	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+		return;
+
+	if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
+	    ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) {
+
+		rcu_read_lock();
+		sta = sta_info_get(sdata, mgmt->sa);
+
+		if (elems->supp_rates) {
+			supp_rates = ieee80211_sta_get_rates(local, elems,
+							     band, NULL);
+			if (sta) {
+				u32 prev_rates;
+
+				prev_rates = sta->sta.supp_rates[band];
+				/* make sure mandatory rates are always added */
+				sta->sta.supp_rates[band] = supp_rates |
+					ieee80211_mandatory_rates(local, band);
+
+				if (sta->sta.supp_rates[band] != prev_rates) {
+					ibss_dbg(sdata,
+						 "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n",
+						 sta->sta.addr, prev_rates,
+						 sta->sta.supp_rates[band]);
+					rates_updated = true;
+				}
+			} else {
+				rcu_read_unlock();
+				sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid,
+						mgmt->sa, supp_rates, true);
+			}
+		}
+
+		if (sta && elems->wmm_info)
+			set_sta_flag(sta, WLAN_STA_WME);
+
+		if (sta && elems->ht_operation && elems->ht_cap_elem &&
+		    sdata->u.ibss.channel_type != NL80211_CHAN_NO_HT) {
+			/* we both use HT */
+			struct ieee80211_ht_cap htcap_ie;
+			struct cfg80211_chan_def chandef;
+
+			ieee80211_ht_oper_to_chandef(channel,
+						     elems->ht_operation,
+						     &chandef);
+
+			memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie));
+
+			/*
+			 * fall back to HT20 if we don't use or use
+			 * the other extension channel
+			 */
+			if (cfg80211_get_chandef_type(&chandef) !=
+						sdata->u.ibss.channel_type)
+				htcap_ie.cap_info &=
+					cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40);
+
+			rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(
+						sdata, sband, &htcap_ie, sta);
+		}
+
+		if (sta && rates_updated) {
+			drv_sta_rc_update(local, sdata, &sta->sta,
+					  IEEE80211_RC_SUPP_RATES_CHANGED);
+			rate_control_rate_init(sta);
+		}
+
+		rcu_read_unlock();
+	}
+
+	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
+					channel);
+	if (!bss)
+		return;
+
+	cbss = container_of((void *)bss, struct cfg80211_bss, priv);
+
+	/* same for beacon and probe response */
+	beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
+
+	/* check if we need to merge IBSS */
+
+	/* we use a fixed BSSID */
+	if (sdata->u.ibss.fixed_bssid)
+		goto put_bss;
+
+	/* not an IBSS */
+	if (!(cbss->capability & WLAN_CAPABILITY_IBSS))
+		goto put_bss;
+
+	/* different channel */
+	if (sdata->u.ibss.fixed_channel &&
+	    sdata->u.ibss.channel != cbss->channel)
+		goto put_bss;
+
+	/* different SSID */
+	if (elems->ssid_len != sdata->u.ibss.ssid_len ||
+	    memcmp(elems->ssid, sdata->u.ibss.ssid,
+				sdata->u.ibss.ssid_len))
+		goto put_bss;
+
+	/* same BSSID */
+	if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid))
+		goto put_bss;
+
+	if (ieee80211_have_rx_timestamp(rx_status)) {
+		/* time when timestamp field was received */
+		rx_timestamp =
+			ieee80211_calculate_rx_timestamp(local, rx_status,
+							 len + FCS_LEN, 24);
+	} else {
+		/*
+		 * second best option: get current TSF
+		 * (will return -1 if not supported)
+		 */
+		rx_timestamp = drv_get_tsf(local, sdata);
+	}
+
+	ibss_dbg(sdata,
+		 "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
+		 mgmt->sa, mgmt->bssid,
+		 (unsigned long long)rx_timestamp,
+		 (unsigned long long)beacon_timestamp,
+		 (unsigned long long)(rx_timestamp - beacon_timestamp),
+		 jiffies);
+
+	if (beacon_timestamp > rx_timestamp) {
+		ibss_dbg(sdata,
+			 "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n",
+			 mgmt->bssid);
+		ieee80211_sta_join_ibss(sdata, bss);
+		supp_rates = ieee80211_sta_get_rates(local, elems, band, NULL);
+		ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa,
+				       supp_rates, true);
+		rcu_read_unlock();
+	}
+
+ put_bss:
+	ieee80211_rx_bss_put(local, bss);
+}
+
+void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
+			      const u8 *bssid, const u8 *addr,
+			      u32 supp_rates)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	int band;
+
+	/*
+	 * XXX: Consider removing the least recently used entry and
+	 * 	allow new one to be added.
+	 */
+	if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
+		net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
+				    sdata->name, addr);
+		return;
+	}
+
+	if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH)
+		return;
+
+	if (!ether_addr_equal(bssid, sdata->u.ibss.bssid))
+		return;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON_ONCE(!chanctx_conf)) {
+		rcu_read_unlock();
+		return;
+	}
+	band = chanctx_conf->def.chan->band;
+	rcu_read_unlock();
+
+	sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
+	if (!sta)
+		return;
+
+	sta->last_rx = jiffies;
+
+	/* make sure mandatory rates are always added */
+	sta->sta.supp_rates[band] = supp_rates |
+			ieee80211_mandatory_rates(local, band);
+
+	spin_lock(&ifibss->incomplete_lock);
+	list_add(&sta->list, &ifibss->incomplete_stations);
+	spin_unlock(&ifibss->incomplete_lock);
+	ieee80211_queue_work(&local->hw, &sdata->work);
+}
+
+static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	int active = 0;
+	struct sta_info *sta;
+
+	lockdep_assert_held(&sdata->u.ibss.mtx);
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		if (sta->sdata == sdata &&
+		    time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
+			       jiffies)) {
+			active++;
+			break;
+		}
+	}
+
+	rcu_read_unlock();
+
+	return active;
+}
+
+/*
+ * This function is called with state == IEEE80211_IBSS_MLME_JOINED
+ */
+
+static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+
+	lockdep_assert_held(&ifibss->mtx);
+
+	mod_timer(&ifibss->timer,
+		  round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
+
+	ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
+
+	if (time_before(jiffies, ifibss->last_scan_completed +
+		       IEEE80211_IBSS_MERGE_INTERVAL))
+		return;
+
+	if (ieee80211_sta_active_ibss(sdata))
+		return;
+
+	if (ifibss->fixed_channel)
+		return;
+
+	sdata_info(sdata,
+		   "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n");
+
+	ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len,
+				    NULL);
+}
+
+static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	u8 bssid[ETH_ALEN];
+	u16 capability;
+	int i;
+
+	lockdep_assert_held(&ifibss->mtx);
+
+	if (ifibss->fixed_bssid) {
+		memcpy(bssid, ifibss->bssid, ETH_ALEN);
+	} else {
+		/* Generate random, not broadcast, locally administered BSSID. Mix in
+		 * own MAC address to make sure that devices that do not have proper
+		 * random number generator get different BSSID. */
+		get_random_bytes(bssid, ETH_ALEN);
+		for (i = 0; i < ETH_ALEN; i++)
+			bssid[i] ^= sdata->vif.addr[i];
+		bssid[0] &= ~0x01;
+		bssid[0] |= 0x02;
+	}
+
+	sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid);
+
+	capability = WLAN_CAPABILITY_IBSS;
+
+	if (ifibss->privacy)
+		capability |= WLAN_CAPABILITY_PRIVACY;
+	else
+		sdata->drop_unencrypted = 0;
+
+	__ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
+				  ifibss->channel, ifibss->basic_rates,
+				  capability, 0, true);
+}
+
+/*
+ * This function is called with state == IEEE80211_IBSS_MLME_SEARCH
+ */
+
+static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+	struct cfg80211_bss *cbss;
+	struct ieee80211_channel *chan = NULL;
+	const u8 *bssid = NULL;
+	int active_ibss;
+	u16 capability;
+
+	lockdep_assert_held(&ifibss->mtx);
+
+	active_ibss = ieee80211_sta_active_ibss(sdata);
+	ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss);
+
+	if (active_ibss)
+		return;
+
+	capability = WLAN_CAPABILITY_IBSS;
+	if (ifibss->privacy)
+		capability |= WLAN_CAPABILITY_PRIVACY;
+	if (ifibss->fixed_bssid)
+		bssid = ifibss->bssid;
+	if (ifibss->fixed_channel)
+		chan = ifibss->channel;
+	if (!is_zero_ether_addr(ifibss->bssid))
+		bssid = ifibss->bssid;
+	cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid,
+				ifibss->ssid, ifibss->ssid_len,
+				WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY,
+				capability);
+
+	if (cbss) {
+		struct ieee80211_bss *bss;
+
+		bss = (void *)cbss->priv;
+		ibss_dbg(sdata,
+			 "sta_find_ibss: selected %pM current %pM\n",
+			 cbss->bssid, ifibss->bssid);
+		sdata_info(sdata,
+			   "Selected IBSS BSSID %pM based on configured SSID\n",
+			   cbss->bssid);
+
+		ieee80211_sta_join_ibss(sdata, bss);
+		ieee80211_rx_bss_put(local, bss);
+		return;
+	}
+
+	ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n");
+
+	/* Selected IBSS not found in current scan results - try to scan */
+	if (time_after(jiffies, ifibss->last_scan_completed +
+					IEEE80211_SCAN_INTERVAL)) {
+		sdata_info(sdata, "Trigger new scan to find an IBSS to join\n");
+
+		ieee80211_request_ibss_scan(sdata, ifibss->ssid,
+					    ifibss->ssid_len, chan);
+	} else {
+		int interval = IEEE80211_SCAN_INTERVAL;
+
+		if (time_after(jiffies, ifibss->ibss_join_req +
+			       IEEE80211_IBSS_JOIN_TIMEOUT))
+			ieee80211_sta_create_ibss(sdata);
+
+		mod_timer(&ifibss->timer,
+			  round_jiffies(jiffies + interval));
+	}
+}
+
+static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
+					struct sk_buff *req)
+{
+	struct ieee80211_mgmt *mgmt = (void *)req->data;
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+	int tx_last_beacon, len = req->len;
+	struct sk_buff *skb;
+	struct beacon_data *presp;
+	u8 *pos, *end;
+
+	lockdep_assert_held(&ifibss->mtx);
+
+	presp = rcu_dereference_protected(ifibss->presp,
+					  lockdep_is_held(&ifibss->mtx));
+
+	if (ifibss->state != IEEE80211_IBSS_MLME_JOINED ||
+	    len < 24 + 2 || !presp)
+		return;
+
+	tx_last_beacon = drv_tx_last_beacon(local);
+
+	ibss_dbg(sdata,
+		 "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n",
+		 mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon);
+
+	if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da))
+		return;
+
+	if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) &&
+	    !is_broadcast_ether_addr(mgmt->bssid))
+		return;
+
+	end = ((u8 *) mgmt) + len;
+	pos = mgmt->u.probe_req.variable;
+	if (pos[0] != WLAN_EID_SSID ||
+	    pos + 2 + pos[1] > end) {
+		ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n",
+			 mgmt->sa);
+		return;
+	}
+	if (pos[1] != 0 &&
+	    (pos[1] != ifibss->ssid_len ||
+	     memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) {
+		/* Ignore ProbeReq for foreign SSID */
+		return;
+	}
+
+	/* Reply with ProbeResp */
+	skb = dev_alloc_skb(local->tx_headroom + presp->head_len);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->tx_headroom);
+	memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len);
+
+	memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN);
+	ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa);
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+static
+void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_mgmt *mgmt, size_t len,
+				    struct ieee80211_rx_status *rx_status)
+{
+	size_t baselen;
+	struct ieee802_11_elems elems;
+
+	BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) !=
+		     offsetof(typeof(mgmt->u.beacon), variable));
+
+	/*
+	 * either beacon or probe_resp but the variable field is at the
+	 * same offset
+	 */
+	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
+	if (baselen > len)
+		return;
+
+	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
+			       false, &elems);
+
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
+}
+
+void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				   struct sk_buff *skb)
+{
+	struct ieee80211_rx_status *rx_status;
+	struct ieee80211_mgmt *mgmt;
+	u16 fc;
+
+	rx_status = IEEE80211_SKB_RXCB(skb);
+	mgmt = (struct ieee80211_mgmt *) skb->data;
+	fc = le16_to_cpu(mgmt->frame_control);
+
+	mutex_lock(&sdata->u.ibss.mtx);
+
+	if (!sdata->u.ibss.ssid_len)
+		goto mgmt_out; /* not ready to merge yet */
+
+	switch (fc & IEEE80211_FCTL_STYPE) {
+	case IEEE80211_STYPE_PROBE_REQ:
+		ieee80211_rx_mgmt_probe_req(sdata, skb);
+		break;
+	case IEEE80211_STYPE_PROBE_RESP:
+	case IEEE80211_STYPE_BEACON:
+		ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len,
+					       rx_status);
+		break;
+	case IEEE80211_STYPE_AUTH:
+		ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_DEAUTH:
+		ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len);
+		break;
+	}
+
+ mgmt_out:
+	mutex_unlock(&sdata->u.ibss.mtx);
+}
+
+void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct sta_info *sta;
+
+	mutex_lock(&ifibss->mtx);
+
+	/*
+	 * Work could be scheduled after scan or similar
+	 * when we aren't even joined (or trying) with a
+	 * network.
+	 */
+	if (!ifibss->ssid_len)
+		goto out;
+
+	spin_lock_bh(&ifibss->incomplete_lock);
+	while (!list_empty(&ifibss->incomplete_stations)) {
+		sta = list_first_entry(&ifibss->incomplete_stations,
+				       struct sta_info, list);
+		list_del(&sta->list);
+		spin_unlock_bh(&ifibss->incomplete_lock);
+
+		ieee80211_ibss_finish_sta(sta, true);
+		rcu_read_unlock();
+		spin_lock_bh(&ifibss->incomplete_lock);
+	}
+	spin_unlock_bh(&ifibss->incomplete_lock);
+
+	switch (ifibss->state) {
+	case IEEE80211_IBSS_MLME_SEARCH:
+		ieee80211_sta_find_ibss(sdata);
+		break;
+	case IEEE80211_IBSS_MLME_JOINED:
+		ieee80211_sta_merge_ibss(sdata);
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+
+ out:
+	mutex_unlock(&ifibss->mtx);
+}
+
+static void ieee80211_ibss_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+}
+
+void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+
+	setup_timer(&ifibss->timer, ieee80211_ibss_timer,
+		    (unsigned long) sdata);
+	mutex_init(&ifibss->mtx);
+	INIT_LIST_HEAD(&ifibss->incomplete_stations);
+	spin_lock_init(&ifibss->incomplete_lock);
+}
+
+/* scan finished notification */
+void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+		if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
+			continue;
+		sdata->u.ibss.last_scan_completed = jiffies;
+		ieee80211_queue_work(&local->hw, &sdata->work);
+	}
+	mutex_unlock(&local->iflist_mtx);
+}
+
+int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
+			struct cfg80211_ibss_params *params)
+{
+	u32 changed = 0;
+
+	mutex_lock(&sdata->u.ibss.mtx);
+
+	if (params->bssid) {
+		memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN);
+		sdata->u.ibss.fixed_bssid = true;
+	} else
+		sdata->u.ibss.fixed_bssid = false;
+
+	sdata->u.ibss.privacy = params->privacy;
+	sdata->u.ibss.control_port = params->control_port;
+	sdata->u.ibss.basic_rates = params->basic_rates;
+	memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate,
+	       sizeof(params->mcast_rate));
+
+	sdata->vif.bss_conf.beacon_int = params->beacon_interval;
+
+	sdata->u.ibss.channel = params->chandef.chan;
+	sdata->u.ibss.channel_type =
+		cfg80211_get_chandef_type(&params->chandef);
+	sdata->u.ibss.fixed_channel = params->channel_fixed;
+
+	if (params->ie) {
+		sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len,
+					   GFP_KERNEL);
+		if (sdata->u.ibss.ie)
+			sdata->u.ibss.ie_len = params->ie_len;
+	}
+
+	sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
+	sdata->u.ibss.ibss_join_req = jiffies;
+
+	memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len);
+	sdata->u.ibss.ssid_len = params->ssid_len;
+
+	mutex_unlock(&sdata->u.ibss.mtx);
+
+	/*
+	 * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is
+	 * reserved, but an HT STA shall protect HT transmissions as though
+	 * the HT Protection field were set to non-HT mixed mode.
+	 *
+	 * In an IBSS, the RIFS Mode field of the HT Operation element is
+	 * also reserved, but an HT STA shall operate as though this field
+	 * were set to 1.
+	 */
+
+	sdata->vif.bss_conf.ht_operation_mode |=
+		  IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED
+		| IEEE80211_HT_PARAM_RIFS_MODE;
+
+	changed |= BSS_CHANGED_HT;
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	sdata->smps_mode = IEEE80211_SMPS_OFF;
+	sdata->needed_rx_chains = sdata->local->rx_chains;
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+
+	return 0;
+}
+
+int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+	struct cfg80211_bss *cbss;
+	u16 capability;
+	int active_ibss;
+	struct sta_info *sta;
+	struct beacon_data *presp;
+
+	mutex_lock(&sdata->u.ibss.mtx);
+
+	active_ibss = ieee80211_sta_active_ibss(sdata);
+
+	if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) {
+		capability = WLAN_CAPABILITY_IBSS;
+
+		if (ifibss->privacy)
+			capability |= WLAN_CAPABILITY_PRIVACY;
+
+		cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel,
+					ifibss->bssid, ifibss->ssid,
+					ifibss->ssid_len, WLAN_CAPABILITY_IBSS |
+					WLAN_CAPABILITY_PRIVACY,
+					capability);
+
+		if (cbss) {
+			cfg80211_unlink_bss(local->hw.wiphy, cbss);
+			cfg80211_put_bss(local->hw.wiphy, cbss);
+		}
+	}
+
+	ifibss->state = IEEE80211_IBSS_MLME_SEARCH;
+	memset(ifibss->bssid, 0, ETH_ALEN);
+	ifibss->ssid_len = 0;
+
+	sta_info_flush(sdata);
+
+	spin_lock_bh(&ifibss->incomplete_lock);
+	while (!list_empty(&ifibss->incomplete_stations)) {
+		sta = list_first_entry(&ifibss->incomplete_stations,
+				       struct sta_info, list);
+		list_del(&sta->list);
+		spin_unlock_bh(&ifibss->incomplete_lock);
+
+		sta_info_free(local, sta);
+		spin_lock_bh(&ifibss->incomplete_lock);
+	}
+	spin_unlock_bh(&ifibss->incomplete_lock);
+
+	netif_carrier_off(sdata->dev);
+
+	/* remove beacon */
+	kfree(sdata->u.ibss.ie);
+	presp = rcu_dereference_protected(ifibss->presp,
+					  lockdep_is_held(&sdata->u.ibss.mtx));
+	RCU_INIT_POINTER(sdata->u.ibss.presp, NULL);
+	sdata->vif.bss_conf.ibss_joined = false;
+	sdata->vif.bss_conf.ibss_creator = false;
+	sdata->vif.bss_conf.enable_beacon = false;
+	sdata->vif.bss_conf.ssid_len = 0;
+	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
+						BSS_CHANGED_IBSS);
+	ieee80211_vif_release_channel(sdata);
+	synchronize_rcu();
+	kfree(presp);
+
+	skb_queue_purge(&sdata->skb_queue);
+
+	del_timer_sync(&sdata->u.ibss.timer);
+
+	mutex_unlock(&sdata->u.ibss.mtx);
+
+	return 0;
+}
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
new file mode 100644
index 0000000..da014d0
--- /dev/null
+++ b/net/mac80211/ieee80211_i.h
@@ -0,0 +1,1641 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007-2010	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef IEEE80211_I_H
+#define IEEE80211_I_H
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/if_ether.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/workqueue.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/etherdevice.h>
+#include <linux/leds.h>
+#include <linux/idr.h>
+#include <net/ieee80211_radiotap.h>
+#include <net/cfg80211.h>
+#include <net/mac80211.h>
+#include "key.h"
+#include "sta_info.h"
+#include "debug.h"
+
+struct ieee80211_local;
+
+/* Maximum number of broadcast/multicast frames to buffer when some of the
+ * associated stations are using power saving. */
+#define AP_MAX_BC_BUFFER 128
+
+/* Maximum number of frames buffered to all STAs, including multicast frames.
+ * Note: increasing this limit increases the potential memory requirement. Each
+ * frame can be up to about 2 kB long. */
+#define TOTAL_MAX_TX_BUFFER 512
+
+/* Required encryption head and tailroom */
+#define IEEE80211_ENCRYPT_HEADROOM 8
+#define IEEE80211_ENCRYPT_TAILROOM 18
+
+/* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
+ * reception of at least three fragmented frames. This limit can be increased
+ * by changing this define, at the cost of slower frame reassembly and
+ * increased memory use (about 2 kB of RAM per entry). */
+#define IEEE80211_FRAGMENT_MAX 4
+
+#define TU_TO_JIFFIES(x)	(usecs_to_jiffies((x) * 1024))
+#define TU_TO_EXP_TIME(x)	(jiffies + TU_TO_JIFFIES(x))
+
+/* power level hasn't been configured (or set to automatic) */
+#define IEEE80211_UNSET_POWER_LEVEL	INT_MIN
+
+/*
+ * Some APs experience problems when working with U-APSD. Decrease the
+ * probability of that happening by using legacy mode for all ACs but VO.
+ * The AP that caused us trouble was a Cisco 4410N. It ignores our
+ * setting, and always treats non-VO ACs as legacy.
+ */
+#define IEEE80211_DEFAULT_UAPSD_QUEUES \
+	IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
+
+#define IEEE80211_DEFAULT_MAX_SP_LEN		\
+	IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
+
+#define IEEE80211_DEAUTH_FRAME_LEN	(24 /* hdr */ + 2 /* reason */)
+
+struct ieee80211_fragment_entry {
+	unsigned long first_frag_time;
+	unsigned int seq;
+	unsigned int rx_queue;
+	unsigned int last_frag;
+	unsigned int extra_len;
+	struct sk_buff_head skb_list;
+	int ccmp; /* Whether fragments were encrypted with CCMP */
+	u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
+};
+
+
+struct ieee80211_bss {
+	u32 device_ts_beacon, device_ts_presp;
+
+	bool wmm_used;
+	bool uapsd_supported;
+
+#define IEEE80211_MAX_SUPP_RATES 32
+	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
+	size_t supp_rates_len;
+
+	/*
+	 * During association, we save an ERP value from a probe response so
+	 * that we can feed ERP info to the driver when handling the
+	 * association completes. these fields probably won't be up-to-date
+	 * otherwise, you probably don't want to use them.
+	 */
+	bool has_erp_value;
+	u8 erp_value;
+
+	/* Keep track of the corruption of the last beacon/probe response. */
+	u8 corrupt_data;
+
+	/* Keep track of what bits of information we have valid info for. */
+	u8 valid_data;
+};
+
+/**
+ * enum ieee80211_corrupt_data_flags - BSS data corruption flags
+ * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
+ * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
+ *
+ * These are bss flags that are attached to a bss in the
+ * @corrupt_data field of &struct ieee80211_bss.
+ */
+enum ieee80211_bss_corrupt_data_flags {
+	IEEE80211_BSS_CORRUPT_BEACON		= BIT(0),
+	IEEE80211_BSS_CORRUPT_PROBE_RESP	= BIT(1)
+};
+
+/**
+ * enum ieee80211_valid_data_flags - BSS valid data flags
+ * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
+ * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
+ * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
+ *
+ * These are bss flags that are attached to a bss in the
+ * @valid_data field of &struct ieee80211_bss.  They show which parts
+ * of the data structure were recieved as a result of an un-corrupted
+ * beacon/probe response.
+ */
+enum ieee80211_bss_valid_data_flags {
+	IEEE80211_BSS_VALID_WMM			= BIT(1),
+	IEEE80211_BSS_VALID_RATES		= BIT(2),
+	IEEE80211_BSS_VALID_ERP			= BIT(3)
+};
+
+typedef unsigned __bitwise__ ieee80211_tx_result;
+#define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
+#define TX_DROP		((__force ieee80211_tx_result) 1u)
+#define TX_QUEUED	((__force ieee80211_tx_result) 2u)
+
+#define IEEE80211_TX_UNICAST		BIT(1)
+#define IEEE80211_TX_PS_BUFFERED	BIT(2)
+
+struct ieee80211_tx_data {
+	struct sk_buff *skb;
+	struct sk_buff_head skbs;
+	struct ieee80211_local *local;
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+	struct ieee80211_key *key;
+	struct ieee80211_tx_rate rate;
+
+	unsigned int flags;
+};
+
+
+typedef unsigned __bitwise__ ieee80211_rx_result;
+#define RX_CONTINUE		((__force ieee80211_rx_result) 0u)
+#define RX_DROP_UNUSABLE	((__force ieee80211_rx_result) 1u)
+#define RX_DROP_MONITOR		((__force ieee80211_rx_result) 2u)
+#define RX_QUEUED		((__force ieee80211_rx_result) 3u)
+
+/**
+ * enum ieee80211_packet_rx_flags - packet RX flags
+ * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
+ *	(incl. multicast frames)
+ * @IEEE80211_RX_FRAGMENTED: fragmented frame
+ * @IEEE80211_RX_AMSDU: a-MSDU packet
+ * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
+ * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
+ *
+ * These are per-frame flags that are attached to a frame in the
+ * @rx_flags field of &struct ieee80211_rx_status.
+ */
+enum ieee80211_packet_rx_flags {
+	IEEE80211_RX_RA_MATCH			= BIT(1),
+	IEEE80211_RX_FRAGMENTED			= BIT(2),
+	IEEE80211_RX_AMSDU			= BIT(3),
+	IEEE80211_RX_MALFORMED_ACTION_FRM	= BIT(4),
+	IEEE80211_RX_DEFERRED_RELEASE		= BIT(5),
+};
+
+/**
+ * enum ieee80211_rx_flags - RX data flags
+ *
+ * @IEEE80211_RX_CMNTR: received on cooked monitor already
+ * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
+ *	to cfg80211_report_obss_beacon().
+ *
+ * These flags are used across handling multiple interfaces
+ * for a single frame.
+ */
+enum ieee80211_rx_flags {
+	IEEE80211_RX_CMNTR		= BIT(0),
+	IEEE80211_RX_BEACON_REPORTED	= BIT(1),
+};
+
+struct ieee80211_rx_data {
+	struct sk_buff *skb;
+	struct ieee80211_local *local;
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+	struct ieee80211_key *key;
+
+	unsigned int flags;
+
+	/*
+	 * Index into sequence numbers array, 0..16
+	 * since the last (16) is used for non-QoS,
+	 * will be 16 on non-QoS frames.
+	 */
+	int seqno_idx;
+
+	/*
+	 * Index into the security IV/PN arrays, 0..16
+	 * since the last (16) is used for CCMP-encrypted
+	 * management frames, will be set to 16 on mgmt
+	 * frames and 0 on non-QoS frames.
+	 */
+	int security_idx;
+
+	u32 tkip_iv32;
+	u16 tkip_iv16;
+};
+
+struct beacon_data {
+	u8 *head, *tail;
+	int head_len, tail_len;
+	struct rcu_head rcu_head;
+};
+
+struct probe_resp {
+	struct rcu_head rcu_head;
+	int len;
+	u8 data[0];
+};
+
+struct ps_data {
+	/* yes, this looks ugly, but guarantees that we can later use
+	 * bitmap_empty :)
+	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
+	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
+	struct sk_buff_head bc_buf;
+	atomic_t num_sta_ps; /* number of stations in PS mode */
+	int dtim_count;
+	bool dtim_bc_mc;
+};
+
+struct ieee80211_if_ap {
+	struct beacon_data __rcu *beacon;
+	struct probe_resp __rcu *probe_resp;
+
+	struct list_head vlans;
+
+	struct ps_data ps;
+	atomic_t num_mcast_sta; /* number of stations receiving multicast */
+};
+
+struct ieee80211_if_wds {
+	struct sta_info *sta;
+	u8 remote_addr[ETH_ALEN];
+};
+
+struct ieee80211_if_vlan {
+	struct list_head list;
+
+	/* used for all tx if the VLAN is configured to 4-addr mode */
+	struct sta_info __rcu *sta;
+};
+
+struct mesh_stats {
+	__u32 fwded_mcast;		/* Mesh forwarded multicast frames */
+	__u32 fwded_unicast;		/* Mesh forwarded unicast frames */
+	__u32 fwded_frames;		/* Mesh total forwarded frames */
+	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
+	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
+	__u32 dropped_frames_congestion;/* Not forwarded due to congestion */
+};
+
+#define PREQ_Q_F_START		0x1
+#define PREQ_Q_F_REFRESH	0x2
+struct mesh_preq_queue {
+	struct list_head list;
+	u8 dst[ETH_ALEN];
+	u8 flags;
+};
+
+#if HZ/100 == 0
+#define IEEE80211_ROC_MIN_LEFT	1
+#else
+#define IEEE80211_ROC_MIN_LEFT	(HZ/100)
+#endif
+
+struct ieee80211_roc_work {
+	struct list_head list;
+	struct list_head dependents;
+
+	struct delayed_work work;
+
+	struct ieee80211_sub_if_data *sdata;
+
+	struct ieee80211_channel *chan;
+
+	bool started, abort, hw_begun, notified;
+	bool to_be_freed;
+
+	unsigned long hw_start_time;
+
+	u32 duration, req_duration;
+	struct sk_buff *frame;
+	u64 cookie, mgmt_tx_cookie;
+	enum ieee80211_roc_type type;
+};
+
+/* flags used in struct ieee80211_if_managed.flags */
+enum ieee80211_sta_flags {
+	IEEE80211_STA_BEACON_POLL	= BIT(0),
+	IEEE80211_STA_CONNECTION_POLL	= BIT(1),
+	IEEE80211_STA_CONTROL_PORT	= BIT(2),
+	IEEE80211_STA_DISABLE_HT	= BIT(4),
+	IEEE80211_STA_CSA_RECEIVED	= BIT(5),
+	IEEE80211_STA_MFP_ENABLED	= BIT(6),
+	IEEE80211_STA_UAPSD_ENABLED	= BIT(7),
+	IEEE80211_STA_NULLFUNC_ACKED	= BIT(8),
+	IEEE80211_STA_RESET_SIGNAL_AVE	= BIT(9),
+	IEEE80211_STA_DISABLE_40MHZ	= BIT(10),
+	IEEE80211_STA_DISABLE_VHT	= BIT(11),
+	IEEE80211_STA_DISABLE_80P80MHZ	= BIT(12),
+	IEEE80211_STA_DISABLE_160MHZ	= BIT(13),
+};
+
+struct ieee80211_mgd_auth_data {
+	struct cfg80211_bss *bss;
+	unsigned long timeout;
+	int tries;
+	u16 algorithm, expected_transaction;
+
+	u8 key[WLAN_KEY_LEN_WEP104];
+	u8 key_len, key_idx;
+	bool done;
+	bool timeout_started;
+
+	u16 sae_trans, sae_status;
+	size_t data_len;
+	u8 data[];
+};
+
+struct ieee80211_mgd_assoc_data {
+	struct cfg80211_bss *bss;
+	const u8 *supp_rates;
+
+	unsigned long timeout;
+	int tries;
+
+	u16 capability;
+	u8 prev_bssid[ETH_ALEN];
+	u8 ssid[IEEE80211_MAX_SSID_LEN];
+	u8 ssid_len;
+	u8 supp_rates_len;
+	bool wmm, uapsd;
+	bool have_beacon, need_beacon;
+	bool synced;
+	bool timeout_started;
+
+	u8 ap_ht_param;
+
+	struct ieee80211_vht_cap ap_vht_cap;
+
+	size_t ie_len;
+	u8 ie[];
+};
+
+struct ieee80211_if_managed {
+	struct timer_list timer;
+	struct timer_list conn_mon_timer;
+	struct timer_list bcn_mon_timer;
+	struct timer_list chswitch_timer;
+	struct work_struct monitor_work;
+	struct work_struct chswitch_work;
+	struct work_struct beacon_connection_loss_work;
+	struct work_struct csa_connection_drop_work;
+
+	unsigned long beacon_timeout;
+	unsigned long probe_timeout;
+	int probe_send_count;
+	bool nullfunc_failed;
+	bool connection_loss;
+
+	struct mutex mtx;
+	struct cfg80211_bss *associated;
+	struct ieee80211_mgd_auth_data *auth_data;
+	struct ieee80211_mgd_assoc_data *assoc_data;
+
+	u8 bssid[ETH_ALEN];
+
+	u16 aid;
+
+	bool powersave; /* powersave requested for this iface */
+	bool broken_ap; /* AP is broken -- turn off powersave */
+	u8 dtim_period;
+	enum ieee80211_smps_mode req_smps, /* requested smps mode */
+				 driver_smps_mode; /* smps mode request */
+
+	struct work_struct request_smps_work;
+
+	unsigned int flags;
+
+	bool beacon_crc_valid;
+	u32 beacon_crc;
+
+	bool status_acked;
+	bool status_received;
+	__le16 status_fc;
+
+	enum {
+		IEEE80211_MFP_DISABLED,
+		IEEE80211_MFP_OPTIONAL,
+		IEEE80211_MFP_REQUIRED
+	} mfp; /* management frame protection */
+
+	/*
+	 * Bitmask of enabled u-apsd queues,
+	 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
+	 * to take effect.
+	 */
+	unsigned int uapsd_queues;
+
+	/*
+	 * Maximum number of buffered frames AP can deliver during a
+	 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
+	 * Needs a new association to take effect.
+	 */
+	unsigned int uapsd_max_sp_len;
+
+	int wmm_last_param_set;
+
+	u8 use_4addr;
+
+	s16 p2p_noa_index;
+
+	/* Signal strength from the last Beacon frame in the current BSS. */
+	int last_beacon_signal;
+
+	/*
+	 * Weighted average of the signal strength from Beacon frames in the
+	 * current BSS. This is in units of 1/16 of the signal unit to maintain
+	 * accuracy and to speed up calculations, i.e., the value need to be
+	 * divided by 16 to get the actual value.
+	 */
+	int ave_beacon_signal;
+
+	/*
+	 * Number of Beacon frames used in ave_beacon_signal. This can be used
+	 * to avoid generating less reliable cqm events that would be based
+	 * only on couple of received frames.
+	 */
+	unsigned int count_beacon_signal;
+
+	/*
+	 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
+	 * that triggered a cqm event. 0 indicates that no event has been
+	 * generated for the current association.
+	 */
+	int last_cqm_event_signal;
+
+	/*
+	 * State variables for keeping track of RSSI of the AP currently
+	 * connected to and informing driver when RSSI has gone
+	 * below/above a certain threshold.
+	 */
+	int rssi_min_thold, rssi_max_thold;
+	int last_ave_beacon_signal;
+
+	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
+	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
+	struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
+	struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
+};
+
+struct ieee80211_if_ibss {
+	struct timer_list timer;
+
+	struct mutex mtx;
+
+	unsigned long last_scan_completed;
+
+	u32 basic_rates;
+
+	bool fixed_bssid;
+	bool fixed_channel;
+	bool privacy;
+
+	bool control_port;
+	unsigned int auth_frame_registrations;
+
+	u8 bssid[ETH_ALEN] __aligned(2);
+	u8 ssid[IEEE80211_MAX_SSID_LEN];
+	u8 ssid_len, ie_len;
+	u8 *ie;
+	struct ieee80211_channel *channel;
+	enum nl80211_channel_type channel_type;
+
+	unsigned long ibss_join_req;
+	/* probe response/beacon for IBSS */
+	struct beacon_data __rcu *presp;
+
+	spinlock_t incomplete_lock;
+	struct list_head incomplete_stations;
+
+	enum {
+		IEEE80211_IBSS_MLME_SEARCH,
+		IEEE80211_IBSS_MLME_JOINED,
+	} state;
+};
+
+/**
+ * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
+ *
+ * these declarations define the interface, which enables
+ * vendor-specific mesh synchronization
+ *
+ */
+struct ieee802_11_elems;
+struct ieee80211_mesh_sync_ops {
+	void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
+			     u16 stype,
+			     struct ieee80211_mgmt *mgmt,
+			     struct ieee802_11_elems *elems,
+			     struct ieee80211_rx_status *rx_status);
+	void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata);
+	/* add other framework functions here */
+};
+
+struct ieee80211_if_mesh {
+	struct timer_list housekeeping_timer;
+	struct timer_list mesh_path_timer;
+	struct timer_list mesh_path_root_timer;
+
+	unsigned long wrkq_flags;
+
+	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
+	size_t mesh_id_len;
+	/* Active Path Selection Protocol Identifier */
+	u8 mesh_pp_id;
+	/* Active Path Selection Metric Identifier */
+	u8 mesh_pm_id;
+	/* Congestion Control Mode Identifier */
+	u8 mesh_cc_id;
+	/* Synchronization Protocol Identifier */
+	u8 mesh_sp_id;
+	/* Authentication Protocol Identifier */
+	u8 mesh_auth_id;
+	/* Local mesh Sequence Number */
+	u32 sn;
+	/* Last used PREQ ID */
+	u32 preq_id;
+	atomic_t mpaths;
+	/* Timestamp of last SN update */
+	unsigned long last_sn_update;
+	/* Time when it's ok to send next PERR */
+	unsigned long next_perr;
+	/* Timestamp of last PREQ sent */
+	unsigned long last_preq;
+	struct mesh_rmc *rmc;
+	spinlock_t mesh_preq_queue_lock;
+	struct mesh_preq_queue preq_queue;
+	int preq_queue_len;
+	struct mesh_stats mshstats;
+	struct mesh_config mshcfg;
+	atomic_t estab_plinks;
+	u32 mesh_seqnum;
+	bool accepting_plinks;
+	int num_gates;
+	struct beacon_data __rcu *beacon;
+	/* just protects beacon updates for now */
+	struct mutex mtx;
+	const u8 *ie;
+	u8 ie_len;
+	enum {
+		IEEE80211_MESH_SEC_NONE = 0x0,
+		IEEE80211_MESH_SEC_AUTHED = 0x1,
+		IEEE80211_MESH_SEC_SECURED = 0x2,
+	} security;
+	bool user_mpm;
+	/* Extensible Synchronization Framework */
+	const struct ieee80211_mesh_sync_ops *sync_ops;
+	s64 sync_offset_clockdrift_max;
+	spinlock_t sync_offset_lock;
+	bool adjusting_tbtt;
+	/* mesh power save */
+	enum nl80211_mesh_power_mode nonpeer_pm;
+	int ps_peers_light_sleep;
+	int ps_peers_deep_sleep;
+	struct ps_data ps;
+};
+
+#ifdef CPTCFG_MAC80211_MESH
+#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
+	do { (msh)->mshstats.name++; } while (0)
+#else
+#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
+	do { } while (0)
+#endif
+
+/**
+ * enum ieee80211_sub_if_data_flags - virtual interface flags
+ *
+ * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
+ * @IEEE80211_SDATA_PROMISC: interface is promisc
+ * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
+ * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
+ *	associated stations and deliver multicast frames both
+ *	back to wireless media and to the local net stack.
+ * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
+ * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
+ */
+enum ieee80211_sub_if_data_flags {
+	IEEE80211_SDATA_ALLMULTI		= BIT(0),
+	IEEE80211_SDATA_PROMISC			= BIT(1),
+	IEEE80211_SDATA_OPERATING_GMODE		= BIT(2),
+	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
+	IEEE80211_SDATA_DISCONNECT_RESUME	= BIT(4),
+	IEEE80211_SDATA_IN_DRIVER		= BIT(5),
+};
+
+/**
+ * enum ieee80211_sdata_state_bits - virtual interface state bits
+ * @SDATA_STATE_RUNNING: virtual interface is up & running; this
+ *	mirrors netif_running() but is separate for interface type
+ *	change handling while the interface is up
+ * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
+ *	mode, so queues are stopped
+ * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
+ *	to offchannel, reset when offchannel returns
+ */
+enum ieee80211_sdata_state_bits {
+	SDATA_STATE_RUNNING,
+	SDATA_STATE_OFFCHANNEL,
+	SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
+};
+
+/**
+ * enum ieee80211_chanctx_mode - channel context configuration mode
+ *
+ * @IEEE80211_CHANCTX_SHARED: channel context may be used by
+ *	multiple interfaces
+ * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
+ *	only by a single interface. This can be used for example for
+ *	non-fixed channel IBSS.
+ */
+enum ieee80211_chanctx_mode {
+	IEEE80211_CHANCTX_SHARED,
+	IEEE80211_CHANCTX_EXCLUSIVE
+};
+
+struct ieee80211_chanctx {
+	struct list_head list;
+	struct rcu_head rcu_head;
+
+	enum ieee80211_chanctx_mode mode;
+	int refcount;
+	bool driver_present;
+
+	struct ieee80211_chanctx_conf conf;
+};
+
+struct ieee80211_sub_if_data {
+	struct list_head list;
+
+	struct wireless_dev wdev;
+
+	/* keys */
+	struct list_head key_list;
+
+	/* count for keys needing tailroom space allocation */
+	int crypto_tx_tailroom_needed_cnt;
+	int crypto_tx_tailroom_pending_dec;
+	struct delayed_work dec_tailroom_needed_wk;
+
+	struct net_device *dev;
+	struct ieee80211_local *local;
+
+	unsigned int flags;
+
+	unsigned long state;
+
+	int drop_unencrypted;
+
+	char name[IFNAMSIZ];
+
+	/* Fragment table for host-based reassembly */
+	struct ieee80211_fragment_entry	fragments[IEEE80211_FRAGMENT_MAX];
+	unsigned int fragment_next;
+
+	/* TID bitmap for NoAck policy */
+	u16 noack_map;
+
+	/* bit field of ACM bits (BIT(802.1D tag)) */
+	u8 wmm_acm;
+
+	struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
+	struct ieee80211_key __rcu *default_unicast_key;
+	struct ieee80211_key __rcu *default_multicast_key;
+	struct ieee80211_key __rcu *default_mgmt_key;
+
+	u16 sequence_number;
+	__be16 control_port_protocol;
+	bool control_port_no_encrypt;
+
+	struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
+
+	/* used to reconfigure hardware SM PS */
+	struct work_struct recalc_smps;
+
+	struct work_struct work;
+	struct sk_buff_head skb_queue;
+
+	u8 needed_rx_chains;
+	enum ieee80211_smps_mode smps_mode;
+
+	int user_power_level; /* in dBm */
+	int ap_power_level; /* in dBm */
+
+	bool radar_required;
+	struct delayed_work dfs_cac_timer_work;
+
+	/*
+	 * AP this belongs to: self in AP mode and
+	 * corresponding AP in VLAN mode, NULL for
+	 * all others (might be needed later in IBSS)
+	 */
+	struct ieee80211_if_ap *bss;
+
+	/* bitmap of allowed (non-MCS) rate indexes for rate control */
+	u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
+
+	bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
+	u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
+
+	union {
+		struct ieee80211_if_ap ap;
+		struct ieee80211_if_wds wds;
+		struct ieee80211_if_vlan vlan;
+		struct ieee80211_if_managed mgd;
+		struct ieee80211_if_ibss ibss;
+		struct ieee80211_if_mesh mesh;
+		u32 mntr_flags;
+	} u;
+
+	spinlock_t cleanup_stations_lock;
+	struct list_head cleanup_stations;
+	struct work_struct cleanup_stations_wk;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct {
+		struct dentry *subdir_stations;
+		struct dentry *default_unicast_key;
+		struct dentry *default_multicast_key;
+		struct dentry *default_mgmt_key;
+	} debugfs;
+#endif
+
+	/* must be last, dynamically sized area in this! */
+	struct ieee80211_vif vif;
+};
+
+static inline
+struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
+{
+	return container_of(p, struct ieee80211_sub_if_data, vif);
+}
+
+static inline enum ieee80211_band
+ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
+{
+	enum ieee80211_band band = IEEE80211_BAND_2GHZ;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!WARN_ON(!chanctx_conf))
+		band = chanctx_conf->def.chan->band;
+	rcu_read_unlock();
+
+	return band;
+}
+
+enum sdata_queue_type {
+	IEEE80211_SDATA_QUEUE_TYPE_FRAME	= 0,
+	IEEE80211_SDATA_QUEUE_AGG_START		= 1,
+	IEEE80211_SDATA_QUEUE_AGG_STOP		= 2,
+};
+
+enum {
+	IEEE80211_RX_MSG	= 1,
+	IEEE80211_TX_STATUS_MSG	= 2,
+};
+
+enum queue_stop_reason {
+	IEEE80211_QUEUE_STOP_REASON_DRIVER,
+	IEEE80211_QUEUE_STOP_REASON_PS,
+	IEEE80211_QUEUE_STOP_REASON_CSA,
+	IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
+	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
+	IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
+	IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
+	IEEE80211_QUEUE_STOP_REASON_FLUSH,
+};
+
+#ifdef CPTCFG_MAC80211_LEDS
+struct tpt_led_trigger {
+	struct led_trigger trig;
+	char name[32];
+	const struct ieee80211_tpt_blink *blink_table;
+	unsigned int blink_table_len;
+	struct timer_list timer;
+	unsigned long prev_traffic;
+	unsigned long tx_bytes, rx_bytes;
+	unsigned int active, want;
+	bool running;
+};
+#endif
+
+/**
+ * mac80211 scan flags - currently active scan mode
+ *
+ * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
+ *	well be on the operating channel
+ * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
+ *	determine if we are on the operating channel or not
+ * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
+ *	channel. This should not interrupt normal traffic.
+ * @SCAN_COMPLETED: Set for our scan work function when the driver reported
+ *	that the scan completed.
+ * @SCAN_ABORTED: Set for our scan work function when the driver reported
+ *	a scan complete for an aborted scan.
+ * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
+ *	cancelled.
+ */
+enum {
+	SCAN_SW_SCANNING,
+	SCAN_HW_SCANNING,
+	SCAN_ONCHANNEL_SCANNING,
+	SCAN_COMPLETED,
+	SCAN_ABORTED,
+	SCAN_HW_CANCELLED,
+};
+
+/**
+ * enum mac80211_scan_state - scan state machine states
+ *
+ * @SCAN_DECISION: Main entry point to the scan state machine, this state
+ *	determines if we should keep on scanning or switch back to the
+ *	operating channel
+ * @SCAN_SET_CHANNEL: Set the next channel to be scanned
+ * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
+ * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
+ *	send out data
+ * @SCAN_RESUME: Resume the scan and scan the next channel
+ * @SCAN_ABORT: Abort the scan and go back to operating channel
+ */
+enum mac80211_scan_state {
+	SCAN_DECISION,
+	SCAN_SET_CHANNEL,
+	SCAN_SEND_PROBE,
+	SCAN_SUSPEND,
+	SCAN_RESUME,
+	SCAN_ABORT,
+};
+
+struct ieee80211_local {
+	/* embed the driver visible part.
+	 * don't cast (use the static inlines below), but we keep
+	 * it first anyway so they become a no-op */
+	struct ieee80211_hw hw;
+
+	const struct ieee80211_ops *ops;
+
+	/*
+	 * private workqueue to mac80211. mac80211 makes this accessible
+	 * via ieee80211_queue_work()
+	 */
+	struct workqueue_struct *workqueue;
+
+	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
+	/* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
+	spinlock_t queue_stop_reason_lock;
+
+	int open_count;
+	int monitors, cooked_mntrs;
+	/* number of interfaces with corresponding FIF_ flags */
+	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
+	    fif_probe_req;
+	int probe_req_reg;
+	unsigned int filter_flags; /* FIF_* */
+
+	bool wiphy_ciphers_allocated;
+
+	bool use_chanctx;
+
+	/* protects the aggregated multicast list and filter calls */
+	spinlock_t filter_lock;
+
+	/* used for uploading changed mc list */
+	struct work_struct reconfig_filter;
+
+	/* aggregated multicast list */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+	struct netdev_hw_addr_list mc_list;
+#else
+	struct dev_addr_list *mc_list;
+	int mc_count;
+#endif
+
+	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
+
+	/*
+	 * suspended is true if we finished all the suspend _and_ we have
+	 * not yet come up from resume. This is to be used by mac80211
+	 * to ensure driver sanity during suspend and mac80211's own
+	 * sanity. It can eventually be used for WoW as well.
+	 */
+	bool suspended;
+
+	/*
+	 * Resuming is true while suspended, but when we're reprogramming the
+	 * hardware -- at that time it's allowed to use ieee80211_queue_work()
+	 * again even though some other parts of the stack are still suspended
+	 * and we still drop received frames to avoid waking the stack.
+	 */
+	bool resuming;
+
+	/*
+	 * quiescing is true during the suspend process _only_ to
+	 * ease timer cancelling etc.
+	 */
+	bool quiescing;
+
+	/* device is started */
+	bool started;
+
+	/* device is during a HW reconfig */
+	bool in_reconfig;
+
+	/* wowlan is enabled -- don't reconfig on resume */
+	bool wowlan;
+
+	/* DFS/radar detection is enabled */
+	bool radar_detect_enabled;
+	struct work_struct radar_detected_work;
+
+	/* number of RX chains the hardware has */
+	u8 rx_chains;
+
+	int tx_headroom; /* required headroom for hardware/radiotap */
+
+	/* Tasklet and skb queue to process calls from IRQ mode. All frames
+	 * added to skb_queue will be processed, but frames in
+	 * skb_queue_unreliable may be dropped if the total length of these
+	 * queues increases over the limit. */
+#define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
+	struct tasklet_struct tasklet;
+	struct sk_buff_head skb_queue;
+	struct sk_buff_head skb_queue_unreliable;
+
+	spinlock_t rx_path_lock;
+
+	/* Station data */
+	/*
+	 * The mutex only protects the list, hash table and
+	 * counter, reads are done with RCU.
+	 */
+	struct mutex sta_mtx;
+	spinlock_t tim_lock;
+	unsigned long num_sta;
+	struct list_head sta_list;
+	struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
+	struct timer_list sta_cleanup;
+	int sta_generation;
+
+	struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
+	struct tasklet_struct tx_pending_tasklet;
+
+	atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
+
+	/* number of interfaces with corresponding IFF_ flags */
+	atomic_t iff_allmultis, iff_promiscs;
+
+	struct rate_control_ref *rate_ctrl;
+
+	struct crypto_cipher *wep_tx_tfm;
+	struct crypto_cipher *wep_rx_tfm;
+	u32 wep_iv;
+
+	/* see iface.c */
+	struct list_head interfaces;
+	struct mutex iflist_mtx;
+
+	/*
+	 * Key mutex, protects sdata's key_list and sta_info's
+	 * key pointers (write access, they're RCU.)
+	 */
+	struct mutex key_mtx;
+
+	/* mutex for scan and work locking */
+	struct mutex mtx;
+
+	/* Scanning and BSS list */
+	unsigned long scanning;
+	struct cfg80211_ssid scan_ssid;
+	struct cfg80211_scan_request *int_scan_req;
+	struct cfg80211_scan_request *scan_req, *hw_scan_req;
+	struct ieee80211_channel *scan_channel;
+	enum ieee80211_band hw_scan_band;
+	int scan_channel_idx;
+	int scan_ies_len;
+	int hw_scan_ies_bufsize;
+
+	struct work_struct sched_scan_stopped_work;
+	struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
+
+	unsigned long leave_oper_channel_time;
+	enum mac80211_scan_state next_scan_state;
+	struct delayed_work scan_work;
+	struct ieee80211_sub_if_data __rcu *scan_sdata;
+	struct cfg80211_chan_def csa_chandef;
+	/* For backward compatibility only -- do not use */
+	struct cfg80211_chan_def _oper_chandef;
+
+	/* Temporary remain-on-channel for off-channel operations */
+	struct ieee80211_channel *tmp_channel;
+
+	/* channel contexts */
+	struct list_head chanctx_list;
+	struct mutex chanctx_mtx;
+
+	/* SNMP counters */
+	/* dot11CountersTable */
+	u32 dot11TransmittedFragmentCount;
+	u32 dot11MulticastTransmittedFrameCount;
+	u32 dot11FailedCount;
+	u32 dot11RetryCount;
+	u32 dot11MultipleRetryCount;
+	u32 dot11FrameDuplicateCount;
+	u32 dot11ReceivedFragmentCount;
+	u32 dot11MulticastReceivedFrameCount;
+	u32 dot11TransmittedFrameCount;
+
+#ifdef CPTCFG_MAC80211_LEDS
+	int tx_led_counter, rx_led_counter;
+	struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
+	struct tpt_led_trigger *tpt_led_trigger;
+	char tx_led_name[32], rx_led_name[32],
+	     assoc_led_name[32], radio_led_name[32];
+#endif
+
+#ifdef CPTCFG_MAC80211_DEBUG_COUNTERS
+	/* TX/RX handler statistics */
+	unsigned int tx_handlers_drop;
+	unsigned int tx_handlers_queued;
+	unsigned int tx_handlers_drop_unencrypted;
+	unsigned int tx_handlers_drop_fragment;
+	unsigned int tx_handlers_drop_wep;
+	unsigned int tx_handlers_drop_not_assoc;
+	unsigned int tx_handlers_drop_unauth_port;
+	unsigned int rx_handlers_drop;
+	unsigned int rx_handlers_queued;
+	unsigned int rx_handlers_drop_nullfunc;
+	unsigned int rx_handlers_drop_defrag;
+	unsigned int rx_handlers_drop_short;
+	unsigned int tx_expand_skb_head;
+	unsigned int tx_expand_skb_head_cloned;
+	unsigned int rx_expand_skb_head;
+	unsigned int rx_expand_skb_head2;
+	unsigned int rx_handlers_fragments;
+	unsigned int tx_status_drop;
+#define I802_DEBUG_INC(c) (c)++
+#else /* CPTCFG_MAC80211_DEBUG_COUNTERS */
+#define I802_DEBUG_INC(c) do { } while (0)
+#endif /* CPTCFG_MAC80211_DEBUG_COUNTERS */
+
+
+	int total_ps_buffered; /* total number of all buffered unicast and
+				* multicast packets for power saving stations
+				*/
+
+	bool pspolling;
+	bool offchannel_ps_enabled;
+	/*
+	 * PS can only be enabled when we have exactly one managed
+	 * interface (and monitors) in PS, this then points there.
+	 */
+	struct ieee80211_sub_if_data *ps_sdata;
+	struct work_struct dynamic_ps_enable_work;
+	struct work_struct dynamic_ps_disable_work;
+	struct timer_list dynamic_ps_timer;
+	struct notifier_block network_latency_notifier;
+	struct notifier_block ifa_notifier;
+	struct notifier_block ifa6_notifier;
+
+	/*
+	 * The dynamic ps timeout configured from user space via WEXT -
+	 * this will override whatever chosen by mac80211 internally.
+	 */
+	int dynamic_ps_forced_timeout;
+
+	int user_power_level; /* in dBm, for all interfaces */
+
+	enum ieee80211_smps_mode smps_mode;
+
+	struct work_struct restart_work;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct local_debugfsdentries {
+		struct dentry *rcdir;
+		struct dentry *keys;
+	} debugfs;
+#endif
+
+	/*
+	 * Remain-on-channel support
+	 */
+	struct list_head roc_list;
+	struct work_struct hw_roc_start, hw_roc_done;
+	unsigned long hw_roc_start_time;
+	u64 roc_cookie_counter;
+
+	struct idr ack_status_frames;
+	spinlock_t ack_status_lock;
+
+	struct ieee80211_sub_if_data __rcu *p2p_sdata;
+
+	/* virtual monitor interface */
+	struct ieee80211_sub_if_data __rcu *monitor_sdata;
+	struct cfg80211_chan_def monitor_chandef;
+};
+
+static inline struct ieee80211_sub_if_data *
+IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
+{
+	return netdev_priv(dev);
+}
+
+static inline struct ieee80211_sub_if_data *
+IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
+{
+	return container_of(wdev, struct ieee80211_sub_if_data, wdev);
+}
+
+/* this struct represents 802.11n's RA/TID combination */
+struct ieee80211_ra_tid {
+	u8 ra[ETH_ALEN];
+	u16 tid;
+};
+
+/* Parsed Information Elements */
+struct ieee802_11_elems {
+	const u8 *ie_start;
+	size_t total_len;
+
+	/* pointers to IEs */
+	const u8 *ssid;
+	const u8 *supp_rates;
+	const u8 *ds_params;
+	const struct ieee80211_tim_ie *tim;
+	const u8 *challenge;
+	const u8 *rsn;
+	const u8 *erp_info;
+	const u8 *ext_supp_rates;
+	const u8 *wmm_info;
+	const u8 *wmm_param;
+	const struct ieee80211_ht_cap *ht_cap_elem;
+	const struct ieee80211_ht_operation *ht_operation;
+	const struct ieee80211_vht_cap *vht_cap_elem;
+	const struct ieee80211_vht_operation *vht_operation;
+	const struct ieee80211_meshconf_ie *mesh_config;
+	const u8 *mesh_id;
+	const u8 *peering;
+	const __le16 *awake_window;
+	const u8 *preq;
+	const u8 *prep;
+	const u8 *perr;
+	const struct ieee80211_rann_ie *rann;
+	const struct ieee80211_channel_sw_ie *ch_switch_ie;
+	const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
+	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
+	const u8 *country_elem;
+	const u8 *pwr_constr_elem;
+	const struct ieee80211_timeout_interval_ie *timeout_int;
+	const u8 *opmode_notif;
+	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
+
+	/* length of them, respectively */
+	u8 ssid_len;
+	u8 supp_rates_len;
+	u8 tim_len;
+	u8 challenge_len;
+	u8 rsn_len;
+	u8 ext_supp_rates_len;
+	u8 wmm_info_len;
+	u8 wmm_param_len;
+	u8 mesh_id_len;
+	u8 peering_len;
+	u8 preq_len;
+	u8 prep_len;
+	u8 perr_len;
+	u8 country_elem_len;
+
+	/* whether a parse error occurred while retrieving these elements */
+	bool parse_error;
+};
+
+static inline struct ieee80211_local *hw_to_local(
+	struct ieee80211_hw *hw)
+{
+	return container_of(hw, struct ieee80211_local, hw);
+}
+
+
+static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
+{
+	return ether_addr_equal(raddr, addr) ||
+	       is_broadcast_ether_addr(raddr);
+}
+
+static inline bool
+ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
+{
+	WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
+		     status->flag & RX_FLAG_MACTIME_END);
+	return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
+}
+
+u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
+				     struct ieee80211_rx_status *status,
+				     unsigned int mpdu_len,
+				     unsigned int mpdu_offset);
+int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
+void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
+void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
+				      u32 changed);
+void ieee80211_configure_filter(struct ieee80211_local *local);
+u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
+
+/* STA code */
+void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
+int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
+		       struct cfg80211_auth_request *req);
+int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
+			struct cfg80211_assoc_request *req);
+int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
+			 struct cfg80211_deauth_request *req);
+int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
+			   struct cfg80211_disassoc_request *req);
+void ieee80211_send_pspoll(struct ieee80211_local *local,
+			   struct ieee80211_sub_if_data *sdata);
+void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
+void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
+int ieee80211_max_network_latency(struct notifier_block *nb,
+				  unsigned long data, void *dummy);
+int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
+void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
+void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				  struct sk_buff *skb);
+void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
+void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
+void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
+void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
+				  __le16 fc, bool acked);
+void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
+
+/* IBSS code */
+void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
+void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
+void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
+			      const u8 *bssid, const u8 *addr, u32 supp_rates);
+int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
+			struct cfg80211_ibss_params *params);
+int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
+void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
+void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				   struct sk_buff *skb);
+
+/* mesh code */
+void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
+void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				   struct sk_buff *skb);
+
+/* scan/BSS handling */
+void ieee80211_scan_work(struct work_struct *work);
+int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
+				const u8 *ssid, u8 ssid_len,
+				struct ieee80211_channel *chan);
+int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
+			   struct cfg80211_scan_request *req);
+void ieee80211_scan_cancel(struct ieee80211_local *local);
+void ieee80211_run_deferred_scan(struct ieee80211_local *local);
+void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
+
+void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
+struct ieee80211_bss *
+ieee80211_bss_info_update(struct ieee80211_local *local,
+			  struct ieee80211_rx_status *rx_status,
+			  struct ieee80211_mgmt *mgmt,
+			  size_t len,
+			  struct ieee802_11_elems *elems,
+			  struct ieee80211_channel *channel);
+void ieee80211_rx_bss_put(struct ieee80211_local *local,
+			  struct ieee80211_bss *bss);
+
+/* scheduled scan handling */
+int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
+				       struct cfg80211_sched_scan_request *req);
+int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
+void ieee80211_sched_scan_stopped_work(struct work_struct *work);
+
+/* off-channel helpers */
+void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
+void ieee80211_offchannel_return(struct ieee80211_local *local);
+void ieee80211_roc_setup(struct ieee80211_local *local);
+void ieee80211_start_next_roc(struct ieee80211_local *local);
+void ieee80211_roc_purge(struct ieee80211_local *local,
+			 struct ieee80211_sub_if_data *sdata);
+void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
+void ieee80211_sw_roc_work(struct work_struct *work);
+void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
+
+/* interface handling */
+int ieee80211_iface_init(void);
+void ieee80211_iface_exit(void);
+int ieee80211_if_add(struct ieee80211_local *local, const char *name,
+		     struct wireless_dev **new_wdev, enum nl80211_iftype type,
+		     struct vif_params *params);
+int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
+			     enum nl80211_iftype type);
+void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
+void ieee80211_remove_interfaces(struct ieee80211_local *local);
+u32 ieee80211_idle_off(struct ieee80211_local *local);
+void ieee80211_recalc_idle(struct ieee80211_local *local);
+void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
+				    const int offset);
+int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
+void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
+int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
+void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
+
+bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
+void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
+
+static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
+{
+	return test_bit(SDATA_STATE_RUNNING, &sdata->state);
+}
+
+/* tx handling */
+void ieee80211_clear_tx_pending(struct ieee80211_local *local);
+void ieee80211_tx_pending(unsigned long data);
+netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
+					 struct net_device *dev);
+netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
+				       struct net_device *dev);
+void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
+			      struct sk_buff_head *skbs);
+
+/* HT */
+void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
+				     struct ieee80211_sta_ht_cap *ht_cap);
+bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_supported_band *sband,
+				       const struct ieee80211_ht_cap *ht_cap_ie,
+				       struct sta_info *sta);
+void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
+			  const u8 *da, u16 tid,
+			  u16 initiator, u16 reason_code);
+int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
+			       enum ieee80211_smps_mode smps, const u8 *da,
+			       const u8 *bssid);
+void ieee80211_request_smps_work(struct work_struct *work);
+
+void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
+				     u16 initiator, u16 reason, bool stop);
+void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
+				    u16 initiator, u16 reason, bool stop);
+void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
+					 enum ieee80211_agg_stop_reason reason);
+void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
+			     struct sta_info *sta,
+			     struct ieee80211_mgmt *mgmt, size_t len);
+void ieee80211_process_addba_resp(struct ieee80211_local *local,
+				  struct sta_info *sta,
+				  struct ieee80211_mgmt *mgmt,
+				  size_t len);
+void ieee80211_process_addba_request(struct ieee80211_local *local,
+				     struct sta_info *sta,
+				     struct ieee80211_mgmt *mgmt,
+				     size_t len);
+
+int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
+				   enum ieee80211_agg_stop_reason reason);
+int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
+				    enum ieee80211_agg_stop_reason reason);
+void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
+void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
+void ieee80211_ba_session_work(struct work_struct *work);
+void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
+void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
+
+u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
+
+/* VHT */
+void
+ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_supported_band *sband,
+				    const struct ieee80211_vht_cap *vht_cap_ie,
+				    struct sta_info *sta);
+enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
+void ieee80211_sta_set_rx_nss(struct sta_info *sta);
+void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
+				 struct sta_info *sta, u8 opmode,
+				 enum ieee80211_band band, bool nss_only);
+void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
+				      struct ieee80211_sta_vht_cap *vht_cap);
+
+/* Spectrum management */
+void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_mgmt *mgmt,
+				       size_t len);
+
+/* Suspend/resume and hw reconfiguration */
+int ieee80211_reconfig(struct ieee80211_local *local);
+void ieee80211_stop_device(struct ieee80211_local *local);
+
+int __ieee80211_suspend(struct ieee80211_hw *hw,
+			struct cfg80211_wowlan *wowlan);
+
+static inline int __ieee80211_resume(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
+		"%s: resume with hardware scan still in progress\n",
+		wiphy_name(hw->wiphy));
+
+	return ieee80211_reconfig(hw_to_local(hw));
+}
+
+/* utility functions/constants */
+extern void *mac80211_wiphy_privid; /* for wiphy privid */
+u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
+			enum nl80211_iftype type);
+int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
+			     int rate, int erp, int short_preamble);
+void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
+				     struct ieee80211_hdr *hdr, const u8 *tsc,
+				     gfp_t gfp);
+void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
+			       bool bss_notify);
+void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
+		    enum ieee80211_band band);
+
+void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb, int tid,
+				 enum ieee80211_band band);
+
+static inline void
+ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
+			  struct sk_buff *skb, int tid,
+			  enum ieee80211_band band)
+{
+	rcu_read_lock();
+	__ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
+	rcu_read_unlock();
+}
+
+static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
+					struct sk_buff *skb, int tid)
+{
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		kfree_skb(skb);
+		return;
+	}
+
+	__ieee80211_tx_skb_tid_band(sdata, skb, tid,
+				    chanctx_conf->def.chan->band);
+	rcu_read_unlock();
+}
+
+static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
+				    struct sk_buff *skb)
+{
+	/* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
+	ieee80211_tx_skb_tid(sdata, skb, 7);
+}
+
+u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
+			       struct ieee802_11_elems *elems,
+			       u64 filter, u32 crc);
+static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
+					  bool action,
+					  struct ieee802_11_elems *elems)
+{
+	ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
+}
+
+u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
+			      enum ieee80211_band band);
+
+void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
+void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
+void ieee80211_dynamic_ps_timer(unsigned long data);
+void ieee80211_send_nullfunc(struct ieee80211_local *local,
+			     struct ieee80211_sub_if_data *sdata,
+			     int powersave);
+void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_hdr *hdr);
+void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_hdr *hdr, bool ack);
+
+void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
+				     unsigned long queues,
+				     enum queue_stop_reason reason);
+void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
+				     unsigned long queues,
+				     enum queue_stop_reason reason);
+void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
+				    enum queue_stop_reason reason);
+void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
+				    enum queue_stop_reason reason);
+void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
+void ieee80211_add_pending_skb(struct ieee80211_local *local,
+			       struct sk_buff *skb);
+void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
+				   struct sk_buff_head *skbs,
+				   void (*fn)(void *data), void *data);
+static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local,
+					      struct sk_buff_head *skbs)
+{
+	ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
+}
+void ieee80211_flush_queues(struct ieee80211_local *local,
+			    struct ieee80211_sub_if_data *sdata);
+
+void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
+			 u16 transaction, u16 auth_alg, u16 status,
+			 const u8 *extra, size_t extra_len, const u8 *bssid,
+			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
+			 u32 tx_flags);
+void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
+				    const u8 *bssid, u16 stype, u16 reason,
+				    bool send_frame, u8 *frame_buf);
+int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
+			     size_t buffer_len, const u8 *ie, size_t ie_len,
+			     enum ieee80211_band band, u32 rate_mask,
+			     u8 channel);
+struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
+					  u8 *dst, u32 ratemask,
+					  struct ieee80211_channel *chan,
+					  const u8 *ssid, size_t ssid_len,
+					  const u8 *ie, size_t ie_len,
+					  bool directed);
+void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
+			      const u8 *ssid, size_t ssid_len,
+			      const u8 *ie, size_t ie_len,
+			      u32 ratemask, bool directed, u32 tx_flags,
+			      struct ieee80211_channel *channel, bool scan);
+
+void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
+				  const size_t supp_rates_len,
+				  const u8 *supp_rates);
+u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
+			    struct ieee802_11_elems *elems,
+			    enum ieee80211_band band, u32 *basic_rates);
+int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
+			     enum ieee80211_smps_mode smps_mode);
+void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
+
+size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
+			  const u8 *ids, int n_ids, size_t offset);
+size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
+u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
+			      u16 cap);
+u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
+			       const struct cfg80211_chan_def *chandef,
+			       u16 prot_mode);
+u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
+			       u32 cap);
+int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
+			    struct sk_buff *skb, bool need_basic,
+			    enum ieee80211_band band);
+int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
+				struct sk_buff *skb, bool need_basic,
+				enum ieee80211_band band);
+
+/* channel management */
+void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
+				  const struct ieee80211_ht_operation *ht_oper,
+				  struct cfg80211_chan_def *chandef);
+
+int __must_check
+ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
+			  const struct cfg80211_chan_def *chandef,
+			  enum ieee80211_chanctx_mode mode);
+int __must_check
+ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
+			       const struct cfg80211_chan_def *chandef,
+			       u32 *changed);
+void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
+void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
+void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
+					 bool clear);
+
+void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
+				   struct ieee80211_chanctx *chanctx);
+void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
+				    struct ieee80211_chanctx *chanctx);
+
+void ieee80211_dfs_cac_timer(unsigned long data);
+void ieee80211_dfs_cac_timer_work(struct work_struct *work);
+void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
+void ieee80211_dfs_radar_detected_work(struct work_struct *work);
+
+#ifdef CPTCFG_MAC80211_NOINLINE
+#define debug_noinline noinline
+#else
+#define debug_noinline
+#endif
+
+#endif /* IEEE80211_I_H */
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
new file mode 100644
index 0000000..77b05b0
--- /dev/null
+++ b/net/mac80211/iface.c
@@ -0,0 +1,1828 @@
+/*
+ * Interface handling
+ *
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <net/mac80211.h>
+#include <net/ieee80211_radiotap.h>
+#include "ieee80211_i.h"
+#include "sta_info.h"
+#include "debugfs_netdev.h"
+#include "mesh.h"
+#include "led.h"
+#include "driver-ops.h"
+#include "wme.h"
+#include "rate.h"
+
+/**
+ * DOC: Interface list locking
+ *
+ * The interface list in each struct ieee80211_local is protected
+ * three-fold:
+ *
+ * (1) modifications may only be done under the RTNL
+ * (2) modifications and readers are protected against each other by
+ *     the iflist_mtx.
+ * (3) modifications are done in an RCU manner so atomic readers
+ *     can traverse the list in RCU-safe blocks.
+ *
+ * As a consequence, reads (traversals) of the list can be protected
+ * by either the RTNL, the iflist_mtx or RCU.
+ */
+
+bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	int power;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!chanctx_conf) {
+		rcu_read_unlock();
+		return false;
+	}
+
+	power = chanctx_conf->def.chan->max_power;
+	rcu_read_unlock();
+
+	if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
+		power = min(power, sdata->user_power_level);
+
+	if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
+		power = min(power, sdata->ap_power_level);
+
+	if (power != sdata->vif.bss_conf.txpower) {
+		sdata->vif.bss_conf.txpower = power;
+		ieee80211_hw_config(sdata->local, 0);
+		return true;
+	}
+
+	return false;
+}
+
+void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
+{
+	if (__ieee80211_recalc_txpower(sdata))
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
+}
+
+static u32 __ieee80211_idle_off(struct ieee80211_local *local)
+{
+	if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
+		return 0;
+
+	local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
+	return IEEE80211_CONF_CHANGE_IDLE;
+}
+
+static u32 __ieee80211_idle_on(struct ieee80211_local *local)
+{
+	if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
+		return 0;
+
+	ieee80211_flush_queues(local, NULL);
+
+	local->hw.conf.flags |= IEEE80211_CONF_IDLE;
+	return IEEE80211_CONF_CHANGE_IDLE;
+}
+
+static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
+				   bool force_active)
+{
+	bool working = false, scanning, active;
+	unsigned int led_trig_start = 0, led_trig_stop = 0;
+	struct ieee80211_roc_work *roc;
+
+	lockdep_assert_held(&local->mtx);
+
+	active = force_active ||
+		 !list_empty(&local->chanctx_list) ||
+		 local->monitors;
+
+	if (!local->ops->remain_on_channel) {
+		list_for_each_entry(roc, &local->roc_list, list) {
+			working = true;
+			break;
+		}
+	}
+
+	scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+		   test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
+
+	if (working || scanning)
+		led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
+	else
+		led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
+
+	if (active)
+		led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
+	else
+		led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
+
+	ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
+
+	if (working || scanning || active)
+		return __ieee80211_idle_off(local);
+	return __ieee80211_idle_on(local);
+}
+
+u32 ieee80211_idle_off(struct ieee80211_local *local)
+{
+	return __ieee80211_recalc_idle(local, true);
+}
+
+void ieee80211_recalc_idle(struct ieee80211_local *local)
+{
+	u32 change = __ieee80211_recalc_idle(local, false);
+	if (change)
+		ieee80211_hw_config(local, change);
+}
+
+static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
+{
+	if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
+		return -EINVAL;
+
+	dev->mtu = new_mtu;
+	return 0;
+}
+
+static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_sub_if_data *iter;
+	u64 new, mask, tmp;
+	u8 *m;
+	int ret = 0;
+
+	if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
+		return 0;
+
+	m = addr;
+	new =	((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
+		((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
+		((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
+
+	m = local->hw.wiphy->addr_mask;
+	mask =	((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
+		((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
+		((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
+
+
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(iter, &local->interfaces, list) {
+		if (iter == sdata)
+			continue;
+
+		if (iter->vif.type == NL80211_IFTYPE_MONITOR)
+			continue;
+
+		m = iter->vif.addr;
+		tmp =	((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
+			((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
+			((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
+
+		if ((new & ~mask) != (tmp & ~mask)) {
+			ret = -EINVAL;
+			break;
+		}
+	}
+	mutex_unlock(&local->iflist_mtx);
+
+	return ret;
+}
+
+static int ieee80211_change_mac(struct net_device *dev, void *addr)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct sockaddr *sa = addr;
+	int ret;
+
+	if (ieee80211_sdata_running(sdata))
+		return -EBUSY;
+
+	ret = ieee80211_verify_mac(sdata, sa->sa_data);
+	if (ret)
+		return ret;
+
+	ret = eth_mac_addr(dev, sa);
+
+	if (ret == 0)
+		memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
+
+	return ret;
+}
+
+static inline int identical_mac_addr_allowed(int type1, int type2)
+{
+	return type1 == NL80211_IFTYPE_MONITOR ||
+		type2 == NL80211_IFTYPE_MONITOR ||
+		type1 == NL80211_IFTYPE_P2P_DEVICE ||
+		type2 == NL80211_IFTYPE_P2P_DEVICE ||
+		(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
+		(type1 == NL80211_IFTYPE_WDS &&
+			(type2 == NL80211_IFTYPE_WDS ||
+			 type2 == NL80211_IFTYPE_AP)) ||
+		(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
+		(type1 == NL80211_IFTYPE_AP_VLAN &&
+			(type2 == NL80211_IFTYPE_AP ||
+			 type2 == NL80211_IFTYPE_AP_VLAN));
+}
+
+static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
+					    enum nl80211_iftype iftype)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_sub_if_data *nsdata;
+
+	ASSERT_RTNL();
+
+	/* we hold the RTNL here so can safely walk the list */
+	list_for_each_entry(nsdata, &local->interfaces, list) {
+		if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
+			/*
+			 * Allow only a single IBSS interface to be up at any
+			 * time. This is restricted because beacon distribution
+			 * cannot work properly if both are in the same IBSS.
+			 *
+			 * To remove this restriction we'd have to disallow them
+			 * from setting the same SSID on different IBSS interfaces
+			 * belonging to the same hardware. Then, however, we're
+			 * faced with having to adopt two different TSF timers...
+			 */
+			if (iftype == NL80211_IFTYPE_ADHOC &&
+			    nsdata->vif.type == NL80211_IFTYPE_ADHOC)
+				return -EBUSY;
+
+			/*
+			 * The remaining checks are only performed for interfaces
+			 * with the same MAC address.
+			 */
+			if (!ether_addr_equal(sdata->vif.addr,
+					      nsdata->vif.addr))
+				continue;
+
+			/*
+			 * check whether it may have the same address
+			 */
+			if (!identical_mac_addr_allowed(iftype,
+							nsdata->vif.type))
+				return -ENOTUNIQ;
+
+			/*
+			 * can only add VLANs to enabled APs
+			 */
+			if (iftype == NL80211_IFTYPE_AP_VLAN &&
+			    nsdata->vif.type == NL80211_IFTYPE_AP)
+				sdata->bss = &nsdata->u.ap;
+		}
+	}
+
+	return 0;
+}
+
+static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
+{
+	int n_queues = sdata->local->hw.queues;
+	int i;
+
+	if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
+		for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+			if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
+					 IEEE80211_INVAL_HW_QUEUE))
+				return -EINVAL;
+			if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
+					 n_queues))
+				return -EINVAL;
+		}
+	}
+
+	if ((sdata->vif.type != NL80211_IFTYPE_AP &&
+	     sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
+	    !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
+		sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
+		return 0;
+	}
+
+	if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
+		return -EINVAL;
+
+	if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
+		return -EINVAL;
+
+	return 0;
+}
+
+void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
+				    const int offset)
+{
+	struct ieee80211_local *local = sdata->local;
+	u32 flags = sdata->u.mntr_flags;
+
+#define ADJUST(_f, _s)	do {					\
+	if (flags & MONITOR_FLAG_##_f)				\
+		local->fif_##_s += offset;			\
+	} while (0)
+
+	ADJUST(FCSFAIL, fcsfail);
+	ADJUST(PLCPFAIL, plcpfail);
+	ADJUST(CONTROL, control);
+	ADJUST(CONTROL, pspoll);
+	ADJUST(OTHER_BSS, other_bss);
+
+#undef ADJUST
+}
+
+static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	int i;
+
+	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+		if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
+			sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
+		else if (local->hw.queues >= IEEE80211_NUM_ACS)
+			sdata->vif.hw_queue[i] = i;
+		else
+			sdata->vif.hw_queue[i] = 0;
+	}
+	sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
+}
+
+int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+	int ret;
+
+	if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
+		return 0;
+
+	ASSERT_RTNL();
+
+	if (local->monitor_sdata)
+		return 0;
+
+	sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
+	if (!sdata)
+		return -ENOMEM;
+
+	/* set up data */
+	sdata->local = local;
+	sdata->vif.type = NL80211_IFTYPE_MONITOR;
+	snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
+		 wiphy_name(local->hw.wiphy));
+
+	ieee80211_set_default_queues(sdata);
+
+	ret = drv_add_interface(local, sdata);
+	if (WARN_ON(ret)) {
+		/* ok .. stupid driver, it asked for this! */
+		kfree(sdata);
+		return ret;
+	}
+
+	ret = ieee80211_check_queues(sdata);
+	if (ret) {
+		kfree(sdata);
+		return ret;
+	}
+
+	ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
+					IEEE80211_CHANCTX_EXCLUSIVE);
+	if (ret) {
+		drv_remove_interface(local, sdata);
+		kfree(sdata);
+		return ret;
+	}
+
+	mutex_lock(&local->iflist_mtx);
+	rcu_assign_pointer(local->monitor_sdata, sdata);
+	mutex_unlock(&local->iflist_mtx);
+
+	return 0;
+}
+
+void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
+		return;
+
+	ASSERT_RTNL();
+
+	mutex_lock(&local->iflist_mtx);
+
+	sdata = rcu_dereference_protected(local->monitor_sdata,
+					  lockdep_is_held(&local->iflist_mtx));
+	if (!sdata) {
+		mutex_unlock(&local->iflist_mtx);
+		return;
+	}
+
+	rcu_assign_pointer(local->monitor_sdata, NULL);
+	mutex_unlock(&local->iflist_mtx);
+
+	synchronize_net();
+
+	ieee80211_vif_release_channel(sdata);
+
+	drv_remove_interface(local, sdata);
+
+	kfree(sdata);
+}
+
+/*
+ * NOTE: Be very careful when changing this function, it must NOT return
+ * an error on interface type changes that have been pre-checked, so most
+ * checks should be in ieee80211_check_concurrent_iface.
+ */
+int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	struct net_device *dev = wdev->netdev;
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	u32 changed = 0;
+	int res;
+	u32 hw_reconf_flags = 0;
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_WDS:
+		if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
+			return -ENOLINK;
+		break;
+	case NL80211_IFTYPE_AP_VLAN: {
+		struct ieee80211_sub_if_data *master;
+
+		if (!sdata->bss)
+			return -ENOLINK;
+
+		list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
+
+		master = container_of(sdata->bss,
+				      struct ieee80211_sub_if_data, u.ap);
+		sdata->control_port_protocol =
+			master->control_port_protocol;
+		sdata->control_port_no_encrypt =
+			master->control_port_no_encrypt;
+		sdata->vif.cab_queue = master->vif.cab_queue;
+		memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
+		       sizeof(sdata->vif.hw_queue));
+		break;
+		}
+	case NL80211_IFTYPE_AP:
+		sdata->bss = &sdata->u.ap;
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_MONITOR:
+	case NL80211_IFTYPE_ADHOC:
+	case NL80211_IFTYPE_P2P_DEVICE:
+		/* no special treatment */
+		break;
+	case NL80211_IFTYPE_UNSPECIFIED:
+	case NUM_NL80211_IFTYPES:
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_P2P_GO:
+		/* cannot happen */
+		WARN_ON(1);
+		break;
+	}
+
+	if (local->open_count == 0) {
+		res = drv_start(local);
+		if (res)
+			goto err_del_bss;
+		/* we're brought up, everything changes */
+		hw_reconf_flags = ~0;
+		ieee80211_led_radio(local, true);
+		ieee80211_mod_tpt_led_trig(local,
+					   IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
+	}
+
+	/*
+	 * Copy the hopefully now-present MAC address to
+	 * this interface, if it has the special null one.
+	 */
+	if (dev && is_zero_ether_addr(dev->dev_addr)) {
+		memcpy(dev->dev_addr,
+		       local->hw.wiphy->perm_addr,
+		       ETH_ALEN);
+		memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
+
+		if (!is_valid_ether_addr(dev->dev_addr)) {
+			res = -EADDRNOTAVAIL;
+			goto err_stop;
+		}
+	}
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP_VLAN:
+		/* no need to tell driver, but set carrier and chanctx */
+		if (rtnl_dereference(sdata->bss->beacon)) {
+			ieee80211_vif_vlan_copy_chanctx(sdata);
+			netif_carrier_on(dev);
+		} else {
+			netif_carrier_off(dev);
+		}
+		break;
+	case NL80211_IFTYPE_MONITOR:
+		if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
+			local->cooked_mntrs++;
+			break;
+		}
+
+		if (local->monitors == 0 && local->open_count == 0) {
+			res = ieee80211_add_virtual_monitor(local);
+			if (res)
+				goto err_stop;
+		}
+
+		/* must be before the call to ieee80211_configure_filter */
+		local->monitors++;
+		if (local->monitors == 1) {
+			local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
+			hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
+		}
+
+		ieee80211_adjust_monitor_flags(sdata, 1);
+		ieee80211_configure_filter(local);
+		mutex_lock(&local->mtx);
+		ieee80211_recalc_idle(local);
+		mutex_unlock(&local->mtx);
+
+		netif_carrier_on(dev);
+		break;
+	default:
+		if (coming_up) {
+			ieee80211_del_virtual_monitor(local);
+
+			res = drv_add_interface(local, sdata);
+			if (res)
+				goto err_stop;
+			res = ieee80211_check_queues(sdata);
+			if (res)
+				goto err_del_interface;
+		}
+
+		if (sdata->vif.type == NL80211_IFTYPE_AP) {
+			local->fif_pspoll++;
+			local->fif_probe_req++;
+
+			ieee80211_configure_filter(local);
+		} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+			local->fif_probe_req++;
+		}
+
+		if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
+			changed |= ieee80211_reset_erp_info(sdata);
+		ieee80211_bss_info_change_notify(sdata, changed);
+
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_STATION:
+		case NL80211_IFTYPE_ADHOC:
+		case NL80211_IFTYPE_AP:
+		case NL80211_IFTYPE_MESH_POINT:
+			netif_carrier_off(dev);
+			break;
+		case NL80211_IFTYPE_WDS:
+		case NL80211_IFTYPE_P2P_DEVICE:
+			break;
+		default:
+			/* not reached */
+			WARN_ON(1);
+		}
+
+		/*
+		 * set default queue parameters so drivers don't
+		 * need to initialise the hardware if the hardware
+		 * doesn't start up with sane defaults
+		 */
+		ieee80211_set_wmm_default(sdata, true);
+	}
+
+	set_bit(SDATA_STATE_RUNNING, &sdata->state);
+
+	if (sdata->vif.type == NL80211_IFTYPE_WDS) {
+		/* Create STA entry for the WDS peer */
+		sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
+				     GFP_KERNEL);
+		if (!sta) {
+			res = -ENOMEM;
+			goto err_del_interface;
+		}
+
+		sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+		sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+		sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+
+		res = sta_info_insert(sta);
+		if (res) {
+			/* STA has been freed */
+			goto err_del_interface;
+		}
+
+		rate_control_rate_init(sta);
+		netif_carrier_on(dev);
+	} else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
+		rcu_assign_pointer(local->p2p_sdata, sdata);
+	}
+
+	/*
+	 * set_multicast_list will be invoked by the networking core
+	 * which will check whether any increments here were done in
+	 * error and sync them down to the hardware as filter flags.
+	 */
+	if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+		atomic_inc(&local->iff_allmultis);
+
+	if (sdata->flags & IEEE80211_SDATA_PROMISC)
+		atomic_inc(&local->iff_promiscs);
+
+	if (coming_up)
+		local->open_count++;
+
+	if (hw_reconf_flags)
+		ieee80211_hw_config(local, hw_reconf_flags);
+
+	ieee80211_recalc_ps(local, -1);
+
+	if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		/* XXX: for AP_VLAN, actually track AP queues */
+		netif_tx_start_all_queues(dev);
+	} else if (dev) {
+		unsigned long flags;
+		int n_acs = IEEE80211_NUM_ACS;
+		int ac;
+
+		if (local->hw.queues < IEEE80211_NUM_ACS)
+			n_acs = 1;
+
+		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+		if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
+		    (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
+		     skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
+			for (ac = 0; ac < n_acs; ac++) {
+				int ac_queue = sdata->vif.hw_queue[ac];
+
+				if (local->queue_stop_reasons[ac_queue] == 0 &&
+				    skb_queue_empty(&local->pending[ac_queue]))
+					netif_start_subqueue(dev, ac);
+			}
+		}
+		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+	}
+
+	return 0;
+ err_del_interface:
+	drv_remove_interface(local, sdata);
+ err_stop:
+	if (!local->open_count)
+		drv_stop(local);
+ err_del_bss:
+	sdata->bss = NULL;
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+		list_del(&sdata->u.vlan.list);
+	/* might already be clear but that doesn't matter */
+	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
+	return res;
+}
+
+static int ieee80211_open(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int err;
+
+	/* fail early if user set an invalid address */
+	if (!is_valid_ether_addr(dev->dev_addr))
+		return -EADDRNOTAVAIL;
+
+	err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
+	if (err)
+		return err;
+
+	return ieee80211_do_open(&sdata->wdev, true);
+}
+
+static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
+			      bool going_down)
+{
+	struct ieee80211_local *local = sdata->local;
+	unsigned long flags;
+	struct sk_buff *skb, *tmp;
+	u32 hw_reconf_flags = 0;
+	int i, flushed;
+	struct ps_data *ps;
+
+	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
+
+	if (rcu_access_pointer(local->scan_sdata) == sdata)
+		ieee80211_scan_cancel(local);
+
+	/*
+	 * Stop TX on this interface first.
+	 */
+	if (sdata->dev)
+		netif_tx_stop_all_queues(sdata->dev);
+
+	ieee80211_roc_purge(local, sdata);
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION)
+		ieee80211_mgd_stop(sdata);
+
+	/*
+	 * Remove all stations associated with this interface.
+	 *
+	 * This must be done before calling ops->remove_interface()
+	 * because otherwise we can later invoke ops->sta_notify()
+	 * whenever the STAs are removed, and that invalidates driver
+	 * assumptions about always getting a vif pointer that is valid
+	 * (because if we remove a STA after ops->remove_interface()
+	 * the driver will have removed the vif info already!)
+	 *
+	 * This is relevant only in WDS mode, in all other modes we've
+	 * already removed all stations when disconnecting or similar,
+	 * so warn otherwise.
+	 *
+	 * We call sta_info_flush_cleanup() later, to combine RCU waits.
+	 */
+	flushed = sta_info_flush_defer(sdata);
+	WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
+		     (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
+
+	/* don't count this interface for promisc/allmulti while it is down */
+	if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+		atomic_dec(&local->iff_allmultis);
+
+	if (sdata->flags & IEEE80211_SDATA_PROMISC)
+		atomic_dec(&local->iff_promiscs);
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		local->fif_pspoll--;
+		local->fif_probe_req--;
+	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+		local->fif_probe_req--;
+	}
+
+	if (sdata->dev) {
+		netif_addr_lock_bh(sdata->dev);
+		spin_lock_bh(&local->filter_lock);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+		__hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
+				 sdata->dev->addr_len);
+#else
+		__dev_addr_unsync(&local->mc_list, &local->mc_count,
+				  &sdata->dev->mc_list, &sdata->dev->mc_count);
+#endif
+		spin_unlock_bh(&local->filter_lock);
+		netif_addr_unlock_bh(sdata->dev);
+	}
+
+	del_timer_sync(&local->dynamic_ps_timer);
+	cancel_work_sync(&local->dynamic_ps_enable_work);
+
+	cancel_work_sync(&sdata->recalc_smps);
+
+	cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
+
+	if (sdata->wdev.cac_started) {
+		WARN_ON(local->suspended);
+		mutex_lock(&local->iflist_mtx);
+		ieee80211_vif_release_channel(sdata);
+		mutex_unlock(&local->iflist_mtx);
+		cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
+				   GFP_KERNEL);
+	}
+
+	/* APs need special treatment */
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		struct ieee80211_sub_if_data *vlan, *tmpsdata;
+
+		/* down all dependent devices, that is VLANs */
+		list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
+					 u.vlan.list)
+			dev_close(vlan->dev);
+		WARN_ON(!list_empty(&sdata->u.ap.vlans));
+	} else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		/* remove all packets in parent bc_buf pointing to this dev */
+		ps = &sdata->bss->ps;
+
+		spin_lock_irqsave(&ps->bc_buf.lock, flags);
+		skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
+			if (skb->dev == sdata->dev) {
+				__skb_unlink(skb, &ps->bc_buf);
+				local->total_ps_buffered--;
+				ieee80211_free_txskb(&local->hw, skb);
+			}
+		}
+		spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
+	}
+
+	if (going_down)
+		local->open_count--;
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP_VLAN:
+		list_del(&sdata->u.vlan.list);
+		rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
+		/* no need to tell driver */
+		break;
+	case NL80211_IFTYPE_MONITOR:
+		if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
+			local->cooked_mntrs--;
+			break;
+		}
+
+		local->monitors--;
+		if (local->monitors == 0) {
+			local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
+			hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
+		}
+
+		ieee80211_adjust_monitor_flags(sdata, -1);
+		break;
+	case NL80211_IFTYPE_P2P_DEVICE:
+		/* relies on synchronize_rcu() below */
+		rcu_assign_pointer(local->p2p_sdata, NULL);
+		/* fall through */
+	default:
+		cancel_work_sync(&sdata->work);
+		/*
+		 * When we get here, the interface is marked down.
+		 *
+		 * sta_info_flush_cleanup() requires rcu_barrier()
+		 * first to wait for the station call_rcu() calls
+		 * to complete, and we also need synchronize_rcu()
+		 * to wait for the RX path in case it is using the
+		 * interface and enqueuing frames at this very time on
+		 * another CPU.
+		 */
+		synchronize_rcu();
+		rcu_barrier();
+		sta_info_flush_cleanup(sdata);
+
+		/*
+		 * Free all remaining keys, there shouldn't be any,
+		 * except maybe in WDS mode?
+		 */
+		ieee80211_free_keys(sdata);
+
+		/* fall through */
+	case NL80211_IFTYPE_AP:
+		skb_queue_purge(&sdata->skb_queue);
+	}
+
+	sdata->bss = NULL;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
+		skb_queue_walk_safe(&local->pending[i], skb, tmp) {
+			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+			if (info->control.vif == &sdata->vif) {
+				__skb_unlink(skb, &local->pending[i]);
+				ieee80211_free_txskb(&local->hw, skb);
+			}
+		}
+	}
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+	if (local->open_count == 0)
+		ieee80211_clear_tx_pending(local);
+
+	/*
+	 * If the interface goes down while suspended, presumably because
+	 * the device was unplugged and that happens before our resume,
+	 * then the driver is already unconfigured and the remainder of
+	 * this function isn't needed.
+	 * XXX: what about WoWLAN? If the device has software state, e.g.
+	 *	memory allocated, it might expect teardown commands from
+	 *	mac80211 here?
+	 */
+	if (local->suspended) {
+		WARN_ON(local->wowlan);
+		WARN_ON(rtnl_dereference(local->monitor_sdata));
+		return;
+	}
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP_VLAN:
+		break;
+	case NL80211_IFTYPE_MONITOR:
+		if (local->monitors == 0)
+			ieee80211_del_virtual_monitor(local);
+
+		mutex_lock(&local->mtx);
+		ieee80211_recalc_idle(local);
+		mutex_unlock(&local->mtx);
+		break;
+	default:
+		if (going_down)
+			drv_remove_interface(local, sdata);
+	}
+
+	ieee80211_recalc_ps(local, -1);
+
+	if (local->open_count == 0) {
+		ieee80211_stop_device(local);
+
+		/* no reconfiguring after stop! */
+		return;
+	}
+
+	/* do after stop to avoid reconfiguring when we stop anyway */
+	ieee80211_configure_filter(local);
+	ieee80211_hw_config(local, hw_reconf_flags);
+
+	if (local->monitors == local->open_count)
+		ieee80211_add_virtual_monitor(local);
+}
+
+static int ieee80211_stop(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	ieee80211_do_stop(sdata, true);
+
+	return 0;
+}
+
+static void ieee80211_set_multicast_list(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	int allmulti, promisc, sdata_allmulti, sdata_promisc;
+
+	allmulti = !!(dev->flags & IFF_ALLMULTI);
+	promisc = !!(dev->flags & IFF_PROMISC);
+	sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
+	sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
+
+	if (allmulti != sdata_allmulti) {
+		if (dev->flags & IFF_ALLMULTI)
+			atomic_inc(&local->iff_allmultis);
+		else
+			atomic_dec(&local->iff_allmultis);
+		sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
+	}
+
+	if (promisc != sdata_promisc) {
+		if (dev->flags & IFF_PROMISC)
+			atomic_inc(&local->iff_promiscs);
+		else
+			atomic_dec(&local->iff_promiscs);
+		sdata->flags ^= IEEE80211_SDATA_PROMISC;
+	}
+
+	/*
+	 * TODO: If somebody needs this on AP interfaces,
+	 *	 it can be enabled easily but multicast
+	 *	 addresses from VLANs need to be synced.
+	 */
+	if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+	    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+	    sdata->vif.type != NL80211_IFTYPE_AP)
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+		drv_set_multicast_list(local, sdata, &dev->mc);
+#else
+		drv_set_multicast_list(local, sdata, dev->mc_count,
+				       dev->mc_list);
+#endif
+
+	spin_lock_bh(&local->filter_lock);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+	__hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
+#else
+	__dev_addr_sync(&local->mc_list, &local->mc_count,
+			&dev->mc_list, &dev->mc_count);
+#endif
+	spin_unlock_bh(&local->filter_lock);
+	ieee80211_queue_work(&local->hw, &local->reconfig_filter);
+}
+
+/*
+ * Called when the netdev is removed or, by the code below, before
+ * the interface type changes.
+ */
+static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	int flushed;
+	int i;
+
+	/* free extra data */
+	ieee80211_free_keys(sdata);
+
+	ieee80211_debugfs_remove_netdev(sdata);
+
+	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
+		__skb_queue_purge(&sdata->fragments[i].skb_list);
+	sdata->fragment_next = 0;
+
+	if (ieee80211_vif_is_mesh(&sdata->vif))
+		mesh_rmc_free(sdata);
+
+	flushed = sta_info_flush(sdata);
+	WARN_ON(flushed);
+}
+
+static void ieee80211_uninit(struct net_device *dev)
+{
+	ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
+}
+
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+					 struct sk_buff *skb)
+{
+	return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
+}
+
+static const struct net_device_ops ieee80211_dataif_ops = {
+	.ndo_open		= ieee80211_open,
+	.ndo_stop		= ieee80211_stop,
+	.ndo_uninit		= ieee80211_uninit,
+	.ndo_start_xmit		= ieee80211_subif_start_xmit,
+	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
+	.ndo_change_mtu 	= ieee80211_change_mtu,
+	.ndo_set_mac_address 	= ieee80211_change_mac,
+	.ndo_select_queue	= ieee80211_netdev_select_queue,
+};
+
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+					  struct sk_buff *skb)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_hdr *hdr;
+	struct ieee80211_radiotap_header *rtap = (void *)skb->data;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return 0;
+
+	if (skb->len < 4 ||
+	    skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
+		return 0; /* doesn't matter, frame will be dropped */
+
+	hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
+
+	return ieee80211_select_queue_80211(sdata, skb, hdr);
+}
+
+static const struct net_device_ops ieee80211_monitorif_ops = {
+	.ndo_open		= ieee80211_open,
+	.ndo_stop		= ieee80211_stop,
+	.ndo_uninit		= ieee80211_uninit,
+	.ndo_start_xmit		= ieee80211_monitor_start_xmit,
+	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
+	.ndo_change_mtu 	= ieee80211_change_mtu,
+	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_select_queue	= ieee80211_monitor_select_queue,
+};
+
+static void ieee80211_if_setup(struct net_device *dev)
+{
+	ether_setup(dev);
+	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+	netdev_attach_ops(dev, &ieee80211_dataif_ops);
+	dev->destructor = free_netdev;
+}
+
+static void ieee80211_iface_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data, work);
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct sta_info *sta;
+	struct ieee80211_ra_tid *ra_tid;
+
+	if (!ieee80211_sdata_running(sdata))
+		return;
+
+	if (local->scanning)
+		return;
+
+	/*
+	 * ieee80211_queue_work() should have picked up most cases,
+	 * here we'll pick the rest.
+	 */
+	if (WARN(local->suspended,
+		 "interface work scheduled while going to suspend\n"))
+		return;
+
+	/* first process frames */
+	while ((skb = skb_dequeue(&sdata->skb_queue))) {
+		struct ieee80211_mgmt *mgmt = (void *)skb->data;
+
+		if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
+			ra_tid = (void *)&skb->cb;
+			ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
+						 ra_tid->tid);
+		} else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
+			ra_tid = (void *)&skb->cb;
+			ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
+						ra_tid->tid);
+		} else if (ieee80211_is_action(mgmt->frame_control) &&
+			   mgmt->u.action.category == WLAN_CATEGORY_BACK) {
+			int len = skb->len;
+
+			mutex_lock(&local->sta_mtx);
+			sta = sta_info_get_bss(sdata, mgmt->sa);
+			if (sta) {
+				switch (mgmt->u.action.u.addba_req.action_code) {
+				case WLAN_ACTION_ADDBA_REQ:
+					ieee80211_process_addba_request(
+							local, sta, mgmt, len);
+					break;
+				case WLAN_ACTION_ADDBA_RESP:
+					ieee80211_process_addba_resp(local, sta,
+								     mgmt, len);
+					break;
+				case WLAN_ACTION_DELBA:
+					ieee80211_process_delba(sdata, sta,
+								mgmt, len);
+					break;
+				default:
+					WARN_ON(1);
+					break;
+				}
+			}
+			mutex_unlock(&local->sta_mtx);
+		} else if (ieee80211_is_data_qos(mgmt->frame_control)) {
+			struct ieee80211_hdr *hdr = (void *)mgmt;
+			/*
+			 * So the frame isn't mgmt, but frame_control
+			 * is at the right place anyway, of course, so
+			 * the if statement is correct.
+			 *
+			 * Warn if we have other data frame types here,
+			 * they must not get here.
+			 */
+			WARN_ON(hdr->frame_control &
+					cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
+			WARN_ON(!(hdr->seq_ctrl &
+					cpu_to_le16(IEEE80211_SCTL_FRAG)));
+			/*
+			 * This was a fragment of a frame, received while
+			 * a block-ack session was active. That cannot be
+			 * right, so terminate the session.
+			 */
+			mutex_lock(&local->sta_mtx);
+			sta = sta_info_get_bss(sdata, mgmt->sa);
+			if (sta) {
+				u16 tid = *ieee80211_get_qos_ctl(hdr) &
+						IEEE80211_QOS_CTL_TID_MASK;
+
+				__ieee80211_stop_rx_ba_session(
+					sta, tid, WLAN_BACK_RECIPIENT,
+					WLAN_REASON_QSTA_REQUIRE_SETUP,
+					true);
+			}
+			mutex_unlock(&local->sta_mtx);
+		} else switch (sdata->vif.type) {
+		case NL80211_IFTYPE_STATION:
+			ieee80211_sta_rx_queued_mgmt(sdata, skb);
+			break;
+		case NL80211_IFTYPE_ADHOC:
+			ieee80211_ibss_rx_queued_mgmt(sdata, skb);
+			break;
+		case NL80211_IFTYPE_MESH_POINT:
+			if (!ieee80211_vif_is_mesh(&sdata->vif))
+				break;
+			ieee80211_mesh_rx_queued_mgmt(sdata, skb);
+			break;
+		default:
+			WARN(1, "frame for unexpected interface type");
+			break;
+		}
+
+		kfree_skb(skb);
+	}
+
+	/* then other type-dependent work */
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_STATION:
+		ieee80211_sta_work(sdata);
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		ieee80211_ibss_work(sdata);
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+		if (!ieee80211_vif_is_mesh(&sdata->vif))
+			break;
+		ieee80211_mesh_work(sdata);
+		break;
+	default:
+		break;
+	}
+}
+
+static void ieee80211_recalc_smps_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data, recalc_smps);
+
+	ieee80211_recalc_smps(sdata);
+}
+
+/*
+ * Helper function to initialise an interface to a specific type.
+ */
+static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
+				  enum nl80211_iftype type)
+{
+	/* clear type-dependent union */
+	memset(&sdata->u, 0, sizeof(sdata->u));
+
+	/* and set some type-dependent values */
+	sdata->vif.type = type;
+	sdata->vif.p2p = false;
+	sdata->wdev.iftype = type;
+
+	sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
+	sdata->control_port_no_encrypt = false;
+
+	sdata->noack_map = 0;
+
+	/* only monitor/p2p-device differ */
+	if (sdata->dev) {
+		netdev_attach_ops(sdata->dev, &ieee80211_dataif_ops);
+		sdata->dev->type = ARPHRD_ETHER;
+	}
+
+	skb_queue_head_init(&sdata->skb_queue);
+	INIT_WORK(&sdata->work, ieee80211_iface_work);
+	INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
+
+	switch (type) {
+	case NL80211_IFTYPE_P2P_GO:
+		type = NL80211_IFTYPE_AP;
+		sdata->vif.type = type;
+		sdata->vif.p2p = true;
+		/* fall through */
+	case NL80211_IFTYPE_AP:
+		skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
+		INIT_LIST_HEAD(&sdata->u.ap.vlans);
+		sdata->vif.bss_conf.bssid = sdata->vif.addr;
+		break;
+	case NL80211_IFTYPE_P2P_CLIENT:
+		type = NL80211_IFTYPE_STATION;
+		sdata->vif.type = type;
+		sdata->vif.p2p = true;
+		/* fall through */
+	case NL80211_IFTYPE_STATION:
+		sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
+		ieee80211_sta_setup_sdata(sdata);
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
+		ieee80211_ibss_setup_sdata(sdata);
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+		if (ieee80211_vif_is_mesh(&sdata->vif))
+			ieee80211_mesh_init_sdata(sdata);
+		break;
+	case NL80211_IFTYPE_MONITOR:
+		sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
+		netdev_attach_ops(sdata->dev, &ieee80211_monitorif_ops);
+		sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
+				      MONITOR_FLAG_OTHER_BSS;
+		break;
+	case NL80211_IFTYPE_WDS:
+		sdata->vif.bss_conf.bssid = NULL;
+		break;
+	case NL80211_IFTYPE_AP_VLAN:
+		break;
+	case NL80211_IFTYPE_P2P_DEVICE:
+		sdata->vif.bss_conf.bssid = sdata->vif.addr;
+		break;
+	case NL80211_IFTYPE_UNSPECIFIED:
+	case NUM_NL80211_IFTYPES:
+		BUG();
+		break;
+	}
+
+	ieee80211_debugfs_add_netdev(sdata);
+}
+
+static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
+					   enum nl80211_iftype type)
+{
+	struct ieee80211_local *local = sdata->local;
+	int ret, err;
+	enum nl80211_iftype internal_type = type;
+	bool p2p = false;
+
+	ASSERT_RTNL();
+
+	if (!local->ops->change_interface)
+		return -EBUSY;
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_ADHOC:
+		/*
+		 * Could maybe also all others here?
+		 * Just not sure how that interacts
+		 * with the RX/config path e.g. for
+		 * mesh.
+		 */
+		break;
+	default:
+		return -EBUSY;
+	}
+
+	switch (type) {
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_ADHOC:
+		/*
+		 * Could probably support everything
+		 * but WDS here (WDS do_open can fail
+		 * under memory pressure, which this
+		 * code isn't prepared to handle).
+		 */
+		break;
+	case NL80211_IFTYPE_P2P_CLIENT:
+		p2p = true;
+		internal_type = NL80211_IFTYPE_STATION;
+		break;
+	case NL80211_IFTYPE_P2P_GO:
+		p2p = true;
+		internal_type = NL80211_IFTYPE_AP;
+		break;
+	default:
+		return -EBUSY;
+	}
+
+	ret = ieee80211_check_concurrent_iface(sdata, internal_type);
+	if (ret)
+		return ret;
+
+	ieee80211_do_stop(sdata, false);
+
+	ieee80211_teardown_sdata(sdata);
+
+	ret = drv_change_interface(local, sdata, internal_type, p2p);
+	if (ret)
+		type = sdata->vif.type;
+
+	/*
+	 * Ignore return value here, there's not much we can do since
+	 * the driver changed the interface type internally already.
+	 * The warnings will hopefully make driver authors fix it :-)
+	 */
+	ieee80211_check_queues(sdata);
+
+	ieee80211_setup_sdata(sdata, type);
+
+	err = ieee80211_do_open(&sdata->wdev, false);
+	WARN(err, "type change: do_open returned %d", err);
+
+	return ret;
+}
+
+int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
+			     enum nl80211_iftype type)
+{
+	int ret;
+
+	ASSERT_RTNL();
+
+	if (type == ieee80211_vif_type_p2p(&sdata->vif))
+		return 0;
+
+	if (ieee80211_sdata_running(sdata)) {
+		ret = ieee80211_runtime_change_iftype(sdata, type);
+		if (ret)
+			return ret;
+	} else {
+		/* Purge and reset type-dependent state. */
+		ieee80211_teardown_sdata(sdata);
+		ieee80211_setup_sdata(sdata, type);
+	}
+
+	/* reset some values that shouldn't be kept across type changes */
+	sdata->drop_unencrypted = 0;
+	if (type == NL80211_IFTYPE_STATION)
+		sdata->u.mgd.use_4addr = false;
+
+	return 0;
+}
+
+static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
+				       u8 *perm_addr, enum nl80211_iftype type)
+{
+	struct ieee80211_sub_if_data *sdata;
+	u64 mask, start, addr, val, inc;
+	u8 *m;
+	u8 tmp_addr[ETH_ALEN];
+	int i;
+
+	/* default ... something at least */
+	memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
+
+	if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
+	    local->hw.wiphy->n_addresses <= 1)
+		return;
+
+	mutex_lock(&local->iflist_mtx);
+
+	switch (type) {
+	case NL80211_IFTYPE_MONITOR:
+		/* doesn't matter */
+		break;
+	case NL80211_IFTYPE_WDS:
+	case NL80211_IFTYPE_AP_VLAN:
+		/* match up with an AP interface */
+		list_for_each_entry(sdata, &local->interfaces, list) {
+			if (sdata->vif.type != NL80211_IFTYPE_AP)
+				continue;
+			memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
+			break;
+		}
+		/* keep default if no AP interface present */
+		break;
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_P2P_GO:
+		if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
+			list_for_each_entry(sdata, &local->interfaces, list) {
+				if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
+					continue;
+				if (!ieee80211_sdata_running(sdata))
+					continue;
+				memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
+				goto out_unlock;
+			}
+		}
+		/* otherwise fall through */
+	default:
+		/* assign a new address if possible -- try n_addresses first */
+		for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
+			bool used = false;
+
+			list_for_each_entry(sdata, &local->interfaces, list) {
+				if (memcmp(local->hw.wiphy->addresses[i].addr,
+					   sdata->vif.addr, ETH_ALEN) == 0) {
+					used = true;
+					break;
+				}
+			}
+
+			if (!used) {
+				memcpy(perm_addr,
+				       local->hw.wiphy->addresses[i].addr,
+				       ETH_ALEN);
+				break;
+			}
+		}
+
+		/* try mask if available */
+		if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
+			break;
+
+		m = local->hw.wiphy->addr_mask;
+		mask =	((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
+			((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
+			((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
+
+		if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
+			/* not a contiguous mask ... not handled now! */
+			pr_info("not contiguous\n");
+			break;
+		}
+
+		/*
+		 * Pick address of existing interface in case user changed
+		 * MAC address manually, default to perm_addr.
+		 */
+		m = local->hw.wiphy->perm_addr;
+		list_for_each_entry(sdata, &local->interfaces, list) {
+			if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
+				continue;
+			m = sdata->vif.addr;
+			break;
+		}
+		start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
+			((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
+			((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
+
+		inc = 1ULL<<__ffs64(mask);
+		val = (start & mask);
+		addr = (start & ~mask) | (val & mask);
+		do {
+			bool used = false;
+
+			tmp_addr[5] = addr >> 0*8;
+			tmp_addr[4] = addr >> 1*8;
+			tmp_addr[3] = addr >> 2*8;
+			tmp_addr[2] = addr >> 3*8;
+			tmp_addr[1] = addr >> 4*8;
+			tmp_addr[0] = addr >> 5*8;
+
+			val += inc;
+
+			list_for_each_entry(sdata, &local->interfaces, list) {
+				if (memcmp(tmp_addr, sdata->vif.addr,
+							ETH_ALEN) == 0) {
+					used = true;
+					break;
+				}
+			}
+
+			if (!used) {
+				memcpy(perm_addr, tmp_addr, ETH_ALEN);
+				break;
+			}
+			addr = (start & ~mask) | (val & mask);
+		} while (addr != start);
+
+		break;
+	}
+
+ out_unlock:
+	mutex_unlock(&local->iflist_mtx);
+}
+
+static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
+
+	ieee80211_cleanup_sdata_stas(sdata);
+}
+
+int ieee80211_if_add(struct ieee80211_local *local, const char *name,
+		     struct wireless_dev **new_wdev, enum nl80211_iftype type,
+		     struct vif_params *params)
+{
+	struct net_device *ndev = NULL;
+	struct ieee80211_sub_if_data *sdata = NULL;
+	int ret, i;
+	int txqs = 1;
+
+	ASSERT_RTNL();
+
+	if (type == NL80211_IFTYPE_P2P_DEVICE) {
+		struct wireless_dev *wdev;
+
+		sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
+				GFP_KERNEL);
+		if (!sdata)
+			return -ENOMEM;
+		wdev = &sdata->wdev;
+
+		sdata->dev = NULL;
+		strlcpy(sdata->name, name, IFNAMSIZ);
+		ieee80211_assign_perm_addr(local, wdev->address, type);
+		memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
+	} else {
+		if (local->hw.queues >= IEEE80211_NUM_ACS)
+			txqs = IEEE80211_NUM_ACS;
+
+		ndev = alloc_netdev_mqs(sizeof(*sdata) +
+					local->hw.vif_data_size,
+					name, ieee80211_if_setup, txqs, 1);
+		if (!ndev)
+			return -ENOMEM;
+		dev_net_set(ndev, wiphy_net(local->hw.wiphy));
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26))
+		ndev->needed_headroom = local->tx_headroom +
+					4*6 /* four MAC addresses */
+					+ 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
+					+ 6 /* mesh */
+					+ 8 /* rfc1042/bridge tunnel */
+					- ETH_HLEN /* ethernet hard_header_len */
+					+ IEEE80211_ENCRYPT_HEADROOM;
+		ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
+#endif
+
+		ret = dev_alloc_name(ndev, ndev->name);
+		if (ret < 0) {
+			free_netdev(ndev);
+			return ret;
+		}
+
+		ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
+		memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
+		SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
+
+		/* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
+		sdata = netdev_priv(ndev);
+		ndev->ieee80211_ptr = &sdata->wdev;
+		memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
+		memcpy(sdata->name, ndev->name, IFNAMSIZ);
+
+		sdata->dev = ndev;
+	}
+
+	/* initialise type-independent data */
+	sdata->wdev.wiphy = local->hw.wiphy;
+	sdata->local = local;
+
+	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
+		skb_queue_head_init(&sdata->fragments[i].skb_list);
+
+	INIT_LIST_HEAD(&sdata->key_list);
+
+	spin_lock_init(&sdata->cleanup_stations_lock);
+	INIT_LIST_HEAD(&sdata->cleanup_stations);
+	INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
+	INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
+			  ieee80211_dfs_cac_timer_work);
+	INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
+			  ieee80211_delayed_tailroom_dec);
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+		struct ieee80211_supported_band *sband;
+		sband = local->hw.wiphy->bands[i];
+		sdata->rc_rateidx_mask[i] =
+			sband ? (1 << sband->n_bitrates) - 1 : 0;
+		if (sband)
+			memcpy(sdata->rc_rateidx_mcs_mask[i],
+			       sband->ht_cap.mcs.rx_mask,
+			       sizeof(sdata->rc_rateidx_mcs_mask[i]));
+		else
+			memset(sdata->rc_rateidx_mcs_mask[i], 0,
+			       sizeof(sdata->rc_rateidx_mcs_mask[i]));
+	}
+
+	ieee80211_set_default_queues(sdata);
+
+	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
+	sdata->user_power_level = local->user_power_level;
+
+	/* setup type-dependent data */
+	ieee80211_setup_sdata(sdata, type);
+
+	if (ndev) {
+		if (params) {
+			ndev->ieee80211_ptr->use_4addr = params->use_4addr;
+			if (type == NL80211_IFTYPE_STATION)
+				sdata->u.mgd.use_4addr = params->use_4addr;
+		}
+
+		ndev->features |= local->hw.netdev_features;
+
+		ret = register_netdevice(ndev);
+		if (ret) {
+			free_netdev(ndev);
+			return ret;
+		}
+	}
+
+	mutex_lock(&local->iflist_mtx);
+	list_add_tail_rcu(&sdata->list, &local->interfaces);
+	mutex_unlock(&local->iflist_mtx);
+
+	if (new_wdev)
+		*new_wdev = &sdata->wdev;
+
+	return 0;
+}
+
+void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
+{
+	ASSERT_RTNL();
+
+	mutex_lock(&sdata->local->iflist_mtx);
+	list_del_rcu(&sdata->list);
+	mutex_unlock(&sdata->local->iflist_mtx);
+
+	synchronize_rcu();
+
+	if (sdata->dev) {
+		unregister_netdevice(sdata->dev);
+	} else {
+		cfg80211_unregister_wdev(&sdata->wdev);
+		kfree(sdata);
+	}
+}
+
+void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
+{
+	if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
+		return;
+	ieee80211_do_stop(sdata, true);
+	ieee80211_teardown_sdata(sdata);
+}
+
+/*
+ * Remove all interfaces, may only be called at hardware unregistration
+ * time because it doesn't do RCU-safe list removals.
+ */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
+void ieee80211_remove_interfaces(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata, *tmp;
+	LIST_HEAD(unreg_list);
+	LIST_HEAD(wdev_list);
+
+	ASSERT_RTNL();
+
+	/*
+	 * Close all AP_VLAN interfaces first, as otherwise they
+	 * might be closed while the AP interface they belong to
+	 * is closed, causing unregister_netdevice_many() to crash.
+	 */
+	list_for_each_entry(sdata, &local->interfaces, list)
+		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+			dev_close(sdata->dev);
+
+	/*
+	 * Close all AP_VLAN interfaces first, as otherwise they
+	 * might be closed while the AP interface they belong to
+	 * is closed, causing unregister_netdevice_many() to crash.
+	 */
+	list_for_each_entry(sdata, &local->interfaces, list)
+		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+			dev_close(sdata->dev);
+
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
+		list_del(&sdata->list);
+
+		if (sdata->dev)
+			unregister_netdevice_queue(sdata->dev, &unreg_list);
+		else
+			list_add(&sdata->list, &wdev_list);
+	}
+	mutex_unlock(&local->iflist_mtx);
+	unregister_netdevice_many(&unreg_list);
+	list_del(&unreg_list);
+
+	list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
+		list_del(&sdata->list);
+		cfg80211_unregister_wdev(&sdata->wdev);
+		kfree(sdata);
+	}
+}
+#else
+void ieee80211_remove_interfaces(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata, *tmp;
+
+	ASSERT_RTNL();
+
+	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
+		mutex_lock(&local->iflist_mtx);
+		list_del(&sdata->list);
+		mutex_unlock(&local->iflist_mtx);
+
+		unregister_netdevice(sdata->dev);
+	}
+}
+#endif
+
+static int netdev_notify(struct notifier_block *nb,
+			 unsigned long state,
+			 void *ndev)
+{
+	struct net_device *dev = ndev;
+	struct ieee80211_sub_if_data *sdata;
+
+	if (state != NETDEV_CHANGENAME)
+		return 0;
+
+	if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
+		return 0;
+
+	if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
+		return 0;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	memcpy(sdata->name, dev->name, IFNAMSIZ);
+
+	ieee80211_debugfs_rename_netdev(sdata);
+	return 0;
+}
+
+static struct notifier_block mac80211_netdev_notifier = {
+	.notifier_call = netdev_notify,
+};
+
+int ieee80211_iface_init(void)
+{
+	return register_netdevice_notifier(&mac80211_netdev_notifier);
+}
+
+void ieee80211_iface_exit(void)
+{
+	unregister_netdevice_notifier(&mac80211_netdev_notifier);
+}
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
new file mode 100644
index 0000000..67059b8
--- /dev/null
+++ b/net/mac80211/key.c
@@ -0,0 +1,753 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007-2008	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/if_ether.h>
+#include <linux/etherdevice.h>
+#include <linux/list.h>
+#include <linux/rcupdate.h>
+#include <linux/rtnetlink.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include <asm/unaligned.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "debugfs_key.h"
+#include "aes_ccm.h"
+#include "aes_cmac.h"
+
+
+/**
+ * DOC: Key handling basics
+ *
+ * Key handling in mac80211 is done based on per-interface (sub_if_data)
+ * keys and per-station keys. Since each station belongs to an interface,
+ * each station key also belongs to that interface.
+ *
+ * Hardware acceleration is done on a best-effort basis for algorithms
+ * that are implemented in software,  for each key the hardware is asked
+ * to enable that key for offloading but if it cannot do that the key is
+ * simply kept for software encryption (unless it is for an algorithm
+ * that isn't implemented in software).
+ * There is currently no way of knowing whether a key is handled in SW
+ * or HW except by looking into debugfs.
+ *
+ * All key management is internally protected by a mutex. Within all
+ * other parts of mac80211, key references are, just as STA structure
+ * references, protected by RCU. Note, however, that some things are
+ * unprotected, namely the key->sta dereferences within the hardware
+ * acceleration functions. This means that sta_info_destroy() must
+ * remove the key which waits for an RCU grace period.
+ */
+
+static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+
+static void assert_key_lock(struct ieee80211_local *local)
+{
+	lockdep_assert_held(&local->key_mtx);
+}
+
+static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata)
+{
+	/*
+	 * When this count is zero, SKB resizing for allocating tailroom
+	 * for IV or MMIC is skipped. But, this check has created two race
+	 * cases in xmit path while transiting from zero count to one:
+	 *
+	 * 1. SKB resize was skipped because no key was added but just before
+	 * the xmit key is added and SW encryption kicks off.
+	 *
+	 * 2. SKB resize was skipped because all the keys were hw planted but
+	 * just before xmit one of the key is deleted and SW encryption kicks
+	 * off.
+	 *
+	 * In both the above case SW encryption will find not enough space for
+	 * tailroom and exits with WARN_ON. (See WARN_ONs at wpa.c)
+	 *
+	 * Solution has been explained at
+	 * http://mid.gmane.org/1308590980.4322.19.camel@jlt3.sipsolutions.net
+	 */
+
+	if (!sdata->crypto_tx_tailroom_needed_cnt++) {
+		/*
+		 * Flush all XMIT packets currently using HW encryption or no
+		 * encryption at all if the count transition is from 0 -> 1.
+		 */
+		synchronize_net();
+	}
+}
+
+static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+	int ret;
+
+	might_sleep();
+
+	if (!key->local->ops->set_key)
+		goto out_unsupported;
+
+	assert_key_lock(key->local);
+
+	sta = key->sta;
+
+	/*
+	 * If this is a per-STA GTK, check if it
+	 * is supported; if not, return.
+	 */
+	if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) &&
+	    !(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK))
+		goto out_unsupported;
+
+	if (sta && !sta->uploaded)
+		goto out_unsupported;
+
+	sdata = key->sdata;
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		/*
+		 * The driver doesn't know anything about VLAN interfaces.
+		 * Hence, don't send GTKs for VLAN interfaces to the driver.
+		 */
+		if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE))
+			goto out_unsupported;
+	}
+
+	ret = drv_set_key(key->local, SET_KEY, sdata,
+			  sta ? &sta->sta : NULL, &key->conf);
+
+	if (!ret) {
+		key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
+
+		if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
+		      (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+		      (key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
+			sdata->crypto_tx_tailroom_needed_cnt--;
+
+		WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
+			(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV));
+
+		return 0;
+	}
+
+	if (ret != -ENOSPC && ret != -EOPNOTSUPP)
+		sdata_err(sdata,
+			  "failed to set key (%d, %pM) to hardware (%d)\n",
+			  key->conf.keyidx,
+			  sta ? sta->sta.addr : bcast_addr, ret);
+
+ out_unsupported:
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+	case WLAN_CIPHER_SUITE_TKIP:
+	case WLAN_CIPHER_SUITE_CCMP:
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		/* all of these we can do in software */
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+	int ret;
+
+	might_sleep();
+
+	if (!key || !key->local->ops->set_key)
+		return;
+
+	assert_key_lock(key->local);
+
+	if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
+		return;
+
+	sta = key->sta;
+	sdata = key->sdata;
+
+	if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
+	      (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+	      (key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
+		increment_tailroom_need_count(sdata);
+
+	ret = drv_set_key(key->local, DISABLE_KEY, sdata,
+			  sta ? &sta->sta : NULL, &key->conf);
+
+	if (ret)
+		sdata_err(sdata,
+			  "failed to remove key (%d, %pM) from hardware (%d)\n",
+			  key->conf.keyidx,
+			  sta ? sta->sta.addr : bcast_addr, ret);
+
+	key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
+}
+
+static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata,
+					int idx, bool uni, bool multi)
+{
+	struct ieee80211_key *key = NULL;
+
+	assert_key_lock(sdata->local);
+
+	if (idx >= 0 && idx < NUM_DEFAULT_KEYS)
+		key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
+
+	if (uni) {
+		rcu_assign_pointer(sdata->default_unicast_key, key);
+		drv_set_default_unicast_key(sdata->local, sdata, idx);
+	}
+
+	if (multi)
+		rcu_assign_pointer(sdata->default_multicast_key, key);
+
+	ieee80211_debugfs_key_update_default(sdata);
+}
+
+void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
+			       bool uni, bool multi)
+{
+	mutex_lock(&sdata->local->key_mtx);
+	__ieee80211_set_default_key(sdata, idx, uni, multi);
+	mutex_unlock(&sdata->local->key_mtx);
+}
+
+static void
+__ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx)
+{
+	struct ieee80211_key *key = NULL;
+
+	assert_key_lock(sdata->local);
+
+	if (idx >= NUM_DEFAULT_KEYS &&
+	    idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
+		key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
+
+	rcu_assign_pointer(sdata->default_mgmt_key, key);
+
+	ieee80211_debugfs_key_update_default(sdata);
+}
+
+void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
+				    int idx)
+{
+	mutex_lock(&sdata->local->key_mtx);
+	__ieee80211_set_default_mgmt_key(sdata, idx);
+	mutex_unlock(&sdata->local->key_mtx);
+}
+
+
+static void ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
+				  struct sta_info *sta,
+				  bool pairwise,
+				  struct ieee80211_key *old,
+				  struct ieee80211_key *new)
+{
+	int idx;
+	bool defunikey, defmultikey, defmgmtkey;
+
+	if (new)
+		list_add_tail(&new->list, &sdata->key_list);
+
+	if (sta && pairwise) {
+		rcu_assign_pointer(sta->ptk, new);
+	} else if (sta) {
+		if (old)
+			idx = old->conf.keyidx;
+		else
+			idx = new->conf.keyidx;
+		rcu_assign_pointer(sta->gtk[idx], new);
+	} else {
+		WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx);
+
+		if (old)
+			idx = old->conf.keyidx;
+		else
+			idx = new->conf.keyidx;
+
+		defunikey = old &&
+			old == key_mtx_dereference(sdata->local,
+						sdata->default_unicast_key);
+		defmultikey = old &&
+			old == key_mtx_dereference(sdata->local,
+						sdata->default_multicast_key);
+		defmgmtkey = old &&
+			old == key_mtx_dereference(sdata->local,
+						sdata->default_mgmt_key);
+
+		if (defunikey && !new)
+			__ieee80211_set_default_key(sdata, -1, true, false);
+		if (defmultikey && !new)
+			__ieee80211_set_default_key(sdata, -1, false, true);
+		if (defmgmtkey && !new)
+			__ieee80211_set_default_mgmt_key(sdata, -1);
+
+		rcu_assign_pointer(sdata->keys[idx], new);
+		if (defunikey && new)
+			__ieee80211_set_default_key(sdata, new->conf.keyidx,
+						    true, false);
+		if (defmultikey && new)
+			__ieee80211_set_default_key(sdata, new->conf.keyidx,
+						    false, true);
+		if (defmgmtkey && new)
+			__ieee80211_set_default_mgmt_key(sdata,
+							 new->conf.keyidx);
+	}
+
+	if (old)
+		list_del(&old->list);
+}
+
+struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
+					  const u8 *key_data,
+					  size_t seq_len, const u8 *seq)
+{
+	struct ieee80211_key *key;
+	int i, j, err;
+
+	BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS);
+
+	key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
+	if (!key)
+		return ERR_PTR(-ENOMEM);
+
+	/*
+	 * Default to software encryption; we'll later upload the
+	 * key to the hardware if possible.
+	 */
+	key->conf.flags = 0;
+	key->flags = 0;
+
+	key->conf.cipher = cipher;
+	key->conf.keyidx = idx;
+	key->conf.keylen = key_len;
+	switch (cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		key->conf.iv_len = WEP_IV_LEN;
+		key->conf.icv_len = WEP_ICV_LEN;
+		break;
+	case WLAN_CIPHER_SUITE_TKIP:
+		key->conf.iv_len = TKIP_IV_LEN;
+		key->conf.icv_len = TKIP_ICV_LEN;
+		if (seq) {
+			for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
+				key->u.tkip.rx[i].iv32 =
+					get_unaligned_le32(&seq[2]);
+				key->u.tkip.rx[i].iv16 =
+					get_unaligned_le16(seq);
+			}
+		}
+		spin_lock_init(&key->u.tkip.txlock);
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		key->conf.iv_len = CCMP_HDR_LEN;
+		key->conf.icv_len = CCMP_MIC_LEN;
+		if (seq) {
+			for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
+				for (j = 0; j < CCMP_PN_LEN; j++)
+					key->u.ccmp.rx_pn[i][j] =
+						seq[CCMP_PN_LEN - j - 1];
+		}
+		/*
+		 * Initialize AES key state here as an optimization so that
+		 * it does not need to be initialized for every packet.
+		 */
+		key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data);
+		if (IS_ERR(key->u.ccmp.tfm)) {
+			err = PTR_ERR(key->u.ccmp.tfm);
+			kfree(key);
+			return ERR_PTR(err);
+		}
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		key->conf.iv_len = 0;
+		key->conf.icv_len = sizeof(struct ieee80211_mmie);
+		if (seq)
+			for (j = 0; j < CMAC_PN_LEN; j++)
+				key->u.aes_cmac.rx_pn[j] =
+					seq[CMAC_PN_LEN - j - 1];
+		/*
+		 * Initialize AES key state here as an optimization so that
+		 * it does not need to be initialized for every packet.
+		 */
+		key->u.aes_cmac.tfm =
+			ieee80211_aes_cmac_key_setup(key_data);
+		if (IS_ERR(key->u.aes_cmac.tfm)) {
+			err = PTR_ERR(key->u.aes_cmac.tfm);
+			kfree(key);
+			return ERR_PTR(err);
+		}
+		break;
+	}
+	memcpy(key->conf.key, key_data, key_len);
+	INIT_LIST_HEAD(&key->list);
+
+	return key;
+}
+
+static void ieee80211_key_free_common(struct ieee80211_key *key)
+{
+	if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP)
+		ieee80211_aes_key_free(key->u.ccmp.tfm);
+	if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC)
+		ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm);
+	kfree(key);
+}
+
+static void __ieee80211_key_destroy(struct ieee80211_key *key,
+				    bool delay_tailroom)
+{
+	if (key->local)
+		ieee80211_key_disable_hw_accel(key);
+
+	if (key->local) {
+		struct ieee80211_sub_if_data *sdata = key->sdata;
+
+		ieee80211_debugfs_key_remove(key);
+
+		if (delay_tailroom) {
+			/* see ieee80211_delayed_tailroom_dec */
+			sdata->crypto_tx_tailroom_pending_dec++;
+			schedule_delayed_work(&sdata->dec_tailroom_needed_wk,
+					      HZ/2);
+		} else {
+			sdata->crypto_tx_tailroom_needed_cnt--;
+		}
+	}
+
+	ieee80211_key_free_common(key);
+}
+
+static void ieee80211_key_destroy(struct ieee80211_key *key,
+				  bool delay_tailroom)
+{
+	if (!key)
+		return;
+
+	/*
+	 * Synchronize so the TX path can no longer be using
+	 * this key before we free/remove it.
+	 */
+	synchronize_net();
+
+	__ieee80211_key_destroy(key, delay_tailroom);
+}
+
+void ieee80211_key_free_unused(struct ieee80211_key *key)
+{
+	WARN_ON(key->sdata || key->local);
+	ieee80211_key_free_common(key);
+}
+
+int ieee80211_key_link(struct ieee80211_key *key,
+		       struct ieee80211_sub_if_data *sdata,
+		       struct sta_info *sta)
+{
+	struct ieee80211_key *old_key;
+	int idx, ret;
+	bool pairwise;
+
+	BUG_ON(!sdata);
+	BUG_ON(!key);
+
+	pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE;
+	idx = key->conf.keyidx;
+	key->local = sdata->local;
+	key->sdata = sdata;
+	key->sta = sta;
+
+	mutex_lock(&sdata->local->key_mtx);
+
+	if (sta && pairwise)
+		old_key = key_mtx_dereference(sdata->local, sta->ptk);
+	else if (sta)
+		old_key = key_mtx_dereference(sdata->local, sta->gtk[idx]);
+	else
+		old_key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
+
+	increment_tailroom_need_count(sdata);
+
+	ieee80211_key_replace(sdata, sta, pairwise, old_key, key);
+	ieee80211_key_destroy(old_key, true);
+
+	ieee80211_debugfs_key_add(key);
+
+	ret = ieee80211_key_enable_hw_accel(key);
+
+	if (ret)
+		ieee80211_key_free(key, true);
+
+	mutex_unlock(&sdata->local->key_mtx);
+
+	return ret;
+}
+
+void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom)
+{
+	if (!key)
+		return;
+
+	/*
+	 * Replace key with nothingness if it was ever used.
+	 */
+	if (key->sdata)
+		ieee80211_key_replace(key->sdata, key->sta,
+				key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
+				key, NULL);
+	ieee80211_key_destroy(key, delay_tailroom);
+}
+
+void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_key *key;
+
+	ASSERT_RTNL();
+
+	if (WARN_ON(!ieee80211_sdata_running(sdata)))
+		return;
+
+	mutex_lock(&sdata->local->key_mtx);
+
+	sdata->crypto_tx_tailroom_needed_cnt = 0;
+
+	list_for_each_entry(key, &sdata->key_list, list) {
+		increment_tailroom_need_count(sdata);
+		ieee80211_key_enable_hw_accel(key);
+	}
+
+	mutex_unlock(&sdata->local->key_mtx);
+}
+
+void ieee80211_iter_keys(struct ieee80211_hw *hw,
+			 struct ieee80211_vif *vif,
+			 void (*iter)(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif,
+				      struct ieee80211_sta *sta,
+				      struct ieee80211_key_conf *key,
+				      void *data),
+			 void *iter_data)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_key *key;
+	struct ieee80211_sub_if_data *sdata;
+
+	ASSERT_RTNL();
+
+	mutex_lock(&local->key_mtx);
+	if (vif) {
+		sdata = vif_to_sdata(vif);
+		list_for_each_entry(key, &sdata->key_list, list)
+			iter(hw, &sdata->vif,
+			     key->sta ? &key->sta->sta : NULL,
+			     &key->conf, iter_data);
+	} else {
+		list_for_each_entry(sdata, &local->interfaces, list)
+			list_for_each_entry(key, &sdata->key_list, list)
+				iter(hw, &sdata->vif,
+				     key->sta ? &key->sta->sta : NULL,
+				     &key->conf, iter_data);
+	}
+	mutex_unlock(&local->key_mtx);
+}
+EXPORT_SYMBOL(ieee80211_iter_keys);
+
+void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_key *key, *tmp;
+	LIST_HEAD(keys);
+
+	cancel_delayed_work_sync(&sdata->dec_tailroom_needed_wk);
+
+	mutex_lock(&sdata->local->key_mtx);
+
+	sdata->crypto_tx_tailroom_needed_cnt -=
+		sdata->crypto_tx_tailroom_pending_dec;
+	sdata->crypto_tx_tailroom_pending_dec = 0;
+
+	ieee80211_debugfs_key_remove_mgmt_default(sdata);
+
+	list_for_each_entry_safe(key, tmp, &sdata->key_list, list) {
+		ieee80211_key_replace(key->sdata, key->sta,
+				key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
+				key, NULL);
+		list_add_tail(&key->list, &keys);
+	}
+
+	ieee80211_debugfs_key_update_default(sdata);
+
+	if (!list_empty(&keys)) {
+		synchronize_net();
+		list_for_each_entry_safe(key, tmp, &keys, list)
+			__ieee80211_key_destroy(key, false);
+	}
+
+	WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt ||
+		     sdata->crypto_tx_tailroom_pending_dec);
+
+	mutex_unlock(&sdata->local->key_mtx);
+}
+
+void ieee80211_free_sta_keys(struct ieee80211_local *local,
+			     struct sta_info *sta)
+{
+	struct ieee80211_key *key, *tmp;
+	LIST_HEAD(keys);
+	int i;
+
+	mutex_lock(&local->key_mtx);
+	for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
+		key = key_mtx_dereference(local, sta->gtk[i]);
+		if (!key)
+			continue;
+		ieee80211_key_replace(key->sdata, key->sta,
+				key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
+				key, NULL);
+		list_add(&key->list, &keys);
+	}
+
+	key = key_mtx_dereference(local, sta->ptk);
+	if (key) {
+		ieee80211_key_replace(key->sdata, key->sta,
+				key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE,
+				key, NULL);
+		list_add(&key->list, &keys);
+	}
+
+	/*
+	 * NB: the station code relies on this being
+	 * done even if there aren't any keys
+	 */
+	synchronize_net();
+
+	list_for_each_entry_safe(key, tmp, &keys, list)
+		__ieee80211_key_destroy(key, true);
+
+	mutex_unlock(&local->key_mtx);
+}
+
+void ieee80211_delayed_tailroom_dec(struct work_struct *wk)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	sdata = container_of(wk, struct ieee80211_sub_if_data,
+			     dec_tailroom_needed_wk.work);
+
+	/*
+	 * The reason for the delayed tailroom needed decrementing is to
+	 * make roaming faster: during roaming, all keys are first deleted
+	 * and then new keys are installed. The first new key causes the
+	 * crypto_tx_tailroom_needed_cnt to go from 0 to 1, which invokes
+	 * the cost of synchronize_net() (which can be slow). Avoid this
+	 * by deferring the crypto_tx_tailroom_needed_cnt decrementing on
+	 * key removal for a while, so if we roam the value is larger than
+	 * zero and no 0->1 transition happens.
+	 *
+	 * The cost is that if the AP switching was from an AP with keys
+	 * to one without, we still allocate tailroom while it would no
+	 * longer be needed. However, in the typical (fast) roaming case
+	 * within an ESS this usually won't happen.
+	 */
+
+	mutex_lock(&sdata->local->key_mtx);
+	sdata->crypto_tx_tailroom_needed_cnt -=
+		sdata->crypto_tx_tailroom_pending_dec;
+	sdata->crypto_tx_tailroom_pending_dec = 0;
+	mutex_unlock(&sdata->local->key_mtx);
+}
+
+void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
+				const u8 *replay_ctr, gfp_t gfp)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr);
+
+	cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp);
+}
+EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify);
+
+void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf,
+			      struct ieee80211_key_seq *seq)
+{
+	struct ieee80211_key *key;
+	u64 pn64;
+
+	if (WARN_ON(!(keyconf->flags & IEEE80211_KEY_FLAG_GENERATE_IV)))
+		return;
+
+	key = container_of(keyconf, struct ieee80211_key, conf);
+
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_TKIP:
+		seq->tkip.iv32 = key->u.tkip.tx.iv32;
+		seq->tkip.iv16 = key->u.tkip.tx.iv16;
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		pn64 = atomic64_read(&key->u.ccmp.tx_pn);
+		seq->ccmp.pn[5] = pn64;
+		seq->ccmp.pn[4] = pn64 >> 8;
+		seq->ccmp.pn[3] = pn64 >> 16;
+		seq->ccmp.pn[2] = pn64 >> 24;
+		seq->ccmp.pn[1] = pn64 >> 32;
+		seq->ccmp.pn[0] = pn64 >> 40;
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		pn64 = atomic64_read(&key->u.aes_cmac.tx_pn);
+		seq->ccmp.pn[5] = pn64;
+		seq->ccmp.pn[4] = pn64 >> 8;
+		seq->ccmp.pn[3] = pn64 >> 16;
+		seq->ccmp.pn[2] = pn64 >> 24;
+		seq->ccmp.pn[1] = pn64 >> 32;
+		seq->ccmp.pn[0] = pn64 >> 40;
+		break;
+	default:
+		WARN_ON(1);
+	}
+}
+EXPORT_SYMBOL(ieee80211_get_key_tx_seq);
+
+void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf,
+			      int tid, struct ieee80211_key_seq *seq)
+{
+	struct ieee80211_key *key;
+	const u8 *pn;
+
+	key = container_of(keyconf, struct ieee80211_key, conf);
+
+	switch (key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_TKIP:
+		if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS))
+			return;
+		seq->tkip.iv32 = key->u.tkip.rx[tid].iv32;
+		seq->tkip.iv16 = key->u.tkip.rx[tid].iv16;
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS))
+			return;
+		if (tid < 0)
+			pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS];
+		else
+			pn = key->u.ccmp.rx_pn[tid];
+		memcpy(seq->ccmp.pn, pn, CCMP_PN_LEN);
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		if (WARN_ON(tid != 0))
+			return;
+		pn = key->u.aes_cmac.rx_pn;
+		memcpy(seq->aes_cmac.pn, pn, CMAC_PN_LEN);
+		break;
+	}
+}
+EXPORT_SYMBOL(ieee80211_get_key_rx_seq);
diff --git a/net/mac80211/key.h b/net/mac80211/key.h
new file mode 100644
index 0000000..b325757
--- /dev/null
+++ b/net/mac80211/key.h
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2002-2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef IEEE80211_KEY_H
+#define IEEE80211_KEY_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/crypto.h>
+#include <linux/rcupdate.h>
+#include <net/mac80211.h>
+
+#define NUM_DEFAULT_KEYS 4
+#define NUM_DEFAULT_MGMT_KEYS 2
+
+#define WEP_IV_LEN		4
+#define WEP_ICV_LEN		4
+#define ALG_CCMP_KEY_LEN	16
+#define CCMP_HDR_LEN		8
+#define CCMP_MIC_LEN		8
+#define CCMP_TK_LEN		16
+#define CCMP_PN_LEN		6
+#define TKIP_IV_LEN		8
+#define TKIP_ICV_LEN		4
+#define CMAC_PN_LEN		6
+
+struct ieee80211_local;
+struct ieee80211_sub_if_data;
+struct sta_info;
+
+/**
+ * enum ieee80211_internal_key_flags - internal key flags
+ *
+ * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
+ *	in the hardware for TX crypto hardware acceleration.
+ * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped.
+ */
+enum ieee80211_internal_key_flags {
+	KEY_FLAG_UPLOADED_TO_HARDWARE	= BIT(0),
+	KEY_FLAG_TAINTED		= BIT(1),
+};
+
+enum ieee80211_internal_tkip_state {
+	TKIP_STATE_NOT_INIT,
+	TKIP_STATE_PHASE1_DONE,
+	TKIP_STATE_PHASE1_HW_UPLOADED,
+};
+
+struct tkip_ctx {
+	u32 iv32;	/* current iv32 */
+	u16 iv16;	/* current iv16 */
+	u16 p1k[5];	/* p1k cache */
+	u32 p1k_iv32;	/* iv32 for which p1k computed */
+	enum ieee80211_internal_tkip_state state;
+};
+
+struct ieee80211_key {
+	struct ieee80211_local *local;
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+
+	/* for sdata list */
+	struct list_head list;
+
+	/* protected by key mutex */
+	unsigned int flags;
+
+	union {
+		struct {
+			/* protects tx context */
+			spinlock_t txlock;
+
+			/* last used TSC */
+			struct tkip_ctx tx;
+
+			/* last received RSC */
+			struct tkip_ctx rx[IEEE80211_NUM_TIDS];
+
+			/* number of mic failures */
+			u32 mic_failures;
+		} tkip;
+		struct {
+			atomic64_t tx_pn;
+			/*
+			 * Last received packet number. The first
+			 * IEEE80211_NUM_TIDS counters are used with Data
+			 * frames and the last counter is used with Robust
+			 * Management frames.
+			 */
+			u8 rx_pn[IEEE80211_NUM_TIDS + 1][CCMP_PN_LEN];
+			struct crypto_cipher *tfm;
+			u32 replays; /* dot11RSNAStatsCCMPReplays */
+		} ccmp;
+		struct {
+			atomic64_t tx_pn;
+			u8 rx_pn[CMAC_PN_LEN];
+			struct crypto_cipher *tfm;
+			u32 replays; /* dot11RSNAStatsCMACReplays */
+			u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
+		} aes_cmac;
+	} u;
+
+	/* number of times this key has been used */
+	int tx_rx_count;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct {
+		struct dentry *stalink;
+		struct dentry *dir;
+		int cnt;
+	} debugfs;
+#endif
+
+	/*
+	 * key config, must be last because it contains key
+	 * material as variable length member
+	 */
+	struct ieee80211_key_conf conf;
+};
+
+struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
+					  const u8 *key_data,
+					  size_t seq_len, const u8 *seq);
+/*
+ * Insert a key into data structures (sdata, sta if necessary)
+ * to make it used, free old key. On failure, also free the new key.
+ */
+int ieee80211_key_link(struct ieee80211_key *key,
+		       struct ieee80211_sub_if_data *sdata,
+		       struct sta_info *sta);
+void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom);
+void ieee80211_key_free_unused(struct ieee80211_key *key);
+void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
+			       bool uni, bool multi);
+void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
+				    int idx);
+void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
+void ieee80211_free_sta_keys(struct ieee80211_local *local,
+			     struct sta_info *sta);
+void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
+
+#define key_mtx_dereference(local, ref) \
+	rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
+
+void ieee80211_delayed_tailroom_dec(struct work_struct *wk);
+
+#endif /* IEEE80211_KEY_H */
diff --git a/net/mac80211/led.c b/net/mac80211/led.c
new file mode 100644
index 0000000..bcffa69
--- /dev/null
+++ b/net/mac80211/led.c
@@ -0,0 +1,309 @@
+/*
+ * Copyright 2006, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/* just for IFNAMSIZ */
+#include <linux/if.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include "led.h"
+
+void ieee80211_led_rx(struct ieee80211_local *local)
+{
+	if (unlikely(!local->rx_led))
+		return;
+	if (local->rx_led_counter++ % 2 == 0)
+		led_trigger_event(local->rx_led, LED_OFF);
+	else
+		led_trigger_event(local->rx_led, LED_FULL);
+}
+
+/* q is 1 if a packet was enqueued, 0 if it has been transmitted */
+void ieee80211_led_tx(struct ieee80211_local *local, int q)
+{
+	if (unlikely(!local->tx_led))
+		return;
+	/* not sure how this is supposed to work ... */
+	local->tx_led_counter += 2*q-1;
+	if (local->tx_led_counter % 2 == 0)
+		led_trigger_event(local->tx_led, LED_OFF);
+	else
+		led_trigger_event(local->tx_led, LED_FULL);
+}
+
+void ieee80211_led_assoc(struct ieee80211_local *local, bool associated)
+{
+	if (unlikely(!local->assoc_led))
+		return;
+	if (associated)
+		led_trigger_event(local->assoc_led, LED_FULL);
+	else
+		led_trigger_event(local->assoc_led, LED_OFF);
+}
+
+void ieee80211_led_radio(struct ieee80211_local *local, bool enabled)
+{
+	if (unlikely(!local->radio_led))
+		return;
+	if (enabled)
+		led_trigger_event(local->radio_led, LED_FULL);
+	else
+		led_trigger_event(local->radio_led, LED_OFF);
+}
+
+void ieee80211_led_names(struct ieee80211_local *local)
+{
+	snprintf(local->rx_led_name, sizeof(local->rx_led_name),
+		 "%srx", wiphy_name(local->hw.wiphy));
+	snprintf(local->tx_led_name, sizeof(local->tx_led_name),
+		 "%stx", wiphy_name(local->hw.wiphy));
+	snprintf(local->assoc_led_name, sizeof(local->assoc_led_name),
+		 "%sassoc", wiphy_name(local->hw.wiphy));
+	snprintf(local->radio_led_name, sizeof(local->radio_led_name),
+		 "%sradio", wiphy_name(local->hw.wiphy));
+}
+
+void ieee80211_led_init(struct ieee80211_local *local)
+{
+	local->rx_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
+	if (local->rx_led) {
+		local->rx_led->name = local->rx_led_name;
+		if (led_trigger_register(local->rx_led)) {
+			kfree(local->rx_led);
+			local->rx_led = NULL;
+		}
+	}
+
+	local->tx_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
+	if (local->tx_led) {
+		local->tx_led->name = local->tx_led_name;
+		if (led_trigger_register(local->tx_led)) {
+			kfree(local->tx_led);
+			local->tx_led = NULL;
+		}
+	}
+
+	local->assoc_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
+	if (local->assoc_led) {
+		local->assoc_led->name = local->assoc_led_name;
+		if (led_trigger_register(local->assoc_led)) {
+			kfree(local->assoc_led);
+			local->assoc_led = NULL;
+		}
+	}
+
+	local->radio_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
+	if (local->radio_led) {
+		local->radio_led->name = local->radio_led_name;
+		if (led_trigger_register(local->radio_led)) {
+			kfree(local->radio_led);
+			local->radio_led = NULL;
+		}
+	}
+
+	if (local->tpt_led_trigger) {
+		if (led_trigger_register(&local->tpt_led_trigger->trig)) {
+			kfree(local->tpt_led_trigger);
+			local->tpt_led_trigger = NULL;
+		}
+	}
+}
+
+void ieee80211_led_exit(struct ieee80211_local *local)
+{
+	if (local->radio_led) {
+		led_trigger_unregister(local->radio_led);
+		kfree(local->radio_led);
+	}
+	if (local->assoc_led) {
+		led_trigger_unregister(local->assoc_led);
+		kfree(local->assoc_led);
+	}
+	if (local->tx_led) {
+		led_trigger_unregister(local->tx_led);
+		kfree(local->tx_led);
+	}
+	if (local->rx_led) {
+		led_trigger_unregister(local->rx_led);
+		kfree(local->rx_led);
+	}
+
+	if (local->tpt_led_trigger) {
+		led_trigger_unregister(&local->tpt_led_trigger->trig);
+		kfree(local->tpt_led_trigger);
+	}
+}
+
+char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	return local->radio_led_name;
+}
+EXPORT_SYMBOL(__ieee80211_get_radio_led_name);
+
+char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	return local->assoc_led_name;
+}
+EXPORT_SYMBOL(__ieee80211_get_assoc_led_name);
+
+char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	return local->tx_led_name;
+}
+EXPORT_SYMBOL(__ieee80211_get_tx_led_name);
+
+char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	return local->rx_led_name;
+}
+EXPORT_SYMBOL(__ieee80211_get_rx_led_name);
+
+static unsigned long tpt_trig_traffic(struct ieee80211_local *local,
+				      struct tpt_led_trigger *tpt_trig)
+{
+	unsigned long traffic, delta;
+
+	traffic = tpt_trig->tx_bytes + tpt_trig->rx_bytes;
+
+	delta = traffic - tpt_trig->prev_traffic;
+	tpt_trig->prev_traffic = traffic;
+	return DIV_ROUND_UP(delta, 1024 / 8);
+}
+
+static void tpt_trig_timer(unsigned long data)
+{
+	struct ieee80211_local *local = (void *)data;
+	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+	struct led_classdev *led_cdev;
+	unsigned long on, off, tpt;
+	int i;
+
+	if (!tpt_trig->running)
+		return;
+
+	mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
+
+	tpt = tpt_trig_traffic(local, tpt_trig);
+
+	/* default to just solid on */
+	on = 1;
+	off = 0;
+
+	for (i = tpt_trig->blink_table_len - 1; i >= 0; i--) {
+		if (tpt_trig->blink_table[i].throughput < 0 ||
+		    tpt > tpt_trig->blink_table[i].throughput) {
+			off = tpt_trig->blink_table[i].blink_time / 2;
+			on = tpt_trig->blink_table[i].blink_time - off;
+			break;
+		}
+	}
+
+	read_lock(&tpt_trig->trig.leddev_list_lock);
+	list_for_each_entry(led_cdev, &tpt_trig->trig.led_cdevs, trig_list)
+		led_blink_set(led_cdev, &on, &off);
+	read_unlock(&tpt_trig->trig.leddev_list_lock);
+}
+
+char *__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
+				unsigned int flags,
+				const struct ieee80211_tpt_blink *blink_table,
+				unsigned int blink_table_len)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct tpt_led_trigger *tpt_trig;
+
+	if (WARN_ON(local->tpt_led_trigger))
+		return NULL;
+
+	tpt_trig = kzalloc(sizeof(struct tpt_led_trigger), GFP_KERNEL);
+	if (!tpt_trig)
+		return NULL;
+
+	snprintf(tpt_trig->name, sizeof(tpt_trig->name),
+		 "%stpt", wiphy_name(local->hw.wiphy));
+
+	tpt_trig->trig.name = tpt_trig->name;
+
+	tpt_trig->blink_table = blink_table;
+	tpt_trig->blink_table_len = blink_table_len;
+	tpt_trig->want = flags;
+
+	setup_timer(&tpt_trig->timer, tpt_trig_timer, (unsigned long)local);
+
+	local->tpt_led_trigger = tpt_trig;
+
+	return tpt_trig->name;
+}
+EXPORT_SYMBOL(__ieee80211_create_tpt_led_trigger);
+
+static void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
+{
+	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+
+	if (tpt_trig->running)
+		return;
+
+	/* reset traffic */
+	tpt_trig_traffic(local, tpt_trig);
+	tpt_trig->running = true;
+
+	tpt_trig_timer((unsigned long)local);
+	mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
+}
+
+static void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
+{
+	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+	struct led_classdev *led_cdev;
+
+	if (!tpt_trig->running)
+		return;
+
+	tpt_trig->running = false;
+	del_timer_sync(&tpt_trig->timer);
+
+	read_lock(&tpt_trig->trig.leddev_list_lock);
+	list_for_each_entry(led_cdev, &tpt_trig->trig.led_cdevs, trig_list)
+		led_set_brightness(led_cdev, LED_OFF);
+	read_unlock(&tpt_trig->trig.leddev_list_lock);
+}
+
+void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
+				unsigned int types_on, unsigned int types_off)
+{
+	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+	bool allowed;
+
+	WARN_ON(types_on & types_off);
+
+	if (!tpt_trig)
+		return;
+
+	tpt_trig->active &= ~types_off;
+	tpt_trig->active |= types_on;
+
+	/*
+	 * Regardless of wanted state, we shouldn't blink when
+	 * the radio is disabled -- this can happen due to some
+	 * code ordering issues with __ieee80211_recalc_idle()
+	 * being called before the radio is started.
+	 */
+	allowed = tpt_trig->active & IEEE80211_TPT_LEDTRIG_FL_RADIO;
+
+	if (!allowed || !(tpt_trig->active & tpt_trig->want))
+		ieee80211_stop_tpt_led_trig(local);
+	else
+		ieee80211_start_tpt_led_trig(local);
+}
diff --git a/net/mac80211/led.h b/net/mac80211/led.h
new file mode 100644
index 0000000..f56932b
--- /dev/null
+++ b/net/mac80211/led.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2006, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/leds.h>
+#include "ieee80211_i.h"
+
+#ifdef CPTCFG_MAC80211_LEDS
+void ieee80211_led_rx(struct ieee80211_local *local);
+void ieee80211_led_tx(struct ieee80211_local *local, int q);
+void ieee80211_led_assoc(struct ieee80211_local *local,
+			 bool associated);
+void ieee80211_led_radio(struct ieee80211_local *local,
+			 bool enabled);
+void ieee80211_led_names(struct ieee80211_local *local);
+void ieee80211_led_init(struct ieee80211_local *local);
+void ieee80211_led_exit(struct ieee80211_local *local);
+void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
+				unsigned int types_on, unsigned int types_off);
+#else
+static inline void ieee80211_led_rx(struct ieee80211_local *local)
+{
+}
+static inline void ieee80211_led_tx(struct ieee80211_local *local, int q)
+{
+}
+static inline void ieee80211_led_assoc(struct ieee80211_local *local,
+				       bool associated)
+{
+}
+static inline void ieee80211_led_radio(struct ieee80211_local *local,
+				       bool enabled)
+{
+}
+static inline void ieee80211_led_names(struct ieee80211_local *local)
+{
+}
+static inline void ieee80211_led_init(struct ieee80211_local *local)
+{
+}
+static inline void ieee80211_led_exit(struct ieee80211_local *local)
+{
+}
+static inline void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
+					      unsigned int types_on,
+					      unsigned int types_off)
+{
+}
+#endif
+
+static inline void
+ieee80211_tpt_led_trig_tx(struct ieee80211_local *local, __le16 fc, int bytes)
+{
+#ifdef CPTCFG_MAC80211_LEDS
+	if (local->tpt_led_trigger && ieee80211_is_data(fc))
+		local->tpt_led_trigger->tx_bytes += bytes;
+#endif
+}
+
+static inline void
+ieee80211_tpt_led_trig_rx(struct ieee80211_local *local, __le16 fc, int bytes)
+{
+#ifdef CPTCFG_MAC80211_LEDS
+	if (local->tpt_led_trigger && ieee80211_is_data(fc))
+		local->tpt_led_trigger->rx_bytes += bytes;
+#endif
+}
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
new file mode 100644
index 0000000..d9c7c0b
--- /dev/null
+++ b/net/mac80211/main.c
@@ -0,0 +1,1171 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/mac80211.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/rtnetlink.h>
+#include <linux/bitmap.h>
+#include <linux/pm_qos.h>
+#include <linux/inetdevice.h>
+#include <net/net_namespace.h>
+#include <net/cfg80211.h>
+#include <net/addrconf.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "mesh.h"
+#include "wep.h"
+#include "led.h"
+#include "cfg.h"
+#include "debugfs.h"
+
+void ieee80211_configure_filter(struct ieee80211_local *local)
+{
+	u64 mc;
+	unsigned int changed_flags;
+	unsigned int new_flags = 0;
+
+	if (atomic_read(&local->iff_promiscs))
+		new_flags |= FIF_PROMISC_IN_BSS;
+
+	if (atomic_read(&local->iff_allmultis))
+		new_flags |= FIF_ALLMULTI;
+
+	if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+	    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
+		new_flags |= FIF_BCN_PRBRESP_PROMISC;
+
+	if (local->fif_probe_req || local->probe_req_reg)
+		new_flags |= FIF_PROBE_REQ;
+
+	if (local->fif_fcsfail)
+		new_flags |= FIF_FCSFAIL;
+
+	if (local->fif_plcpfail)
+		new_flags |= FIF_PLCPFAIL;
+
+	if (local->fif_control)
+		new_flags |= FIF_CONTROL;
+
+	if (local->fif_other_bss)
+		new_flags |= FIF_OTHER_BSS;
+
+	if (local->fif_pspoll)
+		new_flags |= FIF_PSPOLL;
+
+	spin_lock_bh(&local->filter_lock);
+	changed_flags = local->filter_flags ^ new_flags;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+	mc = drv_prepare_multicast(local, &local->mc_list);
+#else
+	mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
+#endif
+	spin_unlock_bh(&local->filter_lock);
+
+	/* be a bit nasty */
+	new_flags |= (1<<31);
+
+	drv_configure_filter(local, changed_flags, &new_flags, mc);
+
+	WARN_ON(new_flags & (1<<31));
+
+	local->filter_flags = new_flags & ~(1<<31);
+}
+
+static void ieee80211_reconfig_filter(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, reconfig_filter);
+
+	ieee80211_configure_filter(local);
+}
+
+static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct cfg80211_chan_def chandef = {};
+	u32 changed = 0;
+	int power;
+	u32 offchannel_flag;
+
+	offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
+
+	if (local->scan_channel) {
+		chandef.chan = local->scan_channel;
+		/* If scanning on oper channel, use whatever channel-type
+		 * is currently in use.
+		 */
+		if (chandef.chan == local->_oper_chandef.chan) {
+			chandef = local->_oper_chandef;
+		} else {
+			chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
+			chandef.center_freq1 = chandef.chan->center_freq;
+		}
+	} else if (local->tmp_channel) {
+		chandef.chan = local->tmp_channel;
+		chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
+		chandef.center_freq1 = chandef.chan->center_freq;
+	} else
+		chandef = local->_oper_chandef;
+
+	WARN(!cfg80211_chandef_valid(&chandef),
+	     "control:%d MHz width:%d center: %d/%d MHz",
+	     chandef.chan->center_freq, chandef.width,
+	     chandef.center_freq1, chandef.center_freq2);
+
+	if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
+		local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
+	else
+		local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
+
+	offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
+
+	if (offchannel_flag ||
+	    !cfg80211_chandef_identical(&local->hw.conf.chandef,
+					&local->_oper_chandef)) {
+		local->hw.conf.chandef = chandef;
+		changed |= IEEE80211_CONF_CHANGE_CHANNEL;
+	}
+
+	if (!conf_is_ht(&local->hw.conf)) {
+		/*
+		 * mac80211.h documents that this is only valid
+		 * when the channel is set to an HT type, and
+		 * that otherwise STATIC is used.
+		 */
+		local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
+	} else if (local->hw.conf.smps_mode != local->smps_mode) {
+		local->hw.conf.smps_mode = local->smps_mode;
+		changed |= IEEE80211_CONF_CHANGE_SMPS;
+	}
+
+	power = chandef.chan->max_power;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (!rcu_access_pointer(sdata->vif.chanctx_conf))
+			continue;
+		power = min(power, sdata->vif.bss_conf.txpower);
+	}
+	rcu_read_unlock();
+
+	if (local->hw.conf.power_level != power) {
+		changed |= IEEE80211_CONF_CHANGE_POWER;
+		local->hw.conf.power_level = power;
+	}
+
+	return changed;
+}
+
+int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
+{
+	int ret = 0;
+
+	might_sleep();
+
+	if (!local->use_chanctx)
+		changed |= ieee80211_hw_conf_chan(local);
+	else
+		changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
+			     IEEE80211_CONF_CHANGE_POWER);
+
+	if (changed && local->open_count) {
+		ret = drv_config(local, changed);
+		/*
+		 * Goal:
+		 * HW reconfiguration should never fail, the driver has told
+		 * us what it can support so it should live up to that promise.
+		 *
+		 * Current status:
+		 * rfkill is not integrated with mac80211 and a
+		 * configuration command can thus fail if hardware rfkill
+		 * is enabled
+		 *
+		 * FIXME: integrate rfkill with mac80211 and then add this
+		 * WARN_ON() back
+		 *
+		 */
+		/* WARN_ON(ret); */
+	}
+
+	return ret;
+}
+
+void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
+				      u32 changed)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	if (!changed)
+		return;
+
+	drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
+}
+
+u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
+{
+	sdata->vif.bss_conf.use_cts_prot = false;
+	sdata->vif.bss_conf.use_short_preamble = false;
+	sdata->vif.bss_conf.use_short_slot = false;
+	return BSS_CHANGED_ERP_CTS_PROT |
+	       BSS_CHANGED_ERP_PREAMBLE |
+	       BSS_CHANGED_ERP_SLOT;
+}
+
+static void ieee80211_tasklet_handler(unsigned long data)
+{
+	struct ieee80211_local *local = (struct ieee80211_local *) data;
+	struct sk_buff *skb;
+
+	while ((skb = skb_dequeue(&local->skb_queue)) ||
+	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+		switch (skb->pkt_type) {
+		case IEEE80211_RX_MSG:
+			/* Clear skb->pkt_type in order to not confuse kernel
+			 * netstack. */
+			skb->pkt_type = 0;
+			ieee80211_rx(&local->hw, skb);
+			break;
+		case IEEE80211_TX_STATUS_MSG:
+			skb->pkt_type = 0;
+			ieee80211_tx_status(&local->hw, skb);
+			break;
+		default:
+			WARN(1, "mac80211: Packet is of unknown type %d\n",
+			     skb->pkt_type);
+			dev_kfree_skb(skb);
+			break;
+		}
+	}
+}
+
+static void ieee80211_restart_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, restart_work);
+
+	/* wait for scan work complete */
+	flush_workqueue(local->workqueue);
+
+	mutex_lock(&local->mtx);
+	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
+	     rcu_dereference_protected(local->sched_scan_sdata,
+				       lockdep_is_held(&local->mtx)),
+		"%s called with hardware scan in progress\n", __func__);
+	mutex_unlock(&local->mtx);
+
+	rtnl_lock();
+	ieee80211_scan_cancel(local);
+	ieee80211_reconfig(local);
+	rtnl_unlock();
+}
+
+void ieee80211_restart_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_restart_hw(local);
+
+	wiphy_info(hw->wiphy,
+		   "Hardware restart was requested\n");
+
+	/* use this reason, ieee80211_reconfig will unblock it */
+	ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_SUSPEND);
+
+	/*
+	 * Stop all Rx during the reconfig. We don't want state changes
+	 * or driver callbacks while this is in progress.
+	 */
+	local->in_reconfig = true;
+	barrier();
+
+	schedule_work(&local->restart_work);
+}
+EXPORT_SYMBOL(ieee80211_restart_hw);
+
+#ifdef CONFIG_INET
+static int ieee80211_ifa_changed(struct notifier_block *nb,
+				 unsigned long data, void *arg)
+{
+	struct in_ifaddr *ifa = arg;
+	struct ieee80211_local *local =
+		container_of(nb, struct ieee80211_local,
+			     ifa_notifier);
+	struct net_device *ndev = ifa->ifa_dev->dev;
+	struct wireless_dev *wdev = ndev->ieee80211_ptr;
+	struct in_device *idev;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_bss_conf *bss_conf;
+	struct ieee80211_if_managed *ifmgd;
+	int c = 0;
+
+	/* Make sure it's our interface that got changed */
+	if (!wdev)
+		return NOTIFY_DONE;
+
+	if (wdev->wiphy != local->hw.wiphy)
+		return NOTIFY_DONE;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
+	bss_conf = &sdata->vif.bss_conf;
+
+	/* ARP filtering is only supported in managed mode */
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return NOTIFY_DONE;
+
+	idev = __in_dev_get_rtnl(sdata->dev);
+	if (!idev)
+		return NOTIFY_DONE;
+
+	ifmgd = &sdata->u.mgd;
+	mutex_lock(&ifmgd->mtx);
+
+	/* Copy the addresses to the bss_conf list */
+	ifa = idev->ifa_list;
+	while (ifa) {
+		if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
+			bss_conf->arp_addr_list[c] = ifa->ifa_address;
+		ifa = ifa->ifa_next;
+		c++;
+	}
+
+	bss_conf->arp_addr_cnt = c;
+
+	/* Configure driver only if associated (which also implies it is up) */
+	if (ifmgd->associated)
+		ieee80211_bss_info_change_notify(sdata,
+						 BSS_CHANGED_ARP_FILTER);
+
+	mutex_unlock(&ifmgd->mtx);
+
+	return NOTIFY_DONE;
+}
+#endif
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int ieee80211_ifa6_changed(struct notifier_block *nb,
+				  unsigned long data, void *arg)
+{
+	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
+	struct inet6_dev *idev = ifa->idev;
+	struct net_device *ndev = ifa->idev->dev;
+	struct ieee80211_local *local =
+		container_of(nb, struct ieee80211_local, ifa6_notifier);
+	struct wireless_dev *wdev = ndev->ieee80211_ptr;
+	struct ieee80211_sub_if_data *sdata;
+
+	/* Make sure it's our interface that got changed */
+	if (!wdev || wdev->wiphy != local->hw.wiphy)
+		return NOTIFY_DONE;
+
+	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
+
+	/*
+	 * For now only support station mode. This is mostly because
+	 * doing AP would have to handle AP_VLAN in some way ...
+	 */
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return NOTIFY_DONE;
+
+	drv_ipv6_addr_change(local, sdata, idev);
+
+	return NOTIFY_DONE;
+}
+#endif
+
+/* There isn't a lot of sense in it, but you can transmit anything you like */
+static const struct ieee80211_txrx_stypes
+ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
+	[NL80211_IFTYPE_ADHOC] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+	[NL80211_IFTYPE_STATION] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+	[NL80211_IFTYPE_AP] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_ACTION >> 4),
+	},
+	[NL80211_IFTYPE_AP_VLAN] = {
+		/* copy AP */
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_ACTION >> 4),
+	},
+	[NL80211_IFTYPE_P2P_CLIENT] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+	[NL80211_IFTYPE_P2P_GO] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
+			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_ACTION >> 4),
+	},
+	[NL80211_IFTYPE_MESH_POINT] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_AUTH >> 4) |
+			BIT(IEEE80211_STYPE_DEAUTH >> 4),
+	},
+	[NL80211_IFTYPE_P2P_DEVICE] = {
+		.tx = 0xffff,
+		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
+	},
+};
+
+static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
+	.ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
+			     IEEE80211_HT_AMPDU_PARM_DENSITY,
+
+	.cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
+				IEEE80211_HT_CAP_MAX_AMSDU |
+				IEEE80211_HT_CAP_SGI_20 |
+				IEEE80211_HT_CAP_SGI_40),
+	.mcs = {
+		.rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
+			     0xff, 0xff, 0xff, 0xff, 0xff, },
+	},
+};
+
+static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
+	.vht_cap_info =
+		cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
+			    IEEE80211_VHT_CAP_SHORT_GI_80 |
+			    IEEE80211_VHT_CAP_SHORT_GI_160 |
+			    IEEE80211_VHT_CAP_RXSTBC_1 |
+			    IEEE80211_VHT_CAP_RXSTBC_2 |
+			    IEEE80211_VHT_CAP_RXSTBC_3 |
+			    IEEE80211_VHT_CAP_RXSTBC_4 |
+			    IEEE80211_VHT_CAP_TXSTBC |
+			    IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
+			    IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
+			    IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
+			    IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
+			    IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
+	.supp_mcs = {
+		.rx_mcs_map = cpu_to_le16(~0),
+		.tx_mcs_map = cpu_to_le16(~0),
+	},
+};
+
+static const u8 extended_capabilities[] = {
+	0, 0, 0, 0, 0, 0, 0,
+	WLAN_EXT_CAPA8_OPMODE_NOTIF,
+};
+
+struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
+					const struct ieee80211_ops *ops)
+{
+	struct ieee80211_local *local;
+	int priv_size, i;
+	struct wiphy *wiphy;
+	bool use_chanctx;
+
+	if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
+		    !ops->add_interface || !ops->remove_interface ||
+		    !ops->configure_filter))
+		return NULL;
+
+	if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
+		return NULL;
+
+	/* check all or no channel context operations exist */
+	i = !!ops->add_chanctx + !!ops->remove_chanctx +
+	    !!ops->change_chanctx + !!ops->assign_vif_chanctx +
+	    !!ops->unassign_vif_chanctx;
+	if (WARN_ON(i != 0 && i != 5))
+		return NULL;
+	use_chanctx = i == 5;
+
+	/* Ensure 32-byte alignment of our private data and hw private data.
+	 * We use the wiphy priv data for both our ieee80211_local and for
+	 * the driver's private data
+	 *
+	 * In memory it'll be like this:
+	 *
+	 * +-------------------------+
+	 * | struct wiphy	    |
+	 * +-------------------------+
+	 * | struct ieee80211_local  |
+	 * +-------------------------+
+	 * | driver's private data   |
+	 * +-------------------------+
+	 *
+	 */
+	priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
+
+	wiphy = wiphy_new(&mac80211_config_ops, priv_size);
+
+	if (!wiphy)
+		return NULL;
+
+	wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
+
+	wiphy->privid = mac80211_wiphy_privid;
+
+	wiphy->flags |= WIPHY_FLAG_NETNS_OK |
+			WIPHY_FLAG_4ADDR_AP |
+			WIPHY_FLAG_4ADDR_STATION |
+			WIPHY_FLAG_REPORTS_OBSS |
+			WIPHY_FLAG_OFFCHAN_TX;
+
+	wiphy->extended_capabilities = extended_capabilities;
+	wiphy->extended_capabilities_mask = extended_capabilities;
+	wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
+
+	if (ops->remain_on_channel)
+		wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
+
+	wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
+			   NL80211_FEATURE_SAE |
+			   NL80211_FEATURE_HT_IBSS |
+			   NL80211_FEATURE_VIF_TXPOWER |
+			   NL80211_FEATURE_USERSPACE_MPM;
+
+	if (!ops->hw_scan)
+		wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
+				   NL80211_FEATURE_AP_SCAN;
+
+
+	if (!ops->set_key)
+		wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
+
+	wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
+
+	local = wiphy_priv(wiphy);
+
+	local->hw.wiphy = wiphy;
+
+	local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
+
+	local->ops = ops;
+	local->use_chanctx = use_chanctx;
+
+	/* set up some defaults */
+	local->hw.queues = 1;
+	local->hw.max_rates = 1;
+	local->hw.max_report_rates = 0;
+	local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
+	local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
+	local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
+	local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
+	local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
+	local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
+					 IEEE80211_RADIOTAP_MCS_HAVE_GI |
+					 IEEE80211_RADIOTAP_MCS_HAVE_BW;
+	local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
+					 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
+	local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
+	local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
+	local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
+	wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
+	wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
+
+	INIT_LIST_HEAD(&local->interfaces);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+
+	__hw_addr_init(&local->mc_list);
+
+#endif
+	mutex_init(&local->iflist_mtx);
+	mutex_init(&local->mtx);
+
+	mutex_init(&local->key_mtx);
+	spin_lock_init(&local->filter_lock);
+	spin_lock_init(&local->rx_path_lock);
+	spin_lock_init(&local->queue_stop_reason_lock);
+
+	INIT_LIST_HEAD(&local->chanctx_list);
+	mutex_init(&local->chanctx_mtx);
+
+	INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
+
+	INIT_WORK(&local->restart_work, ieee80211_restart_work);
+
+	INIT_WORK(&local->radar_detected_work,
+		  ieee80211_dfs_radar_detected_work);
+
+	INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
+	local->smps_mode = IEEE80211_SMPS_OFF;
+
+	INIT_WORK(&local->dynamic_ps_enable_work,
+		  ieee80211_dynamic_ps_enable_work);
+	INIT_WORK(&local->dynamic_ps_disable_work,
+		  ieee80211_dynamic_ps_disable_work);
+	setup_timer(&local->dynamic_ps_timer,
+		    ieee80211_dynamic_ps_timer, (unsigned long) local);
+
+	INIT_WORK(&local->sched_scan_stopped_work,
+		  ieee80211_sched_scan_stopped_work);
+
+	spin_lock_init(&local->ack_status_lock);
+	idr_init(&local->ack_status_frames);
+
+	sta_info_init(local);
+
+	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
+		skb_queue_head_init(&local->pending[i]);
+		atomic_set(&local->agg_queue_stop[i], 0);
+	}
+	tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
+		     (unsigned long)local);
+
+	tasklet_init(&local->tasklet,
+		     ieee80211_tasklet_handler,
+		     (unsigned long) local);
+
+	skb_queue_head_init(&local->skb_queue);
+	skb_queue_head_init(&local->skb_queue_unreliable);
+
+	ieee80211_led_names(local);
+
+	ieee80211_roc_setup(local);
+
+	return &local->hw;
+}
+EXPORT_SYMBOL(ieee80211_alloc_hw);
+
+int ieee80211_register_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	int result, i;
+	enum ieee80211_band band;
+	int channels, max_bitrates;
+	bool supp_ht, supp_vht;
+	netdev_features_t feature_whitelist;
+	struct cfg80211_chan_def dflt_chandef = {};
+	static const u32 cipher_suites[] = {
+		/* keep WEP first, it may be removed below */
+		WLAN_CIPHER_SUITE_WEP40,
+		WLAN_CIPHER_SUITE_WEP104,
+		WLAN_CIPHER_SUITE_TKIP,
+		WLAN_CIPHER_SUITE_CCMP,
+
+		/* keep last -- depends on hw flags! */
+		WLAN_CIPHER_SUITE_AES_CMAC
+	};
+
+	if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
+	    (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
+	     local->hw.offchannel_tx_hw_queue >= local->hw.queues))
+		return -EINVAL;
+
+#ifdef CONFIG_PM
+	if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
+	    (!local->ops->suspend || !local->ops->resume))
+		return -EINVAL;
+#endif
+
+	if (!local->use_chanctx) {
+		for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
+			const struct ieee80211_iface_combination *comb;
+
+			comb = &local->hw.wiphy->iface_combinations[i];
+
+			if (comb->num_different_channels > 1)
+				return -EINVAL;
+		}
+	} else {
+		/*
+		 * WDS is currently prohibited when channel contexts are used
+		 * because there's no clear definition of which channel WDS
+		 * type interfaces use
+		 */
+		if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
+			return -EINVAL;
+
+		/* DFS currently not supported with channel context drivers */
+		for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
+			const struct ieee80211_iface_combination *comb;
+
+			comb = &local->hw.wiphy->iface_combinations[i];
+
+			if (comb->radar_detect_widths)
+				return -EINVAL;
+		}
+	}
+
+	/* Only HW csum features are currently compatible with mac80211 */
+	feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+			    NETIF_F_HW_CSUM;
+	if (WARN_ON(hw->netdev_features & ~feature_whitelist))
+		return -EINVAL;
+
+	if (hw->max_report_rates == 0)
+		hw->max_report_rates = hw->max_rates;
+
+	local->rx_chains = 1;
+
+	/*
+	 * generic code guarantees at least one band,
+	 * set this very early because much code assumes
+	 * that hw.conf.channel is assigned
+	 */
+	channels = 0;
+	max_bitrates = 0;
+	supp_ht = false;
+	supp_vht = false;
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+		struct ieee80211_supported_band *sband;
+
+		sband = local->hw.wiphy->bands[band];
+		if (!sband)
+			continue;
+
+		if (!dflt_chandef.chan) {
+			cfg80211_chandef_create(&dflt_chandef,
+						&sband->channels[0],
+						NL80211_CHAN_NO_HT);
+			/* init channel we're on */
+			if (!local->use_chanctx && !local->_oper_chandef.chan) {
+				local->hw.conf.chandef = dflt_chandef;
+				local->_oper_chandef = dflt_chandef;
+			}
+			local->monitor_chandef = dflt_chandef;
+		}
+
+		channels += sband->n_channels;
+
+		if (max_bitrates < sband->n_bitrates)
+			max_bitrates = sband->n_bitrates;
+		supp_ht = supp_ht || sband->ht_cap.ht_supported;
+		supp_vht = supp_vht || sband->vht_cap.vht_supported;
+
+		if (sband->ht_cap.ht_supported)
+			local->rx_chains =
+				max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
+				    local->rx_chains);
+
+		/* TODO: consider VHT for RX chains, hopefully it's the same */
+	}
+
+	local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
+				      sizeof(void *) * channels, GFP_KERNEL);
+	if (!local->int_scan_req)
+		return -ENOMEM;
+
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+		if (!local->hw.wiphy->bands[band])
+			continue;
+		local->int_scan_req->rates[band] = (u32) -1;
+	}
+
+	/* if low-level driver supports AP, we also support VLAN */
+	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
+		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
+		hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
+	}
+
+	/* mac80211 always supports monitor */
+	hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
+	hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
+
+	/* mac80211 doesn't support more than one IBSS interface right now */
+	for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
+		const struct ieee80211_iface_combination *c;
+		int j;
+
+		c = &hw->wiphy->iface_combinations[i];
+
+		for (j = 0; j < c->n_limits; j++)
+			if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
+			    c->limits[j].max > 1)
+				return -EINVAL;
+	}
+
+#ifndef CPTCFG_MAC80211_MESH
+	/* mesh depends on Kconfig, but drivers should set it if they want */
+	local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
+#endif
+
+	/* if the underlying driver supports mesh, mac80211 will (at least)
+	 * provide routing of mesh authentication frames to userspace */
+	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
+		local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
+
+	/* mac80211 supports control port protocol changing */
+	local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
+
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
+	else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
+		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
+
+	WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
+	     && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
+	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
+
+	/*
+	 * Calculate scan IE length -- we need this to alloc
+	 * memory and to subtract from the driver limit. It
+	 * includes the DS Params, (extended) supported rates, and HT
+	 * information -- SSID is the driver's responsibility.
+	 */
+	local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
+		3 /* DS Params */;
+	if (supp_ht)
+		local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
+
+	if (supp_vht)
+		local->scan_ies_len +=
+			2 + sizeof(struct ieee80211_vht_cap);
+
+	if (!local->ops->hw_scan) {
+		/* For hw_scan, driver needs to set these up. */
+		local->hw.wiphy->max_scan_ssids = 4;
+		local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
+	}
+
+	/*
+	 * If the driver supports any scan IEs, then assume the
+	 * limit includes the IEs mac80211 will add, otherwise
+	 * leave it at zero and let the driver sort it out; we
+	 * still pass our IEs to the driver but userspace will
+	 * not be allowed to in that case.
+	 */
+	if (local->hw.wiphy->max_scan_ie_len)
+		local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
+
+	/* Set up cipher suites unless driver already did */
+	if (!local->hw.wiphy->cipher_suites) {
+		local->hw.wiphy->cipher_suites = cipher_suites;
+		local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
+		if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
+			local->hw.wiphy->n_cipher_suites--;
+	}
+	if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
+		if (local->hw.wiphy->cipher_suites == cipher_suites) {
+			local->hw.wiphy->cipher_suites += 2;
+			local->hw.wiphy->n_cipher_suites -= 2;
+		} else {
+			u32 *suites;
+			int r, w = 0;
+
+			/* Filter out WEP */
+
+			suites = kmemdup(
+				local->hw.wiphy->cipher_suites,
+				sizeof(u32) * local->hw.wiphy->n_cipher_suites,
+				GFP_KERNEL);
+			if (!suites) {
+				result = -ENOMEM;
+				goto fail_wiphy_register;
+			}
+			for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
+				u32 suite = local->hw.wiphy->cipher_suites[r];
+				if (suite == WLAN_CIPHER_SUITE_WEP40 ||
+				    suite == WLAN_CIPHER_SUITE_WEP104)
+					continue;
+				suites[w++] = suite;
+			}
+			local->hw.wiphy->cipher_suites = suites;
+			local->hw.wiphy->n_cipher_suites = w;
+			local->wiphy_ciphers_allocated = true;
+		}
+	}
+
+	if (!local->ops->remain_on_channel)
+		local->hw.wiphy->max_remain_on_channel_duration = 5000;
+
+	if (local->ops->sched_scan_start)
+		local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
+
+	/* mac80211 based drivers don't support internal TDLS setup */
+	if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
+		local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
+
+	result = wiphy_register(local->hw.wiphy);
+	if (result < 0)
+		goto fail_wiphy_register;
+
+	/*
+	 * We use the number of queues for feature tests (QoS, HT) internally
+	 * so restrict them appropriately.
+	 */
+	if (hw->queues > IEEE80211_MAX_QUEUES)
+		hw->queues = IEEE80211_MAX_QUEUES;
+
+	local->workqueue =
+		alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
+	if (!local->workqueue) {
+		result = -ENOMEM;
+		goto fail_workqueue;
+	}
+
+	/*
+	 * The hardware needs headroom for sending the frame,
+	 * and we need some headroom for passing the frame to monitor
+	 * interfaces, but never both at the same time.
+	 */
+	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
+				   IEEE80211_TX_STATUS_HEADROOM);
+
+	debugfs_hw_add(local);
+
+	/*
+	 * if the driver doesn't specify a max listen interval we
+	 * use 5 which should be a safe default
+	 */
+	if (local->hw.max_listen_interval == 0)
+		local->hw.max_listen_interval = 5;
+
+	local->hw.conf.listen_interval = local->hw.max_listen_interval;
+
+	local->dynamic_ps_forced_timeout = -1;
+
+	result = ieee80211_wep_init(local);
+	if (result < 0)
+		wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
+			    result);
+
+	ieee80211_led_init(local);
+
+	rtnl_lock();
+
+	result = ieee80211_init_rate_ctrl_alg(local,
+					      hw->rate_control_algorithm);
+	if (result < 0) {
+		wiphy_debug(local->hw.wiphy,
+			    "Failed to initialize rate control algorithm\n");
+		goto fail_rate;
+	}
+
+	/* add one default STA interface if supported */
+	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
+		result = ieee80211_if_add(local, "wlan%d", NULL,
+					  NL80211_IFTYPE_STATION, NULL);
+		if (result)
+			wiphy_warn(local->hw.wiphy,
+				   "Failed to add default virtual iface\n");
+	}
+
+	rtnl_unlock();
+
+	local->network_latency_notifier.notifier_call =
+		ieee80211_max_network_latency;
+	result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
+				     &local->network_latency_notifier);
+	if (result) {
+		rtnl_lock();
+		goto fail_pm_qos;
+	}
+
+#ifdef CONFIG_INET
+	local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
+	result = register_inetaddr_notifier(&local->ifa_notifier);
+	if (result)
+		goto fail_ifa;
+#endif
+
+#if IS_ENABLED(CONFIG_IPV6)
+	local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
+	result = register_inet6addr_notifier(&local->ifa6_notifier);
+	if (result)
+		goto fail_ifa6;
+#endif
+
+	return 0;
+
+#if IS_ENABLED(CONFIG_IPV6)
+ fail_ifa6:
+#ifdef CONFIG_INET
+	unregister_inetaddr_notifier(&local->ifa_notifier);
+#endif
+#endif
+#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
+ fail_ifa:
+	pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
+			       &local->network_latency_notifier);
+	rtnl_lock();
+#endif
+ fail_pm_qos:
+	ieee80211_led_exit(local);
+	ieee80211_remove_interfaces(local);
+ fail_rate:
+	rtnl_unlock();
+	ieee80211_wep_free(local);
+	sta_info_stop(local);
+	destroy_workqueue(local->workqueue);
+ fail_workqueue:
+	wiphy_unregister(local->hw.wiphy);
+ fail_wiphy_register:
+	if (local->wiphy_ciphers_allocated)
+		kfree(local->hw.wiphy->cipher_suites);
+	kfree(local->int_scan_req);
+	return result;
+}
+EXPORT_SYMBOL(ieee80211_register_hw);
+
+void ieee80211_unregister_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	tasklet_kill(&local->tx_pending_tasklet);
+	tasklet_kill(&local->tasklet);
+
+	pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
+			       &local->network_latency_notifier);
+#ifdef CONFIG_INET
+	unregister_inetaddr_notifier(&local->ifa_notifier);
+#endif
+#if IS_ENABLED(CONFIG_IPV6)
+	unregister_inet6addr_notifier(&local->ifa6_notifier);
+#endif
+
+	rtnl_lock();
+
+	/*
+	 * At this point, interface list manipulations are fine
+	 * because the driver cannot be handing us frames any
+	 * more and the tasklet is killed.
+	 */
+	ieee80211_remove_interfaces(local);
+
+	rtnl_unlock();
+
+	cancel_work_sync(&local->restart_work);
+	cancel_work_sync(&local->reconfig_filter);
+
+	ieee80211_clear_tx_pending(local);
+	rate_control_deinitialize(local);
+
+	if (skb_queue_len(&local->skb_queue) ||
+	    skb_queue_len(&local->skb_queue_unreliable))
+		wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
+	skb_queue_purge(&local->skb_queue);
+	skb_queue_purge(&local->skb_queue_unreliable);
+
+	destroy_workqueue(local->workqueue);
+	wiphy_unregister(local->hw.wiphy);
+	sta_info_stop(local);
+	ieee80211_wep_free(local);
+	ieee80211_led_exit(local);
+	kfree(local->int_scan_req);
+}
+EXPORT_SYMBOL(ieee80211_unregister_hw);
+
+static int ieee80211_free_ack_frame(int id, void *p, void *data)
+{
+	WARN_ONCE(1, "Have pending ack frames!\n");
+	kfree_skb(p);
+	return 0;
+}
+
+void ieee80211_free_hw(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	mutex_destroy(&local->iflist_mtx);
+	mutex_destroy(&local->mtx);
+
+	if (local->wiphy_ciphers_allocated)
+		kfree(local->hw.wiphy->cipher_suites);
+
+	idr_for_each(&local->ack_status_frames,
+		     ieee80211_free_ack_frame, NULL);
+	idr_destroy(&local->ack_status_frames);
+
+	wiphy_free(local->hw.wiphy);
+}
+EXPORT_SYMBOL(ieee80211_free_hw);
+
+static int __init ieee80211_init(void)
+{
+	struct sk_buff *skb;
+	int ret;
+
+	BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
+	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
+		     IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
+
+	ret = rc80211_minstrel_init();
+	if (ret)
+		return ret;
+
+	ret = rc80211_minstrel_ht_init();
+	if (ret)
+		goto err_minstrel;
+
+	ret = rc80211_pid_init();
+	if (ret)
+		goto err_pid;
+
+	ret = ieee80211_iface_init();
+	if (ret)
+		goto err_netdev;
+
+	return 0;
+ err_netdev:
+	rc80211_pid_exit();
+ err_pid:
+	rc80211_minstrel_ht_exit();
+ err_minstrel:
+	rc80211_minstrel_exit();
+
+	return ret;
+}
+
+static void __exit ieee80211_exit(void)
+{
+	rc80211_pid_exit();
+	rc80211_minstrel_ht_exit();
+	rc80211_minstrel_exit();
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37))
+	flush_scheduled_work();
+#endif
+
+	ieee80211s_stop();
+
+	ieee80211_iface_exit();
+
+	rcu_barrier();
+}
+
+
+subsys_initcall(ieee80211_init);
+module_exit(ieee80211_exit);
+
+MODULE_DESCRIPTION("IEEE 802.11 subsystem");
+MODULE_LICENSE("GPL");
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
new file mode 100644
index 0000000..6952760
--- /dev/null
+++ b/net/mac80211/mesh.c
@@ -0,0 +1,1047 @@
+/*
+ * Copyright (c) 2008, 2009 open80211s Ltd.
+ * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
+ * 	       Javier Cardona <javier@cozybit.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+#include "ieee80211_i.h"
+#include "mesh.h"
+
+static int mesh_allocated;
+static struct kmem_cache *rm_cache;
+
+bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
+{
+	return (mgmt->u.action.u.mesh_action.action_code ==
+			WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
+}
+
+void ieee80211s_init(void)
+{
+	mesh_pathtbl_init();
+	mesh_allocated = 1;
+	rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
+				     0, 0, NULL);
+}
+
+void ieee80211s_stop(void)
+{
+	if (!mesh_allocated)
+		return;
+	mesh_pathtbl_unregister();
+	kmem_cache_destroy(rm_cache);
+}
+
+static void ieee80211_mesh_housekeeping_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata = (void *) data;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
+
+	ieee80211_queue_work(&local->hw, &sdata->work);
+}
+
+/**
+ * mesh_matches_local - check if the config of a mesh point matches ours
+ *
+ * @sdata: local mesh subif
+ * @ie: information elements of a management frame from the mesh peer
+ *
+ * This function checks if the mesh configuration of a mesh point matches the
+ * local mesh configuration, i.e. if both nodes belong to the same mesh network.
+ */
+bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
+			struct ieee802_11_elems *ie)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+	u32 basic_rates = 0;
+	struct cfg80211_chan_def sta_chan_def;
+
+	/*
+	 * As support for each feature is added, check for matching
+	 * - On mesh config capabilities
+	 *   - Power Save Support En
+	 *   - Sync support enabled
+	 *   - Sync support active
+	 *   - Sync support required from peer
+	 *   - MDA enabled
+	 * - Power management control on fc
+	 */
+	if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
+	     memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
+	     (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
+	     (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
+	     (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
+	     (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
+	     (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
+		return false;
+
+	ieee80211_sta_get_rates(local, ie, ieee80211_get_sdata_band(sdata),
+				&basic_rates);
+
+	if (sdata->vif.bss_conf.basic_rates != basic_rates)
+		return false;
+
+	ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
+				     ie->ht_operation, &sta_chan_def);
+
+	if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
+					 &sta_chan_def))
+		return false;
+
+	return true;
+}
+
+/**
+ * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
+ *
+ * @ie: information elements of a management frame from the mesh peer
+ */
+bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
+{
+	return (ie->mesh_config->meshconf_cap &
+			IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
+}
+
+/**
+ * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
+ *
+ * @sdata: mesh interface in which mesh beacons are going to be updated
+ *
+ * Returns: beacon changed flag if the beacon content changed.
+ */
+u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
+{
+	bool free_plinks;
+	u32 changed = 0;
+
+	/* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
+	 * the mesh interface might be able to establish plinks with peers that
+	 * are already on the table but are not on PLINK_ESTAB state. However,
+	 * in general the mesh interface is not accepting peer link requests
+	 * from new peers, and that must be reflected in the beacon
+	 */
+	free_plinks = mesh_plink_availables(sdata);
+
+	if (free_plinks != sdata->u.mesh.accepting_plinks) {
+		sdata->u.mesh.accepting_plinks = free_plinks;
+		changed = BSS_CHANGED_BEACON;
+	}
+
+	return changed;
+}
+
+/*
+ * mesh_sta_cleanup - clean up any mesh sta state
+ *
+ * @sta: mesh sta to clean up.
+ */
+void mesh_sta_cleanup(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	u32 changed;
+
+	/*
+	 * maybe userspace handles peer allocation and peering, but in either
+	 * case the beacon is still generated by the kernel and we might need
+	 * an update.
+	 */
+	changed = mesh_accept_plinks_update(sdata);
+	if (!sdata->u.mesh.user_mpm) {
+		changed |= mesh_plink_deactivate(sta);
+		del_timer_sync(&sta->plink_timer);
+	}
+
+	if (changed)
+		ieee80211_mbss_info_change_notify(sdata, changed);
+}
+
+int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
+{
+	int i;
+
+	sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
+	if (!sdata->u.mesh.rmc)
+		return -ENOMEM;
+	sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
+	for (i = 0; i < RMC_BUCKETS; i++)
+		INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
+	return 0;
+}
+
+void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
+{
+	struct mesh_rmc *rmc = sdata->u.mesh.rmc;
+	struct rmc_entry *p, *n;
+	int i;
+
+	if (!sdata->u.mesh.rmc)
+		return;
+
+	for (i = 0; i < RMC_BUCKETS; i++) {
+		list_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
+			list_del(&p->list);
+			kmem_cache_free(rm_cache, p);
+		}
+	}
+
+	kfree(rmc);
+	sdata->u.mesh.rmc = NULL;
+}
+
+/**
+ * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
+ *
+ * @sdata:	interface
+ * @sa:		source address
+ * @mesh_hdr:	mesh_header
+ *
+ * Returns: 0 if the frame is not in the cache, nonzero otherwise.
+ *
+ * Checks using the source address and the mesh sequence number if we have
+ * received this frame lately. If the frame is not in the cache, it is added to
+ * it.
+ */
+int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
+		   const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
+{
+	struct mesh_rmc *rmc = sdata->u.mesh.rmc;
+	u32 seqnum = 0;
+	int entries = 0;
+	u8 idx;
+	struct rmc_entry *p, *n;
+
+	/* Don't care about endianness since only match matters */
+	memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
+	idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
+	list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
+		++entries;
+		if (time_after(jiffies, p->exp_time) ||
+		    entries == RMC_QUEUE_MAX_LEN) {
+			list_del(&p->list);
+			kmem_cache_free(rm_cache, p);
+			--entries;
+		} else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
+			return -1;
+	}
+
+	p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
+	if (!p)
+		return 0;
+
+	p->seqnum = seqnum;
+	p->exp_time = jiffies + RMC_TIMEOUT;
+	memcpy(p->sa, sa, ETH_ALEN);
+	list_add(&p->list, &rmc->bucket[idx]);
+	return 0;
+}
+
+int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
+			 struct sk_buff *skb)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u8 *pos, neighbors;
+	u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
+
+	if (skb_tailroom(skb) < 2 + meshconf_len)
+		return -ENOMEM;
+
+	pos = skb_put(skb, 2 + meshconf_len);
+	*pos++ = WLAN_EID_MESH_CONFIG;
+	*pos++ = meshconf_len;
+
+	/* Active path selection protocol ID */
+	*pos++ = ifmsh->mesh_pp_id;
+	/* Active path selection metric ID   */
+	*pos++ = ifmsh->mesh_pm_id;
+	/* Congestion control mode identifier */
+	*pos++ = ifmsh->mesh_cc_id;
+	/* Synchronization protocol identifier */
+	*pos++ = ifmsh->mesh_sp_id;
+	/* Authentication Protocol identifier */
+	*pos++ = ifmsh->mesh_auth_id;
+	/* Mesh Formation Info - number of neighbors */
+	neighbors = atomic_read(&ifmsh->estab_plinks);
+	/* Number of neighbor mesh STAs or 15 whichever is smaller */
+	neighbors = (neighbors > 15) ? 15 : neighbors;
+	*pos++ = neighbors << 1;
+	/* Mesh capability */
+	*pos = IEEE80211_MESHCONF_CAPAB_FORWARDING;
+	*pos |= ifmsh->accepting_plinks ?
+			IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
+	/* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
+	*pos |= ifmsh->ps_peers_deep_sleep ?
+			IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
+	*pos++ |= ifmsh->adjusting_tbtt ?
+			IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00;
+	*pos++ = 0x00;
+
+	return 0;
+}
+
+int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u8 *pos;
+
+	if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
+		return -ENOMEM;
+
+	pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
+	*pos++ = WLAN_EID_MESH_ID;
+	*pos++ = ifmsh->mesh_id_len;
+	if (ifmsh->mesh_id_len)
+		memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
+
+	return 0;
+}
+
+static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
+				    struct sk_buff *skb)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u8 *pos;
+
+	/* see IEEE802.11-2012 13.14.6 */
+	if (ifmsh->ps_peers_light_sleep == 0 &&
+	    ifmsh->ps_peers_deep_sleep == 0 &&
+	    ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
+		return 0;
+
+	if (skb_tailroom(skb) < 4)
+		return -ENOMEM;
+
+	pos = skb_put(skb, 2 + 2);
+	*pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
+	*pos++ = 2;
+	put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
+
+	return 0;
+}
+
+int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
+			struct sk_buff *skb)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u8 offset, len;
+	const u8 *data;
+
+	if (!ifmsh->ie || !ifmsh->ie_len)
+		return 0;
+
+	/* fast-forward to vendor IEs */
+	offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
+
+	if (offset) {
+		len = ifmsh->ie_len - offset;
+		data = ifmsh->ie + offset;
+		if (skb_tailroom(skb) < len)
+			return -ENOMEM;
+		memcpy(skb_put(skb, len), data, len);
+	}
+
+	return 0;
+}
+
+int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u8 len = 0;
+	const u8 *data;
+
+	if (!ifmsh->ie || !ifmsh->ie_len)
+		return 0;
+
+	/* find RSN IE */
+	data = ifmsh->ie;
+	while (data < ifmsh->ie + ifmsh->ie_len) {
+		if (*data == WLAN_EID_RSN) {
+			len = data[1] + 2;
+			break;
+		}
+		data++;
+	}
+
+	if (len) {
+		if (skb_tailroom(skb) < len)
+			return -ENOMEM;
+		memcpy(skb_put(skb, len), data, len);
+	}
+
+	return 0;
+}
+
+static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb)
+{
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *chan;
+	u8 *pos;
+
+	if (skb_tailroom(skb) < 3)
+		return -ENOMEM;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+	chan = chanctx_conf->def.chan;
+	rcu_read_unlock();
+
+	pos = skb_put(skb, 2 + 1);
+	*pos++ = WLAN_EID_DS_PARAMS;
+	*pos++ = 1;
+	*pos++ = ieee80211_frequency_to_channel(chan->center_freq);
+
+	return 0;
+}
+
+int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
+		       struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+	struct ieee80211_supported_band *sband;
+	u8 *pos;
+
+	sband = local->hw.wiphy->bands[band];
+	if (!sband->ht_cap.ht_supported ||
+	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
+		return 0;
+
+	if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
+		return -ENOMEM;
+
+	pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
+	ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
+
+	return 0;
+}
+
+int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
+			struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *channel;
+	enum nl80211_channel_type channel_type =
+		cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef);
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_sta_ht_cap *ht_cap;
+	u8 *pos;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+	channel = chanctx_conf->def.chan;
+	rcu_read_unlock();
+
+	sband = local->hw.wiphy->bands[channel->band];
+	ht_cap = &sband->ht_cap;
+
+	if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT)
+		return 0;
+
+	if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
+		return -ENOMEM;
+
+	pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
+	ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
+				   sdata->vif.bss_conf.ht_operation_mode);
+
+	return 0;
+}
+
+static void ieee80211_mesh_path_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+}
+
+static void ieee80211_mesh_path_root_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+}
+
+void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
+{
+	if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
+		set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
+	else {
+		clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
+		/* stop running timer */
+		del_timer_sync(&ifmsh->mesh_path_root_timer);
+	}
+}
+
+/**
+ * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
+ * @hdr:	802.11 frame header
+ * @fc:		frame control field
+ * @meshda:	destination address in the mesh
+ * @meshsa:	source address address in the mesh.  Same as TA, as frame is
+ *              locally originated.
+ *
+ * Return the length of the 802.11 (does not include a mesh control header)
+ */
+int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
+				  const u8 *meshda, const u8 *meshsa)
+{
+	if (is_multicast_ether_addr(meshda)) {
+		*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
+		/* DA TA SA */
+		memcpy(hdr->addr1, meshda, ETH_ALEN);
+		memcpy(hdr->addr2, meshsa, ETH_ALEN);
+		memcpy(hdr->addr3, meshsa, ETH_ALEN);
+		return 24;
+	} else {
+		*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
+		/* RA TA DA SA */
+		memset(hdr->addr1, 0, ETH_ALEN);   /* RA is resolved later */
+		memcpy(hdr->addr2, meshsa, ETH_ALEN);
+		memcpy(hdr->addr3, meshda, ETH_ALEN);
+		memcpy(hdr->addr4, meshsa, ETH_ALEN);
+		return 30;
+	}
+}
+
+/**
+ * ieee80211_new_mesh_header - create a new mesh header
+ * @sdata:	mesh interface to be used
+ * @meshhdr:    uninitialized mesh header
+ * @addr4or5:   1st address in the ae header, which may correspond to address 4
+ *              (if addr6 is NULL) or address 5 (if addr6 is present). It may
+ *              be NULL.
+ * @addr6:	2nd address in the ae header, which corresponds to addr6 of the
+ *              mesh frame
+ *
+ * Return the header length.
+ */
+int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
+			      struct ieee80211s_hdr *meshhdr,
+			      const char *addr4or5, const char *addr6)
+{
+	if (WARN_ON(!addr4or5 && addr6))
+		return 0;
+
+	memset(meshhdr, 0, sizeof(*meshhdr));
+
+	meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
+
+	/* FIXME: racy -- TX on multiple queues can be concurrent */
+	put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
+	sdata->u.mesh.mesh_seqnum++;
+
+	if (addr4or5 && !addr6) {
+		meshhdr->flags |= MESH_FLAGS_AE_A4;
+		memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
+		return 2 * ETH_ALEN;
+	} else if (addr4or5 && addr6) {
+		meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
+		memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
+		memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
+		return 3 * ETH_ALEN;
+	}
+
+	return ETH_ALEN;
+}
+
+static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u32 changed;
+
+	ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
+	mesh_path_expire(sdata);
+
+	changed = mesh_accept_plinks_update(sdata);
+	ieee80211_mbss_info_change_notify(sdata, changed);
+
+	mod_timer(&ifmsh->housekeeping_timer,
+		  round_jiffies(jiffies +
+				IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
+}
+
+static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u32 interval;
+
+	mesh_path_tx_root_frame(sdata);
+
+	if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
+		interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
+	else
+		interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
+
+	mod_timer(&ifmsh->mesh_path_root_timer,
+		  round_jiffies(TU_TO_EXP_TIME(interval)));
+}
+
+static int
+ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
+{
+	struct beacon_data *bcn;
+	int head_len, tail_len;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	enum ieee80211_band band;
+	u8 *pos;
+	struct ieee80211_sub_if_data *sdata;
+	int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) +
+		      sizeof(mgmt->u.beacon);
+
+	sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	band = chanctx_conf->def.chan->band;
+	rcu_read_unlock();
+
+	head_len = hdr_len +
+		   2 + /* NULL SSID */
+		   2 + 8 + /* supported rates */
+		   2 + 3; /* DS params */
+	tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
+		   2 + sizeof(struct ieee80211_ht_cap) +
+		   2 + sizeof(struct ieee80211_ht_operation) +
+		   2 + ifmsh->mesh_id_len +
+		   2 + sizeof(struct ieee80211_meshconf_ie) +
+		   2 + sizeof(__le16) + /* awake window */
+		   ifmsh->ie_len;
+
+	bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
+	/* need an skb for IE builders to operate on */
+	skb = dev_alloc_skb(max(head_len, tail_len));
+
+	if (!bcn || !skb)
+		goto out_free;
+
+	/*
+	 * pointers go into the block we allocated,
+	 * memory is | beacon_data | head | tail |
+	 */
+	bcn->head = ((u8 *) bcn) + sizeof(*bcn);
+
+	/* fill in the head */
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
+	memset(mgmt, 0, hdr_len);
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_BEACON);
+	eth_broadcast_addr(mgmt->da);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
+	ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
+	mgmt->u.beacon.beacon_int =
+		cpu_to_le16(sdata->vif.bss_conf.beacon_int);
+	mgmt->u.beacon.capab_info |= cpu_to_le16(
+		sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
+
+	pos = skb_put(skb, 2);
+	*pos++ = WLAN_EID_SSID;
+	*pos++ = 0x0;
+
+	if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
+	    mesh_add_ds_params_ie(sdata, skb))
+		goto out_free;
+
+	bcn->head_len = skb->len;
+	memcpy(bcn->head, skb->data, bcn->head_len);
+
+	/* now the tail */
+	skb_trim(skb, 0);
+	bcn->tail = bcn->head + bcn->head_len;
+
+	if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
+	    mesh_add_rsn_ie(sdata, skb) ||
+	    mesh_add_ht_cap_ie(sdata, skb) ||
+	    mesh_add_ht_oper_ie(sdata, skb) ||
+	    mesh_add_meshid_ie(sdata, skb) ||
+	    mesh_add_meshconf_ie(sdata, skb) ||
+	    mesh_add_awake_window_ie(sdata, skb) ||
+	    mesh_add_vendor_ies(sdata, skb))
+		goto out_free;
+
+	bcn->tail_len = skb->len;
+	memcpy(bcn->tail, skb->data, bcn->tail_len);
+
+	dev_kfree_skb(skb);
+	rcu_assign_pointer(ifmsh->beacon, bcn);
+	return 0;
+out_free:
+	kfree(bcn);
+	dev_kfree_skb(skb);
+	return -ENOMEM;
+}
+
+static int
+ieee80211_mesh_rebuild_beacon(struct ieee80211_if_mesh *ifmsh)
+{
+	struct beacon_data *old_bcn;
+	int ret;
+
+	mutex_lock(&ifmsh->mtx);
+
+	old_bcn = rcu_dereference_protected(ifmsh->beacon,
+					    lockdep_is_held(&ifmsh->mtx));
+	ret = ieee80211_mesh_build_beacon(ifmsh);
+	if (ret)
+		/* just reuse old beacon */
+		goto out;
+
+	if (old_bcn)
+		kfree_rcu(old_bcn, rcu_head);
+out:
+	mutex_unlock(&ifmsh->mtx);
+	return ret;
+}
+
+void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
+				       u32 changed)
+{
+	if (sdata->vif.bss_conf.enable_beacon &&
+	    (changed & (BSS_CHANGED_BEACON |
+			BSS_CHANGED_HT |
+			BSS_CHANGED_BASIC_RATES |
+			BSS_CHANGED_BEACON_INT)))
+		if (ieee80211_mesh_rebuild_beacon(&sdata->u.mesh))
+			return;
+	ieee80211_bss_info_change_notify(sdata, changed);
+}
+
+int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+	u32 changed = BSS_CHANGED_BEACON |
+		      BSS_CHANGED_BEACON_ENABLED |
+		      BSS_CHANGED_HT |
+		      BSS_CHANGED_BASIC_RATES |
+		      BSS_CHANGED_BEACON_INT;
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+
+	local->fif_other_bss++;
+	/* mesh ifaces must set allmulti to forward mcast traffic */
+	atomic_inc(&local->iff_allmultis);
+	ieee80211_configure_filter(local);
+
+	ifmsh->mesh_cc_id = 0;	/* Disabled */
+	ifmsh->mesh_auth_id = 0;	/* Disabled */
+	/* register sync ops from extensible synchronization framework */
+	ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
+	ifmsh->adjusting_tbtt = false;
+	ifmsh->sync_offset_clockdrift_max = 0;
+	set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
+	ieee80211_mesh_root_setup(ifmsh);
+	ieee80211_queue_work(&local->hw, &sdata->work);
+	sdata->vif.bss_conf.ht_operation_mode =
+				ifmsh->mshcfg.ht_opmode;
+	sdata->vif.bss_conf.enable_beacon = true;
+	sdata->vif.bss_conf.basic_rates =
+		ieee80211_mandatory_rates(local, band);
+
+	changed |= ieee80211_mps_local_status_update(sdata);
+
+	if (ieee80211_mesh_build_beacon(ifmsh)) {
+		ieee80211_stop_mesh(sdata);
+		return -ENOMEM;
+	}
+
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	netif_carrier_on(sdata->dev);
+	return 0;
+}
+
+void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct beacon_data *bcn;
+
+	netif_carrier_off(sdata->dev);
+
+	/* stop the beacon */
+	ifmsh->mesh_id_len = 0;
+	sdata->vif.bss_conf.enable_beacon = false;
+	clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
+	mutex_lock(&ifmsh->mtx);
+	bcn = rcu_dereference_protected(ifmsh->beacon,
+					lockdep_is_held(&ifmsh->mtx));
+	rcu_assign_pointer(ifmsh->beacon, NULL);
+	kfree_rcu(bcn, rcu_head);
+	mutex_unlock(&ifmsh->mtx);
+
+	/* flush STAs and mpaths on this iface */
+	sta_info_flush(sdata);
+	mesh_path_flush_by_iface(sdata);
+
+	/* free all potentially still buffered group-addressed frames */
+	local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
+	skb_queue_purge(&ifmsh->ps.bc_buf);
+
+	del_timer_sync(&sdata->u.mesh.housekeeping_timer);
+	del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
+	del_timer_sync(&sdata->u.mesh.mesh_path_timer);
+	/*
+	 * If the timer fired while we waited for it, it will have
+	 * requeued the work. Now the work will be running again
+	 * but will not rearm the timer again because it checks
+	 * whether the interface is running, which, at this point,
+	 * it no longer is.
+	 */
+	cancel_work_sync(&sdata->work);
+
+	local->fif_other_bss--;
+	atomic_dec(&local->iff_allmultis);
+	ieee80211_configure_filter(local);
+}
+
+static void
+ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
+			    struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct sk_buff *presp;
+	struct beacon_data *bcn;
+	struct ieee80211_mgmt *hdr;
+	struct ieee802_11_elems elems;
+	size_t baselen;
+	u8 *pos;
+
+	pos = mgmt->u.probe_req.variable;
+	baselen = (u8 *) pos - (u8 *) mgmt;
+	if (baselen > len)
+		return;
+
+	ieee802_11_parse_elems(pos, len - baselen, false, &elems);
+
+	/* 802.11-2012 10.1.4.3.2 */
+	if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
+	     !is_broadcast_ether_addr(mgmt->da)) ||
+	    elems.ssid_len != 0)
+		return;
+
+	if (elems.mesh_id_len != 0 &&
+	    (elems.mesh_id_len != ifmsh->mesh_id_len ||
+	     memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
+		return;
+
+	rcu_read_lock();
+	bcn = rcu_dereference(ifmsh->beacon);
+
+	if (!bcn)
+		goto out;
+
+	presp = dev_alloc_skb(local->tx_headroom +
+			      bcn->head_len + bcn->tail_len);
+	if (!presp)
+		goto out;
+
+	skb_reserve(presp, local->tx_headroom);
+	memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
+	memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
+	hdr = (struct ieee80211_mgmt *) presp->data;
+	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					 IEEE80211_STYPE_PROBE_RESP);
+	memcpy(hdr->da, mgmt->sa, ETH_ALEN);
+	IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	ieee80211_tx_skb(sdata, presp);
+out:
+	rcu_read_unlock();
+}
+
+static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
+					u16 stype,
+					struct ieee80211_mgmt *mgmt,
+					size_t len,
+					struct ieee80211_rx_status *rx_status)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee802_11_elems elems;
+	struct ieee80211_channel *channel;
+	size_t baselen;
+	int freq;
+	enum ieee80211_band band = rx_status->band;
+
+	/* ignore ProbeResp to foreign address */
+	if (stype == IEEE80211_STYPE_PROBE_RESP &&
+	    !ether_addr_equal(mgmt->da, sdata->vif.addr))
+		return;
+
+	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
+	if (baselen > len)
+		return;
+
+	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
+			       false, &elems);
+
+	/* ignore non-mesh or secure / unsecure mismatch */
+	if ((!elems.mesh_id || !elems.mesh_config) ||
+	    (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
+	    (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
+		return;
+
+	if (elems.ds_params)
+		freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
+	else
+		freq = rx_status->freq;
+
+	channel = ieee80211_get_channel(local->hw.wiphy, freq);
+
+	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+		return;
+
+	if (mesh_matches_local(sdata, &elems))
+		mesh_neighbour_update(sdata, mgmt->sa, &elems);
+
+	if (ifmsh->sync_ops)
+		ifmsh->sync_ops->rx_bcn_presp(sdata,
+			stype, mgmt, &elems, rx_status);
+}
+
+static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
+					  struct ieee80211_mgmt *mgmt,
+					  size_t len,
+					  struct ieee80211_rx_status *rx_status)
+{
+	switch (mgmt->u.action.category) {
+	case WLAN_CATEGORY_SELF_PROTECTED:
+		switch (mgmt->u.action.u.self_prot.action_code) {
+		case WLAN_SP_MESH_PEERING_OPEN:
+		case WLAN_SP_MESH_PEERING_CLOSE:
+		case WLAN_SP_MESH_PEERING_CONFIRM:
+			mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
+			break;
+		}
+		break;
+	case WLAN_CATEGORY_MESH_ACTION:
+		if (mesh_action_is_path_sel(mgmt))
+			mesh_rx_path_sel_frame(sdata, mgmt, len);
+		break;
+	}
+}
+
+void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				   struct sk_buff *skb)
+{
+	struct ieee80211_rx_status *rx_status;
+	struct ieee80211_mgmt *mgmt;
+	u16 stype;
+
+	rx_status = IEEE80211_SKB_RXCB(skb);
+	mgmt = (struct ieee80211_mgmt *) skb->data;
+	stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
+
+	switch (stype) {
+	case IEEE80211_STYPE_PROBE_RESP:
+	case IEEE80211_STYPE_BEACON:
+		ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
+					    rx_status);
+		break;
+	case IEEE80211_STYPE_PROBE_REQ:
+		ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_ACTION:
+		ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
+		break;
+	}
+}
+
+void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	if (ifmsh->preq_queue_len &&
+	    time_after(jiffies,
+		       ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
+		mesh_path_start_discovery(sdata);
+
+	if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
+		mesh_mpath_table_grow();
+
+	if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags))
+		mesh_mpp_table_grow();
+
+	if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
+		ieee80211_mesh_housekeeping(sdata);
+
+	if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
+		ieee80211_mesh_rootpath(sdata);
+
+	if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
+		mesh_sync_adjust_tbtt(sdata);
+}
+
+void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list)
+		if (ieee80211_vif_is_mesh(&sdata->vif) &&
+		    ieee80211_sdata_running(sdata))
+			ieee80211_queue_work(&local->hw, &sdata->work);
+	rcu_read_unlock();
+}
+
+void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	static u8 zero_addr[ETH_ALEN] = {};
+
+	setup_timer(&ifmsh->housekeeping_timer,
+		    ieee80211_mesh_housekeeping_timer,
+		    (unsigned long) sdata);
+
+	ifmsh->accepting_plinks = true;
+	ifmsh->preq_id = 0;
+	ifmsh->sn = 0;
+	ifmsh->num_gates = 0;
+	atomic_set(&ifmsh->mpaths, 0);
+	mesh_rmc_init(sdata);
+	ifmsh->last_preq = jiffies;
+	ifmsh->next_perr = jiffies;
+	/* Allocate all mesh structures when creating the first mesh interface. */
+	if (!mesh_allocated)
+		ieee80211s_init();
+	setup_timer(&ifmsh->mesh_path_timer,
+		    ieee80211_mesh_path_timer,
+		    (unsigned long) sdata);
+	setup_timer(&ifmsh->mesh_path_root_timer,
+		    ieee80211_mesh_path_root_timer,
+		    (unsigned long) sdata);
+	INIT_LIST_HEAD(&ifmsh->preq_queue.list);
+	skb_queue_head_init(&ifmsh->ps.bc_buf);
+	spin_lock_init(&ifmsh->mesh_preq_queue_lock);
+	spin_lock_init(&ifmsh->sync_offset_lock);
+	RCU_INIT_POINTER(ifmsh->beacon, NULL);
+	mutex_init(&ifmsh->mtx);
+
+	sdata->vif.bss_conf.bssid = zero_addr;
+}
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
new file mode 100644
index 0000000..5664c72
--- /dev/null
+++ b/net/mac80211/mesh.h
@@ -0,0 +1,374 @@
+/*
+ * Copyright (c) 2008, 2009 open80211s Ltd.
+ * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
+ *             Javier Cardona <javier@cozybit.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef IEEE80211S_H
+#define IEEE80211S_H
+
+#include <linux/types.h>
+#include <linux/jhash.h>
+#include "ieee80211_i.h"
+
+
+/* Data structures */
+
+/**
+ * enum mesh_path_flags - mac80211 mesh path flags
+ *
+ *
+ *
+ * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
+ * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
+ * @MESH_PATH_SN_VALID: the mesh path contains a valid destination sequence
+ *	number
+ * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
+ *	modified
+ * @MESH_PATH_RESOLVED: the mesh path can has been resolved
+ * @MESH_PATH_REQ_QUEUED: there is an unsent path request for this destination
+ *	already queued up, waiting for the discovery process to start.
+ *
+ * MESH_PATH_RESOLVED is used by the mesh path timer to
+ * decide when to stop or cancel the mesh path discovery.
+ */
+enum mesh_path_flags {
+	MESH_PATH_ACTIVE =	BIT(0),
+	MESH_PATH_RESOLVING =	BIT(1),
+	MESH_PATH_SN_VALID =	BIT(2),
+	MESH_PATH_FIXED	=	BIT(3),
+	MESH_PATH_RESOLVED =	BIT(4),
+	MESH_PATH_REQ_QUEUED =	BIT(5),
+};
+
+/**
+ * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
+ *
+ *
+ *
+ * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
+ * @MESH_WORK_GROW_MPATH_TABLE: the mesh path table is full and needs
+ * to grow.
+ * @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to
+ * grow
+ * @MESH_WORK_ROOT: the mesh root station needs to send a frame
+ * @MESH_WORK_DRIFT_ADJUST: time to compensate for clock drift relative to other
+ * mesh nodes
+ */
+enum mesh_deferred_task_flags {
+	MESH_WORK_HOUSEKEEPING,
+	MESH_WORK_GROW_MPATH_TABLE,
+	MESH_WORK_GROW_MPP_TABLE,
+	MESH_WORK_ROOT,
+	MESH_WORK_DRIFT_ADJUST,
+};
+
+/**
+ * struct mesh_path - mac80211 mesh path structure
+ *
+ * @dst: mesh path destination mac address
+ * @sdata: mesh subif
+ * @next_hop: mesh neighbor to which frames for this destination will be
+ *	forwarded
+ * @timer: mesh path discovery timer
+ * @frame_queue: pending queue for frames sent to this destination while the
+ *	path is unresolved
+ * @sn: target sequence number
+ * @metric: current metric to this destination
+ * @hop_count: hops to destination
+ * @exp_time: in jiffies, when the path will expire or when it expired
+ * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
+ *	retry
+ * @discovery_retries: number of discovery retries
+ * @flags: mesh path flags, as specified on &enum mesh_path_flags
+ * @state_lock: mesh path state lock used to protect changes to the
+ * mpath itself.  No need to take this lock when adding or removing
+ * an mpath to a hash bucket on a path table.
+ * @rann_snd_addr: the RANN sender address
+ * @rann_metric: the aggregated path metric towards the root node
+ * @last_preq_to_root: Timestamp of last PREQ sent to root
+ * @is_root: the destination station of this path is a root node
+ * @is_gate: the destination station of this path is a mesh gate
+ *
+ *
+ * The combination of dst and sdata is unique in the mesh path table. Since the
+ * next_hop STA is only protected by RCU as well, deleting the STA must also
+ * remove/substitute the mesh_path structure and wait until that is no longer
+ * reachable before destroying the STA completely.
+ */
+struct mesh_path {
+	u8 dst[ETH_ALEN];
+	u8 mpp[ETH_ALEN];	/* used for MPP or MAP */
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info __rcu *next_hop;
+	struct timer_list timer;
+	struct sk_buff_head frame_queue;
+	struct rcu_head rcu;
+	u32 sn;
+	u32 metric;
+	u8 hop_count;
+	unsigned long exp_time;
+	u32 discovery_timeout;
+	u8 discovery_retries;
+	enum mesh_path_flags flags;
+	spinlock_t state_lock;
+	u8 rann_snd_addr[ETH_ALEN];
+	u32 rann_metric;
+	unsigned long last_preq_to_root;
+	bool is_root;
+	bool is_gate;
+};
+
+/**
+ * struct mesh_table
+ *
+ * @hash_buckets: array of hash buckets of the table
+ * @hashwlock: array of locks to protect write operations, one per bucket
+ * @hash_mask: 2^size_order - 1, used to compute hash idx
+ * @hash_rnd: random value used for hash computations
+ * @entries: number of entries in the table
+ * @free_node: function to free nodes of the table
+ * @copy_node: function to copy nodes of the table
+ * @size_order: determines size of the table, there will be 2^size_order hash
+ *	buckets
+ * @mean_chain_len: maximum average length for the hash buckets' list, if it is
+ *	reached, the table will grow
+ * @known_gates: list of known mesh gates and their mpaths by the station. The
+ * gate's mpath may or may not be resolved and active.
+ *
+ * rcu_head: RCU head to free the table
+ */
+struct mesh_table {
+	/* Number of buckets will be 2^N */
+	struct hlist_head *hash_buckets;
+	spinlock_t *hashwlock;		/* One per bucket, for add/del */
+	unsigned int hash_mask;		/* (2^size_order) - 1 */
+	__u32 hash_rnd;			/* Used for hash generation */
+	atomic_t entries;		/* Up to MAX_MESH_NEIGHBOURS */
+	void (*free_node) (struct hlist_node *p, bool free_leafs);
+	int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
+	int size_order;
+	int mean_chain_len;
+	struct hlist_head *known_gates;
+	spinlock_t gates_lock;
+
+	struct rcu_head rcu_head;
+};
+
+/* Recent multicast cache */
+/* RMC_BUCKETS must be a power of 2, maximum 256 */
+#define RMC_BUCKETS		256
+#define RMC_QUEUE_MAX_LEN	4
+#define RMC_TIMEOUT		(3 * HZ)
+
+/**
+ * struct rmc_entry - entry in the Recent Multicast Cache
+ *
+ * @seqnum: mesh sequence number of the frame
+ * @exp_time: expiration time of the entry, in jiffies
+ * @sa: source address of the frame
+ *
+ * The Recent Multicast Cache keeps track of the latest multicast frames that
+ * have been received by a mesh interface and discards received multicast frames
+ * that are found in the cache.
+ */
+struct rmc_entry {
+	struct list_head list;
+	u32 seqnum;
+	unsigned long exp_time;
+	u8 sa[ETH_ALEN];
+};
+
+struct mesh_rmc {
+	struct list_head bucket[RMC_BUCKETS];
+	u32 idx_mask;
+};
+
+#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
+#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
+
+#define MESH_PATH_EXPIRE (600 * HZ)
+
+/* Default maximum number of plinks per interface */
+#define MESH_MAX_PLINKS		256
+
+/* Maximum number of paths per interface */
+#define MESH_MAX_MPATHS		1024
+
+/* Number of frames buffered per destination for unresolved destinations */
+#define MESH_FRAME_QUEUE_LEN	10
+
+/* Public interfaces */
+/* Various */
+int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
+				  const u8 *da, const u8 *sa);
+int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
+			      struct ieee80211s_hdr *meshhdr,
+			      const char *addr4or5, const char *addr6);
+int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
+		   const u8 *addr, struct ieee80211s_hdr *mesh_hdr);
+bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
+			struct ieee802_11_elems *ie);
+void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
+void mesh_mgmt_ies_add(struct ieee80211_sub_if_data *sdata,
+		       struct sk_buff *skb);
+int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
+			 struct sk_buff *skb);
+int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata,
+		       struct sk_buff *skb);
+int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata,
+		    struct sk_buff *skb);
+int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
+			struct sk_buff *skb);
+int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
+		       struct sk_buff *skb);
+int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
+			struct sk_buff *skb);
+void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
+int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
+void ieee80211s_init(void);
+void ieee80211s_update_metric(struct ieee80211_local *local,
+			      struct sta_info *sta, struct sk_buff *skb);
+void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
+int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
+void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
+void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh);
+const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method);
+/* wrapper for ieee80211_bss_info_change_notify() */
+void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
+				       u32 changed);
+
+/* mesh power save */
+u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata);
+u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
+				   enum nl80211_mesh_power_mode pm);
+void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
+				   struct sta_info *sta,
+				   struct ieee80211_hdr *hdr);
+void ieee80211_mps_sta_status_update(struct sta_info *sta);
+void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
+				    struct ieee80211_hdr *hdr);
+void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
+				    bool tx, bool acked);
+void ieee80211_mps_frame_release(struct sta_info *sta,
+				 struct ieee802_11_elems *elems);
+
+/* Mesh paths */
+int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
+			struct sk_buff *skb);
+int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
+			 struct sk_buff *skb);
+void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
+struct mesh_path *mesh_path_lookup(struct ieee80211_sub_if_data *sdata,
+				   const u8 *dst);
+struct mesh_path *mpp_path_lookup(struct ieee80211_sub_if_data *sdata,
+				  const u8 *dst);
+int mpp_path_add(struct ieee80211_sub_if_data *sdata,
+		 const u8 *dst, const u8 *mpp);
+struct mesh_path *
+mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx);
+void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
+void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
+void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
+			    struct ieee80211_mgmt *mgmt, size_t len);
+struct mesh_path *
+mesh_path_add(struct ieee80211_sub_if_data *sdata, const u8 *dst);
+
+int mesh_path_add_gate(struct mesh_path *mpath);
+int mesh_path_send_to_gates(struct mesh_path *mpath);
+int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
+
+/* Mesh plinks */
+void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
+			   u8 *hw_addr, struct ieee802_11_elems *ie);
+bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
+u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
+void mesh_plink_broken(struct sta_info *sta);
+u32 mesh_plink_deactivate(struct sta_info *sta);
+u32 mesh_plink_open(struct sta_info *sta);
+u32 mesh_plink_block(struct sta_info *sta);
+void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
+			 struct ieee80211_mgmt *mgmt, size_t len,
+			 struct ieee80211_rx_status *rx_status);
+void mesh_sta_cleanup(struct sta_info *sta);
+
+/* Private interfaces */
+/* Mesh tables */
+void mesh_mpath_table_grow(void);
+void mesh_mpp_table_grow(void);
+/* Mesh paths */
+int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
+		       u8 ttl, const u8 *target, __le32 target_sn,
+		       __le16 target_rcode, const u8 *ra);
+void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
+void mesh_path_flush_pending(struct mesh_path *mpath);
+void mesh_path_tx_pending(struct mesh_path *mpath);
+int mesh_pathtbl_init(void);
+void mesh_pathtbl_unregister(void);
+int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
+void mesh_path_timer(unsigned long data);
+void mesh_path_flush_by_nexthop(struct sta_info *sta);
+void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
+			     struct sk_buff *skb);
+void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
+
+bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
+extern int mesh_paths_generation;
+
+#ifdef CPTCFG_MAC80211_MESH
+static inline
+u32 mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
+{
+	atomic_inc(&sdata->u.mesh.estab_plinks);
+	return mesh_accept_plinks_update(sdata);
+}
+
+static inline
+u32 mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
+{
+	atomic_dec(&sdata->u.mesh.estab_plinks);
+	return mesh_accept_plinks_update(sdata);
+}
+
+static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
+{
+	return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
+	       atomic_read(&sdata->u.mesh.estab_plinks);
+}
+
+static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
+{
+	return (min_t(long, mesh_plink_free_count(sdata),
+		   MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
+}
+
+static inline void mesh_path_activate(struct mesh_path *mpath)
+{
+	mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
+}
+
+static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
+{
+	return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
+}
+
+void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
+
+void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
+void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
+void ieee80211s_stop(void);
+#else
+static inline void
+ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
+static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
+{ return false; }
+static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
+{}
+static inline void ieee80211s_stop(void) {}
+#endif
+
+#endif /* IEEE80211S_H */
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
new file mode 100644
index 0000000..486819c
--- /dev/null
+++ b/net/mac80211/mesh_hwmp.c
@@ -0,0 +1,1237 @@
+/*
+ * Copyright (c) 2008, 2009 open80211s Ltd.
+ * Author:     Luis Carlos Cobo <luisca@cozybit.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/slab.h>
+#include <linux/etherdevice.h>
+#include <asm/unaligned.h>
+#include "wme.h"
+#include "mesh.h"
+
+#define TEST_FRAME_LEN	8192
+#define MAX_METRIC	0xffffffff
+#define ARITH_SHIFT	8
+
+#define MAX_PREQ_QUEUE_LEN	64
+
+/* Destination only */
+#define MP_F_DO	0x1
+/* Reply and forward */
+#define MP_F_RF	0x2
+/* Unknown Sequence Number */
+#define MP_F_USN    0x01
+/* Reason code Present */
+#define MP_F_RCODE  0x02
+
+static void mesh_queue_preq(struct mesh_path *, u8);
+
+static inline u32 u32_field_get(const u8 *preq_elem, int offset, bool ae)
+{
+	if (ae)
+		offset += 6;
+	return get_unaligned_le32(preq_elem + offset);
+}
+
+static inline u32 u16_field_get(const u8 *preq_elem, int offset, bool ae)
+{
+	if (ae)
+		offset += 6;
+	return get_unaligned_le16(preq_elem + offset);
+}
+
+/* HWMP IE processing macros */
+#define AE_F			(1<<6)
+#define AE_F_SET(x)		(*x & AE_F)
+#define PREQ_IE_FLAGS(x)	(*(x))
+#define PREQ_IE_HOPCOUNT(x)	(*(x + 1))
+#define PREQ_IE_TTL(x)		(*(x + 2))
+#define PREQ_IE_PREQ_ID(x)	u32_field_get(x, 3, 0)
+#define PREQ_IE_ORIG_ADDR(x)	(x + 7)
+#define PREQ_IE_ORIG_SN(x)	u32_field_get(x, 13, 0)
+#define PREQ_IE_LIFETIME(x)	u32_field_get(x, 17, AE_F_SET(x))
+#define PREQ_IE_METRIC(x) 	u32_field_get(x, 21, AE_F_SET(x))
+#define PREQ_IE_TARGET_F(x)	(*(AE_F_SET(x) ? x + 32 : x + 26))
+#define PREQ_IE_TARGET_ADDR(x) 	(AE_F_SET(x) ? x + 33 : x + 27)
+#define PREQ_IE_TARGET_SN(x) 	u32_field_get(x, 33, AE_F_SET(x))
+
+
+#define PREP_IE_FLAGS(x)	PREQ_IE_FLAGS(x)
+#define PREP_IE_HOPCOUNT(x)	PREQ_IE_HOPCOUNT(x)
+#define PREP_IE_TTL(x)		PREQ_IE_TTL(x)
+#define PREP_IE_ORIG_ADDR(x)	(AE_F_SET(x) ? x + 27 : x + 21)
+#define PREP_IE_ORIG_SN(x)	u32_field_get(x, 27, AE_F_SET(x))
+#define PREP_IE_LIFETIME(x)	u32_field_get(x, 13, AE_F_SET(x))
+#define PREP_IE_METRIC(x)	u32_field_get(x, 17, AE_F_SET(x))
+#define PREP_IE_TARGET_ADDR(x)	(x + 3)
+#define PREP_IE_TARGET_SN(x)	u32_field_get(x, 9, 0)
+
+#define PERR_IE_TTL(x)		(*(x))
+#define PERR_IE_TARGET_FLAGS(x)	(*(x + 2))
+#define PERR_IE_TARGET_ADDR(x)	(x + 3)
+#define PERR_IE_TARGET_SN(x)	u32_field_get(x, 9, 0)
+#define PERR_IE_TARGET_RCODE(x)	u16_field_get(x, 13, 0)
+
+#define MSEC_TO_TU(x) (x*1000/1024)
+#define SN_GT(x, y) ((s32)(y - x) < 0)
+#define SN_LT(x, y) ((s32)(x - y) < 0)
+
+#define net_traversal_jiffies(s) \
+	msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime)
+#define default_lifetime(s) \
+	MSEC_TO_TU(s->u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout)
+#define min_preq_int_jiff(s) \
+	(msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval))
+#define max_preq_retries(s) (s->u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries)
+#define disc_timeout_jiff(s) \
+	msecs_to_jiffies(sdata->u.mesh.mshcfg.min_discovery_timeout)
+#define root_path_confirmation_jiffies(s) \
+	msecs_to_jiffies(sdata->u.mesh.mshcfg.dot11MeshHWMPconfirmationInterval)
+
+enum mpath_frame_type {
+	MPATH_PREQ = 0,
+	MPATH_PREP,
+	MPATH_PERR,
+	MPATH_RANN
+};
+
+static const u8 broadcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+
+static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
+				  const u8 *orig_addr, __le32 orig_sn,
+				  u8 target_flags, const u8 *target,
+				  __le32 target_sn, const u8 *da,
+				  u8 hop_count, u8 ttl,
+				  __le32 lifetime, __le32 metric,
+				  __le32 preq_id,
+				  struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	u8 *pos, ie_len;
+	int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.mesh_action) +
+		      sizeof(mgmt->u.action.u.mesh_action);
+
+	skb = dev_alloc_skb(local->tx_headroom +
+			    hdr_len +
+			    2 + 37); /* max HWMP IE */
+	if (!skb)
+		return -1;
+	skb_reserve(skb, local->tx_headroom);
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
+	memset(mgmt, 0, hdr_len);
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+
+	memcpy(mgmt->da, da, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	/* BSSID == SA */
+	memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
+	mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION;
+	mgmt->u.action.u.mesh_action.action_code =
+					WLAN_MESH_ACTION_HWMP_PATH_SELECTION;
+
+	switch (action) {
+	case MPATH_PREQ:
+		mhwmp_dbg(sdata, "sending PREQ to %pM\n", target);
+		ie_len = 37;
+		pos = skb_put(skb, 2 + ie_len);
+		*pos++ = WLAN_EID_PREQ;
+		break;
+	case MPATH_PREP:
+		mhwmp_dbg(sdata, "sending PREP to %pM\n", orig_addr);
+		ie_len = 31;
+		pos = skb_put(skb, 2 + ie_len);
+		*pos++ = WLAN_EID_PREP;
+		break;
+	case MPATH_RANN:
+		mhwmp_dbg(sdata, "sending RANN from %pM\n", orig_addr);
+		ie_len = sizeof(struct ieee80211_rann_ie);
+		pos = skb_put(skb, 2 + ie_len);
+		*pos++ = WLAN_EID_RANN;
+		break;
+	default:
+		kfree_skb(skb);
+		return -ENOTSUPP;
+		break;
+	}
+	*pos++ = ie_len;
+	*pos++ = flags;
+	*pos++ = hop_count;
+	*pos++ = ttl;
+	if (action == MPATH_PREP) {
+		memcpy(pos, target, ETH_ALEN);
+		pos += ETH_ALEN;
+		memcpy(pos, &target_sn, 4);
+		pos += 4;
+	} else {
+		if (action == MPATH_PREQ) {
+			memcpy(pos, &preq_id, 4);
+			pos += 4;
+		}
+		memcpy(pos, orig_addr, ETH_ALEN);
+		pos += ETH_ALEN;
+		memcpy(pos, &orig_sn, 4);
+		pos += 4;
+	}
+	memcpy(pos, &lifetime, 4);	/* interval for RANN */
+	pos += 4;
+	memcpy(pos, &metric, 4);
+	pos += 4;
+	if (action == MPATH_PREQ) {
+		*pos++ = 1; /* destination count */
+		*pos++ = target_flags;
+		memcpy(pos, target, ETH_ALEN);
+		pos += ETH_ALEN;
+		memcpy(pos, &target_sn, 4);
+		pos += 4;
+	} else if (action == MPATH_PREP) {
+		memcpy(pos, orig_addr, ETH_ALEN);
+		pos += ETH_ALEN;
+		memcpy(pos, &orig_sn, 4);
+		pos += 4;
+	}
+
+	ieee80211_tx_skb(sdata, skb);
+	return 0;
+}
+
+
+/*  Headroom is not adjusted.  Caller should ensure that skb has sufficient
+ *  headroom in case the frame is encrypted. */
+static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata,
+		struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+
+	skb_set_mac_header(skb, 0);
+	skb_set_network_header(skb, 0);
+	skb_set_transport_header(skb, 0);
+
+	/* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
+	skb_set_queue_mapping(skb, IEEE80211_AC_VO);
+	skb->priority = 7;
+
+	info->control.vif = &sdata->vif;
+	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+	ieee80211_set_qos_hdr(sdata, skb);
+	ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
+}
+
+/**
+ * mesh_path_error_tx - Sends a PERR mesh management frame
+ *
+ * @ttl: allowed remaining hops
+ * @target: broken destination
+ * @target_sn: SN of the broken destination
+ * @target_rcode: reason code for this PERR
+ * @ra: node this frame is addressed to
+ * @sdata: local mesh subif
+ *
+ * Note: This function may be called with driver locks taken that the driver
+ * also acquires in the TX path.  To avoid a deadlock we don't transmit the
+ * frame directly but add it to the pending queue instead.
+ */
+int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
+		       u8 ttl, const u8 *target, __le32 target_sn,
+		       __le16 target_rcode, const u8 *ra)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_mgmt *mgmt;
+	u8 *pos, ie_len;
+	int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.mesh_action) +
+		      sizeof(mgmt->u.action.u.mesh_action);
+
+	if (time_before(jiffies, ifmsh->next_perr))
+		return -EAGAIN;
+
+	skb = dev_alloc_skb(local->tx_headroom +
+			    IEEE80211_ENCRYPT_HEADROOM +
+			    IEEE80211_ENCRYPT_TAILROOM +
+			    hdr_len +
+			    2 + 15 /* PERR IE */);
+	if (!skb)
+		return -1;
+	skb_reserve(skb, local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM);
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
+	memset(mgmt, 0, hdr_len);
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+
+	memcpy(mgmt->da, ra, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	/* BSSID == SA */
+	memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
+	mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION;
+	mgmt->u.action.u.mesh_action.action_code =
+					WLAN_MESH_ACTION_HWMP_PATH_SELECTION;
+	ie_len = 15;
+	pos = skb_put(skb, 2 + ie_len);
+	*pos++ = WLAN_EID_PERR;
+	*pos++ = ie_len;
+	/* ttl */
+	*pos++ = ttl;
+	/* number of destinations */
+	*pos++ = 1;
+	/*
+	 * flags bit, bit 1 is unset if we know the sequence number and
+	 * bit 2 is set if we have a reason code
+	 */
+	*pos = 0;
+	if (!target_sn)
+		*pos |= MP_F_USN;
+	if (target_rcode)
+		*pos |= MP_F_RCODE;
+	pos++;
+	memcpy(pos, target, ETH_ALEN);
+	pos += ETH_ALEN;
+	memcpy(pos, &target_sn, 4);
+	pos += 4;
+	memcpy(pos, &target_rcode, 2);
+
+	/* see note in function header */
+	prepare_frame_for_deferred_tx(sdata, skb);
+	ifmsh->next_perr = TU_TO_EXP_TIME(
+				   ifmsh->mshcfg.dot11MeshHWMPperrMinInterval);
+	ieee80211_add_pending_skb(local, skb);
+	return 0;
+}
+
+void ieee80211s_update_metric(struct ieee80211_local *local,
+		struct sta_info *sta, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	int failed;
+
+	if (!ieee80211_is_data(hdr->frame_control))
+		return;
+
+	failed = !(txinfo->flags & IEEE80211_TX_STAT_ACK);
+
+	/* moving average, scaled to 100 */
+	sta->fail_avg = ((80 * sta->fail_avg + 5) / 100 + 20 * failed);
+	if (sta->fail_avg > 95)
+		mesh_plink_broken(sta);
+}
+
+static u32 airtime_link_metric_get(struct ieee80211_local *local,
+				   struct sta_info *sta)
+{
+	struct rate_info rinfo;
+	/* This should be adjusted for each device */
+	int device_constant = 1 << ARITH_SHIFT;
+	int test_frame_len = TEST_FRAME_LEN << ARITH_SHIFT;
+	int s_unit = 1 << ARITH_SHIFT;
+	int rate, err;
+	u32 tx_time, estimated_retx;
+	u64 result;
+
+	if (sta->fail_avg >= 100)
+		return MAX_METRIC;
+
+	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
+	rate = cfg80211_calculate_bitrate(&rinfo);
+	if (WARN_ON(!rate))
+		return MAX_METRIC;
+
+	err = (sta->fail_avg << ARITH_SHIFT) / 100;
+
+	/* bitrate is in units of 100 Kbps, while we need rate in units of
+	 * 1Mbps. This will be corrected on tx_time computation.
+	 */
+	tx_time = (device_constant + 10 * test_frame_len / rate);
+	estimated_retx = ((1 << (2 * ARITH_SHIFT)) / (s_unit - err));
+	result = (tx_time * estimated_retx) >> (2 * ARITH_SHIFT) ;
+	return (u32)result;
+}
+
+/**
+ * hwmp_route_info_get - Update routing info to originator and transmitter
+ *
+ * @sdata: local mesh subif
+ * @mgmt: mesh management frame
+ * @hwmp_ie: hwmp information element (PREP or PREQ)
+ * @action: type of hwmp ie
+ *
+ * This function updates the path routing information to the originator and the
+ * transmitter of a HWMP PREQ or PREP frame.
+ *
+ * Returns: metric to frame originator or 0 if the frame should not be further
+ * processed
+ *
+ * Notes: this function is the only place (besides user-provided info) where
+ * path routing information is updated.
+ */
+static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
+			       struct ieee80211_mgmt *mgmt,
+			       const u8 *hwmp_ie, enum mpath_frame_type action)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct mesh_path *mpath;
+	struct sta_info *sta;
+	bool fresh_info;
+	const u8 *orig_addr, *ta;
+	u32 orig_sn, orig_metric;
+	unsigned long orig_lifetime, exp_time;
+	u32 last_hop_metric, new_metric;
+	bool process = true;
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, mgmt->sa);
+	if (!sta) {
+		rcu_read_unlock();
+		return 0;
+	}
+
+	last_hop_metric = airtime_link_metric_get(local, sta);
+	/* Update and check originator routing info */
+	fresh_info = true;
+
+	switch (action) {
+	case MPATH_PREQ:
+		orig_addr = PREQ_IE_ORIG_ADDR(hwmp_ie);
+		orig_sn = PREQ_IE_ORIG_SN(hwmp_ie);
+		orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie);
+		orig_metric = PREQ_IE_METRIC(hwmp_ie);
+		break;
+	case MPATH_PREP:
+		/* Originator here refers to the MP that was the target in the
+		 * Path Request. We divert from the nomenclature in the draft
+		 * so that we can easily use a single function to gather path
+		 * information from both PREQ and PREP frames.
+		 */
+		orig_addr = PREP_IE_TARGET_ADDR(hwmp_ie);
+		orig_sn = PREP_IE_TARGET_SN(hwmp_ie);
+		orig_lifetime = PREP_IE_LIFETIME(hwmp_ie);
+		orig_metric = PREP_IE_METRIC(hwmp_ie);
+		break;
+	default:
+		rcu_read_unlock();
+		return 0;
+	}
+	new_metric = orig_metric + last_hop_metric;
+	if (new_metric < orig_metric)
+		new_metric = MAX_METRIC;
+	exp_time = TU_TO_EXP_TIME(orig_lifetime);
+
+	if (ether_addr_equal(orig_addr, sdata->vif.addr)) {
+		/* This MP is the originator, we are not interested in this
+		 * frame, except for updating transmitter's path info.
+		 */
+		process = false;
+		fresh_info = false;
+	} else {
+		mpath = mesh_path_lookup(sdata, orig_addr);
+		if (mpath) {
+			spin_lock_bh(&mpath->state_lock);
+			if (mpath->flags & MESH_PATH_FIXED)
+				fresh_info = false;
+			else if ((mpath->flags & MESH_PATH_ACTIVE) &&
+			    (mpath->flags & MESH_PATH_SN_VALID)) {
+				if (SN_GT(mpath->sn, orig_sn) ||
+				    (mpath->sn == orig_sn &&
+				     new_metric >= mpath->metric)) {
+					process = false;
+					fresh_info = false;
+				}
+			}
+		} else {
+			mpath = mesh_path_add(sdata, orig_addr);
+			if (IS_ERR(mpath)) {
+				rcu_read_unlock();
+				return 0;
+			}
+			spin_lock_bh(&mpath->state_lock);
+		}
+
+		if (fresh_info) {
+			mesh_path_assign_nexthop(mpath, sta);
+			mpath->flags |= MESH_PATH_SN_VALID;
+			mpath->metric = new_metric;
+			mpath->sn = orig_sn;
+			mpath->exp_time = time_after(mpath->exp_time, exp_time)
+					  ?  mpath->exp_time : exp_time;
+			mesh_path_activate(mpath);
+			spin_unlock_bh(&mpath->state_lock);
+			mesh_path_tx_pending(mpath);
+			/* draft says preq_id should be saved to, but there does
+			 * not seem to be any use for it, skipping by now
+			 */
+		} else
+			spin_unlock_bh(&mpath->state_lock);
+	}
+
+	/* Update and check transmitter routing info */
+	ta = mgmt->sa;
+	if (ether_addr_equal(orig_addr, ta))
+		fresh_info = false;
+	else {
+		fresh_info = true;
+
+		mpath = mesh_path_lookup(sdata, ta);
+		if (mpath) {
+			spin_lock_bh(&mpath->state_lock);
+			if ((mpath->flags & MESH_PATH_FIXED) ||
+				((mpath->flags & MESH_PATH_ACTIVE) &&
+					(last_hop_metric > mpath->metric)))
+				fresh_info = false;
+		} else {
+			mpath = mesh_path_add(sdata, ta);
+			if (IS_ERR(mpath)) {
+				rcu_read_unlock();
+				return 0;
+			}
+			spin_lock_bh(&mpath->state_lock);
+		}
+
+		if (fresh_info) {
+			mesh_path_assign_nexthop(mpath, sta);
+			mpath->metric = last_hop_metric;
+			mpath->exp_time = time_after(mpath->exp_time, exp_time)
+					  ?  mpath->exp_time : exp_time;
+			mesh_path_activate(mpath);
+			spin_unlock_bh(&mpath->state_lock);
+			mesh_path_tx_pending(mpath);
+		} else
+			spin_unlock_bh(&mpath->state_lock);
+	}
+
+	rcu_read_unlock();
+
+	return process ? new_metric : 0;
+}
+
+static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_mgmt *mgmt,
+				    const u8 *preq_elem, u32 metric)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct mesh_path *mpath = NULL;
+	const u8 *target_addr, *orig_addr;
+	const u8 *da;
+	u8 target_flags, ttl, flags;
+	u32 orig_sn, target_sn, lifetime, orig_metric;
+	bool reply = false;
+	bool forward = true;
+	bool root_is_gate;
+
+	/* Update target SN, if present */
+	target_addr = PREQ_IE_TARGET_ADDR(preq_elem);
+	orig_addr = PREQ_IE_ORIG_ADDR(preq_elem);
+	target_sn = PREQ_IE_TARGET_SN(preq_elem);
+	orig_sn = PREQ_IE_ORIG_SN(preq_elem);
+	target_flags = PREQ_IE_TARGET_F(preq_elem);
+	orig_metric = metric;
+	/* Proactive PREQ gate announcements */
+	flags = PREQ_IE_FLAGS(preq_elem);
+	root_is_gate = !!(flags & RANN_FLAG_IS_GATE);
+
+	mhwmp_dbg(sdata, "received PREQ from %pM\n", orig_addr);
+
+	if (ether_addr_equal(target_addr, sdata->vif.addr)) {
+		mhwmp_dbg(sdata, "PREQ is for us\n");
+		forward = false;
+		reply = true;
+		metric = 0;
+		if (time_after(jiffies, ifmsh->last_sn_update +
+					net_traversal_jiffies(sdata)) ||
+		    time_before(jiffies, ifmsh->last_sn_update)) {
+			target_sn = ++ifmsh->sn;
+			ifmsh->last_sn_update = jiffies;
+		}
+	} else if (is_broadcast_ether_addr(target_addr) &&
+		   (target_flags & IEEE80211_PREQ_TO_FLAG)) {
+		rcu_read_lock();
+		mpath = mesh_path_lookup(sdata, orig_addr);
+		if (mpath) {
+			if (flags & IEEE80211_PREQ_PROACTIVE_PREP_FLAG) {
+				reply = true;
+				target_addr = sdata->vif.addr;
+				target_sn = ++ifmsh->sn;
+				metric = 0;
+				ifmsh->last_sn_update = jiffies;
+			}
+			if (root_is_gate)
+				mesh_path_add_gate(mpath);
+		}
+		rcu_read_unlock();
+	} else {
+		rcu_read_lock();
+		mpath = mesh_path_lookup(sdata, target_addr);
+		if (mpath) {
+			if ((!(mpath->flags & MESH_PATH_SN_VALID)) ||
+					SN_LT(mpath->sn, target_sn)) {
+				mpath->sn = target_sn;
+				mpath->flags |= MESH_PATH_SN_VALID;
+			} else if ((!(target_flags & MP_F_DO)) &&
+					(mpath->flags & MESH_PATH_ACTIVE)) {
+				reply = true;
+				metric = mpath->metric;
+				target_sn = mpath->sn;
+				if (target_flags & MP_F_RF)
+					target_flags |= MP_F_DO;
+				else
+					forward = false;
+			}
+		}
+		rcu_read_unlock();
+	}
+
+	if (reply) {
+		lifetime = PREQ_IE_LIFETIME(preq_elem);
+		ttl = ifmsh->mshcfg.element_ttl;
+		if (ttl != 0) {
+			mhwmp_dbg(sdata, "replying to the PREQ\n");
+			mesh_path_sel_frame_tx(MPATH_PREP, 0, orig_addr,
+				cpu_to_le32(orig_sn), 0, target_addr,
+				cpu_to_le32(target_sn), mgmt->sa, 0, ttl,
+				cpu_to_le32(lifetime), cpu_to_le32(metric),
+				0, sdata);
+		} else {
+			ifmsh->mshstats.dropped_frames_ttl++;
+		}
+	}
+
+	if (forward && ifmsh->mshcfg.dot11MeshForwarding) {
+		u32 preq_id;
+		u8 hopcount;
+
+		ttl = PREQ_IE_TTL(preq_elem);
+		lifetime = PREQ_IE_LIFETIME(preq_elem);
+		if (ttl <= 1) {
+			ifmsh->mshstats.dropped_frames_ttl++;
+			return;
+		}
+		mhwmp_dbg(sdata, "forwarding the PREQ from %pM\n", orig_addr);
+		--ttl;
+		preq_id = PREQ_IE_PREQ_ID(preq_elem);
+		hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1;
+		da = (mpath && mpath->is_root) ?
+			mpath->rann_snd_addr : broadcast_addr;
+
+		if (flags & IEEE80211_PREQ_PROACTIVE_PREP_FLAG) {
+			target_addr = PREQ_IE_TARGET_ADDR(preq_elem);
+			target_sn = PREQ_IE_TARGET_SN(preq_elem);
+			metric = orig_metric;
+		}
+
+		mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr,
+				cpu_to_le32(orig_sn), target_flags, target_addr,
+				cpu_to_le32(target_sn), da,
+				hopcount, ttl, cpu_to_le32(lifetime),
+				cpu_to_le32(metric), cpu_to_le32(preq_id),
+				sdata);
+		if (!is_multicast_ether_addr(da))
+			ifmsh->mshstats.fwded_unicast++;
+		else
+			ifmsh->mshstats.fwded_mcast++;
+		ifmsh->mshstats.fwded_frames++;
+	}
+}
+
+
+static inline struct sta_info *
+next_hop_deref_protected(struct mesh_path *mpath)
+{
+	return rcu_dereference_protected(mpath->next_hop,
+					 lockdep_is_held(&mpath->state_lock));
+}
+
+
+static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_mgmt *mgmt,
+				    const u8 *prep_elem, u32 metric)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct mesh_path *mpath;
+	const u8 *target_addr, *orig_addr;
+	u8 ttl, hopcount, flags;
+	u8 next_hop[ETH_ALEN];
+	u32 target_sn, orig_sn, lifetime;
+
+	mhwmp_dbg(sdata, "received PREP from %pM\n",
+		  PREP_IE_TARGET_ADDR(prep_elem));
+
+	orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
+	if (ether_addr_equal(orig_addr, sdata->vif.addr))
+		/* destination, no forwarding required */
+		return;
+
+	if (!ifmsh->mshcfg.dot11MeshForwarding)
+		return;
+
+	ttl = PREP_IE_TTL(prep_elem);
+	if (ttl <= 1) {
+		sdata->u.mesh.mshstats.dropped_frames_ttl++;
+		return;
+	}
+
+	rcu_read_lock();
+	mpath = mesh_path_lookup(sdata, orig_addr);
+	if (mpath)
+		spin_lock_bh(&mpath->state_lock);
+	else
+		goto fail;
+	if (!(mpath->flags & MESH_PATH_ACTIVE)) {
+		spin_unlock_bh(&mpath->state_lock);
+		goto fail;
+	}
+	memcpy(next_hop, next_hop_deref_protected(mpath)->sta.addr, ETH_ALEN);
+	spin_unlock_bh(&mpath->state_lock);
+	--ttl;
+	flags = PREP_IE_FLAGS(prep_elem);
+	lifetime = PREP_IE_LIFETIME(prep_elem);
+	hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1;
+	target_addr = PREP_IE_TARGET_ADDR(prep_elem);
+	target_sn = PREP_IE_TARGET_SN(prep_elem);
+	orig_sn = PREP_IE_ORIG_SN(prep_elem);
+
+	mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr,
+		cpu_to_le32(orig_sn), 0, target_addr,
+		cpu_to_le32(target_sn), next_hop, hopcount,
+		ttl, cpu_to_le32(lifetime), cpu_to_le32(metric),
+		0, sdata);
+	rcu_read_unlock();
+
+	sdata->u.mesh.mshstats.fwded_unicast++;
+	sdata->u.mesh.mshstats.fwded_frames++;
+	return;
+
+fail:
+	rcu_read_unlock();
+	sdata->u.mesh.mshstats.dropped_frames_no_route++;
+}
+
+static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_mgmt *mgmt,
+				    const u8 *perr_elem)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct mesh_path *mpath;
+	u8 ttl;
+	const u8 *ta, *target_addr;
+	u32 target_sn;
+	u16 target_rcode;
+
+	ta = mgmt->sa;
+	ttl = PERR_IE_TTL(perr_elem);
+	if (ttl <= 1) {
+		ifmsh->mshstats.dropped_frames_ttl++;
+		return;
+	}
+	ttl--;
+	target_addr = PERR_IE_TARGET_ADDR(perr_elem);
+	target_sn = PERR_IE_TARGET_SN(perr_elem);
+	target_rcode = PERR_IE_TARGET_RCODE(perr_elem);
+
+	rcu_read_lock();
+	mpath = mesh_path_lookup(sdata, target_addr);
+	if (mpath) {
+		struct sta_info *sta;
+
+		spin_lock_bh(&mpath->state_lock);
+		sta = next_hop_deref_protected(mpath);
+		if (mpath->flags & MESH_PATH_ACTIVE &&
+		    ether_addr_equal(ta, sta->sta.addr) &&
+		    (!(mpath->flags & MESH_PATH_SN_VALID) ||
+		    SN_GT(target_sn, mpath->sn))) {
+			mpath->flags &= ~MESH_PATH_ACTIVE;
+			mpath->sn = target_sn;
+			spin_unlock_bh(&mpath->state_lock);
+			if (!ifmsh->mshcfg.dot11MeshForwarding)
+				goto endperr;
+			mesh_path_error_tx(sdata, ttl, target_addr,
+					   cpu_to_le32(target_sn),
+					   cpu_to_le16(target_rcode),
+					   broadcast_addr);
+		} else
+			spin_unlock_bh(&mpath->state_lock);
+	}
+endperr:
+	rcu_read_unlock();
+}
+
+static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_mgmt *mgmt,
+				    const struct ieee80211_rann_ie *rann)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	struct mesh_path *mpath;
+	u8 ttl, flags, hopcount;
+	const u8 *orig_addr;
+	u32 orig_sn, metric, metric_txsta, interval;
+	bool root_is_gate;
+
+	ttl = rann->rann_ttl;
+	flags = rann->rann_flags;
+	root_is_gate = !!(flags & RANN_FLAG_IS_GATE);
+	orig_addr = rann->rann_addr;
+	orig_sn = le32_to_cpu(rann->rann_seq);
+	interval = le32_to_cpu(rann->rann_interval);
+	hopcount = rann->rann_hopcount;
+	hopcount++;
+	metric = le32_to_cpu(rann->rann_metric);
+
+	/*  Ignore our own RANNs */
+	if (ether_addr_equal(orig_addr, sdata->vif.addr))
+		return;
+
+	mhwmp_dbg(sdata,
+		  "received RANN from %pM via neighbour %pM (is_gate=%d)\n",
+		  orig_addr, mgmt->sa, root_is_gate);
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, mgmt->sa);
+	if (!sta) {
+		rcu_read_unlock();
+		return;
+	}
+
+	metric_txsta = airtime_link_metric_get(local, sta);
+
+	mpath = mesh_path_lookup(sdata, orig_addr);
+	if (!mpath) {
+		mpath = mesh_path_add(sdata, orig_addr);
+		if (IS_ERR(mpath)) {
+			rcu_read_unlock();
+			sdata->u.mesh.mshstats.dropped_frames_no_route++;
+			return;
+		}
+	}
+
+	if (!(SN_LT(mpath->sn, orig_sn)) &&
+	    !(mpath->sn == orig_sn && metric < mpath->rann_metric)) {
+		rcu_read_unlock();
+		return;
+	}
+
+	if ((!(mpath->flags & (MESH_PATH_ACTIVE | MESH_PATH_RESOLVING)) ||
+	     (time_after(jiffies, mpath->last_preq_to_root +
+				  root_path_confirmation_jiffies(sdata)) ||
+	     time_before(jiffies, mpath->last_preq_to_root))) &&
+	     !(mpath->flags & MESH_PATH_FIXED) && (ttl != 0)) {
+		mhwmp_dbg(sdata,
+			  "time to refresh root mpath %pM\n",
+			  orig_addr);
+		mesh_queue_preq(mpath, PREQ_Q_F_START | PREQ_Q_F_REFRESH);
+		mpath->last_preq_to_root = jiffies;
+	}
+
+	mpath->sn = orig_sn;
+	mpath->rann_metric = metric + metric_txsta;
+	mpath->is_root = true;
+	/* Recording RANNs sender address to send individually
+	 * addressed PREQs destined for root mesh STA */
+	memcpy(mpath->rann_snd_addr, mgmt->sa, ETH_ALEN);
+
+	if (root_is_gate)
+		mesh_path_add_gate(mpath);
+
+	if (ttl <= 1) {
+		ifmsh->mshstats.dropped_frames_ttl++;
+		rcu_read_unlock();
+		return;
+	}
+	ttl--;
+
+	if (ifmsh->mshcfg.dot11MeshForwarding) {
+		mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr,
+				       cpu_to_le32(orig_sn),
+				       0, NULL, 0, broadcast_addr,
+				       hopcount, ttl, cpu_to_le32(interval),
+				       cpu_to_le32(metric + metric_txsta),
+				       0, sdata);
+	}
+
+	rcu_read_unlock();
+}
+
+
+void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
+			    struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee802_11_elems elems;
+	size_t baselen;
+	u32 last_hop_metric;
+	struct sta_info *sta;
+
+	/* need action_code */
+	if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+		return;
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, mgmt->sa);
+	if (!sta || sta->plink_state != NL80211_PLINK_ESTAB) {
+		rcu_read_unlock();
+		return;
+	}
+	rcu_read_unlock();
+
+	baselen = (u8 *) mgmt->u.action.u.mesh_action.variable - (u8 *) mgmt;
+	ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable,
+			       len - baselen, false, &elems);
+
+	if (elems.preq) {
+		if (elems.preq_len != 37)
+			/* Right now we support just 1 destination and no AE */
+			return;
+		last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq,
+						      MPATH_PREQ);
+		if (last_hop_metric)
+			hwmp_preq_frame_process(sdata, mgmt, elems.preq,
+						last_hop_metric);
+	}
+	if (elems.prep) {
+		if (elems.prep_len != 31)
+			/* Right now we support no AE */
+			return;
+		last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep,
+						      MPATH_PREP);
+		if (last_hop_metric)
+			hwmp_prep_frame_process(sdata, mgmt, elems.prep,
+						last_hop_metric);
+	}
+	if (elems.perr) {
+		if (elems.perr_len != 15)
+			/* Right now we support only one destination per PERR */
+			return;
+		hwmp_perr_frame_process(sdata, mgmt, elems.perr);
+	}
+	if (elems.rann)
+		hwmp_rann_frame_process(sdata, mgmt, elems.rann);
+}
+
+/**
+ * mesh_queue_preq - queue a PREQ to a given destination
+ *
+ * @mpath: mesh path to discover
+ * @flags: special attributes of the PREQ to be sent
+ *
+ * Locking: the function must be called from within a rcu read lock block.
+ *
+ */
+static void mesh_queue_preq(struct mesh_path *mpath, u8 flags)
+{
+	struct ieee80211_sub_if_data *sdata = mpath->sdata;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct mesh_preq_queue *preq_node;
+
+	preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC);
+	if (!preq_node) {
+		mhwmp_dbg(sdata, "could not allocate PREQ node\n");
+		return;
+	}
+
+	spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
+	if (ifmsh->preq_queue_len == MAX_PREQ_QUEUE_LEN) {
+		spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
+		kfree(preq_node);
+		if (printk_ratelimit())
+			mhwmp_dbg(sdata, "PREQ node queue full\n");
+		return;
+	}
+
+	spin_lock(&mpath->state_lock);
+	if (mpath->flags & MESH_PATH_REQ_QUEUED) {
+		spin_unlock(&mpath->state_lock);
+		spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
+		kfree(preq_node);
+		return;
+	}
+
+	memcpy(preq_node->dst, mpath->dst, ETH_ALEN);
+	preq_node->flags = flags;
+
+	mpath->flags |= MESH_PATH_REQ_QUEUED;
+	spin_unlock(&mpath->state_lock);
+
+	list_add_tail(&preq_node->list, &ifmsh->preq_queue.list);
+	++ifmsh->preq_queue_len;
+	spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
+
+	if (time_after(jiffies, ifmsh->last_preq + min_preq_int_jiff(sdata)))
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+
+	else if (time_before(jiffies, ifmsh->last_preq)) {
+		/* avoid long wait if did not send preqs for a long time
+		 * and jiffies wrapped around
+		 */
+		ifmsh->last_preq = jiffies - min_preq_int_jiff(sdata) - 1;
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+	} else
+		mod_timer(&ifmsh->mesh_path_timer, ifmsh->last_preq +
+						min_preq_int_jiff(sdata));
+}
+
+/**
+ * mesh_path_start_discovery - launch a path discovery from the PREQ queue
+ *
+ * @sdata: local mesh subif
+ */
+void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct mesh_preq_queue *preq_node;
+	struct mesh_path *mpath;
+	u8 ttl, target_flags;
+	const u8 *da;
+	u32 lifetime;
+
+	spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
+	if (!ifmsh->preq_queue_len ||
+		time_before(jiffies, ifmsh->last_preq +
+				min_preq_int_jiff(sdata))) {
+		spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
+		return;
+	}
+
+	preq_node = list_first_entry(&ifmsh->preq_queue.list,
+			struct mesh_preq_queue, list);
+	list_del(&preq_node->list);
+	--ifmsh->preq_queue_len;
+	spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
+
+	rcu_read_lock();
+	mpath = mesh_path_lookup(sdata, preq_node->dst);
+	if (!mpath)
+		goto enddiscovery;
+
+	spin_lock_bh(&mpath->state_lock);
+	mpath->flags &= ~MESH_PATH_REQ_QUEUED;
+	if (preq_node->flags & PREQ_Q_F_START) {
+		if (mpath->flags & MESH_PATH_RESOLVING) {
+			spin_unlock_bh(&mpath->state_lock);
+			goto enddiscovery;
+		} else {
+			mpath->flags &= ~MESH_PATH_RESOLVED;
+			mpath->flags |= MESH_PATH_RESOLVING;
+			mpath->discovery_retries = 0;
+			mpath->discovery_timeout = disc_timeout_jiff(sdata);
+		}
+	} else if (!(mpath->flags & MESH_PATH_RESOLVING) ||
+			mpath->flags & MESH_PATH_RESOLVED) {
+		mpath->flags &= ~MESH_PATH_RESOLVING;
+		spin_unlock_bh(&mpath->state_lock);
+		goto enddiscovery;
+	}
+
+	ifmsh->last_preq = jiffies;
+
+	if (time_after(jiffies, ifmsh->last_sn_update +
+				net_traversal_jiffies(sdata)) ||
+	    time_before(jiffies, ifmsh->last_sn_update)) {
+		++ifmsh->sn;
+		sdata->u.mesh.last_sn_update = jiffies;
+	}
+	lifetime = default_lifetime(sdata);
+	ttl = sdata->u.mesh.mshcfg.element_ttl;
+	if (ttl == 0) {
+		sdata->u.mesh.mshstats.dropped_frames_ttl++;
+		spin_unlock_bh(&mpath->state_lock);
+		goto enddiscovery;
+	}
+
+	if (preq_node->flags & PREQ_Q_F_REFRESH)
+		target_flags = MP_F_DO;
+	else
+		target_flags = MP_F_RF;
+
+	spin_unlock_bh(&mpath->state_lock);
+	da = (mpath->is_root) ? mpath->rann_snd_addr : broadcast_addr;
+	mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->vif.addr,
+			cpu_to_le32(ifmsh->sn), target_flags, mpath->dst,
+			cpu_to_le32(mpath->sn), da, 0,
+			ttl, cpu_to_le32(lifetime), 0,
+			cpu_to_le32(ifmsh->preq_id++), sdata);
+	mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);
+
+enddiscovery:
+	rcu_read_unlock();
+	kfree(preq_node);
+}
+
+/**
+ * mesh_nexthop_resolve - lookup next hop; conditionally start path discovery
+ *
+ * @skb: 802.11 frame to be sent
+ * @sdata: network subif the frame will be sent through
+ *
+ * Lookup next hop for given skb and start path discovery if no
+ * forwarding information is found.
+ *
+ * Returns: 0 if the next hop was found and -ENOENT if the frame was queued.
+ * skb is freeed here if no mpath could be allocated.
+ */
+int mesh_nexthop_resolve(struct ieee80211_sub_if_data *sdata,
+			 struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct mesh_path *mpath;
+	struct sk_buff *skb_to_free = NULL;
+	u8 *target_addr = hdr->addr3;
+	int err = 0;
+
+	/* Nulls are only sent to peers for PS and should be pre-addressed */
+	if (ieee80211_is_qos_nullfunc(hdr->frame_control))
+		return 0;
+
+	rcu_read_lock();
+	err = mesh_nexthop_lookup(sdata, skb);
+	if (!err)
+		goto endlookup;
+
+	/* no nexthop found, start resolving */
+	mpath = mesh_path_lookup(sdata, target_addr);
+	if (!mpath) {
+		mpath = mesh_path_add(sdata, target_addr);
+		if (IS_ERR(mpath)) {
+			mesh_path_discard_frame(sdata, skb);
+			err = PTR_ERR(mpath);
+			goto endlookup;
+		}
+	}
+
+	if (!(mpath->flags & MESH_PATH_RESOLVING))
+		mesh_queue_preq(mpath, PREQ_Q_F_START);
+
+	if (skb_queue_len(&mpath->frame_queue) >= MESH_FRAME_QUEUE_LEN)
+		skb_to_free = skb_dequeue(&mpath->frame_queue);
+
+	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+	ieee80211_set_qos_hdr(sdata, skb);
+	skb_queue_tail(&mpath->frame_queue, skb);
+	err = -ENOENT;
+	if (skb_to_free)
+		mesh_path_discard_frame(sdata, skb_to_free);
+
+endlookup:
+	rcu_read_unlock();
+	return err;
+}
+
+/**
+ * mesh_nexthop_lookup - put the appropriate next hop on a mesh frame. Calling
+ * this function is considered "using" the associated mpath, so preempt a path
+ * refresh if this mpath expires soon.
+ *
+ * @skb: 802.11 frame to be sent
+ * @sdata: network subif the frame will be sent through
+ *
+ * Returns: 0 if the next hop was found. Nonzero otherwise.
+ */
+int mesh_nexthop_lookup(struct ieee80211_sub_if_data *sdata,
+			struct sk_buff *skb)
+{
+	struct mesh_path *mpath;
+	struct sta_info *next_hop;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	u8 *target_addr = hdr->addr3;
+	int err = -ENOENT;
+
+	rcu_read_lock();
+	mpath = mesh_path_lookup(sdata, target_addr);
+
+	if (!mpath || !(mpath->flags & MESH_PATH_ACTIVE))
+		goto endlookup;
+
+	if (time_after(jiffies,
+		       mpath->exp_time -
+		       msecs_to_jiffies(sdata->u.mesh.mshcfg.path_refresh_time)) &&
+	    ether_addr_equal(sdata->vif.addr, hdr->addr4) &&
+	    !(mpath->flags & MESH_PATH_RESOLVING) &&
+	    !(mpath->flags & MESH_PATH_FIXED))
+		mesh_queue_preq(mpath, PREQ_Q_F_START | PREQ_Q_F_REFRESH);
+
+	next_hop = rcu_dereference(mpath->next_hop);
+	if (next_hop) {
+		memcpy(hdr->addr1, next_hop->sta.addr, ETH_ALEN);
+		memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
+		ieee80211_mps_set_frame_flags(sdata, next_hop, hdr);
+		err = 0;
+	}
+
+endlookup:
+	rcu_read_unlock();
+	return err;
+}
+
+void mesh_path_timer(unsigned long data)
+{
+	struct mesh_path *mpath = (void *) data;
+	struct ieee80211_sub_if_data *sdata = mpath->sdata;
+	int ret;
+
+	if (sdata->local->quiescing)
+		return;
+
+	spin_lock_bh(&mpath->state_lock);
+	if (mpath->flags & MESH_PATH_RESOLVED ||
+			(!(mpath->flags & MESH_PATH_RESOLVING))) {
+		mpath->flags &= ~(MESH_PATH_RESOLVING | MESH_PATH_RESOLVED);
+		spin_unlock_bh(&mpath->state_lock);
+	} else if (mpath->discovery_retries < max_preq_retries(sdata)) {
+		++mpath->discovery_retries;
+		mpath->discovery_timeout *= 2;
+		mpath->flags &= ~MESH_PATH_REQ_QUEUED;
+		spin_unlock_bh(&mpath->state_lock);
+		mesh_queue_preq(mpath, 0);
+	} else {
+		mpath->flags = 0;
+		mpath->exp_time = jiffies;
+		spin_unlock_bh(&mpath->state_lock);
+		if (!mpath->is_gate && mesh_gate_num(sdata) > 0) {
+			ret = mesh_path_send_to_gates(mpath);
+			if (ret)
+				mhwmp_dbg(sdata, "no gate was reachable\n");
+		} else
+			mesh_path_flush_pending(mpath);
+	}
+}
+
+void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	u32 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
+	u8 flags, target_flags = 0;
+
+	flags = (ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol)
+			? RANN_FLAG_IS_GATE : 0;
+
+	switch (ifmsh->mshcfg.dot11MeshHWMPRootMode) {
+	case IEEE80211_PROACTIVE_RANN:
+		mesh_path_sel_frame_tx(MPATH_RANN, flags, sdata->vif.addr,
+			       cpu_to_le32(++ifmsh->sn),
+			       0, NULL, 0, broadcast_addr,
+			       0, ifmsh->mshcfg.element_ttl,
+			       cpu_to_le32(interval), 0, 0, sdata);
+		break;
+	case IEEE80211_PROACTIVE_PREQ_WITH_PREP:
+		flags |= IEEE80211_PREQ_PROACTIVE_PREP_FLAG;
+	case IEEE80211_PROACTIVE_PREQ_NO_PREP:
+		interval = ifmsh->mshcfg.dot11MeshHWMPactivePathToRootTimeout;
+		target_flags |= IEEE80211_PREQ_TO_FLAG |
+				IEEE80211_PREQ_USN_FLAG;
+		mesh_path_sel_frame_tx(MPATH_PREQ, flags, sdata->vif.addr,
+				cpu_to_le32(++ifmsh->sn), target_flags,
+				(u8 *) broadcast_addr, 0, broadcast_addr,
+				0, ifmsh->mshcfg.element_ttl,
+				cpu_to_le32(interval),
+				0, cpu_to_le32(ifmsh->preq_id++), sdata);
+		break;
+	default:
+		mhwmp_dbg(sdata, "Proactive mechanism not supported\n");
+		return;
+	}
+}
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
new file mode 100644
index 0000000..89aacfd
--- /dev/null
+++ b/net/mac80211/mesh_pathtbl.c
@@ -0,0 +1,1110 @@
+/*
+ * Copyright (c) 2008, 2009 open80211s Ltd.
+ * Author:     Luis Carlos Cobo <luisca@cozybit.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/list.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <net/mac80211.h>
+#include "wme.h"
+#include "ieee80211_i.h"
+#include "mesh.h"
+
+/* There will be initially 2^INIT_PATHS_SIZE_ORDER buckets */
+#define INIT_PATHS_SIZE_ORDER	2
+
+/* Keep the mean chain length below this constant */
+#define MEAN_CHAIN_LEN		2
+
+static inline bool mpath_expired(struct mesh_path *mpath)
+{
+	return (mpath->flags & MESH_PATH_ACTIVE) &&
+	       time_after(jiffies, mpath->exp_time) &&
+	       !(mpath->flags & MESH_PATH_FIXED);
+}
+
+struct mpath_node {
+	struct hlist_node list;
+	struct rcu_head rcu;
+	/* This indirection allows two different tables to point to the same
+	 * mesh_path structure, useful when resizing
+	 */
+	struct mesh_path *mpath;
+};
+
+static struct mesh_table __rcu *mesh_paths;
+static struct mesh_table __rcu *mpp_paths; /* Store paths for MPP&MAP */
+
+int mesh_paths_generation;
+
+/* This lock will have the grow table function as writer and add / delete nodes
+ * as readers. RCU provides sufficient protection only when reading the table
+ * (i.e. doing lookups).  Adding or adding or removing nodes requires we take
+ * the read lock or we risk operating on an old table.  The write lock is only
+ * needed when modifying the number of buckets a table.
+ */
+static DEFINE_RWLOCK(pathtbl_resize_lock);
+
+
+static inline struct mesh_table *resize_dereference_mesh_paths(void)
+{
+	return rcu_dereference_protected(mesh_paths,
+		lockdep_is_held(&pathtbl_resize_lock));
+}
+
+static inline struct mesh_table *resize_dereference_mpp_paths(void)
+{
+	return rcu_dereference_protected(mpp_paths,
+		lockdep_is_held(&pathtbl_resize_lock));
+}
+
+/*
+ * CAREFUL -- "tbl" must not be an expression,
+ * in particular not an rcu_dereference(), since
+ * it's used twice. So it is illegal to do
+ *	for_each_mesh_entry(rcu_dereference(...), ...)
+ */
+#define for_each_mesh_entry(tbl, node, i) \
+	for (i = 0; i <= tbl->hash_mask; i++) \
+		hlist_for_each_entry_rcu(node, &tbl->hash_buckets[i], list)
+
+
+static struct mesh_table *mesh_table_alloc(int size_order)
+{
+	int i;
+	struct mesh_table *newtbl;
+
+	newtbl = kmalloc(sizeof(struct mesh_table), GFP_ATOMIC);
+	if (!newtbl)
+		return NULL;
+
+	newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) *
+			(1 << size_order), GFP_ATOMIC);
+
+	if (!newtbl->hash_buckets) {
+		kfree(newtbl);
+		return NULL;
+	}
+
+	newtbl->hashwlock = kmalloc(sizeof(spinlock_t) *
+			(1 << size_order), GFP_ATOMIC);
+	if (!newtbl->hashwlock) {
+		kfree(newtbl->hash_buckets);
+		kfree(newtbl);
+		return NULL;
+	}
+
+	newtbl->size_order = size_order;
+	newtbl->hash_mask = (1 << size_order) - 1;
+	atomic_set(&newtbl->entries,  0);
+	get_random_bytes(&newtbl->hash_rnd,
+			sizeof(newtbl->hash_rnd));
+	for (i = 0; i <= newtbl->hash_mask; i++)
+		spin_lock_init(&newtbl->hashwlock[i]);
+	spin_lock_init(&newtbl->gates_lock);
+
+	return newtbl;
+}
+
+static void __mesh_table_free(struct mesh_table *tbl)
+{
+	kfree(tbl->hash_buckets);
+	kfree(tbl->hashwlock);
+	kfree(tbl);
+}
+
+static void mesh_table_free(struct mesh_table *tbl, bool free_leafs)
+{
+	struct hlist_head *mesh_hash;
+	struct hlist_node *p, *q;
+	struct mpath_node *gate;
+	int i;
+
+	mesh_hash = tbl->hash_buckets;
+	for (i = 0; i <= tbl->hash_mask; i++) {
+		spin_lock_bh(&tbl->hashwlock[i]);
+		hlist_for_each_safe(p, q, &mesh_hash[i]) {
+			tbl->free_node(p, free_leafs);
+			atomic_dec(&tbl->entries);
+		}
+		spin_unlock_bh(&tbl->hashwlock[i]);
+	}
+	if (free_leafs) {
+		spin_lock_bh(&tbl->gates_lock);
+		hlist_for_each_entry_safe(gate, q,
+					 tbl->known_gates, list) {
+			hlist_del(&gate->list);
+			kfree(gate);
+		}
+		kfree(tbl->known_gates);
+		spin_unlock_bh(&tbl->gates_lock);
+	}
+
+	__mesh_table_free(tbl);
+}
+
+static int mesh_table_grow(struct mesh_table *oldtbl,
+			   struct mesh_table *newtbl)
+{
+	struct hlist_head *oldhash;
+	struct hlist_node *p, *q;
+	int i;
+
+	if (atomic_read(&oldtbl->entries)
+			< oldtbl->mean_chain_len * (oldtbl->hash_mask + 1))
+		return -EAGAIN;
+
+	newtbl->free_node = oldtbl->free_node;
+	newtbl->mean_chain_len = oldtbl->mean_chain_len;
+	newtbl->copy_node = oldtbl->copy_node;
+	newtbl->known_gates = oldtbl->known_gates;
+	atomic_set(&newtbl->entries, atomic_read(&oldtbl->entries));
+
+	oldhash = oldtbl->hash_buckets;
+	for (i = 0; i <= oldtbl->hash_mask; i++)
+		hlist_for_each(p, &oldhash[i])
+			if (oldtbl->copy_node(p, newtbl) < 0)
+				goto errcopy;
+
+	return 0;
+
+errcopy:
+	for (i = 0; i <= newtbl->hash_mask; i++) {
+		hlist_for_each_safe(p, q, &newtbl->hash_buckets[i])
+			oldtbl->free_node(p, 0);
+	}
+	return -ENOMEM;
+}
+
+static u32 mesh_table_hash(const u8 *addr, struct ieee80211_sub_if_data *sdata,
+			   struct mesh_table *tbl)
+{
+	/* Use last four bytes of hw addr and interface index as hash index */
+	return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex,
+			    tbl->hash_rnd) & tbl->hash_mask;
+}
+
+
+/**
+ *
+ * mesh_path_assign_nexthop - update mesh path next hop
+ *
+ * @mpath: mesh path to update
+ * @sta: next hop to assign
+ *
+ * Locking: mpath->state_lock must be held when calling this function
+ */
+void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta)
+{
+	struct sk_buff *skb;
+	struct ieee80211_hdr *hdr;
+	unsigned long flags;
+
+	rcu_assign_pointer(mpath->next_hop, sta);
+
+	spin_lock_irqsave(&mpath->frame_queue.lock, flags);
+	skb_queue_walk(&mpath->frame_queue, skb) {
+		hdr = (struct ieee80211_hdr *) skb->data;
+		memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
+		memcpy(hdr->addr2, mpath->sdata->vif.addr, ETH_ALEN);
+		ieee80211_mps_set_frame_flags(sta->sdata, sta, hdr);
+	}
+
+	spin_unlock_irqrestore(&mpath->frame_queue.lock, flags);
+}
+
+static void prepare_for_gate(struct sk_buff *skb, char *dst_addr,
+			     struct mesh_path *gate_mpath)
+{
+	struct ieee80211_hdr *hdr;
+	struct ieee80211s_hdr *mshdr;
+	int mesh_hdrlen, hdrlen;
+	char *next_hop;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
+
+	if (!(mshdr->flags & MESH_FLAGS_AE)) {
+		/* size of the fixed part of the mesh header */
+		mesh_hdrlen = 6;
+
+		/* make room for the two extended addresses */
+		skb_push(skb, 2 * ETH_ALEN);
+		memmove(skb->data, hdr, hdrlen + mesh_hdrlen);
+
+		hdr = (struct ieee80211_hdr *) skb->data;
+
+		/* we preserve the previous mesh header and only add
+		 * the new addreses */
+		mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
+		mshdr->flags = MESH_FLAGS_AE_A5_A6;
+		memcpy(mshdr->eaddr1, hdr->addr3, ETH_ALEN);
+		memcpy(mshdr->eaddr2, hdr->addr4, ETH_ALEN);
+	}
+
+	/* update next hop */
+	hdr = (struct ieee80211_hdr *) skb->data;
+	rcu_read_lock();
+	next_hop = rcu_dereference(gate_mpath->next_hop)->sta.addr;
+	memcpy(hdr->addr1, next_hop, ETH_ALEN);
+	rcu_read_unlock();
+	memcpy(hdr->addr2, gate_mpath->sdata->vif.addr, ETH_ALEN);
+	memcpy(hdr->addr3, dst_addr, ETH_ALEN);
+}
+
+/**
+ *
+ * mesh_path_move_to_queue - Move or copy frames from one mpath queue to another
+ *
+ * This function is used to transfer or copy frames from an unresolved mpath to
+ * a gate mpath.  The function also adds the Address Extension field and
+ * updates the next hop.
+ *
+ * If a frame already has an Address Extension field, only the next hop and
+ * destination addresses are updated.
+ *
+ * The gate mpath must be an active mpath with a valid mpath->next_hop.
+ *
+ * @mpath: An active mpath the frames will be sent to (i.e. the gate)
+ * @from_mpath: The failed mpath
+ * @copy: When true, copy all the frames to the new mpath queue.  When false,
+ * move them.
+ */
+static void mesh_path_move_to_queue(struct mesh_path *gate_mpath,
+				    struct mesh_path *from_mpath,
+				    bool copy)
+{
+	struct sk_buff *skb, *fskb, *tmp;
+	struct sk_buff_head failq;
+	unsigned long flags;
+
+	BUG_ON(gate_mpath == from_mpath);
+	BUG_ON(!gate_mpath->next_hop);
+
+	__skb_queue_head_init(&failq);
+
+	spin_lock_irqsave(&from_mpath->frame_queue.lock, flags);
+	skb_queue_splice_init(&from_mpath->frame_queue, &failq);
+	spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags);
+
+	skb_queue_walk_safe(&failq, fskb, tmp) {
+		if (skb_queue_len(&gate_mpath->frame_queue) >=
+				  MESH_FRAME_QUEUE_LEN) {
+			mpath_dbg(gate_mpath->sdata, "mpath queue full!\n");
+			break;
+		}
+
+		skb = skb_copy(fskb, GFP_ATOMIC);
+		if (WARN_ON(!skb))
+			break;
+
+		prepare_for_gate(skb, gate_mpath->dst, gate_mpath);
+		skb_queue_tail(&gate_mpath->frame_queue, skb);
+
+		if (copy)
+			continue;
+
+		__skb_unlink(fskb, &failq);
+		kfree_skb(fskb);
+	}
+
+	mpath_dbg(gate_mpath->sdata, "Mpath queue for gate %pM has %d frames\n",
+		  gate_mpath->dst, skb_queue_len(&gate_mpath->frame_queue));
+
+	if (!copy)
+		return;
+
+	spin_lock_irqsave(&from_mpath->frame_queue.lock, flags);
+	skb_queue_splice(&failq, &from_mpath->frame_queue);
+	spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags);
+}
+
+
+static struct mesh_path *mpath_lookup(struct mesh_table *tbl, const u8 *dst,
+				      struct ieee80211_sub_if_data *sdata)
+{
+	struct mesh_path *mpath;
+	struct hlist_head *bucket;
+	struct mpath_node *node;
+
+	bucket = &tbl->hash_buckets[mesh_table_hash(dst, sdata, tbl)];
+	hlist_for_each_entry_rcu(node, bucket, list) {
+		mpath = node->mpath;
+		if (mpath->sdata == sdata &&
+		    ether_addr_equal(dst, mpath->dst)) {
+			if (mpath_expired(mpath)) {
+				spin_lock_bh(&mpath->state_lock);
+				mpath->flags &= ~MESH_PATH_ACTIVE;
+				spin_unlock_bh(&mpath->state_lock);
+			}
+			return mpath;
+		}
+	}
+	return NULL;
+}
+
+/**
+ * mesh_path_lookup - look up a path in the mesh path table
+ * @sdata: local subif
+ * @dst: hardware address (ETH_ALEN length) of destination
+ *
+ * Returns: pointer to the mesh path structure, or NULL if not found
+ *
+ * Locking: must be called within a read rcu section.
+ */
+struct mesh_path *
+mesh_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
+{
+	return mpath_lookup(rcu_dereference(mesh_paths), dst, sdata);
+}
+
+struct mesh_path *
+mpp_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
+{
+	return mpath_lookup(rcu_dereference(mpp_paths), dst, sdata);
+}
+
+
+/**
+ * mesh_path_lookup_by_idx - look up a path in the mesh path table by its index
+ * @idx: index
+ * @sdata: local subif, or NULL for all entries
+ *
+ * Returns: pointer to the mesh path structure, or NULL if not found.
+ *
+ * Locking: must be called within a read rcu section.
+ */
+struct mesh_path *
+mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
+{
+	struct mesh_table *tbl = rcu_dereference(mesh_paths);
+	struct mpath_node *node;
+	int i;
+	int j = 0;
+
+	for_each_mesh_entry(tbl, node, i) {
+		if (sdata && node->mpath->sdata != sdata)
+			continue;
+		if (j++ == idx) {
+			if (mpath_expired(node->mpath)) {
+				spin_lock_bh(&node->mpath->state_lock);
+				node->mpath->flags &= ~MESH_PATH_ACTIVE;
+				spin_unlock_bh(&node->mpath->state_lock);
+			}
+			return node->mpath;
+		}
+	}
+
+	return NULL;
+}
+
+/**
+ * mesh_path_add_gate - add the given mpath to a mesh gate to our path table
+ * @mpath: gate path to add to table
+ */
+int mesh_path_add_gate(struct mesh_path *mpath)
+{
+	struct mesh_table *tbl;
+	struct mpath_node *gate, *new_gate;
+	int err;
+
+	rcu_read_lock();
+	tbl = rcu_dereference(mesh_paths);
+
+	hlist_for_each_entry_rcu(gate, tbl->known_gates, list)
+		if (gate->mpath == mpath) {
+			err = -EEXIST;
+			goto err_rcu;
+		}
+
+	new_gate = kzalloc(sizeof(struct mpath_node), GFP_ATOMIC);
+	if (!new_gate) {
+		err = -ENOMEM;
+		goto err_rcu;
+	}
+
+	mpath->is_gate = true;
+	mpath->sdata->u.mesh.num_gates++;
+	new_gate->mpath = mpath;
+	spin_lock_bh(&tbl->gates_lock);
+	hlist_add_head_rcu(&new_gate->list, tbl->known_gates);
+	spin_unlock_bh(&tbl->gates_lock);
+	mpath_dbg(mpath->sdata,
+		  "Mesh path: Recorded new gate: %pM. %d known gates\n",
+		  mpath->dst, mpath->sdata->u.mesh.num_gates);
+	err = 0;
+err_rcu:
+	rcu_read_unlock();
+	return err;
+}
+
+/**
+ * mesh_gate_del - remove a mesh gate from the list of known gates
+ * @tbl: table which holds our list of known gates
+ * @mpath: gate mpath
+ *
+ * Locking: must be called inside rcu_read_lock() section
+ */
+static void mesh_gate_del(struct mesh_table *tbl, struct mesh_path *mpath)
+{
+	struct mpath_node *gate;
+	struct hlist_node *q;
+
+	hlist_for_each_entry_safe(gate, q, tbl->known_gates, list) {
+		if (gate->mpath != mpath)
+			continue;
+		spin_lock_bh(&tbl->gates_lock);
+		hlist_del_rcu(&gate->list);
+		kfree_rcu(gate, rcu);
+		spin_unlock_bh(&tbl->gates_lock);
+		mpath->sdata->u.mesh.num_gates--;
+		mpath->is_gate = false;
+		mpath_dbg(mpath->sdata,
+			  "Mesh path: Deleted gate: %pM. %d known gates\n",
+			  mpath->dst, mpath->sdata->u.mesh.num_gates);
+		break;
+	}
+}
+
+/**
+ * mesh_gate_num - number of gates known to this interface
+ * @sdata: subif data
+ */
+int mesh_gate_num(struct ieee80211_sub_if_data *sdata)
+{
+	return sdata->u.mesh.num_gates;
+}
+
+/**
+ * mesh_path_add - allocate and add a new path to the mesh path table
+ * @dst: destination address of the path (ETH_ALEN length)
+ * @sdata: local subif
+ *
+ * Returns: 0 on success
+ *
+ * State: the initial state of the new path is set to 0
+ */
+struct mesh_path *mesh_path_add(struct ieee80211_sub_if_data *sdata,
+				const u8 *dst)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+	struct mesh_table *tbl;
+	struct mesh_path *mpath, *new_mpath;
+	struct mpath_node *node, *new_node;
+	struct hlist_head *bucket;
+	int grow = 0;
+	int err;
+	u32 hash_idx;
+
+	if (ether_addr_equal(dst, sdata->vif.addr))
+		/* never add ourselves as neighbours */
+		return ERR_PTR(-ENOTSUPP);
+
+	if (is_multicast_ether_addr(dst))
+		return ERR_PTR(-ENOTSUPP);
+
+	if (atomic_add_unless(&sdata->u.mesh.mpaths, 1, MESH_MAX_MPATHS) == 0)
+		return ERR_PTR(-ENOSPC);
+
+	read_lock_bh(&pathtbl_resize_lock);
+	tbl = resize_dereference_mesh_paths();
+
+	hash_idx = mesh_table_hash(dst, sdata, tbl);
+	bucket = &tbl->hash_buckets[hash_idx];
+
+	spin_lock(&tbl->hashwlock[hash_idx]);
+
+	hlist_for_each_entry(node, bucket, list) {
+		mpath = node->mpath;
+		if (mpath->sdata == sdata &&
+		    ether_addr_equal(dst, mpath->dst))
+			goto found;
+	}
+
+	err = -ENOMEM;
+	new_mpath = kzalloc(sizeof(struct mesh_path), GFP_ATOMIC);
+	if (!new_mpath)
+		goto err_path_alloc;
+
+	new_node = kmalloc(sizeof(struct mpath_node), GFP_ATOMIC);
+	if (!new_node)
+		goto err_node_alloc;
+
+	memcpy(new_mpath->dst, dst, ETH_ALEN);
+	eth_broadcast_addr(new_mpath->rann_snd_addr);
+	new_mpath->is_root = false;
+	new_mpath->sdata = sdata;
+	new_mpath->flags = 0;
+	skb_queue_head_init(&new_mpath->frame_queue);
+	new_node->mpath = new_mpath;
+	new_mpath->timer.data = (unsigned long) new_mpath;
+	new_mpath->timer.function = mesh_path_timer;
+	new_mpath->exp_time = jiffies;
+	spin_lock_init(&new_mpath->state_lock);
+	init_timer(&new_mpath->timer);
+
+	hlist_add_head_rcu(&new_node->list, bucket);
+	if (atomic_inc_return(&tbl->entries) >=
+	    tbl->mean_chain_len * (tbl->hash_mask + 1))
+		grow = 1;
+
+	mesh_paths_generation++;
+
+	if (grow) {
+		set_bit(MESH_WORK_GROW_MPATH_TABLE,  &ifmsh->wrkq_flags);
+		ieee80211_queue_work(&local->hw, &sdata->work);
+	}
+	mpath = new_mpath;
+found:
+	spin_unlock(&tbl->hashwlock[hash_idx]);
+	read_unlock_bh(&pathtbl_resize_lock);
+	return mpath;
+
+err_node_alloc:
+	kfree(new_mpath);
+err_path_alloc:
+	atomic_dec(&sdata->u.mesh.mpaths);
+	spin_unlock(&tbl->hashwlock[hash_idx]);
+	read_unlock_bh(&pathtbl_resize_lock);
+	return ERR_PTR(err);
+}
+
+static void mesh_table_free_rcu(struct rcu_head *rcu)
+{
+	struct mesh_table *tbl = container_of(rcu, struct mesh_table, rcu_head);
+
+	mesh_table_free(tbl, false);
+}
+
+void mesh_mpath_table_grow(void)
+{
+	struct mesh_table *oldtbl, *newtbl;
+
+	write_lock_bh(&pathtbl_resize_lock);
+	oldtbl = resize_dereference_mesh_paths();
+	newtbl = mesh_table_alloc(oldtbl->size_order + 1);
+	if (!newtbl)
+		goto out;
+	if (mesh_table_grow(oldtbl, newtbl) < 0) {
+		__mesh_table_free(newtbl);
+		goto out;
+	}
+	rcu_assign_pointer(mesh_paths, newtbl);
+
+	call_rcu(&oldtbl->rcu_head, mesh_table_free_rcu);
+
+ out:
+	write_unlock_bh(&pathtbl_resize_lock);
+}
+
+void mesh_mpp_table_grow(void)
+{
+	struct mesh_table *oldtbl, *newtbl;
+
+	write_lock_bh(&pathtbl_resize_lock);
+	oldtbl = resize_dereference_mpp_paths();
+	newtbl = mesh_table_alloc(oldtbl->size_order + 1);
+	if (!newtbl)
+		goto out;
+	if (mesh_table_grow(oldtbl, newtbl) < 0) {
+		__mesh_table_free(newtbl);
+		goto out;
+	}
+	rcu_assign_pointer(mpp_paths, newtbl);
+	call_rcu(&oldtbl->rcu_head, mesh_table_free_rcu);
+
+ out:
+	write_unlock_bh(&pathtbl_resize_lock);
+}
+
+int mpp_path_add(struct ieee80211_sub_if_data *sdata,
+		 const u8 *dst, const u8 *mpp)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+	struct mesh_table *tbl;
+	struct mesh_path *mpath, *new_mpath;
+	struct mpath_node *node, *new_node;
+	struct hlist_head *bucket;
+	int grow = 0;
+	int err = 0;
+	u32 hash_idx;
+
+	if (ether_addr_equal(dst, sdata->vif.addr))
+		/* never add ourselves as neighbours */
+		return -ENOTSUPP;
+
+	if (is_multicast_ether_addr(dst))
+		return -ENOTSUPP;
+
+	err = -ENOMEM;
+	new_mpath = kzalloc(sizeof(struct mesh_path), GFP_ATOMIC);
+	if (!new_mpath)
+		goto err_path_alloc;
+
+	new_node = kmalloc(sizeof(struct mpath_node), GFP_ATOMIC);
+	if (!new_node)
+		goto err_node_alloc;
+
+	read_lock_bh(&pathtbl_resize_lock);
+	memcpy(new_mpath->dst, dst, ETH_ALEN);
+	memcpy(new_mpath->mpp, mpp, ETH_ALEN);
+	new_mpath->sdata = sdata;
+	new_mpath->flags = 0;
+	skb_queue_head_init(&new_mpath->frame_queue);
+	new_node->mpath = new_mpath;
+	init_timer(&new_mpath->timer);
+	new_mpath->exp_time = jiffies;
+	spin_lock_init(&new_mpath->state_lock);
+
+	tbl = resize_dereference_mpp_paths();
+
+	hash_idx = mesh_table_hash(dst, sdata, tbl);
+	bucket = &tbl->hash_buckets[hash_idx];
+
+	spin_lock(&tbl->hashwlock[hash_idx]);
+
+	err = -EEXIST;
+	hlist_for_each_entry(node, bucket, list) {
+		mpath = node->mpath;
+		if (mpath->sdata == sdata &&
+		    ether_addr_equal(dst, mpath->dst))
+			goto err_exists;
+	}
+
+	hlist_add_head_rcu(&new_node->list, bucket);
+	if (atomic_inc_return(&tbl->entries) >=
+	    tbl->mean_chain_len * (tbl->hash_mask + 1))
+		grow = 1;
+
+	spin_unlock(&tbl->hashwlock[hash_idx]);
+	read_unlock_bh(&pathtbl_resize_lock);
+	if (grow) {
+		set_bit(MESH_WORK_GROW_MPP_TABLE,  &ifmsh->wrkq_flags);
+		ieee80211_queue_work(&local->hw, &sdata->work);
+	}
+	return 0;
+
+err_exists:
+	spin_unlock(&tbl->hashwlock[hash_idx]);
+	read_unlock_bh(&pathtbl_resize_lock);
+	kfree(new_node);
+err_node_alloc:
+	kfree(new_mpath);
+err_path_alloc:
+	return err;
+}
+
+
+/**
+ * mesh_plink_broken - deactivates paths and sends perr when a link breaks
+ *
+ * @sta: broken peer link
+ *
+ * This function must be called from the rate control algorithm if enough
+ * delivery errors suggest that a peer link is no longer usable.
+ */
+void mesh_plink_broken(struct sta_info *sta)
+{
+	struct mesh_table *tbl;
+	static const u8 bcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+	struct mesh_path *mpath;
+	struct mpath_node *node;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	int i;
+	__le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_DEST_UNREACHABLE);
+
+	rcu_read_lock();
+	tbl = rcu_dereference(mesh_paths);
+	for_each_mesh_entry(tbl, node, i) {
+		mpath = node->mpath;
+		if (rcu_dereference(mpath->next_hop) == sta &&
+		    mpath->flags & MESH_PATH_ACTIVE &&
+		    !(mpath->flags & MESH_PATH_FIXED)) {
+			spin_lock_bh(&mpath->state_lock);
+			mpath->flags &= ~MESH_PATH_ACTIVE;
+			++mpath->sn;
+			spin_unlock_bh(&mpath->state_lock);
+			mesh_path_error_tx(sdata,
+					   sdata->u.mesh.mshcfg.element_ttl,
+					   mpath->dst, cpu_to_le32(mpath->sn),
+					   reason, bcast);
+		}
+	}
+	rcu_read_unlock();
+}
+
+static void mesh_path_node_reclaim(struct rcu_head *rp)
+{
+	struct mpath_node *node = container_of(rp, struct mpath_node, rcu);
+	struct ieee80211_sub_if_data *sdata = node->mpath->sdata;
+
+	del_timer_sync(&node->mpath->timer);
+	atomic_dec(&sdata->u.mesh.mpaths);
+	kfree(node->mpath);
+	kfree(node);
+}
+
+/* needs to be called with the corresponding hashwlock taken */
+static void __mesh_path_del(struct mesh_table *tbl, struct mpath_node *node)
+{
+	struct mesh_path *mpath;
+	mpath = node->mpath;
+	spin_lock(&mpath->state_lock);
+	mpath->flags |= MESH_PATH_RESOLVING;
+	if (mpath->is_gate)
+		mesh_gate_del(tbl, mpath);
+	hlist_del_rcu(&node->list);
+	call_rcu(&node->rcu, mesh_path_node_reclaim);
+	spin_unlock(&mpath->state_lock);
+	atomic_dec(&tbl->entries);
+}
+
+/**
+ * mesh_path_flush_by_nexthop - Deletes mesh paths if their next hop matches
+ *
+ * @sta: mesh peer to match
+ *
+ * RCU notes: this function is called when a mesh plink transitions from
+ * PLINK_ESTAB to any other state, since PLINK_ESTAB state is the only one that
+ * allows path creation. This will happen before the sta can be freed (because
+ * sta_info_destroy() calls this) so any reader in a rcu read block will be
+ * protected against the plink disappearing.
+ */
+void mesh_path_flush_by_nexthop(struct sta_info *sta)
+{
+	struct mesh_table *tbl;
+	struct mesh_path *mpath;
+	struct mpath_node *node;
+	int i;
+
+	rcu_read_lock();
+	read_lock_bh(&pathtbl_resize_lock);
+	tbl = resize_dereference_mesh_paths();
+	for_each_mesh_entry(tbl, node, i) {
+		mpath = node->mpath;
+		if (rcu_dereference(mpath->next_hop) == sta) {
+			spin_lock(&tbl->hashwlock[i]);
+			__mesh_path_del(tbl, node);
+			spin_unlock(&tbl->hashwlock[i]);
+		}
+	}
+	read_unlock_bh(&pathtbl_resize_lock);
+	rcu_read_unlock();
+}
+
+static void table_flush_by_iface(struct mesh_table *tbl,
+				 struct ieee80211_sub_if_data *sdata)
+{
+	struct mesh_path *mpath;
+	struct mpath_node *node;
+	int i;
+
+	WARN_ON(!rcu_read_lock_held());
+	for_each_mesh_entry(tbl, node, i) {
+		mpath = node->mpath;
+		if (mpath->sdata != sdata)
+			continue;
+		spin_lock_bh(&tbl->hashwlock[i]);
+		__mesh_path_del(tbl, node);
+		spin_unlock_bh(&tbl->hashwlock[i]);
+	}
+}
+
+/**
+ * mesh_path_flush_by_iface - Deletes all mesh paths associated with a given iface
+ *
+ * This function deletes both mesh paths as well as mesh portal paths.
+ *
+ * @sdata: interface data to match
+ *
+ */
+void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
+{
+	struct mesh_table *tbl;
+
+	rcu_read_lock();
+	read_lock_bh(&pathtbl_resize_lock);
+	tbl = resize_dereference_mesh_paths();
+	table_flush_by_iface(tbl, sdata);
+	tbl = resize_dereference_mpp_paths();
+	table_flush_by_iface(tbl, sdata);
+	read_unlock_bh(&pathtbl_resize_lock);
+	rcu_read_unlock();
+}
+
+/**
+ * mesh_path_del - delete a mesh path from the table
+ *
+ * @addr: dst address (ETH_ALEN length)
+ * @sdata: local subif
+ *
+ * Returns: 0 if successful
+ */
+int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
+{
+	struct mesh_table *tbl;
+	struct mesh_path *mpath;
+	struct mpath_node *node;
+	struct hlist_head *bucket;
+	int hash_idx;
+	int err = 0;
+
+	read_lock_bh(&pathtbl_resize_lock);
+	tbl = resize_dereference_mesh_paths();
+	hash_idx = mesh_table_hash(addr, sdata, tbl);
+	bucket = &tbl->hash_buckets[hash_idx];
+
+	spin_lock(&tbl->hashwlock[hash_idx]);
+	hlist_for_each_entry(node, bucket, list) {
+		mpath = node->mpath;
+		if (mpath->sdata == sdata &&
+		    ether_addr_equal(addr, mpath->dst)) {
+			__mesh_path_del(tbl, node);
+			goto enddel;
+		}
+	}
+
+	err = -ENXIO;
+enddel:
+	mesh_paths_generation++;
+	spin_unlock(&tbl->hashwlock[hash_idx]);
+	read_unlock_bh(&pathtbl_resize_lock);
+	return err;
+}
+
+/**
+ * mesh_path_tx_pending - sends pending frames in a mesh path queue
+ *
+ * @mpath: mesh path to activate
+ *
+ * Locking: the state_lock of the mpath structure must NOT be held when calling
+ * this function.
+ */
+void mesh_path_tx_pending(struct mesh_path *mpath)
+{
+	if (mpath->flags & MESH_PATH_ACTIVE)
+		ieee80211_add_pending_skbs(mpath->sdata->local,
+				&mpath->frame_queue);
+}
+
+/**
+ * mesh_path_send_to_gates - sends pending frames to all known mesh gates
+ *
+ * @mpath: mesh path whose queue will be emptied
+ *
+ * If there is only one gate, the frames are transferred from the failed mpath
+ * queue to that gate's queue.  If there are more than one gates, the frames
+ * are copied from each gate to the next.  After frames are copied, the
+ * mpath queues are emptied onto the transmission queue.
+ */
+int mesh_path_send_to_gates(struct mesh_path *mpath)
+{
+	struct ieee80211_sub_if_data *sdata = mpath->sdata;
+	struct mesh_table *tbl;
+	struct mesh_path *from_mpath = mpath;
+	struct mpath_node *gate = NULL;
+	bool copy = false;
+	struct hlist_head *known_gates;
+
+	rcu_read_lock();
+	tbl = rcu_dereference(mesh_paths);
+	known_gates = tbl->known_gates;
+	rcu_read_unlock();
+
+	if (!known_gates)
+		return -EHOSTUNREACH;
+
+	hlist_for_each_entry_rcu(gate, known_gates, list) {
+		if (gate->mpath->sdata != sdata)
+			continue;
+
+		if (gate->mpath->flags & MESH_PATH_ACTIVE) {
+			mpath_dbg(sdata, "Forwarding to %pM\n", gate->mpath->dst);
+			mesh_path_move_to_queue(gate->mpath, from_mpath, copy);
+			from_mpath = gate->mpath;
+			copy = true;
+		} else {
+			mpath_dbg(sdata,
+				  "Not forwarding %p (flags %#x)\n",
+				  gate->mpath, gate->mpath->flags);
+		}
+	}
+
+	hlist_for_each_entry_rcu(gate, known_gates, list)
+		if (gate->mpath->sdata == sdata) {
+			mpath_dbg(sdata, "Sending to %pM\n", gate->mpath->dst);
+			mesh_path_tx_pending(gate->mpath);
+		}
+
+	return (from_mpath == mpath) ? -EHOSTUNREACH : 0;
+}
+
+/**
+ * mesh_path_discard_frame - discard a frame whose path could not be resolved
+ *
+ * @skb: frame to discard
+ * @sdata: network subif the frame was to be sent through
+ *
+ * Locking: the function must me called within a rcu_read_lock region
+ */
+void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
+			     struct sk_buff *skb)
+{
+	kfree_skb(skb);
+	sdata->u.mesh.mshstats.dropped_frames_no_route++;
+}
+
+/**
+ * mesh_path_flush_pending - free the pending queue of a mesh path
+ *
+ * @mpath: mesh path whose queue has to be freed
+ *
+ * Locking: the function must me called within a rcu_read_lock region
+ */
+void mesh_path_flush_pending(struct mesh_path *mpath)
+{
+	struct sk_buff *skb;
+
+	while ((skb = skb_dequeue(&mpath->frame_queue)) != NULL)
+		mesh_path_discard_frame(mpath->sdata, skb);
+}
+
+/**
+ * mesh_path_fix_nexthop - force a specific next hop for a mesh path
+ *
+ * @mpath: the mesh path to modify
+ * @next_hop: the next hop to force
+ *
+ * Locking: this function must be called holding mpath->state_lock
+ */
+void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop)
+{
+	spin_lock_bh(&mpath->state_lock);
+	mesh_path_assign_nexthop(mpath, next_hop);
+	mpath->sn = 0xffff;
+	mpath->metric = 0;
+	mpath->hop_count = 0;
+	mpath->exp_time = 0;
+	mpath->flags |= MESH_PATH_FIXED;
+	mesh_path_activate(mpath);
+	spin_unlock_bh(&mpath->state_lock);
+	mesh_path_tx_pending(mpath);
+}
+
+static void mesh_path_node_free(struct hlist_node *p, bool free_leafs)
+{
+	struct mesh_path *mpath;
+	struct mpath_node *node = hlist_entry(p, struct mpath_node, list);
+	mpath = node->mpath;
+	hlist_del_rcu(p);
+	if (free_leafs) {
+		del_timer_sync(&mpath->timer);
+		kfree(mpath);
+	}
+	kfree(node);
+}
+
+static int mesh_path_node_copy(struct hlist_node *p, struct mesh_table *newtbl)
+{
+	struct mesh_path *mpath;
+	struct mpath_node *node, *new_node;
+	u32 hash_idx;
+
+	new_node = kmalloc(sizeof(struct mpath_node), GFP_ATOMIC);
+	if (new_node == NULL)
+		return -ENOMEM;
+
+	node = hlist_entry(p, struct mpath_node, list);
+	mpath = node->mpath;
+	new_node->mpath = mpath;
+	hash_idx = mesh_table_hash(mpath->dst, mpath->sdata, newtbl);
+	hlist_add_head(&new_node->list,
+			&newtbl->hash_buckets[hash_idx]);
+	return 0;
+}
+
+int mesh_pathtbl_init(void)
+{
+	struct mesh_table *tbl_path, *tbl_mpp;
+	int ret;
+
+	tbl_path = mesh_table_alloc(INIT_PATHS_SIZE_ORDER);
+	if (!tbl_path)
+		return -ENOMEM;
+	tbl_path->free_node = &mesh_path_node_free;
+	tbl_path->copy_node = &mesh_path_node_copy;
+	tbl_path->mean_chain_len = MEAN_CHAIN_LEN;
+	tbl_path->known_gates = kzalloc(sizeof(struct hlist_head), GFP_ATOMIC);
+	if (!tbl_path->known_gates) {
+		ret = -ENOMEM;
+		goto free_path;
+	}
+	INIT_HLIST_HEAD(tbl_path->known_gates);
+
+
+	tbl_mpp = mesh_table_alloc(INIT_PATHS_SIZE_ORDER);
+	if (!tbl_mpp) {
+		ret = -ENOMEM;
+		goto free_path;
+	}
+	tbl_mpp->free_node = &mesh_path_node_free;
+	tbl_mpp->copy_node = &mesh_path_node_copy;
+	tbl_mpp->mean_chain_len = MEAN_CHAIN_LEN;
+	tbl_mpp->known_gates = kzalloc(sizeof(struct hlist_head), GFP_ATOMIC);
+	if (!tbl_mpp->known_gates) {
+		ret = -ENOMEM;
+		goto free_mpp;
+	}
+	INIT_HLIST_HEAD(tbl_mpp->known_gates);
+
+	/* Need no locking since this is during init */
+	RCU_INIT_POINTER(mesh_paths, tbl_path);
+	RCU_INIT_POINTER(mpp_paths, tbl_mpp);
+
+	return 0;
+
+free_mpp:
+	mesh_table_free(tbl_mpp, true);
+free_path:
+	mesh_table_free(tbl_path, true);
+	return ret;
+}
+
+void mesh_path_expire(struct ieee80211_sub_if_data *sdata)
+{
+	struct mesh_table *tbl;
+	struct mesh_path *mpath;
+	struct mpath_node *node;
+	int i;
+
+	rcu_read_lock();
+	tbl = rcu_dereference(mesh_paths);
+	for_each_mesh_entry(tbl, node, i) {
+		if (node->mpath->sdata != sdata)
+			continue;
+		mpath = node->mpath;
+		if ((!(mpath->flags & MESH_PATH_RESOLVING)) &&
+		    (!(mpath->flags & MESH_PATH_FIXED)) &&
+		     time_after(jiffies, mpath->exp_time + MESH_PATH_EXPIRE))
+			mesh_path_del(mpath->sdata, mpath->dst);
+	}
+	rcu_read_unlock();
+}
+
+void mesh_pathtbl_unregister(void)
+{
+	/* no need for locking during exit path */
+	mesh_table_free(rcu_dereference_protected(mesh_paths, 1), true);
+	mesh_table_free(rcu_dereference_protected(mpp_paths, 1), true);
+}
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
new file mode 100644
index 0000000..09bebed
--- /dev/null
+++ b/net/mac80211/mesh_plink.c
@@ -0,0 +1,1073 @@
+/*
+ * Copyright (c) 2008, 2009 open80211s Ltd.
+ * Author:     Luis Carlos Cobo <luisca@cozybit.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include "ieee80211_i.h"
+#include "rate.h"
+#include "mesh.h"
+
+#define PLINK_GET_LLID(p) (p + 2)
+#define PLINK_GET_PLID(p) (p + 4)
+
+#define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
+				jiffies + HZ * t / 1000))
+
+/* We only need a valid sta if user configured a minimum rssi_threshold. */
+#define rssi_threshold_check(sta, sdata) \
+		(sdata->u.mesh.mshcfg.rssi_threshold == 0 ||\
+		(sta && (s8) -ewma_read(&sta->avg_signal) > \
+		sdata->u.mesh.mshcfg.rssi_threshold))
+
+enum plink_event {
+	PLINK_UNDEFINED,
+	OPN_ACPT,
+	OPN_RJCT,
+	OPN_IGNR,
+	CNF_ACPT,
+	CNF_RJCT,
+	CNF_IGNR,
+	CLS_ACPT,
+	CLS_IGNR
+};
+
+static const char * const mplstates[] = {
+	[NL80211_PLINK_LISTEN] = "LISTEN",
+	[NL80211_PLINK_OPN_SNT] = "OPN-SNT",
+	[NL80211_PLINK_OPN_RCVD] = "OPN-RCVD",
+	[NL80211_PLINK_CNF_RCVD] = "CNF_RCVD",
+	[NL80211_PLINK_ESTAB] = "ESTAB",
+	[NL80211_PLINK_HOLDING] = "HOLDING",
+	[NL80211_PLINK_BLOCKED] = "BLOCKED"
+};
+
+static const char * const mplevents[] = {
+	[PLINK_UNDEFINED] = "NONE",
+	[OPN_ACPT] = "OPN_ACPT",
+	[OPN_RJCT] = "OPN_RJCT",
+	[OPN_IGNR] = "OPN_IGNR",
+	[CNF_ACPT] = "CNF_ACPT",
+	[CNF_RJCT] = "CNF_RJCT",
+	[CNF_IGNR] = "CNF_IGNR",
+	[CLS_ACPT] = "CLS_ACPT",
+	[CLS_IGNR] = "CLS_IGNR"
+};
+
+static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
+			       enum ieee80211_self_protected_actioncode action,
+			       u8 *da, __le16 llid, __le16 plid, __le16 reason);
+
+/**
+ * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
+ *
+ * @sta: mesh peer link to restart
+ *
+ * Locking: this function must be called holding sta->lock
+ */
+static inline void mesh_plink_fsm_restart(struct sta_info *sta)
+{
+	sta->plink_state = NL80211_PLINK_LISTEN;
+	sta->llid = sta->plid = sta->reason = 0;
+	sta->plink_retries = 0;
+}
+
+/*
+ * mesh_set_short_slot_time - enable / disable ERP short slot time.
+ *
+ * The standard indirectly mandates mesh STAs to turn off short slot time by
+ * disallowing advertising this (802.11-2012 8.4.1.4), but that doesn't mean we
+ * can't be sneaky about it. Enable short slot time if all mesh STAs in the
+ * MBSS support ERP rates.
+ *
+ * Returns BSS_CHANGED_ERP_SLOT or 0 for no change.
+ */
+static u32 mesh_set_short_slot_time(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+	struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
+	struct sta_info *sta;
+	u32 erp_rates = 0, changed = 0;
+	int i;
+	bool short_slot = false;
+
+	if (band == IEEE80211_BAND_5GHZ) {
+		/* (IEEE 802.11-2012 19.4.5) */
+		short_slot = true;
+		goto out;
+	} else if (band != IEEE80211_BAND_2GHZ ||
+		   (band == IEEE80211_BAND_2GHZ &&
+		    local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
+		goto out;
+
+	for (i = 0; i < sband->n_bitrates; i++)
+		if (sband->bitrates[i].flags & IEEE80211_RATE_ERP_G)
+			erp_rates |= BIT(i);
+
+	if (!erp_rates)
+		goto out;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		if (sdata != sta->sdata ||
+		    sta->plink_state != NL80211_PLINK_ESTAB)
+			continue;
+
+		short_slot = false;
+		if (erp_rates & sta->sta.supp_rates[band])
+			short_slot = true;
+		 else
+			break;
+	}
+	rcu_read_unlock();
+
+out:
+	if (sdata->vif.bss_conf.use_short_slot != short_slot) {
+		sdata->vif.bss_conf.use_short_slot = short_slot;
+		changed = BSS_CHANGED_ERP_SLOT;
+		mpl_dbg(sdata, "mesh_plink %pM: ERP short slot time %d\n",
+			sdata->vif.addr, short_slot);
+	}
+	return changed;
+}
+
+/**
+ * mesh_set_ht_prot_mode - set correct HT protection mode
+ *
+ * Section 9.23.3.5 of IEEE 80211-2012 describes the protection rules for HT
+ * mesh STA in a MBSS. Three HT protection modes are supported for now, non-HT
+ * mixed mode, 20MHz-protection and no-protection mode. non-HT mixed mode is
+ * selected if any non-HT peers are present in our MBSS.  20MHz-protection mode
+ * is selected if all peers in our 20/40MHz MBSS support HT and atleast one
+ * HT20 peer is present. Otherwise no-protection mode is selected.
+ */
+static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	u16 ht_opmode;
+	bool non_ht_sta = false, ht20_sta = false;
+
+	if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
+		return 0;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		if (sdata != sta->sdata ||
+		    sta->plink_state != NL80211_PLINK_ESTAB)
+			continue;
+
+		if (sta->sta.bandwidth > IEEE80211_STA_RX_BW_20)
+			continue;
+
+		if (!sta->sta.ht_cap.ht_supported) {
+			mpl_dbg(sdata, "nonHT sta (%pM) is present\n",
+				       sta->sta.addr);
+			non_ht_sta = true;
+			break;
+		}
+
+		mpl_dbg(sdata, "HT20 sta (%pM) is present\n", sta->sta.addr);
+		ht20_sta = true;
+	}
+	rcu_read_unlock();
+
+	if (non_ht_sta)
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED;
+	else if (ht20_sta &&
+		 sdata->vif.bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ;
+	else
+		ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
+
+	if (sdata->vif.bss_conf.ht_operation_mode == ht_opmode)
+		return 0;
+
+	sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
+	sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
+	mpl_dbg(sdata, "selected new HT protection mode %d\n", ht_opmode);
+	return BSS_CHANGED_HT;
+}
+
+/**
+ * __mesh_plink_deactivate - deactivate mesh peer link
+ *
+ * @sta: mesh peer link to deactivate
+ *
+ * All mesh paths with this peer as next hop will be flushed
+ * Returns beacon changed flag if the beacon content changed.
+ *
+ * Locking: the caller must hold sta->lock
+ */
+static u32 __mesh_plink_deactivate(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	u32 changed = 0;
+
+	if (sta->plink_state == NL80211_PLINK_ESTAB)
+		changed = mesh_plink_dec_estab_count(sdata);
+	sta->plink_state = NL80211_PLINK_BLOCKED;
+	mesh_path_flush_by_nexthop(sta);
+
+	ieee80211_mps_sta_status_update(sta);
+	changed |= ieee80211_mps_local_status_update(sdata);
+
+	return changed;
+}
+
+/**
+ * mesh_plink_deactivate - deactivate mesh peer link
+ *
+ * @sta: mesh peer link to deactivate
+ *
+ * All mesh paths with this peer as next hop will be flushed
+ */
+u32 mesh_plink_deactivate(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	u32 changed;
+
+	spin_lock_bh(&sta->lock);
+	changed = __mesh_plink_deactivate(sta);
+	sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED);
+	mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
+			    sta->sta.addr, sta->llid, sta->plid,
+			    sta->reason);
+	spin_unlock_bh(&sta->lock);
+
+	return changed;
+}
+
+static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
+			       enum ieee80211_self_protected_actioncode action,
+			       u8 *da, __le16 llid, __le16 plid, __le16 reason)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_mgmt *mgmt;
+	bool include_plid = false;
+	u16 peering_proto = 0;
+	u8 *pos, ie_len = 4;
+	int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) +
+		      sizeof(mgmt->u.action.u.self_prot);
+	int err = -ENOMEM;
+
+	skb = dev_alloc_skb(local->tx_headroom +
+			    hdr_len +
+			    2 + /* capability info */
+			    2 + /* AID */
+			    2 + 8 + /* supported rates */
+			    2 + (IEEE80211_MAX_SUPP_RATES - 8) +
+			    2 + sdata->u.mesh.mesh_id_len +
+			    2 + sizeof(struct ieee80211_meshconf_ie) +
+			    2 + sizeof(struct ieee80211_ht_cap) +
+			    2 + sizeof(struct ieee80211_ht_operation) +
+			    2 + 8 + /* peering IE */
+			    sdata->u.mesh.ie_len);
+	if (!skb)
+		return -1;
+	info = IEEE80211_SKB_CB(skb);
+	skb_reserve(skb, local->tx_headroom);
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
+	memset(mgmt, 0, hdr_len);
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+	memcpy(mgmt->da, da, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
+	mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED;
+	mgmt->u.action.u.self_prot.action_code = action;
+
+	if (action != WLAN_SP_MESH_PEERING_CLOSE) {
+		enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+
+		/* capability info */
+		pos = skb_put(skb, 2);
+		memset(pos, 0, 2);
+		if (action == WLAN_SP_MESH_PEERING_CONFIRM) {
+			/* AID */
+			pos = skb_put(skb, 2);
+			memcpy(pos + 2, &plid, 2);
+		}
+		if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
+		    ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
+		    mesh_add_rsn_ie(sdata, skb) ||
+		    mesh_add_meshid_ie(sdata, skb) ||
+		    mesh_add_meshconf_ie(sdata, skb))
+			goto free;
+	} else {	/* WLAN_SP_MESH_PEERING_CLOSE */
+		info->flags |= IEEE80211_TX_CTL_NO_ACK;
+		if (mesh_add_meshid_ie(sdata, skb))
+			goto free;
+	}
+
+	/* Add Mesh Peering Management element */
+	switch (action) {
+	case WLAN_SP_MESH_PEERING_OPEN:
+		break;
+	case WLAN_SP_MESH_PEERING_CONFIRM:
+		ie_len += 2;
+		include_plid = true;
+		break;
+	case WLAN_SP_MESH_PEERING_CLOSE:
+		if (plid) {
+			ie_len += 2;
+			include_plid = true;
+		}
+		ie_len += 2;	/* reason code */
+		break;
+	default:
+		err = -EINVAL;
+		goto free;
+	}
+
+	if (WARN_ON(skb_tailroom(skb) < 2 + ie_len))
+		goto free;
+
+	pos = skb_put(skb, 2 + ie_len);
+	*pos++ = WLAN_EID_PEER_MGMT;
+	*pos++ = ie_len;
+	memcpy(pos, &peering_proto, 2);
+	pos += 2;
+	memcpy(pos, &llid, 2);
+	pos += 2;
+	if (include_plid) {
+		memcpy(pos, &plid, 2);
+		pos += 2;
+	}
+	if (action == WLAN_SP_MESH_PEERING_CLOSE) {
+		memcpy(pos, &reason, 2);
+		pos += 2;
+	}
+
+	if (action != WLAN_SP_MESH_PEERING_CLOSE) {
+		if (mesh_add_ht_cap_ie(sdata, skb) ||
+		    mesh_add_ht_oper_ie(sdata, skb))
+			goto free;
+	}
+
+	if (mesh_add_vendor_ies(sdata, skb))
+		goto free;
+
+	ieee80211_tx_skb(sdata, skb);
+	return 0;
+free:
+	kfree_skb(skb);
+	return err;
+}
+
+static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
+			       struct sta_info *sta,
+			       struct ieee802_11_elems *elems, bool insert)
+{
+	struct ieee80211_local *local = sdata->local;
+	enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+	struct ieee80211_supported_band *sband;
+	u32 rates, basic_rates = 0, changed = 0;
+
+	sband = local->hw.wiphy->bands[band];
+	rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates);
+
+	spin_lock_bh(&sta->lock);
+	sta->last_rx = jiffies;
+
+	/* rates and capabilities don't change during peering */
+	if (sta->plink_state == NL80211_PLINK_ESTAB)
+		goto out;
+
+	if (sta->sta.supp_rates[band] != rates)
+		changed |= IEEE80211_RC_SUPP_RATES_CHANGED;
+	sta->sta.supp_rates[band] = rates;
+
+	if (ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
+					      elems->ht_cap_elem, sta))
+		changed |= IEEE80211_RC_BW_CHANGED;
+
+	/* HT peer is operating 20MHz-only */
+	if (elems->ht_operation &&
+	    !(elems->ht_operation->ht_param &
+	      IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
+		if (sta->sta.bandwidth != IEEE80211_STA_RX_BW_20)
+			changed |= IEEE80211_RC_BW_CHANGED;
+		sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
+	}
+
+	if (insert)
+		rate_control_rate_init(sta);
+	else
+		rate_control_rate_update(local, sband, sta, changed);
+out:
+	spin_unlock_bh(&sta->lock);
+}
+
+static struct sta_info *
+__mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr)
+{
+	struct sta_info *sta;
+
+	if (sdata->local->num_sta >= MESH_MAX_PLINKS)
+		return NULL;
+
+	sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
+	if (!sta)
+		return NULL;
+
+	sta->plink_state = NL80211_PLINK_LISTEN;
+
+	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+	sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+
+	set_sta_flag(sta, WLAN_STA_WME);
+
+	return sta;
+}
+
+static struct sta_info *
+mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr,
+		    struct ieee802_11_elems *elems)
+{
+	struct sta_info *sta = NULL;
+
+	/* Userspace handles station allocation */
+	if (sdata->u.mesh.user_mpm ||
+	    sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
+		cfg80211_notify_new_peer_candidate(sdata->dev, addr,
+						   elems->ie_start,
+						   elems->total_len,
+						   GFP_KERNEL);
+	else
+		sta = __mesh_sta_info_alloc(sdata, addr);
+
+	return sta;
+}
+
+/*
+ * mesh_sta_info_get - return mesh sta info entry for @addr.
+ *
+ * @sdata: local meshif
+ * @addr: peer's address
+ * @elems: IEs from beacon or mesh peering frame.
+ *
+ * Return existing or newly allocated sta_info under RCU read lock.
+ * (re)initialize with given IEs.
+ */
+static struct sta_info *
+mesh_sta_info_get(struct ieee80211_sub_if_data *sdata,
+		  u8 *addr, struct ieee802_11_elems *elems) __acquires(RCU)
+{
+	struct sta_info *sta = NULL;
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, addr);
+	if (sta) {
+		mesh_sta_info_init(sdata, sta, elems, false);
+	} else {
+		rcu_read_unlock();
+		/* can't run atomic */
+		sta = mesh_sta_info_alloc(sdata, addr, elems);
+		if (!sta) {
+			rcu_read_lock();
+			return NULL;
+		}
+
+		mesh_sta_info_init(sdata, sta, elems, true);
+
+		if (sta_info_insert_rcu(sta))
+			return NULL;
+	}
+
+	return sta;
+}
+
+/*
+ * mesh_neighbour_update - update or initialize new mesh neighbor.
+ *
+ * @sdata: local meshif
+ * @addr: peer's address
+ * @elems: IEs from beacon or mesh peering frame
+ *
+ * Initiates peering if appropriate.
+ */
+void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
+			   u8 *hw_addr,
+			   struct ieee802_11_elems *elems)
+{
+	struct sta_info *sta;
+	u32 changed = 0;
+
+	sta = mesh_sta_info_get(sdata, hw_addr, elems);
+	if (!sta)
+		goto out;
+
+	if (mesh_peer_accepts_plinks(elems) &&
+	    sta->plink_state == NL80211_PLINK_LISTEN &&
+	    sdata->u.mesh.accepting_plinks &&
+	    sdata->u.mesh.mshcfg.auto_open_plinks &&
+	    rssi_threshold_check(sta, sdata))
+		changed = mesh_plink_open(sta);
+
+	ieee80211_mps_frame_release(sta, elems);
+out:
+	rcu_read_unlock();
+	ieee80211_mbss_info_change_notify(sdata, changed);
+}
+
+static void mesh_plink_timer(unsigned long data)
+{
+	struct sta_info *sta;
+	__le16 llid, plid, reason;
+	struct ieee80211_sub_if_data *sdata;
+	struct mesh_config *mshcfg;
+
+	/*
+	 * This STA is valid because sta_info_destroy() will
+	 * del_timer_sync() this timer after having made sure
+	 * it cannot be readded (by deleting the plink.)
+	 */
+	sta = (struct sta_info *) data;
+
+	if (sta->sdata->local->quiescing)
+		return;
+
+	spin_lock_bh(&sta->lock);
+	if (sta->ignore_plink_timer) {
+		sta->ignore_plink_timer = false;
+		spin_unlock_bh(&sta->lock);
+		return;
+	}
+	mpl_dbg(sta->sdata,
+		"Mesh plink timer for %pM fired on state %s\n",
+		sta->sta.addr, mplstates[sta->plink_state]);
+	reason = 0;
+	llid = sta->llid;
+	plid = sta->plid;
+	sdata = sta->sdata;
+	mshcfg = &sdata->u.mesh.mshcfg;
+
+	switch (sta->plink_state) {
+	case NL80211_PLINK_OPN_RCVD:
+	case NL80211_PLINK_OPN_SNT:
+		/* retry timer */
+		if (sta->plink_retries < mshcfg->dot11MeshMaxRetries) {
+			u32 rand;
+			mpl_dbg(sta->sdata,
+				"Mesh plink for %pM (retry, timeout): %d %d\n",
+				sta->sta.addr, sta->plink_retries,
+				sta->plink_timeout);
+			get_random_bytes(&rand, sizeof(u32));
+			sta->plink_timeout = sta->plink_timeout +
+					     rand % sta->plink_timeout;
+			++sta->plink_retries;
+			mod_plink_timer(sta, sta->plink_timeout);
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
+					    sta->sta.addr, llid, 0, 0);
+			break;
+		}
+		reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES);
+		/* fall through on else */
+	case NL80211_PLINK_CNF_RCVD:
+		/* confirm timer */
+		if (!reason)
+			reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT);
+		sta->plink_state = NL80211_PLINK_HOLDING;
+		mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
+		spin_unlock_bh(&sta->lock);
+		mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
+				    sta->sta.addr, llid, plid, reason);
+		break;
+	case NL80211_PLINK_HOLDING:
+		/* holding timer */
+		del_timer(&sta->plink_timer);
+		mesh_plink_fsm_restart(sta);
+		spin_unlock_bh(&sta->lock);
+		break;
+	default:
+		spin_unlock_bh(&sta->lock);
+		break;
+	}
+}
+
+static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
+{
+	sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
+	sta->plink_timer.data = (unsigned long) sta;
+	sta->plink_timer.function = mesh_plink_timer;
+	sta->plink_timeout = timeout;
+	add_timer(&sta->plink_timer);
+}
+
+u32 mesh_plink_open(struct sta_info *sta)
+{
+	__le16 llid;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	u32 changed;
+
+	if (!test_sta_flag(sta, WLAN_STA_AUTH))
+		return 0;
+
+	spin_lock_bh(&sta->lock);
+	get_random_bytes(&llid, 2);
+	sta->llid = llid;
+	if (sta->plink_state != NL80211_PLINK_LISTEN &&
+	    sta->plink_state != NL80211_PLINK_BLOCKED) {
+		spin_unlock_bh(&sta->lock);
+		return 0;
+	}
+	sta->plink_state = NL80211_PLINK_OPN_SNT;
+	mesh_plink_timer_set(sta, sdata->u.mesh.mshcfg.dot11MeshRetryTimeout);
+	spin_unlock_bh(&sta->lock);
+	mpl_dbg(sdata,
+		"Mesh plink: starting establishment with %pM\n",
+		sta->sta.addr);
+
+	/* set the non-peer mode to active during peering */
+	changed = ieee80211_mps_local_status_update(sdata);
+
+	mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
+			    sta->sta.addr, llid, 0, 0);
+	return changed;
+}
+
+u32 mesh_plink_block(struct sta_info *sta)
+{
+	u32 changed;
+
+	spin_lock_bh(&sta->lock);
+	changed = __mesh_plink_deactivate(sta);
+	sta->plink_state = NL80211_PLINK_BLOCKED;
+	spin_unlock_bh(&sta->lock);
+
+	return changed;
+}
+
+
+void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
+			 struct ieee80211_mgmt *mgmt, size_t len,
+			 struct ieee80211_rx_status *rx_status)
+{
+	struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg;
+	struct ieee802_11_elems elems;
+	struct sta_info *sta;
+	enum plink_event event;
+	enum ieee80211_self_protected_actioncode ftype;
+	size_t baselen;
+	bool matches_local = true;
+	u8 ie_len;
+	u8 *baseaddr;
+	u32 changed = 0;
+	__le16 plid, llid, reason;
+
+	/* need action_code, aux */
+	if (len < IEEE80211_MIN_ACTION_SIZE + 3)
+		return;
+
+	if (sdata->u.mesh.user_mpm)
+		/* userspace must register for these */
+		return;
+
+	if (is_multicast_ether_addr(mgmt->da)) {
+		mpl_dbg(sdata,
+			"Mesh plink: ignore frame from multicast address\n");
+		return;
+	}
+
+	baseaddr = mgmt->u.action.u.self_prot.variable;
+	baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt;
+	if (mgmt->u.action.u.self_prot.action_code ==
+						WLAN_SP_MESH_PEERING_CONFIRM) {
+		baseaddr += 4;
+		baselen += 4;
+	}
+	ieee802_11_parse_elems(baseaddr, len - baselen, true, &elems);
+
+	if (!elems.peering) {
+		mpl_dbg(sdata,
+			"Mesh plink: missing necessary peer link ie\n");
+		return;
+	}
+
+	if (elems.rsn_len &&
+	    sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) {
+		mpl_dbg(sdata,
+			"Mesh plink: can't establish link with secure peer\n");
+		return;
+	}
+
+	ftype = mgmt->u.action.u.self_prot.action_code;
+	ie_len = elems.peering_len;
+	if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) ||
+	    (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) ||
+	    (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6
+							&& ie_len != 8)) {
+		mpl_dbg(sdata,
+			"Mesh plink: incorrect plink ie length %d %d\n",
+			ftype, ie_len);
+		return;
+	}
+
+	if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
+	    (!elems.mesh_id || !elems.mesh_config)) {
+		mpl_dbg(sdata, "Mesh plink: missing necessary ie\n");
+		return;
+	}
+	/* Note the lines below are correct, the llid in the frame is the plid
+	 * from the point of view of this host.
+	 */
+	memcpy(&plid, PLINK_GET_LLID(elems.peering), 2);
+	if (ftype == WLAN_SP_MESH_PEERING_CONFIRM ||
+	    (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8))
+		memcpy(&llid, PLINK_GET_PLID(elems.peering), 2);
+
+	/* WARNING: Only for sta pointer, is dropped & re-acquired */
+	rcu_read_lock();
+
+	sta = sta_info_get(sdata, mgmt->sa);
+	if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) {
+		mpl_dbg(sdata, "Mesh plink: cls or cnf from unknown peer\n");
+		rcu_read_unlock();
+		return;
+	}
+
+	if (ftype == WLAN_SP_MESH_PEERING_OPEN &&
+	    !rssi_threshold_check(sta, sdata)) {
+		mpl_dbg(sdata, "Mesh plink: %pM does not meet rssi threshold\n",
+			mgmt->sa);
+		rcu_read_unlock();
+		return;
+	}
+
+	if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) {
+		mpl_dbg(sdata, "Mesh plink: Action frame from non-authed peer\n");
+		rcu_read_unlock();
+		return;
+	}
+
+	if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) {
+		rcu_read_unlock();
+		return;
+	}
+
+	/* Now we will figure out the appropriate event... */
+	event = PLINK_UNDEFINED;
+	if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
+	    !mesh_matches_local(sdata, &elems)) {
+		matches_local = false;
+		switch (ftype) {
+		case WLAN_SP_MESH_PEERING_OPEN:
+			event = OPN_RJCT;
+			break;
+		case WLAN_SP_MESH_PEERING_CONFIRM:
+			event = CNF_RJCT;
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (!sta && !matches_local) {
+		rcu_read_unlock();
+		reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
+		llid = 0;
+		mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
+				    mgmt->sa, llid, plid, reason);
+		return;
+	} else if (!sta) {
+		/* ftype == WLAN_SP_MESH_PEERING_OPEN */
+		if (!mesh_plink_free_count(sdata)) {
+			mpl_dbg(sdata, "Mesh plink error: no more free plinks\n");
+			rcu_read_unlock();
+			return;
+		}
+		event = OPN_ACPT;
+	} else if (matches_local) {
+		switch (ftype) {
+		case WLAN_SP_MESH_PEERING_OPEN:
+			if (!mesh_plink_free_count(sdata) ||
+			    (sta->plid && sta->plid != plid))
+				event = OPN_IGNR;
+			else
+				event = OPN_ACPT;
+			break;
+		case WLAN_SP_MESH_PEERING_CONFIRM:
+			if (!mesh_plink_free_count(sdata) ||
+			    (sta->llid != llid || sta->plid != plid))
+				event = CNF_IGNR;
+			else
+				event = CNF_ACPT;
+			break;
+		case WLAN_SP_MESH_PEERING_CLOSE:
+			if (sta->plink_state == NL80211_PLINK_ESTAB)
+				/* Do not check for llid or plid. This does not
+				 * follow the standard but since multiple plinks
+				 * per sta are not supported, it is necessary in
+				 * order to avoid a livelock when MP A sees an
+				 * establish peer link to MP B but MP B does not
+				 * see it. This can be caused by a timeout in
+				 * B's peer link establishment or B beign
+				 * restarted.
+				 */
+				event = CLS_ACPT;
+			else if (sta->plid != plid)
+				event = CLS_IGNR;
+			else if (ie_len == 7 && sta->llid != llid)
+				event = CLS_IGNR;
+			else
+				event = CLS_ACPT;
+			break;
+		default:
+			mpl_dbg(sdata, "Mesh plink: unknown frame subtype\n");
+			rcu_read_unlock();
+			return;
+		}
+	}
+
+	if (event == OPN_ACPT) {
+		rcu_read_unlock();
+		/* allocate sta entry if necessary and update info */
+		sta = mesh_sta_info_get(sdata, mgmt->sa, &elems);
+		if (!sta) {
+			mpl_dbg(sdata, "Mesh plink: failed to init peer!\n");
+			rcu_read_unlock();
+			return;
+		}
+	}
+
+	mpl_dbg(sdata, "peer %pM in state %s got event %s\n", mgmt->sa,
+		       mplstates[sta->plink_state], mplevents[event]);
+	reason = 0;
+	spin_lock_bh(&sta->lock);
+	switch (sta->plink_state) {
+		/* spin_unlock as soon as state is updated at each case */
+	case NL80211_PLINK_LISTEN:
+		switch (event) {
+		case CLS_ACPT:
+			mesh_plink_fsm_restart(sta);
+			spin_unlock_bh(&sta->lock);
+			break;
+		case OPN_ACPT:
+			sta->plink_state = NL80211_PLINK_OPN_RCVD;
+			sta->plid = plid;
+			get_random_bytes(&llid, 2);
+			sta->llid = llid;
+			mesh_plink_timer_set(sta,
+					     mshcfg->dot11MeshRetryTimeout);
+
+			/* set the non-peer mode to active during peering */
+			changed |= ieee80211_mps_local_status_update(sdata);
+
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_OPEN,
+					    sta->sta.addr, llid, 0, 0);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_CONFIRM,
+					    sta->sta.addr, llid, plid, 0);
+			break;
+		default:
+			spin_unlock_bh(&sta->lock);
+			break;
+		}
+		break;
+
+	case NL80211_PLINK_OPN_SNT:
+		switch (event) {
+		case OPN_RJCT:
+		case CNF_RJCT:
+			reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
+		case CLS_ACPT:
+			if (!reason)
+				reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
+			sta->reason = reason;
+			sta->plink_state = NL80211_PLINK_HOLDING;
+			if (!mod_plink_timer(sta,
+					     mshcfg->dot11MeshHoldingTimeout))
+				sta->ignore_plink_timer = true;
+
+			llid = sta->llid;
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_CLOSE,
+					    sta->sta.addr, llid, plid, reason);
+			break;
+		case OPN_ACPT:
+			/* retry timer is left untouched */
+			sta->plink_state = NL80211_PLINK_OPN_RCVD;
+			sta->plid = plid;
+			llid = sta->llid;
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_CONFIRM,
+					    sta->sta.addr, llid, plid, 0);
+			break;
+		case CNF_ACPT:
+			sta->plink_state = NL80211_PLINK_CNF_RCVD;
+			if (!mod_plink_timer(sta,
+					     mshcfg->dot11MeshConfirmTimeout))
+				sta->ignore_plink_timer = true;
+
+			spin_unlock_bh(&sta->lock);
+			break;
+		default:
+			spin_unlock_bh(&sta->lock);
+			break;
+		}
+		break;
+
+	case NL80211_PLINK_OPN_RCVD:
+		switch (event) {
+		case OPN_RJCT:
+		case CNF_RJCT:
+			reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
+		case CLS_ACPT:
+			if (!reason)
+				reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
+			sta->reason = reason;
+			sta->plink_state = NL80211_PLINK_HOLDING;
+			if (!mod_plink_timer(sta,
+					     mshcfg->dot11MeshHoldingTimeout))
+				sta->ignore_plink_timer = true;
+
+			llid = sta->llid;
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
+					    sta->sta.addr, llid, plid, reason);
+			break;
+		case OPN_ACPT:
+			llid = sta->llid;
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_CONFIRM,
+					    sta->sta.addr, llid, plid, 0);
+			break;
+		case CNF_ACPT:
+			del_timer(&sta->plink_timer);
+			sta->plink_state = NL80211_PLINK_ESTAB;
+			spin_unlock_bh(&sta->lock);
+			changed |= mesh_plink_inc_estab_count(sdata);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= mesh_set_short_slot_time(sdata);
+			mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
+				sta->sta.addr);
+			ieee80211_mps_sta_status_update(sta);
+			changed |= ieee80211_mps_set_sta_local_pm(sta,
+						       mshcfg->power_mode);
+			break;
+		default:
+			spin_unlock_bh(&sta->lock);
+			break;
+		}
+		break;
+
+	case NL80211_PLINK_CNF_RCVD:
+		switch (event) {
+		case OPN_RJCT:
+		case CNF_RJCT:
+			reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
+		case CLS_ACPT:
+			if (!reason)
+				reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
+			sta->reason = reason;
+			sta->plink_state = NL80211_PLINK_HOLDING;
+			if (!mod_plink_timer(sta,
+					     mshcfg->dot11MeshHoldingTimeout))
+				sta->ignore_plink_timer = true;
+
+			llid = sta->llid;
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_CLOSE,
+					    sta->sta.addr, llid, plid, reason);
+			break;
+		case OPN_ACPT:
+			del_timer(&sta->plink_timer);
+			sta->plink_state = NL80211_PLINK_ESTAB;
+			spin_unlock_bh(&sta->lock);
+			changed |= mesh_plink_inc_estab_count(sdata);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= mesh_set_short_slot_time(sdata);
+			mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
+				sta->sta.addr);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_CONFIRM,
+					    sta->sta.addr, llid, plid, 0);
+			ieee80211_mps_sta_status_update(sta);
+			changed |= ieee80211_mps_set_sta_local_pm(sta,
+							mshcfg->power_mode);
+			break;
+		default:
+			spin_unlock_bh(&sta->lock);
+			break;
+		}
+		break;
+
+	case NL80211_PLINK_ESTAB:
+		switch (event) {
+		case CLS_ACPT:
+			reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
+			sta->reason = reason;
+			changed |= __mesh_plink_deactivate(sta);
+			sta->plink_state = NL80211_PLINK_HOLDING;
+			llid = sta->llid;
+			mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
+			spin_unlock_bh(&sta->lock);
+			changed |= mesh_set_ht_prot_mode(sdata);
+			changed |= mesh_set_short_slot_time(sdata);
+			mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
+					    sta->sta.addr, llid, plid, reason);
+			break;
+		case OPN_ACPT:
+			llid = sta->llid;
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata,
+					    WLAN_SP_MESH_PEERING_CONFIRM,
+					    sta->sta.addr, llid, plid, 0);
+			break;
+		default:
+			spin_unlock_bh(&sta->lock);
+			break;
+		}
+		break;
+	case NL80211_PLINK_HOLDING:
+		switch (event) {
+		case CLS_ACPT:
+			if (del_timer(&sta->plink_timer))
+				sta->ignore_plink_timer = 1;
+			mesh_plink_fsm_restart(sta);
+			spin_unlock_bh(&sta->lock);
+			break;
+		case OPN_ACPT:
+		case CNF_ACPT:
+		case OPN_RJCT:
+		case CNF_RJCT:
+			llid = sta->llid;
+			reason = sta->reason;
+			spin_unlock_bh(&sta->lock);
+			mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
+					    sta->sta.addr, llid, plid, reason);
+			break;
+		default:
+			spin_unlock_bh(&sta->lock);
+		}
+		break;
+	default:
+		/* should not get here, PLINK_BLOCKED is dealt with at the
+		 * beginning of the function
+		 */
+		spin_unlock_bh(&sta->lock);
+		break;
+	}
+
+	rcu_read_unlock();
+
+	if (changed)
+		ieee80211_mbss_info_change_notify(sdata, changed);
+}
diff --git a/net/mac80211/mesh_ps.c b/net/mac80211/mesh_ps.c
new file mode 100644
index 0000000..3b7bfc0
--- /dev/null
+++ b/net/mac80211/mesh_ps.c
@@ -0,0 +1,598 @@
+/*
+ * Copyright 2012-2013, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de>
+ * Copyright 2012-2013, cozybit Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "mesh.h"
+#include "wme.h"
+
+
+/* mesh PS management */
+
+/**
+ * mps_qos_null_get - create pre-addressed QoS Null frame for mesh powersave
+ */
+static struct sk_buff *mps_qos_null_get(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_hdr *nullfunc; /* use 4addr header */
+	struct sk_buff *skb;
+	int size = sizeof(*nullfunc);
+	__le16 fc;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + size + 2);
+	if (!skb)
+		return NULL;
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	nullfunc = (struct ieee80211_hdr *) skb_put(skb, size);
+	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
+	ieee80211_fill_mesh_addresses(nullfunc, &fc, sta->sta.addr,
+				      sdata->vif.addr);
+	nullfunc->frame_control = fc;
+	nullfunc->duration_id = 0;
+	/* no address resolution for this frame -> set addr 1 immediately */
+	memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
+	memset(skb_put(skb, 2), 0, 2); /* append QoS control field */
+	ieee80211_mps_set_frame_flags(sdata, sta, nullfunc);
+
+	return skb;
+}
+
+/**
+ * mps_qos_null_tx - send a QoS Null to indicate link-specific power mode
+ */
+static void mps_qos_null_tx(struct sta_info *sta)
+{
+	struct sk_buff *skb;
+
+	skb = mps_qos_null_get(sta);
+	if (!skb)
+		return;
+
+	mps_dbg(sta->sdata, "announcing peer-specific power mode to %pM\n",
+		sta->sta.addr);
+
+	/* don't unintentionally start a MPSP */
+	if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
+		u8 *qc = ieee80211_get_qos_ctl((void *) skb->data);
+
+		qc[0] |= IEEE80211_QOS_CTL_EOSP;
+	}
+
+	ieee80211_tx_skb(sta->sdata, skb);
+}
+
+/**
+ * ieee80211_mps_local_status_update - track status of local link-specific PMs
+ *
+ * @sdata: local mesh subif
+ *
+ * sets the non-peer power mode and triggers the driver PS (re-)configuration
+ * Return BSS_CHANGED_BEACON if a beacon update is necessary.
+ */
+u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct sta_info *sta;
+	bool peering = false;
+	int light_sleep_cnt = 0;
+	int deep_sleep_cnt = 0;
+	u32 changed = 0;
+	enum nl80211_mesh_power_mode nonpeer_pm;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
+		if (sdata != sta->sdata)
+			continue;
+
+		switch (sta->plink_state) {
+		case NL80211_PLINK_OPN_SNT:
+		case NL80211_PLINK_OPN_RCVD:
+		case NL80211_PLINK_CNF_RCVD:
+			peering = true;
+			break;
+		case NL80211_PLINK_ESTAB:
+			if (sta->local_pm == NL80211_MESH_POWER_LIGHT_SLEEP)
+				light_sleep_cnt++;
+			else if (sta->local_pm == NL80211_MESH_POWER_DEEP_SLEEP)
+				deep_sleep_cnt++;
+			break;
+		default:
+			break;
+		}
+	}
+	rcu_read_unlock();
+
+	/*
+	 * Set non-peer mode to active during peering/scanning/authentication
+	 * (see IEEE802.11-2012 13.14.8.3). The non-peer mesh power mode is
+	 * deep sleep if the local STA is in light or deep sleep towards at
+	 * least one mesh peer (see 13.14.3.1). Otherwise, set it to the
+	 * user-configured default value.
+	 */
+	if (peering) {
+		mps_dbg(sdata, "setting non-peer PM to active for peering\n");
+		nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
+	} else if (light_sleep_cnt || deep_sleep_cnt) {
+		mps_dbg(sdata, "setting non-peer PM to deep sleep\n");
+		nonpeer_pm = NL80211_MESH_POWER_DEEP_SLEEP;
+	} else {
+		mps_dbg(sdata, "setting non-peer PM to user value\n");
+		nonpeer_pm = ifmsh->mshcfg.power_mode;
+	}
+
+	/* need update if sleep counts move between 0 and non-zero */
+	if (ifmsh->nonpeer_pm != nonpeer_pm ||
+	    !ifmsh->ps_peers_light_sleep != !light_sleep_cnt ||
+	    !ifmsh->ps_peers_deep_sleep != !deep_sleep_cnt)
+		changed = BSS_CHANGED_BEACON;
+
+	ifmsh->nonpeer_pm = nonpeer_pm;
+	ifmsh->ps_peers_light_sleep = light_sleep_cnt;
+	ifmsh->ps_peers_deep_sleep = deep_sleep_cnt;
+
+	return changed;
+}
+
+/**
+ * ieee80211_mps_set_sta_local_pm - set local PM towards a mesh STA
+ *
+ * @sta: mesh STA
+ * @pm: the power mode to set
+ * Return BSS_CHANGED_BEACON if a beacon update is in order.
+ */
+u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta,
+				   enum nl80211_mesh_power_mode pm)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+
+	mps_dbg(sdata, "local STA operates in mode %d with %pM\n",
+		pm, sta->sta.addr);
+
+	sta->local_pm = pm;
+
+	/*
+	 * announce peer-specific power mode transition
+	 * (see IEEE802.11-2012 13.14.3.2 and 13.14.3.3)
+	 */
+	if (sta->plink_state == NL80211_PLINK_ESTAB)
+		mps_qos_null_tx(sta);
+
+	return ieee80211_mps_local_status_update(sdata);
+}
+
+/**
+ * ieee80211_mps_set_frame_flags - set mesh PS flags in FC (and QoS Control)
+ *
+ * @sdata: local mesh subif
+ * @sta: mesh STA
+ * @hdr: 802.11 frame header
+ *
+ * see IEEE802.11-2012 8.2.4.1.7 and 8.2.4.5.11
+ *
+ * NOTE: sta must be given when an individually-addressed QoS frame header
+ * is handled, for group-addressed and management frames it is not used
+ */
+void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata,
+				   struct sta_info *sta,
+				   struct ieee80211_hdr *hdr)
+{
+	enum nl80211_mesh_power_mode pm;
+	u8 *qc;
+
+	if (WARN_ON(is_unicast_ether_addr(hdr->addr1) &&
+		    ieee80211_is_data_qos(hdr->frame_control) &&
+		    !sta))
+		return;
+
+	if (is_unicast_ether_addr(hdr->addr1) &&
+	    ieee80211_is_data_qos(hdr->frame_control) &&
+	    sta->plink_state == NL80211_PLINK_ESTAB)
+		pm = sta->local_pm;
+	else
+		pm = sdata->u.mesh.nonpeer_pm;
+
+	if (pm == NL80211_MESH_POWER_ACTIVE)
+		hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_PM);
+	else
+		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
+
+	if (!ieee80211_is_data_qos(hdr->frame_control))
+		return;
+
+	qc = ieee80211_get_qos_ctl(hdr);
+
+	if ((is_unicast_ether_addr(hdr->addr1) &&
+	     pm == NL80211_MESH_POWER_DEEP_SLEEP) ||
+	    (is_multicast_ether_addr(hdr->addr1) &&
+	     sdata->u.mesh.ps_peers_deep_sleep > 0))
+		qc[1] |= (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8);
+	else
+		qc[1] &= ~(IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8);
+}
+
+/**
+ * ieee80211_mps_sta_status_update - update buffering status of neighbor STA
+ *
+ * @sta: mesh STA
+ *
+ * called after change of peering status or non-peer/peer-specific power mode
+ */
+void ieee80211_mps_sta_status_update(struct sta_info *sta)
+{
+	enum nl80211_mesh_power_mode pm;
+	bool do_buffer;
+
+	/*
+	 * use peer-specific power mode if peering is established and the
+	 * peer's power mode is known
+	 */
+	if (sta->plink_state == NL80211_PLINK_ESTAB &&
+	    sta->peer_pm != NL80211_MESH_POWER_UNKNOWN)
+		pm = sta->peer_pm;
+	else
+		pm = sta->nonpeer_pm;
+
+	do_buffer = (pm != NL80211_MESH_POWER_ACTIVE);
+
+	/* Don't let the same PS state be set twice */
+	if (test_sta_flag(sta, WLAN_STA_PS_STA) == do_buffer)
+		return;
+
+	if (do_buffer) {
+		set_sta_flag(sta, WLAN_STA_PS_STA);
+		atomic_inc(&sta->sdata->u.mesh.ps.num_sta_ps);
+		mps_dbg(sta->sdata, "start PS buffering frames towards %pM\n",
+			sta->sta.addr);
+	} else {
+		ieee80211_sta_ps_deliver_wakeup(sta);
+	}
+
+	/* clear the MPSP flags for non-peers or active STA */
+	if (sta->plink_state != NL80211_PLINK_ESTAB) {
+		clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
+		clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
+	} else if (!do_buffer) {
+		clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
+	}
+}
+
+static void mps_set_sta_peer_pm(struct sta_info *sta,
+				struct ieee80211_hdr *hdr)
+{
+	enum nl80211_mesh_power_mode pm;
+	u8 *qc = ieee80211_get_qos_ctl(hdr);
+
+	/*
+	 * Test Power Management field of frame control (PW) and
+	 * mesh power save level subfield of QoS control field (PSL)
+	 *
+	 * | PM | PSL| Mesh PM |
+	 * +----+----+---------+
+	 * | 0  |Rsrv|  Active |
+	 * | 1  | 0  |  Light  |
+	 * | 1  | 1  |  Deep   |
+	 */
+	if (ieee80211_has_pm(hdr->frame_control)) {
+		if (qc[1] & (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8))
+			pm = NL80211_MESH_POWER_DEEP_SLEEP;
+		else
+			pm = NL80211_MESH_POWER_LIGHT_SLEEP;
+	} else {
+		pm = NL80211_MESH_POWER_ACTIVE;
+	}
+
+	if (sta->peer_pm == pm)
+		return;
+
+	mps_dbg(sta->sdata, "STA %pM enters mode %d\n",
+		sta->sta.addr, pm);
+
+	sta->peer_pm = pm;
+
+	ieee80211_mps_sta_status_update(sta);
+}
+
+static void mps_set_sta_nonpeer_pm(struct sta_info *sta,
+				   struct ieee80211_hdr *hdr)
+{
+	enum nl80211_mesh_power_mode pm;
+
+	if (ieee80211_has_pm(hdr->frame_control))
+		pm = NL80211_MESH_POWER_DEEP_SLEEP;
+	else
+		pm = NL80211_MESH_POWER_ACTIVE;
+
+	if (sta->nonpeer_pm == pm)
+		return;
+
+	mps_dbg(sta->sdata, "STA %pM sets non-peer mode to %d\n",
+		sta->sta.addr, pm);
+
+	sta->nonpeer_pm = pm;
+
+	ieee80211_mps_sta_status_update(sta);
+}
+
+/**
+ * ieee80211_mps_rx_h_sta_process - frame receive handler for mesh powersave
+ *
+ * @sta: STA info that transmitted the frame
+ * @hdr: IEEE 802.11 (QoS) Header
+ */
+void ieee80211_mps_rx_h_sta_process(struct sta_info *sta,
+				    struct ieee80211_hdr *hdr)
+{
+	if (is_unicast_ether_addr(hdr->addr1) &&
+	    ieee80211_is_data_qos(hdr->frame_control)) {
+		/*
+		 * individually addressed QoS Data/Null frames contain
+		 * peer link-specific PS mode towards the local STA
+		 */
+		mps_set_sta_peer_pm(sta, hdr);
+
+		/* check for mesh Peer Service Period trigger frames */
+		ieee80211_mpsp_trigger_process(ieee80211_get_qos_ctl(hdr),
+					       sta, false, false);
+	} else {
+		/*
+		 * can only determine non-peer PS mode
+		 * (see IEEE802.11-2012 8.2.4.1.7)
+		 */
+		mps_set_sta_nonpeer_pm(sta, hdr);
+	}
+}
+
+
+/* mesh PS frame release */
+
+static void mpsp_trigger_send(struct sta_info *sta, bool rspi, bool eosp)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct sk_buff *skb;
+	struct ieee80211_hdr *nullfunc;
+	struct ieee80211_tx_info *info;
+	u8 *qc;
+
+	skb = mps_qos_null_get(sta);
+	if (!skb)
+		return;
+
+	nullfunc = (struct ieee80211_hdr *) skb->data;
+	if (!eosp)
+		nullfunc->frame_control |=
+				cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+	/*
+	 * | RSPI | EOSP |  MPSP triggering   |
+	 * +------+------+--------------------+
+	 * |  0   |  0   | local STA is owner |
+	 * |  0   |  1   | no MPSP (MPSP end) |
+	 * |  1   |  0   | both STA are owner |
+	 * |  1   |  1   | peer STA is owner  | see IEEE802.11-2012 13.14.9.2
+	 */
+	qc = ieee80211_get_qos_ctl(nullfunc);
+	if (rspi)
+		qc[1] |= (IEEE80211_QOS_CTL_RSPI >> 8);
+	if (eosp)
+		qc[0] |= IEEE80211_QOS_CTL_EOSP;
+
+	info = IEEE80211_SKB_CB(skb);
+
+	info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
+		       IEEE80211_TX_CTL_REQ_TX_STATUS;
+
+	mps_dbg(sdata, "sending MPSP trigger%s%s to %pM\n",
+		rspi ? " RSPI" : "", eosp ? " EOSP" : "", sta->sta.addr);
+
+	ieee80211_tx_skb(sdata, skb);
+}
+
+/**
+ * mpsp_qos_null_append - append QoS Null frame to MPSP skb queue if needed
+ *
+ * To properly end a mesh MPSP the last transmitted frame has to set the EOSP
+ * flag in the QoS Control field. In case the current tailing frame is not a
+ * QoS Data frame, append a QoS Null to carry the flag.
+ */
+static void mpsp_qos_null_append(struct sta_info *sta,
+				 struct sk_buff_head *frames)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct sk_buff *new_skb, *skb = skb_peek_tail(frames);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_tx_info *info;
+
+	if (ieee80211_is_data_qos(hdr->frame_control))
+		return;
+
+	new_skb = mps_qos_null_get(sta);
+	if (!new_skb)
+		return;
+
+	mps_dbg(sdata, "appending QoS Null in MPSP towards %pM\n",
+		sta->sta.addr);
+	/*
+	 * This frame has to be transmitted last. Assign lowest priority to
+	 * make sure it cannot pass other frames when releasing multiple ACs.
+	 */
+	new_skb->priority = 1;
+	skb_set_queue_mapping(new_skb, IEEE80211_AC_BK);
+	ieee80211_set_qos_hdr(sdata, new_skb);
+
+	info = IEEE80211_SKB_CB(new_skb);
+	info->control.vif = &sdata->vif;
+	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+
+	__skb_queue_tail(frames, new_skb);
+}
+
+/**
+ * mps_frame_deliver - transmit frames during mesh powersave
+ *
+ * @sta: STA info to transmit to
+ * @n_frames: number of frames to transmit. -1 for all
+ */
+static void mps_frame_deliver(struct sta_info *sta, int n_frames)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	int ac;
+	struct sk_buff_head frames;
+	struct sk_buff *skb;
+	bool more_data = false;
+
+	skb_queue_head_init(&frames);
+
+	/* collect frame(s) from buffers */
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		while (n_frames != 0) {
+			skb = skb_dequeue(&sta->tx_filtered[ac]);
+			if (!skb) {
+				skb = skb_dequeue(
+					&sta->ps_tx_buf[ac]);
+				if (skb)
+					local->total_ps_buffered--;
+			}
+			if (!skb)
+				break;
+			n_frames--;
+			__skb_queue_tail(&frames, skb);
+		}
+
+		if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
+		    !skb_queue_empty(&sta->ps_tx_buf[ac]))
+			more_data = true;
+	}
+
+	/* nothing to send? -> EOSP */
+	if (skb_queue_empty(&frames)) {
+		mpsp_trigger_send(sta, false, true);
+		return;
+	}
+
+	/* in a MPSP make sure the last skb is a QoS Data frame */
+	if (test_sta_flag(sta, WLAN_STA_MPSP_OWNER))
+		mpsp_qos_null_append(sta, &frames);
+
+	mps_dbg(sta->sdata, "sending %d frames to PS STA %pM\n",
+		skb_queue_len(&frames), sta->sta.addr);
+
+	/* prepare collected frames for transmission */
+	skb_queue_walk(&frames, skb) {
+		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+		struct ieee80211_hdr *hdr = (void *) skb->data;
+
+		/*
+		 * Tell TX path to send this frame even though the
+		 * STA may still remain is PS mode after this frame
+		 * exchange.
+		 */
+		info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
+
+		if (more_data || !skb_queue_is_last(&frames, skb))
+			hdr->frame_control |=
+				cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+		else
+			hdr->frame_control &=
+				cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
+
+		if (skb_queue_is_last(&frames, skb) &&
+		    ieee80211_is_data_qos(hdr->frame_control)) {
+			u8 *qoshdr = ieee80211_get_qos_ctl(hdr);
+
+			/* MPSP trigger frame ends service period */
+			*qoshdr |= IEEE80211_QOS_CTL_EOSP;
+			info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+		}
+	}
+
+	ieee80211_add_pending_skbs(local, &frames);
+	sta_info_recalc_tim(sta);
+}
+
+/**
+ * ieee80211_mpsp_trigger_process - track status of mesh Peer Service Periods
+ *
+ * @qc: QoS Control field
+ * @sta: peer to start a MPSP with
+ * @tx: frame was transmitted by the local STA
+ * @acked: frame has been transmitted successfully
+ *
+ * NOTE: active mode STA may only serve as MPSP owner
+ */
+void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta,
+				    bool tx, bool acked)
+{
+	u8 rspi = qc[1] & (IEEE80211_QOS_CTL_RSPI >> 8);
+	u8 eosp = qc[0] & IEEE80211_QOS_CTL_EOSP;
+
+	if (tx) {
+		if (rspi && acked)
+			set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
+
+		if (eosp)
+			clear_sta_flag(sta, WLAN_STA_MPSP_OWNER);
+		else if (acked &&
+			 test_sta_flag(sta, WLAN_STA_PS_STA) &&
+			 !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER))
+			mps_frame_deliver(sta, -1);
+	} else {
+		if (eosp)
+			clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
+		else if (sta->local_pm != NL80211_MESH_POWER_ACTIVE)
+			set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT);
+
+		if (rspi && !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER))
+			mps_frame_deliver(sta, -1);
+	}
+}
+
+/**
+ * ieee80211_mps_frame_release - release buffered frames in response to beacon
+ *
+ * @sta: mesh STA
+ * @elems: beacon IEs
+ *
+ * For peers if we have individually-addressed frames buffered or the peer
+ * indicates buffered frames, send a corresponding MPSP trigger frame. Since
+ * we do not evaluate the awake window duration, QoS Nulls are used as MPSP
+ * trigger frames. If the neighbour STA is not a peer, only send single frames.
+ */
+void ieee80211_mps_frame_release(struct sta_info *sta,
+				 struct ieee802_11_elems *elems)
+{
+	int ac, buffer_local = 0;
+	bool has_buffered = false;
+
+	/* TIM map only for LLID <= IEEE80211_MAX_AID */
+	if (sta->plink_state == NL80211_PLINK_ESTAB)
+		has_buffered = ieee80211_check_tim(elems->tim, elems->tim_len,
+				le16_to_cpu(sta->llid) % IEEE80211_MAX_AID);
+
+	if (has_buffered)
+		mps_dbg(sta->sdata, "%pM indicates buffered frames\n",
+			sta->sta.addr);
+
+	/* only transmit to PS STA with announced, non-zero awake window */
+	if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
+	    (!elems->awake_window || !le16_to_cpu(*elems->awake_window)))
+		return;
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+		buffer_local += skb_queue_len(&sta->ps_tx_buf[ac]) +
+				skb_queue_len(&sta->tx_filtered[ac]);
+
+	if (!has_buffered && !buffer_local)
+		return;
+
+	if (sta->plink_state == NL80211_PLINK_ESTAB)
+		mpsp_trigger_send(sta, has_buffered, !buffer_local);
+	else
+		mps_frame_deliver(sta, 1);
+}
diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c
new file mode 100644
index 0000000..05a256b
--- /dev/null
+++ b/net/mac80211/mesh_sync.c
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2011-2012, Pavel Zubarev <pavel.zubarev@gmail.com>
+ * Copyright 2011-2012, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de>
+ * Copyright 2011-2012, cozybit Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "ieee80211_i.h"
+#include "mesh.h"
+#include "driver-ops.h"
+
+/* This is not in the standard.  It represents a tolerable tbtt drift below
+ * which we do no TSF adjustment.
+ */
+#define TOFFSET_MINIMUM_ADJUSTMENT 10
+
+/* This is not in the standard. It is a margin added to the
+ * Toffset setpoint to mitigate TSF overcorrection
+ * introduced by TSF adjustment latency.
+ */
+#define TOFFSET_SET_MARGIN 20
+
+/* This is not in the standard.  It represents the maximum Toffset jump above
+ * which we'll invalidate the Toffset setpoint and choose a new setpoint.  This
+ * could be, for instance, in case a neighbor is restarted and its TSF counter
+ * reset.
+ */
+#define TOFFSET_MAXIMUM_ADJUSTMENT 30000		/* 30 ms */
+
+struct sync_method {
+	u8 method;
+	struct ieee80211_mesh_sync_ops ops;
+};
+
+/**
+ * mesh_peer_tbtt_adjusting - check if an mp is currently adjusting its TBTT
+ *
+ * @ie: information elements of a management frame from the mesh peer
+ */
+static bool mesh_peer_tbtt_adjusting(struct ieee802_11_elems *ie)
+{
+	return (ie->mesh_config->meshconf_cap &
+			IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING) != 0;
+}
+
+void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	/* sdata->vif.bss_conf.beacon_int in 1024us units, 0.04% */
+	u64 beacon_int_fraction = sdata->vif.bss_conf.beacon_int * 1024 / 2500;
+	u64 tsf;
+	u64 tsfdelta;
+
+	spin_lock_bh(&ifmsh->sync_offset_lock);
+	if (ifmsh->sync_offset_clockdrift_max < beacon_int_fraction) {
+		msync_dbg(sdata, "TBTT : max clockdrift=%lld; adjusting\n",
+			  (long long) ifmsh->sync_offset_clockdrift_max);
+		tsfdelta = -ifmsh->sync_offset_clockdrift_max;
+		ifmsh->sync_offset_clockdrift_max = 0;
+	} else {
+		msync_dbg(sdata, "TBTT : max clockdrift=%lld; adjusting by %llu\n",
+			  (long long) ifmsh->sync_offset_clockdrift_max,
+			  (unsigned long long) beacon_int_fraction);
+		tsfdelta = -beacon_int_fraction;
+		ifmsh->sync_offset_clockdrift_max -= beacon_int_fraction;
+	}
+	spin_unlock_bh(&ifmsh->sync_offset_lock);
+
+	tsf = drv_get_tsf(local, sdata);
+	if (tsf != -1ULL)
+		drv_set_tsf(local, sdata, tsf + tsfdelta);
+}
+
+static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
+				   u16 stype,
+				   struct ieee80211_mgmt *mgmt,
+				   struct ieee802_11_elems *elems,
+				   struct ieee80211_rx_status *rx_status)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	u64 t_t, t_r;
+
+	WARN_ON(ifmsh->mesh_sp_id != IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET);
+
+	/* standard mentions only beacons */
+	if (stype != IEEE80211_STYPE_BEACON)
+		return;
+
+	/* The current tsf is a first approximation for the timestamp
+	 * for the received beacon.  Further down we try to get a
+	 * better value from the rx_status->mactime field if
+	 * available. Also we have to call drv_get_tsf() before
+	 * entering the rcu-read section.*/
+	t_r = drv_get_tsf(local, sdata);
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, mgmt->sa);
+	if (!sta)
+		goto no_sync;
+
+	/* check offset sync conditions (13.13.2.2.1)
+	 *
+	 * TODO also sync to
+	 * dot11MeshNbrOffsetMaxNeighbor non-peer non-MBSS neighbors
+	 */
+
+	if (elems->mesh_config && mesh_peer_tbtt_adjusting(elems)) {
+		clear_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN);
+		msync_dbg(sdata, "STA %pM : is adjusting TBTT\n",
+			  sta->sta.addr);
+		goto no_sync;
+	}
+
+	if (ieee80211_have_rx_timestamp(rx_status))
+		/* time when timestamp field was received */
+		t_r = ieee80211_calculate_rx_timestamp(local, rx_status,
+						       24 + 12 +
+						       elems->total_len +
+						       FCS_LEN,
+						       24);
+
+	/* Timing offset calculation (see 13.13.2.2.2) */
+	t_t = le64_to_cpu(mgmt->u.beacon.timestamp);
+	sta->t_offset = t_t - t_r;
+
+	if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
+		s64 t_clockdrift = sta->t_offset_setpoint - sta->t_offset;
+		msync_dbg(sdata,
+			  "STA %pM : sta->t_offset=%lld, sta->t_offset_setpoint=%lld, t_clockdrift=%lld\n",
+			  sta->sta.addr, (long long) sta->t_offset,
+			  (long long) sta->t_offset_setpoint,
+			  (long long) t_clockdrift);
+
+		if (t_clockdrift > TOFFSET_MAXIMUM_ADJUSTMENT ||
+		    t_clockdrift < -TOFFSET_MAXIMUM_ADJUSTMENT) {
+			msync_dbg(sdata,
+				  "STA %pM : t_clockdrift=%lld too large, setpoint reset\n",
+				  sta->sta.addr,
+				  (long long) t_clockdrift);
+			clear_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN);
+			goto no_sync;
+		}
+
+		spin_lock_bh(&ifmsh->sync_offset_lock);
+		if (t_clockdrift > ifmsh->sync_offset_clockdrift_max)
+			ifmsh->sync_offset_clockdrift_max = t_clockdrift;
+		spin_unlock_bh(&ifmsh->sync_offset_lock);
+	} else {
+		sta->t_offset_setpoint = sta->t_offset - TOFFSET_SET_MARGIN;
+		set_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN);
+		msync_dbg(sdata,
+			  "STA %pM : offset was invalid, sta->t_offset=%lld\n",
+			  sta->sta.addr,
+			  (long long) sta->t_offset);
+	}
+
+no_sync:
+	rcu_read_unlock();
+}
+
+static void mesh_sync_offset_adjust_tbtt(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	WARN_ON(ifmsh->mesh_sp_id != IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET);
+	BUG_ON(!rcu_read_lock_held());
+
+	spin_lock_bh(&ifmsh->sync_offset_lock);
+
+	if (ifmsh->sync_offset_clockdrift_max > TOFFSET_MINIMUM_ADJUSTMENT) {
+		/* Since ajusting the tsf here would
+		 * require a possibly blocking call
+		 * to the driver tsf setter, we punt
+		 * the tsf adjustment to the mesh tasklet
+		 */
+		msync_dbg(sdata,
+			  "TBTT : kicking off TBTT adjustment with clockdrift_max=%lld\n",
+			  ifmsh->sync_offset_clockdrift_max);
+		set_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags);
+
+		ifmsh->adjusting_tbtt = true;
+	} else {
+		msync_dbg(sdata,
+			  "TBTT : max clockdrift=%lld; too small to adjust\n",
+			  (long long)ifmsh->sync_offset_clockdrift_max);
+		ifmsh->sync_offset_clockdrift_max = 0;
+
+		ifmsh->adjusting_tbtt = false;
+	}
+	spin_unlock_bh(&ifmsh->sync_offset_lock);
+}
+
+static const struct sync_method sync_methods[] = {
+	{
+		.method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
+		.ops = {
+			.rx_bcn_presp = &mesh_sync_offset_rx_bcn_presp,
+			.adjust_tbtt = &mesh_sync_offset_adjust_tbtt,
+		}
+	},
+};
+
+const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method)
+{
+	int i;
+
+	for (i = 0 ; i < ARRAY_SIZE(sync_methods); ++i) {
+		if (sync_methods[i].method == method)
+			return &sync_methods[i].ops;
+	}
+	return NULL;
+}
diff --git a/net/mac80211/michael.c b/net/mac80211/michael.c
new file mode 100644
index 0000000..408649b
--- /dev/null
+++ b/net/mac80211/michael.c
@@ -0,0 +1,86 @@
+/*
+ * Michael MIC implementation - optimized for TKIP MIC operations
+ * Copyright 2002-2003, Instant802 Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/ieee80211.h>
+#include <asm/unaligned.h>
+
+#include "michael.h"
+
+static void michael_block(struct michael_mic_ctx *mctx, u32 val)
+{
+	mctx->l ^= val;
+	mctx->r ^= rol32(mctx->l, 17);
+	mctx->l += mctx->r;
+	mctx->r ^= ((mctx->l & 0xff00ff00) >> 8) |
+		   ((mctx->l & 0x00ff00ff) << 8);
+	mctx->l += mctx->r;
+	mctx->r ^= rol32(mctx->l, 3);
+	mctx->l += mctx->r;
+	mctx->r ^= ror32(mctx->l, 2);
+	mctx->l += mctx->r;
+}
+
+static void michael_mic_hdr(struct michael_mic_ctx *mctx, const u8 *key,
+			    struct ieee80211_hdr *hdr)
+{
+	u8 *da, *sa, tid;
+
+	da = ieee80211_get_DA(hdr);
+	sa = ieee80211_get_SA(hdr);
+	if (ieee80211_is_data_qos(hdr->frame_control))
+		tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
+	else
+		tid = 0;
+
+	mctx->l = get_unaligned_le32(key);
+	mctx->r = get_unaligned_le32(key + 4);
+
+	/*
+	 * A pseudo header (DA, SA, Priority, 0, 0, 0) is used in Michael MIC
+	 * calculation, but it is _not_ transmitted
+	 */
+	michael_block(mctx, get_unaligned_le32(da));
+	michael_block(mctx, get_unaligned_le16(&da[4]) |
+			    (get_unaligned_le16(sa) << 16));
+	michael_block(mctx, get_unaligned_le32(&sa[2]));
+	michael_block(mctx, tid);
+}
+
+void michael_mic(const u8 *key, struct ieee80211_hdr *hdr,
+		 const u8 *data, size_t data_len, u8 *mic)
+{
+	u32 val;
+	size_t block, blocks, left;
+	struct michael_mic_ctx mctx;
+
+	michael_mic_hdr(&mctx, key, hdr);
+
+	/* Real data */
+	blocks = data_len / 4;
+	left = data_len % 4;
+
+	for (block = 0; block < blocks; block++)
+		michael_block(&mctx, get_unaligned_le32(&data[block * 4]));
+
+	/* Partial block of 0..3 bytes and padding: 0x5a + 4..7 zeros to make
+	 * total length a multiple of 4. */
+	val = 0x5a;
+	while (left > 0) {
+		val <<= 8;
+		left--;
+		val |= data[blocks * 4 + left];
+	}
+
+	michael_block(&mctx, val);
+	michael_block(&mctx, 0);
+
+	put_unaligned_le32(mctx.l, mic);
+	put_unaligned_le32(mctx.r, mic + 4);
+}
diff --git a/net/mac80211/michael.h b/net/mac80211/michael.h
new file mode 100644
index 0000000..3b848da
--- /dev/null
+++ b/net/mac80211/michael.h
@@ -0,0 +1,24 @@
+/*
+ * Michael MIC implementation - optimized for TKIP MIC operations
+ * Copyright 2002-2003, Instant802 Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef MICHAEL_H
+#define MICHAEL_H
+
+#include <linux/types.h>
+
+#define MICHAEL_MIC_LEN 8
+
+struct michael_mic_ctx {
+	u32 l, r;
+};
+
+void michael_mic(const u8 *key, struct ieee80211_hdr *hdr,
+		 const u8 *data, size_t data_len, u8 *mic);
+
+#endif /* MICHAEL_H */
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
new file mode 100644
index 0000000..5b4328d
--- /dev/null
+++ b/net/mac80211/mlme.c
@@ -0,0 +1,4571 @@
+/*
+ * BSS client mode implementation
+ * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
+ * Copyright 2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/moduleparam.h>
+#include <linux/rtnetlink.h>
+#include <linux/pm_qos.h>
+#include <linux/crc32.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include <asm/unaligned.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "led.h"
+
+#define IEEE80211_AUTH_TIMEOUT		(HZ / 5)
+#define IEEE80211_AUTH_TIMEOUT_LONG	(HZ / 2)
+#define IEEE80211_AUTH_TIMEOUT_SHORT	(HZ / 10)
+#define IEEE80211_AUTH_MAX_TRIES	3
+#define IEEE80211_AUTH_WAIT_ASSOC	(HZ * 5)
+#define IEEE80211_ASSOC_TIMEOUT		(HZ / 5)
+#define IEEE80211_ASSOC_TIMEOUT_LONG	(HZ / 2)
+#define IEEE80211_ASSOC_TIMEOUT_SHORT	(HZ / 10)
+#define IEEE80211_ASSOC_MAX_TRIES	3
+
+static int max_nullfunc_tries = 2;
+module_param(max_nullfunc_tries, int, 0644);
+MODULE_PARM_DESC(max_nullfunc_tries,
+		 "Maximum nullfunc tx tries before disconnecting (reason 4).");
+
+static int max_probe_tries = 5;
+module_param(max_probe_tries, int, 0644);
+MODULE_PARM_DESC(max_probe_tries,
+		 "Maximum probe tries before disconnecting (reason 4).");
+
+/*
+ * Beacon loss timeout is calculated as N frames times the
+ * advertised beacon interval.  This may need to be somewhat
+ * higher than what hardware might detect to account for
+ * delays in the host processing frames. But since we also
+ * probe on beacon miss before declaring the connection lost
+ * default to what we want.
+ */
+static int beacon_loss_count = 7;
+module_param(beacon_loss_count, int, 0644);
+MODULE_PARM_DESC(beacon_loss_count,
+		 "Number of beacon intervals before we decide beacon was lost.");
+
+/*
+ * Time the connection can be idle before we probe
+ * it to see if we can still talk to the AP.
+ */
+#define IEEE80211_CONNECTION_IDLE_TIME	(30 * HZ)
+/*
+ * Time we wait for a probe response after sending
+ * a probe request because of beacon loss or for
+ * checking the connection still works.
+ */
+static int probe_wait_ms = 500;
+module_param(probe_wait_ms, int, 0644);
+MODULE_PARM_DESC(probe_wait_ms,
+		 "Maximum time(ms) to wait for probe response"
+		 " before disconnecting (reason 4).");
+
+/*
+ * Weight given to the latest Beacon frame when calculating average signal
+ * strength for Beacon frames received in the current BSS. This must be
+ * between 1 and 15.
+ */
+#define IEEE80211_SIGNAL_AVE_WEIGHT	3
+
+/*
+ * How many Beacon frames need to have been used in average signal strength
+ * before starting to indicate signal change events.
+ */
+#define IEEE80211_SIGNAL_AVE_MIN_COUNT	4
+
+/*
+ * All cfg80211 functions have to be called outside a locked
+ * section so that they can acquire a lock themselves... This
+ * is much simpler than queuing up things in cfg80211, but we
+ * do need some indirection for that here.
+ */
+enum rx_mgmt_action {
+	/* no action required */
+	RX_MGMT_NONE,
+
+	/* caller must call cfg80211_send_deauth() */
+	RX_MGMT_CFG80211_DEAUTH,
+
+	/* caller must call cfg80211_send_disassoc() */
+	RX_MGMT_CFG80211_DISASSOC,
+
+	/* caller must call cfg80211_send_rx_auth() */
+	RX_MGMT_CFG80211_RX_AUTH,
+
+	/* caller must call cfg80211_send_rx_assoc() */
+	RX_MGMT_CFG80211_RX_ASSOC,
+
+	/* caller must call cfg80211_send_assoc_timeout() */
+	RX_MGMT_CFG80211_ASSOC_TIMEOUT,
+
+	/* used when a processed beacon causes a deauth */
+	RX_MGMT_CFG80211_TX_DEAUTH,
+};
+
+/* utils */
+static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
+{
+	lockdep_assert_held(&ifmgd->mtx);
+}
+
+/*
+ * We can have multiple work items (and connection probing)
+ * scheduling this timer, but we need to take care to only
+ * reschedule it when it should fire _earlier_ than it was
+ * asked for before, or if it's not pending right now. This
+ * function ensures that. Note that it then is required to
+ * run this function for all timeouts after the first one
+ * has happened -- the work that runs from this timer will
+ * do that.
+ */
+static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
+{
+	ASSERT_MGD_MTX(ifmgd);
+
+	if (!timer_pending(&ifmgd->timer) ||
+	    time_before(timeout, ifmgd->timer.expires))
+		mod_timer(&ifmgd->timer, timeout);
+}
+
+void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
+{
+	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
+		return;
+
+	if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
+		return;
+
+	mod_timer(&sdata->u.mgd.bcn_mon_timer,
+		  round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
+}
+
+void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	if (unlikely(!sdata->u.mgd.associated))
+		return;
+
+	if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
+		return;
+
+	mod_timer(&sdata->u.mgd.conn_mon_timer,
+		  round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
+
+	ifmgd->probe_send_count = 0;
+}
+
+static int ecw2cw(int ecw)
+{
+	return (1 << ecw) - 1;
+}
+
+static u32 chandef_downgrade(struct cfg80211_chan_def *c)
+{
+	u32 ret;
+	int tmp;
+
+	switch (c->width) {
+	case NL80211_CHAN_WIDTH_20:
+		c->width = NL80211_CHAN_WIDTH_20_NOHT;
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+		c->width = NL80211_CHAN_WIDTH_20;
+		c->center_freq1 = c->chan->center_freq;
+		ret = IEEE80211_STA_DISABLE_40MHZ |
+		      IEEE80211_STA_DISABLE_VHT;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
+		/* n_P40 */
+		tmp /= 2;
+		/* freq_P40 */
+		c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
+		c->width = NL80211_CHAN_WIDTH_40;
+		ret = IEEE80211_STA_DISABLE_VHT;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+		c->center_freq2 = 0;
+		c->width = NL80211_CHAN_WIDTH_80;
+		ret = IEEE80211_STA_DISABLE_80P80MHZ |
+		      IEEE80211_STA_DISABLE_160MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		/* n_P20 */
+		tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
+		/* n_P80 */
+		tmp /= 4;
+		c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
+		c->width = NL80211_CHAN_WIDTH_80;
+		ret = IEEE80211_STA_DISABLE_80P80MHZ |
+		      IEEE80211_STA_DISABLE_160MHZ;
+		break;
+	default:
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		WARN_ON_ONCE(1);
+		c->width = NL80211_CHAN_WIDTH_20_NOHT;
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		break;
+	}
+
+	WARN_ON_ONCE(!cfg80211_chandef_valid(c));
+
+	return ret;
+}
+
+static u32
+ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_supported_band *sband,
+			     struct ieee80211_channel *channel,
+			     const struct ieee80211_ht_operation *ht_oper,
+			     const struct ieee80211_vht_operation *vht_oper,
+			     struct cfg80211_chan_def *chandef, bool tracking)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct cfg80211_chan_def vht_chandef;
+	u32 ht_cfreq, ret;
+
+	chandef->chan = channel;
+	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
+	chandef->center_freq1 = channel->center_freq;
+	chandef->center_freq2 = 0;
+
+	if (!ht_oper || !sband->ht_cap.ht_supported) {
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	chandef->width = NL80211_CHAN_WIDTH_20;
+
+	ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
+						  channel->band);
+	/* check that channel matches the right operating channel */
+	if (!tracking && channel->center_freq != ht_cfreq) {
+		/*
+		 * It's possible that some APs are confused here;
+		 * Netgear WNDR3700 sometimes reports 4 higher than
+		 * the actual channel in association responses, but
+		 * since we look at probe response/beacon data here
+		 * it should be OK.
+		 */
+		sdata_info(sdata,
+			   "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
+			   channel->center_freq, ht_cfreq,
+			   ht_oper->primary_chan, channel->band);
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	/* check 40 MHz support, if we have it */
+	if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
+		switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
+		case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+			chandef->width = NL80211_CHAN_WIDTH_40;
+			chandef->center_freq1 += 10;
+			break;
+		case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+			chandef->width = NL80211_CHAN_WIDTH_40;
+			chandef->center_freq1 -= 10;
+			break;
+		}
+	} else {
+		/* 40 MHz (and 80 MHz) must be supported for VHT */
+		ret = IEEE80211_STA_DISABLE_VHT;
+		/* also mark 40 MHz disabled */
+		ret |= IEEE80211_STA_DISABLE_40MHZ;
+		goto out;
+	}
+
+	if (!vht_oper || !sband->vht_cap.vht_supported) {
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	vht_chandef.chan = channel;
+	vht_chandef.center_freq1 =
+		ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
+					       channel->band);
+	vht_chandef.center_freq2 = 0;
+
+	switch (vht_oper->chan_width) {
+	case IEEE80211_VHT_CHANWIDTH_USE_HT:
+		vht_chandef.width = chandef->width;
+		break;
+	case IEEE80211_VHT_CHANWIDTH_80MHZ:
+		vht_chandef.width = NL80211_CHAN_WIDTH_80;
+		break;
+	case IEEE80211_VHT_CHANWIDTH_160MHZ:
+		vht_chandef.width = NL80211_CHAN_WIDTH_160;
+		break;
+	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+		vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
+		vht_chandef.center_freq2 =
+			ieee80211_channel_to_frequency(
+				vht_oper->center_freq_seg2_idx,
+				channel->band);
+		break;
+	default:
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+			sdata_info(sdata,
+				   "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
+				   vht_oper->chan_width);
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	if (!cfg80211_chandef_valid(&vht_chandef)) {
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+			sdata_info(sdata,
+				   "AP VHT information is invalid, disable VHT\n");
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
+		ret = 0;
+		goto out;
+	}
+
+	if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+			sdata_info(sdata,
+				   "AP VHT information doesn't match HT, disable VHT\n");
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	*chandef = vht_chandef;
+
+	ret = 0;
+
+out:
+	/* don't print the message below for VHT mismatch if VHT is disabled */
+	if (ret & IEEE80211_STA_DISABLE_VHT)
+		vht_chandef = *chandef;
+
+	/*
+	 * Ignore the DISABLED flag when we're already connected and only
+	 * tracking the APs beacon for bandwidth changes - otherwise we
+	 * might get disconnected here if we connect to an AP, update our
+	 * regulatory information based on the AP's country IE and the
+	 * information we have is wrong/outdated and disables the channel
+	 * that we're actually using for the connection to the AP.
+	 */
+	while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
+					tracking ? 0 :
+						   IEEE80211_CHAN_DISABLED)) {
+		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
+			ret = IEEE80211_STA_DISABLE_HT |
+			      IEEE80211_STA_DISABLE_VHT;
+			break;
+		}
+
+		ret |= chandef_downgrade(chandef);
+	}
+
+	if (chandef->width != vht_chandef.width && !tracking)
+		sdata_info(sdata,
+			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
+
+	WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
+	return ret;
+}
+
+static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
+			       struct sta_info *sta,
+			       const struct ieee80211_ht_operation *ht_oper,
+			       const struct ieee80211_vht_operation *vht_oper,
+			       const u8 *bssid, u32 *changed)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_channel *chan;
+	struct cfg80211_chan_def chandef;
+	u16 ht_opmode;
+	u32 flags;
+	enum ieee80211_sta_rx_bandwidth new_sta_bw;
+	int ret;
+
+	/* if HT was/is disabled, don't track any bandwidth changes */
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
+		return 0;
+
+	/* don't check VHT if we associated as non-VHT station */
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
+		vht_oper = NULL;
+
+	if (WARN_ON_ONCE(!sta))
+		return -EINVAL;
+
+	chan = sdata->vif.bss_conf.chandef.chan;
+	sband = local->hw.wiphy->bands[chan->band];
+
+	/* calculate new channel (type) based on HT/VHT operation IEs */
+	flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
+					     vht_oper, &chandef, true);
+
+	/*
+	 * Downgrade the new channel if we associated with restricted
+	 * capabilities. For example, if we associated as a 20 MHz STA
+	 * to a 40 MHz AP (due to regulatory, capabilities or config
+	 * reasons) then switching to a 40 MHz channel now won't do us
+	 * any good -- we couldn't use it with the AP.
+	 */
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
+	    chandef.width == NL80211_CHAN_WIDTH_80P80)
+		flags |= chandef_downgrade(&chandef);
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
+	    chandef.width == NL80211_CHAN_WIDTH_160)
+		flags |= chandef_downgrade(&chandef);
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
+	    chandef.width > NL80211_CHAN_WIDTH_20)
+		flags |= chandef_downgrade(&chandef);
+
+	if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
+		return 0;
+
+	sdata_info(sdata,
+		   "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
+		   ifmgd->bssid, chandef.chan->center_freq, chandef.width,
+		   chandef.center_freq1, chandef.center_freq2);
+
+	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
+				      IEEE80211_STA_DISABLE_VHT |
+				      IEEE80211_STA_DISABLE_40MHZ |
+				      IEEE80211_STA_DISABLE_80P80MHZ |
+				      IEEE80211_STA_DISABLE_160MHZ)) ||
+	    !cfg80211_chandef_valid(&chandef)) {
+		sdata_info(sdata,
+			   "AP %pM changed bandwidth in a way we can't support - disconnect\n",
+			   ifmgd->bssid);
+		return -EINVAL;
+	}
+
+	switch (chandef.width) {
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_20:
+		new_sta_bw = IEEE80211_STA_RX_BW_20;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+		new_sta_bw = IEEE80211_STA_RX_BW_40;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		new_sta_bw = IEEE80211_STA_RX_BW_80;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_160:
+		new_sta_bw = IEEE80211_STA_RX_BW_160;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (new_sta_bw > sta->cur_max_bandwidth)
+		new_sta_bw = sta->cur_max_bandwidth;
+
+	if (new_sta_bw < sta->sta.bandwidth) {
+		sta->sta.bandwidth = new_sta_bw;
+		rate_control_rate_update(local, sband, sta,
+					 IEEE80211_RC_BW_CHANGED);
+	}
+
+	ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
+	if (ret) {
+		sdata_info(sdata,
+			   "AP %pM changed bandwidth to incompatible one - disconnect\n",
+			   ifmgd->bssid);
+		return ret;
+	}
+
+	if (new_sta_bw > sta->sta.bandwidth) {
+		sta->sta.bandwidth = new_sta_bw;
+		rate_control_rate_update(local, sband, sta,
+					 IEEE80211_RC_BW_CHANGED);
+	}
+
+	ht_opmode = le16_to_cpu(ht_oper->operation_mode);
+
+	/* if bss configuration changed store the new one */
+	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
+		*changed |= BSS_CHANGED_HT;
+		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
+	}
+
+	return 0;
+}
+
+/* frame sending functions */
+
+static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
+				      struct ieee80211_supported_band *sband,
+				      u32 *rates)
+{
+	int i, j, count;
+	*rates = 0;
+	count = 0;
+	for (i = 0; i < supp_rates_len; i++) {
+		int rate = (supp_rates[i] & 0x7F) * 5;
+
+		for (j = 0; j < sband->n_bitrates; j++)
+			if (sband->bitrates[j].bitrate == rate) {
+				*rates |= BIT(j);
+				count++;
+				break;
+			}
+	}
+
+	return count;
+}
+
+static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
+				struct sk_buff *skb, u8 ap_ht_param,
+				struct ieee80211_supported_band *sband,
+				struct ieee80211_channel *channel,
+				enum ieee80211_smps_mode smps)
+{
+	u8 *pos;
+	u32 flags = channel->flags;
+	u16 cap;
+	struct ieee80211_sta_ht_cap ht_cap;
+
+	BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
+
+	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
+	ieee80211_apply_htcap_overrides(sdata, &ht_cap);
+
+	/* determine capability flags */
+	cap = ht_cap.cap;
+
+	switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
+	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+		if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
+			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			cap &= ~IEEE80211_HT_CAP_SGI_40;
+		}
+		break;
+	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+		if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
+			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			cap &= ~IEEE80211_HT_CAP_SGI_40;
+		}
+		break;
+	}
+
+	/*
+	 * If 40 MHz was disabled associate as though we weren't
+	 * capable of 40 MHz -- some broken APs will never fall
+	 * back to trying to transmit in 20 MHz.
+	 */
+	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
+		cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+		cap &= ~IEEE80211_HT_CAP_SGI_40;
+	}
+
+	/* set SM PS mode properly */
+	cap &= ~IEEE80211_HT_CAP_SM_PS;
+	switch (smps) {
+	case IEEE80211_SMPS_AUTOMATIC:
+	case IEEE80211_SMPS_NUM_MODES:
+		WARN_ON(1);
+	case IEEE80211_SMPS_OFF:
+		cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
+			IEEE80211_HT_CAP_SM_PS_SHIFT;
+		break;
+	case IEEE80211_SMPS_STATIC:
+		cap |= WLAN_HT_CAP_SM_PS_STATIC <<
+			IEEE80211_HT_CAP_SM_PS_SHIFT;
+		break;
+	case IEEE80211_SMPS_DYNAMIC:
+		cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
+			IEEE80211_HT_CAP_SM_PS_SHIFT;
+		break;
+	}
+
+	/* reserve and fill IE */
+	pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
+	ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
+}
+
+static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb,
+				 struct ieee80211_supported_band *sband,
+				 struct ieee80211_vht_cap *ap_vht_cap)
+{
+	u8 *pos;
+	u32 cap;
+	struct ieee80211_sta_vht_cap vht_cap;
+
+	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
+
+	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
+	ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
+
+	/* determine capability flags */
+	cap = vht_cap.cap;
+
+	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
+		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
+		cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
+	}
+
+	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
+		cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
+		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
+	}
+
+	/*
+	 * Some APs apparently get confused if our capabilities are better
+	 * than theirs, so restrict what we advertise in the assoc request.
+	 */
+	if (!(ap_vht_cap->vht_cap_info &
+			cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
+		cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
+
+	/* reserve and fill IE */
+	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
+	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
+}
+
+static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	u8 *pos, qos_info;
+	size_t offset = 0, noffset;
+	int i, count, rates_len, supp_rates_len;
+	u16 capab;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *chan;
+	u32 rates = 0;
+
+	lockdep_assert_held(&ifmgd->mtx);
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		return;
+	}
+	chan = chanctx_conf->def.chan;
+	rcu_read_unlock();
+	sband = local->hw.wiphy->bands[chan->band];
+
+	if (assoc_data->supp_rates_len) {
+		/*
+		 * Get all rates supported by the device and the AP as
+		 * some APs don't like getting a superset of their rates
+		 * in the association request (e.g. D-Link DAP 1353 in
+		 * b-only mode)...
+		 */
+		rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
+						       assoc_data->supp_rates_len,
+						       sband, &rates);
+	} else {
+		/*
+		 * In case AP not provide any supported rates information
+		 * before association, we send information element(s) with
+		 * all rates that we support.
+		 */
+		rates = ~0;
+		rates_len = sband->n_bitrates;
+	}
+
+	skb = alloc_skb(local->hw.extra_tx_headroom +
+			sizeof(*mgmt) + /* bit too much but doesn't matter */
+			2 + assoc_data->ssid_len + /* SSID */
+			4 + rates_len + /* (extended) rates */
+			4 + /* power capability */
+			2 + 2 * sband->n_channels + /* supported channels */
+			2 + sizeof(struct ieee80211_ht_cap) + /* HT */
+			2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
+			assoc_data->ie_len + /* extra IEs */
+			9, /* WMM */
+			GFP_KERNEL);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	capab = WLAN_CAPABILITY_ESS;
+
+	if (sband->band == IEEE80211_BAND_2GHZ) {
+		if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
+			capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
+		if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
+			capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
+	}
+
+	if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
+		capab |= WLAN_CAPABILITY_PRIVACY;
+
+	if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
+	    (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
+		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
+
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+	memset(mgmt, 0, 24);
+	memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
+
+	if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
+		skb_put(skb, 10);
+		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+						  IEEE80211_STYPE_REASSOC_REQ);
+		mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
+		mgmt->u.reassoc_req.listen_interval =
+				cpu_to_le16(local->hw.conf.listen_interval);
+		memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
+		       ETH_ALEN);
+	} else {
+		skb_put(skb, 4);
+		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+						  IEEE80211_STYPE_ASSOC_REQ);
+		mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
+		mgmt->u.assoc_req.listen_interval =
+				cpu_to_le16(local->hw.conf.listen_interval);
+	}
+
+	/* SSID */
+	pos = skb_put(skb, 2 + assoc_data->ssid_len);
+	*pos++ = WLAN_EID_SSID;
+	*pos++ = assoc_data->ssid_len;
+	memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
+
+	/* add all rates which were marked to be used above */
+	supp_rates_len = rates_len;
+	if (supp_rates_len > 8)
+		supp_rates_len = 8;
+
+	pos = skb_put(skb, supp_rates_len + 2);
+	*pos++ = WLAN_EID_SUPP_RATES;
+	*pos++ = supp_rates_len;
+
+	count = 0;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if (BIT(i) & rates) {
+			int rate = sband->bitrates[i].bitrate;
+			*pos++ = (u8) (rate / 5);
+			if (++count == 8)
+				break;
+		}
+	}
+
+	if (rates_len > count) {
+		pos = skb_put(skb, rates_len - count + 2);
+		*pos++ = WLAN_EID_EXT_SUPP_RATES;
+		*pos++ = rates_len - count;
+
+		for (i++; i < sband->n_bitrates; i++) {
+			if (BIT(i) & rates) {
+				int rate = sband->bitrates[i].bitrate;
+				*pos++ = (u8) (rate / 5);
+			}
+		}
+	}
+
+	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
+		/* 1. power capabilities */
+		pos = skb_put(skb, 4);
+		*pos++ = WLAN_EID_PWR_CAPABILITY;
+		*pos++ = 2;
+		*pos++ = 0; /* min tx power */
+		*pos++ = chan->max_power; /* max tx power */
+
+		/* 2. supported channels */
+		/* TODO: get this in reg domain format */
+		pos = skb_put(skb, 2 * sband->n_channels + 2);
+		*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
+		*pos++ = 2 * sband->n_channels;
+		for (i = 0; i < sband->n_channels; i++) {
+			*pos++ = ieee80211_frequency_to_channel(
+					sband->channels[i].center_freq);
+			*pos++ = 1; /* one channel in the subband*/
+		}
+	}
+
+	/* if present, add any custom IEs that go before HT */
+	if (assoc_data->ie_len && assoc_data->ie) {
+		static const u8 before_ht[] = {
+			WLAN_EID_SSID,
+			WLAN_EID_SUPP_RATES,
+			WLAN_EID_EXT_SUPP_RATES,
+			WLAN_EID_PWR_CAPABILITY,
+			WLAN_EID_SUPPORTED_CHANNELS,
+			WLAN_EID_RSN,
+			WLAN_EID_QOS_CAPA,
+			WLAN_EID_RRM_ENABLED_CAPABILITIES,
+			WLAN_EID_MOBILITY_DOMAIN,
+			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+		};
+		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
+					     before_ht, ARRAY_SIZE(before_ht),
+					     offset);
+		pos = skb_put(skb, noffset - offset);
+		memcpy(pos, assoc_data->ie + offset, noffset - offset);
+		offset = noffset;
+	}
+
+	if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+			 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
+		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
+				    sband, chan, sdata->smps_mode);
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+		ieee80211_add_vht_ie(sdata, skb, sband,
+				     &assoc_data->ap_vht_cap);
+
+	/* if present, add any custom non-vendor IEs that go after HT */
+	if (assoc_data->ie_len && assoc_data->ie) {
+		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
+						    assoc_data->ie_len,
+						    offset);
+		pos = skb_put(skb, noffset - offset);
+		memcpy(pos, assoc_data->ie + offset, noffset - offset);
+		offset = noffset;
+	}
+
+	if (assoc_data->wmm) {
+		if (assoc_data->uapsd) {
+			qos_info = ifmgd->uapsd_queues;
+			qos_info |= (ifmgd->uapsd_max_sp_len <<
+				     IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
+		} else {
+			qos_info = 0;
+		}
+
+		pos = skb_put(skb, 9);
+		*pos++ = WLAN_EID_VENDOR_SPECIFIC;
+		*pos++ = 7; /* len */
+		*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
+		*pos++ = 0x50;
+		*pos++ = 0xf2;
+		*pos++ = 2; /* WME */
+		*pos++ = 0; /* WME info */
+		*pos++ = 1; /* WME ver */
+		*pos++ = qos_info;
+	}
+
+	/* add any remaining custom (i.e. vendor specific here) IEs */
+	if (assoc_data->ie_len && assoc_data->ie) {
+		noffset = assoc_data->ie_len;
+		pos = skb_put(skb, noffset - offset);
+		memcpy(pos, assoc_data->ie + offset, noffset - offset);
+	}
+
+	drv_mgd_prepare_tx(local, sdata);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
+						IEEE80211_TX_INTFL_MLME_CONN_TX;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+void ieee80211_send_pspoll(struct ieee80211_local *local,
+			   struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_pspoll *pspoll;
+	struct sk_buff *skb;
+
+	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
+	if (!skb)
+		return;
+
+	pspoll = (struct ieee80211_pspoll *) skb->data;
+	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+void ieee80211_send_nullfunc(struct ieee80211_local *local,
+			     struct ieee80211_sub_if_data *sdata,
+			     int powersave)
+{
+	struct sk_buff *skb;
+	struct ieee80211_hdr_3addr *nullfunc;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
+	if (!skb)
+		return;
+
+	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
+	if (powersave)
+		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
+					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
+	if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
+			    IEEE80211_STA_CONNECTION_POLL))
+		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
+
+	ieee80211_tx_skb(sdata, skb);
+}
+
+static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
+					  struct ieee80211_sub_if_data *sdata)
+{
+	struct sk_buff *skb;
+	struct ieee80211_hdr *nullfunc;
+	__le16 fc;
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+		return;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
+	memset(nullfunc, 0, 30);
+	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
+			 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
+	nullfunc->frame_control = fc;
+	memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
+	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
+	memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
+	memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+/* spectrum management related things */
+static void ieee80211_chswitch_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	if (!ieee80211_sdata_running(sdata))
+		return;
+
+	mutex_lock(&ifmgd->mtx);
+	if (!ifmgd->associated)
+		goto out;
+
+	local->_oper_chandef = local->csa_chandef;
+
+	if (!local->ops->channel_switch) {
+		/* call "hw_config" only if doing sw channel switch */
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+	} else {
+		/* update the device channel directly */
+		local->hw.conf.chandef = local->_oper_chandef;
+	}
+
+	/* XXX: shouldn't really modify cfg80211-owned data! */
+	ifmgd->associated->channel = local->_oper_chandef.chan;
+
+	/* XXX: wait for a beacon first? */
+	ieee80211_wake_queues_by_reason(&local->hw,
+					IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_CSA);
+ out:
+	ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
+	mutex_unlock(&ifmgd->mtx);
+}
+
+void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	trace_api_chswitch_done(sdata, success);
+	if (!success) {
+		sdata_info(sdata,
+			   "driver channel switch failed, disconnecting\n");
+		ieee80211_queue_work(&sdata->local->hw,
+				     &ifmgd->csa_connection_drop_work);
+	} else {
+		ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
+	}
+}
+EXPORT_SYMBOL(ieee80211_chswitch_done);
+
+static void ieee80211_chswitch_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
+}
+
+static void
+ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
+				 u64 timestamp, struct ieee802_11_elems *elems,
+				 bool beacon)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct cfg80211_bss *cbss = ifmgd->associated;
+	struct ieee80211_bss *bss;
+	struct ieee80211_chanctx *chanctx;
+	enum ieee80211_band new_band;
+	int new_freq;
+	u8 new_chan_no;
+	u8 count;
+	u8 mode;
+	struct ieee80211_channel *new_chan;
+	struct cfg80211_chan_def new_chandef = {};
+	struct cfg80211_chan_def new_vht_chandef = {};
+	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
+	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
+	const struct ieee80211_ht_operation *ht_oper;
+	int secondary_channel_offset = -1;
+
+	ASSERT_MGD_MTX(ifmgd);
+
+	if (!cbss)
+		return;
+
+	if (local->scanning)
+		return;
+
+	/* disregard subsequent announcements if we are already processing */
+	if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
+		return;
+
+	sec_chan_offs = elems->sec_chan_offs;
+	wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
+	ht_oper = elems->ht_operation;
+
+	if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
+			    IEEE80211_STA_DISABLE_40MHZ)) {
+		sec_chan_offs = NULL;
+		wide_bw_chansw_ie = NULL;
+		/* only used for bandwidth here */
+		ht_oper = NULL;
+	}
+
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
+		wide_bw_chansw_ie = NULL;
+
+	if (elems->ext_chansw_ie) {
+		if (!ieee80211_operating_class_to_band(
+				elems->ext_chansw_ie->new_operating_class,
+				&new_band)) {
+			sdata_info(sdata,
+				   "cannot understand ECSA IE operating class %d, disconnecting\n",
+				   elems->ext_chansw_ie->new_operating_class);
+			ieee80211_queue_work(&local->hw,
+					     &ifmgd->csa_connection_drop_work);
+		}
+		new_chan_no = elems->ext_chansw_ie->new_ch_num;
+		count = elems->ext_chansw_ie->count;
+		mode = elems->ext_chansw_ie->mode;
+	} else if (elems->ch_switch_ie) {
+		new_band = cbss->channel->band;
+		new_chan_no = elems->ch_switch_ie->new_ch_num;
+		count = elems->ch_switch_ie->count;
+		mode = elems->ch_switch_ie->mode;
+	} else {
+		/* nothing here we understand */
+		return;
+	}
+
+	bss = (void *)cbss->priv;
+
+	new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
+	new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
+	if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
+		sdata_info(sdata,
+			   "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
+			   ifmgd->associated->bssid, new_freq);
+		ieee80211_queue_work(&local->hw,
+				     &ifmgd->csa_connection_drop_work);
+		return;
+	}
+
+	if (!beacon && sec_chan_offs) {
+		secondary_channel_offset = sec_chan_offs->sec_chan_offs;
+	} else if (beacon && ht_oper) {
+		secondary_channel_offset =
+			ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
+	} else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
+		/*
+		 * If it's not a beacon, HT is enabled and the IE not present,
+		 * it's 20 MHz, 802.11-2012 8.5.2.6:
+		 *	This element [the Secondary Channel Offset Element] is
+		 *	present when switching to a 40 MHz channel. It may be
+		 *	present when switching to a 20 MHz channel (in which
+		 *	case the secondary channel offset is set to SCN).
+		 */
+		secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
+	}
+
+	switch (secondary_channel_offset) {
+	default:
+		/* secondary_channel_offset was present but is invalid */
+	case IEEE80211_HT_PARAM_CHA_SEC_NONE:
+		cfg80211_chandef_create(&new_chandef, new_chan,
+					NL80211_CHAN_HT20);
+		break;
+	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+		cfg80211_chandef_create(&new_chandef, new_chan,
+					NL80211_CHAN_HT40PLUS);
+		break;
+	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+		cfg80211_chandef_create(&new_chandef, new_chan,
+					NL80211_CHAN_HT40MINUS);
+		break;
+	case -1:
+		cfg80211_chandef_create(&new_chandef, new_chan,
+					NL80211_CHAN_NO_HT);
+		break;
+	}
+
+	if (wide_bw_chansw_ie) {
+		new_vht_chandef.chan = new_chan;
+		new_vht_chandef.center_freq1 =
+			ieee80211_channel_to_frequency(
+				wide_bw_chansw_ie->new_center_freq_seg0,
+				new_band);
+
+		switch (wide_bw_chansw_ie->new_channel_width) {
+		default:
+			/* hmmm, ignore VHT and use HT if present */
+		case IEEE80211_VHT_CHANWIDTH_USE_HT:
+			new_vht_chandef.chan = NULL;
+			break;
+		case IEEE80211_VHT_CHANWIDTH_80MHZ:
+			new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
+			break;
+		case IEEE80211_VHT_CHANWIDTH_160MHZ:
+			new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
+			break;
+		case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+			/* field is otherwise reserved */
+			new_vht_chandef.center_freq2 =
+				ieee80211_channel_to_frequency(
+					wide_bw_chansw_ie->new_center_freq_seg1,
+					new_band);
+			new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
+			break;
+		}
+		if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
+		    new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
+			chandef_downgrade(&new_vht_chandef);
+		if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
+		    new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
+			chandef_downgrade(&new_vht_chandef);
+		if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
+		    new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
+			chandef_downgrade(&new_vht_chandef);
+	}
+
+	/* if VHT data is there validate & use it */
+	if (new_vht_chandef.chan) {
+		if (!cfg80211_chandef_compatible(&new_vht_chandef,
+						 &new_chandef)) {
+			sdata_info(sdata,
+				   "AP %pM CSA has inconsistent channel data, disconnecting\n",
+				   ifmgd->associated->bssid);
+			ieee80211_queue_work(&local->hw,
+					     &ifmgd->csa_connection_drop_work);
+			return;
+		}
+		new_chandef = new_vht_chandef;
+	}
+
+	if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
+				     IEEE80211_CHAN_DISABLED)) {
+		sdata_info(sdata,
+			   "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
+			   ifmgd->associated->bssid, new_freq,
+			   new_chandef.width, new_chandef.center_freq1,
+			   new_chandef.center_freq2);
+		ieee80211_queue_work(&local->hw,
+				     &ifmgd->csa_connection_drop_work);
+		return;
+	}
+
+	ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
+
+	if (local->use_chanctx) {
+		sdata_info(sdata,
+			   "not handling channel switch with channel contexts\n");
+		ieee80211_queue_work(&local->hw,
+				     &ifmgd->csa_connection_drop_work);
+		return;
+	}
+
+	mutex_lock(&local->chanctx_mtx);
+	if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
+		mutex_unlock(&local->chanctx_mtx);
+		return;
+	}
+	chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
+			       struct ieee80211_chanctx, conf);
+	if (chanctx->refcount > 1) {
+		sdata_info(sdata,
+			   "channel switch with multiple interfaces on the same channel, disconnecting\n");
+		ieee80211_queue_work(&local->hw,
+				     &ifmgd->csa_connection_drop_work);
+		mutex_unlock(&local->chanctx_mtx);
+		return;
+	}
+	mutex_unlock(&local->chanctx_mtx);
+
+	local->csa_chandef = new_chandef;
+
+	if (mode)
+		ieee80211_stop_queues_by_reason(&local->hw,
+				IEEE80211_MAX_QUEUE_MAP,
+				IEEE80211_QUEUE_STOP_REASON_CSA);
+
+	if (local->ops->channel_switch) {
+		/* use driver's channel switch callback */
+		struct ieee80211_channel_switch ch_switch = {
+			.timestamp = timestamp,
+			.block_tx = mode,
+			.chandef = new_chandef,
+			.count = count,
+		};
+
+		drv_channel_switch(local, &ch_switch);
+		return;
+	}
+
+	/* channel switch handled in software */
+	if (count <= 1)
+		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
+	else
+		mod_timer(&ifmgd->chswitch_timer,
+			  TU_TO_EXP_TIME(count * cbss->beacon_interval));
+}
+
+static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_channel *channel,
+				       const u8 *country_ie, u8 country_ie_len,
+				       const u8 *pwr_constr_elem)
+{
+	struct ieee80211_country_ie_triplet *triplet;
+	int chan = ieee80211_frequency_to_channel(channel->center_freq);
+	int i, chan_pwr, chan_increment, new_ap_level;
+	bool have_chan_pwr = false;
+
+	/* Invalid IE */
+	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
+		return 0;
+
+	triplet = (void *)(country_ie + 3);
+	country_ie_len -= 3;
+
+	switch (channel->band) {
+	default:
+		WARN_ON_ONCE(1);
+		/* fall through */
+	case IEEE80211_BAND_2GHZ:
+	case IEEE80211_BAND_60GHZ:
+		chan_increment = 1;
+		break;
+	case IEEE80211_BAND_5GHZ:
+		chan_increment = 4;
+		break;
+	}
+
+	/* find channel */
+	while (country_ie_len >= 3) {
+		u8 first_channel = triplet->chans.first_channel;
+
+		if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
+			goto next;
+
+		for (i = 0; i < triplet->chans.num_channels; i++) {
+			if (first_channel + i * chan_increment == chan) {
+				have_chan_pwr = true;
+				chan_pwr = triplet->chans.max_power;
+				break;
+			}
+		}
+		if (have_chan_pwr)
+			break;
+
+ next:
+		triplet++;
+		country_ie_len -= 3;
+	}
+
+	if (!have_chan_pwr)
+		return 0;
+
+	new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
+
+	if (sdata->ap_power_level == new_ap_level)
+		return 0;
+
+	sdata_info(sdata,
+		   "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
+		   new_ap_level, chan_pwr, *pwr_constr_elem,
+		   sdata->u.mgd.bssid);
+	sdata->ap_power_level = new_ap_level;
+	if (__ieee80211_recalc_txpower(sdata))
+		return BSS_CHANGED_TXPOWER;
+	return 0;
+}
+
+/* powersave */
+static void ieee80211_enable_ps(struct ieee80211_local *local,
+				struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_conf *conf = &local->hw.conf;
+
+	/*
+	 * If we are scanning right now then the parameters will
+	 * take effect when scan finishes.
+	 */
+	if (local->scanning)
+		return;
+
+	if (conf->dynamic_ps_timeout > 0 &&
+	    !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
+		mod_timer(&local->dynamic_ps_timer, jiffies +
+			  msecs_to_jiffies(conf->dynamic_ps_timeout));
+	} else {
+		if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
+			ieee80211_send_nullfunc(local, sdata, 1);
+
+		if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
+		    (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
+			return;
+
+		conf->flags |= IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+}
+
+static void ieee80211_change_ps(struct ieee80211_local *local)
+{
+	struct ieee80211_conf *conf = &local->hw.conf;
+
+	if (local->ps_sdata) {
+		ieee80211_enable_ps(local, local->ps_sdata);
+	} else if (conf->flags & IEEE80211_CONF_PS) {
+		conf->flags &= ~IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+		del_timer_sync(&local->dynamic_ps_timer);
+		cancel_work_sync(&local->dynamic_ps_enable_work);
+	}
+}
+
+static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *mgd = &sdata->u.mgd;
+	struct sta_info *sta = NULL;
+	bool authorized = false;
+
+	if (!mgd->powersave)
+		return false;
+
+	if (mgd->broken_ap)
+		return false;
+
+	if (!mgd->associated)
+		return false;
+
+	if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
+			  IEEE80211_STA_CONNECTION_POLL))
+		return false;
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, mgd->bssid);
+	if (sta)
+		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
+	rcu_read_unlock();
+
+	return authorized;
+}
+
+/* need to hold RTNL or interface lock */
+void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
+{
+	struct ieee80211_sub_if_data *sdata, *found = NULL;
+	int count = 0;
+	int timeout;
+
+	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
+		local->ps_sdata = NULL;
+		return;
+	}
+
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+		if (sdata->vif.type == NL80211_IFTYPE_AP) {
+			/* If an AP vif is found, then disable PS
+			 * by setting the count to zero thereby setting
+			 * ps_sdata to NULL.
+			 */
+			count = 0;
+			break;
+		}
+		if (sdata->vif.type != NL80211_IFTYPE_STATION)
+			continue;
+		found = sdata;
+		count++;
+	}
+
+	if (count == 1 && ieee80211_powersave_allowed(found)) {
+		s32 beaconint_us;
+
+		if (latency < 0)
+			latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
+
+		beaconint_us = ieee80211_tu_to_usec(
+					found->vif.bss_conf.beacon_int);
+
+		timeout = local->dynamic_ps_forced_timeout;
+		if (timeout < 0) {
+			/*
+			 * Go to full PSM if the user configures a very low
+			 * latency requirement.
+			 * The 2000 second value is there for compatibility
+			 * until the PM_QOS_NETWORK_LATENCY is configured
+			 * with real values.
+			 */
+			if (latency > (1900 * USEC_PER_MSEC) &&
+			    latency != (2000 * USEC_PER_SEC))
+				timeout = 0;
+			else
+				timeout = 100;
+		}
+		local->hw.conf.dynamic_ps_timeout = timeout;
+
+		if (beaconint_us > latency) {
+			local->ps_sdata = NULL;
+		} else {
+			int maxslp = 1;
+			u8 dtimper = found->u.mgd.dtim_period;
+
+			/* If the TIM IE is invalid, pretend the value is 1 */
+			if (!dtimper)
+				dtimper = 1;
+			else if (dtimper > 1)
+				maxslp = min_t(int, dtimper,
+						    latency / beaconint_us);
+
+			local->hw.conf.max_sleep_period = maxslp;
+			local->hw.conf.ps_dtim_period = dtimper;
+			local->ps_sdata = found;
+		}
+	} else {
+		local->ps_sdata = NULL;
+	}
+
+	ieee80211_change_ps(local);
+}
+
+void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
+{
+	bool ps_allowed = ieee80211_powersave_allowed(sdata);
+
+	if (sdata->vif.bss_conf.ps != ps_allowed) {
+		sdata->vif.bss_conf.ps = ps_allowed;
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
+	}
+}
+
+void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local,
+			     dynamic_ps_disable_work);
+
+	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+
+	ieee80211_wake_queues_by_reason(&local->hw,
+					IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_PS);
+}
+
+void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local,
+			     dynamic_ps_enable_work);
+	struct ieee80211_sub_if_data *sdata = local->ps_sdata;
+	struct ieee80211_if_managed *ifmgd;
+	unsigned long flags;
+	int q;
+
+	/* can only happen when PS was just disabled anyway */
+	if (!sdata)
+		return;
+
+	ifmgd = &sdata->u.mgd;
+
+	if (local->hw.conf.flags & IEEE80211_CONF_PS)
+		return;
+
+	if (local->hw.conf.dynamic_ps_timeout > 0) {
+		/* don't enter PS if TX frames are pending */
+		if (drv_tx_frames_pending(local)) {
+			mod_timer(&local->dynamic_ps_timer, jiffies +
+				  msecs_to_jiffies(
+				  local->hw.conf.dynamic_ps_timeout));
+			return;
+		}
+
+		/*
+		 * transmission can be stopped by others which leads to
+		 * dynamic_ps_timer expiry. Postpone the ps timer if it
+		 * is not the actual idle state.
+		 */
+		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+		for (q = 0; q < local->hw.queues; q++) {
+			if (local->queue_stop_reasons[q]) {
+				spin_unlock_irqrestore(&local->queue_stop_reason_lock,
+						       flags);
+				mod_timer(&local->dynamic_ps_timer, jiffies +
+					  msecs_to_jiffies(
+					  local->hw.conf.dynamic_ps_timeout));
+				return;
+			}
+		}
+		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+	}
+
+	if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
+	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
+		if (drv_tx_frames_pending(local)) {
+			mod_timer(&local->dynamic_ps_timer, jiffies +
+				  msecs_to_jiffies(
+				  local->hw.conf.dynamic_ps_timeout));
+		} else {
+			ieee80211_send_nullfunc(local, sdata, 1);
+			/* Flush to get the tx status of nullfunc frame */
+			ieee80211_flush_queues(local, sdata);
+		}
+	}
+
+	if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
+	      (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
+	    (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
+		ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
+		local->hw.conf.flags |= IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+}
+
+void ieee80211_dynamic_ps_timer(unsigned long data)
+{
+	struct ieee80211_local *local = (void *) data;
+
+	if (local->quiescing || local->suspended)
+		return;
+
+	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
+}
+
+void ieee80211_dfs_cac_timer_work(struct work_struct *work)
+{
+	struct delayed_work *delayed_work =
+		container_of(work, struct delayed_work, work);
+	struct ieee80211_sub_if_data *sdata =
+		container_of(delayed_work, struct ieee80211_sub_if_data,
+			     dfs_cac_timer_work);
+
+	ieee80211_vif_release_channel(sdata);
+
+	cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
+}
+
+/* MLME */
+static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata,
+				     const u8 *wmm_param, size_t wmm_param_len)
+{
+	struct ieee80211_tx_queue_params params;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	size_t left;
+	int count;
+	const u8 *pos;
+	u8 uapsd_queues = 0;
+
+	if (!local->ops->conf_tx)
+		return false;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return false;
+
+	if (!wmm_param)
+		return false;
+
+	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
+		return false;
+
+	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
+		uapsd_queues = ifmgd->uapsd_queues;
+
+	count = wmm_param[6] & 0x0f;
+	if (count == ifmgd->wmm_last_param_set)
+		return false;
+	ifmgd->wmm_last_param_set = count;
+
+	pos = wmm_param + 8;
+	left = wmm_param_len - 8;
+
+	memset(&params, 0, sizeof(params));
+
+	sdata->wmm_acm = 0;
+	for (; left >= 4; left -= 4, pos += 4) {
+		int aci = (pos[0] >> 5) & 0x03;
+		int acm = (pos[0] >> 4) & 0x01;
+		bool uapsd = false;
+		int queue;
+
+		switch (aci) {
+		case 1: /* AC_BK */
+			queue = 3;
+			if (acm)
+				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
+				uapsd = true;
+			break;
+		case 2: /* AC_VI */
+			queue = 1;
+			if (acm)
+				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
+				uapsd = true;
+			break;
+		case 3: /* AC_VO */
+			queue = 0;
+			if (acm)
+				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
+				uapsd = true;
+			break;
+		case 0: /* AC_BE */
+		default:
+			queue = 2;
+			if (acm)
+				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
+				uapsd = true;
+			break;
+		}
+
+		params.aifs = pos[0] & 0x0f;
+		params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
+		params.cw_min = ecw2cw(pos[1] & 0x0f);
+		params.txop = get_unaligned_le16(pos + 2);
+		params.acm = acm;
+		params.uapsd = uapsd;
+
+		mlme_dbg(sdata,
+			 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
+			 queue, aci, acm,
+			 params.aifs, params.cw_min, params.cw_max,
+			 params.txop, params.uapsd);
+		sdata->tx_conf[queue] = params;
+		if (drv_conf_tx(local, sdata, queue, &params))
+			sdata_err(sdata,
+				  "failed to set TX queue parameters for queue %d\n",
+				  queue);
+	}
+
+	/* enable WMM or activate new settings */
+	sdata->vif.bss_conf.qos = true;
+	return true;
+}
+
+static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
+{
+	lockdep_assert_held(&sdata->local->mtx);
+
+	sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
+				IEEE80211_STA_BEACON_POLL);
+	ieee80211_run_deferred_scan(sdata->local);
+}
+
+static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
+{
+	mutex_lock(&sdata->local->mtx);
+	__ieee80211_stop_poll(sdata);
+	mutex_unlock(&sdata->local->mtx);
+}
+
+static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
+					   u16 capab, bool erp_valid, u8 erp)
+{
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+	u32 changed = 0;
+	bool use_protection;
+	bool use_short_preamble;
+	bool use_short_slot;
+
+	if (erp_valid) {
+		use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
+		use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
+	} else {
+		use_protection = false;
+		use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
+	}
+
+	use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
+	if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
+		use_short_slot = true;
+
+	if (use_protection != bss_conf->use_cts_prot) {
+		bss_conf->use_cts_prot = use_protection;
+		changed |= BSS_CHANGED_ERP_CTS_PROT;
+	}
+
+	if (use_short_preamble != bss_conf->use_short_preamble) {
+		bss_conf->use_short_preamble = use_short_preamble;
+		changed |= BSS_CHANGED_ERP_PREAMBLE;
+	}
+
+	if (use_short_slot != bss_conf->use_short_slot) {
+		bss_conf->use_short_slot = use_short_slot;
+		changed |= BSS_CHANGED_ERP_SLOT;
+	}
+
+	return changed;
+}
+
+static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
+				     struct cfg80211_bss *cbss,
+				     u32 bss_info_changed)
+{
+	struct ieee80211_bss *bss = (void *)cbss->priv;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+
+	bss_info_changed |= BSS_CHANGED_ASSOC;
+	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
+		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
+
+	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
+		beacon_loss_count * bss_conf->beacon_int));
+
+	sdata->u.mgd.associated = cbss;
+	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
+
+	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
+
+	if (sdata->vif.p2p) {
+		const struct cfg80211_bss_ies *ies;
+
+		rcu_read_lock();
+		ies = rcu_dereference(cbss->ies);
+		if (ies) {
+			int ret;
+
+			ret = cfg80211_get_p2p_attr(
+					ies->data, ies->len,
+					IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
+					(u8 *) &bss_conf->p2p_noa_attr,
+					sizeof(bss_conf->p2p_noa_attr));
+			if (ret >= 2) {
+				sdata->u.mgd.p2p_noa_index =
+					bss_conf->p2p_noa_attr.index;
+				bss_info_changed |= BSS_CHANGED_P2P_PS;
+			}
+		}
+		rcu_read_unlock();
+	}
+
+	/* just to be sure */
+	ieee80211_stop_poll(sdata);
+
+	ieee80211_led_assoc(local, 1);
+
+	if (sdata->u.mgd.assoc_data->have_beacon) {
+		/*
+		 * If the AP is buggy we may get here with no DTIM period
+		 * known, so assume it's 1 which is the only safe assumption
+		 * in that case, although if the TIM IE is broken powersave
+		 * probably just won't work at all.
+		 */
+		bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
+		bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
+	} else {
+		bss_conf->dtim_period = 0;
+	}
+
+	bss_conf->assoc = 1;
+
+	/* Tell the driver to monitor connection quality (if supported) */
+	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
+	    bss_conf->cqm_rssi_thold)
+		bss_info_changed |= BSS_CHANGED_CQM;
+
+	/* Enable ARP filtering */
+	if (bss_conf->arp_addr_cnt)
+		bss_info_changed |= BSS_CHANGED_ARP_FILTER;
+
+	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
+
+	mutex_lock(&local->iflist_mtx);
+	ieee80211_recalc_ps(local, -1);
+	mutex_unlock(&local->iflist_mtx);
+
+	ieee80211_recalc_smps(sdata);
+	ieee80211_recalc_ps_vif(sdata);
+
+	netif_carrier_on(sdata->dev);
+}
+
+static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
+				   u16 stype, u16 reason, bool tx,
+				   u8 *frame_buf)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+	u32 changed = 0;
+
+	ASSERT_MGD_MTX(ifmgd);
+
+	if (WARN_ON_ONCE(tx && !frame_buf))
+		return;
+
+	if (WARN_ON(!ifmgd->associated))
+		return;
+
+	ieee80211_stop_poll(sdata);
+
+	ifmgd->associated = NULL;
+	netif_carrier_off(sdata->dev);
+
+	/*
+	 * if we want to get out of ps before disassoc (why?) we have
+	 * to do it before sending disassoc, as otherwise the null-packet
+	 * won't be valid.
+	 */
+	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+	local->ps_sdata = NULL;
+
+	/* disable per-vif ps */
+	ieee80211_recalc_ps_vif(sdata);
+
+	/* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
+	if (tx)
+		ieee80211_flush_queues(local, sdata);
+
+	/* deauthenticate/disassociate now */
+	if (tx || frame_buf)
+		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
+					       reason, tx, frame_buf);
+
+	/* flush out frame */
+	if (tx)
+		ieee80211_flush_queues(local, sdata);
+
+	/* clear bssid only after building the needed mgmt frames */
+	memset(ifmgd->bssid, 0, ETH_ALEN);
+
+	/* remove AP and TDLS peers */
+	sta_info_flush_defer(sdata);
+
+	/* finally reset all BSS / config parameters */
+	changed |= ieee80211_reset_erp_info(sdata);
+
+	ieee80211_led_assoc(local, 0);
+	changed |= BSS_CHANGED_ASSOC;
+	sdata->vif.bss_conf.assoc = false;
+
+	ifmgd->p2p_noa_index = -1;
+	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
+	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
+
+	/* on the next assoc, re-program HT/VHT parameters */
+	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
+	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
+	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
+	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
+
+	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
+
+	del_timer_sync(&local->dynamic_ps_timer);
+	cancel_work_sync(&local->dynamic_ps_enable_work);
+
+	/* Disable ARP filtering */
+	if (sdata->vif.bss_conf.arp_addr_cnt)
+		changed |= BSS_CHANGED_ARP_FILTER;
+
+	sdata->vif.bss_conf.qos = false;
+	changed |= BSS_CHANGED_QOS;
+
+	/* The BSSID (not really interesting) and HT changed */
+	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	/* disassociated - set to defaults now */
+	ieee80211_set_wmm_default(sdata, false);
+
+	del_timer_sync(&sdata->u.mgd.conn_mon_timer);
+	del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
+	del_timer_sync(&sdata->u.mgd.timer);
+	del_timer_sync(&sdata->u.mgd.chswitch_timer);
+
+	sdata->vif.bss_conf.dtim_period = 0;
+
+	ifmgd->flags = 0;
+	ieee80211_vif_release_channel(sdata);
+}
+
+void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_hdr *hdr)
+{
+	/*
+	 * We can postpone the mgd.timer whenever receiving unicast frames
+	 * from AP because we know that the connection is working both ways
+	 * at that time. But multicast frames (and hence also beacons) must
+	 * be ignored here, because we need to trigger the timer during
+	 * data idle periods for sending the periodic probe request to the
+	 * AP we're connected to.
+	 */
+	if (is_multicast_ether_addr(hdr->addr1))
+		return;
+
+	ieee80211_sta_reset_conn_monitor(sdata);
+}
+
+static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+
+	mutex_lock(&local->mtx);
+	if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
+			      IEEE80211_STA_CONNECTION_POLL))) {
+		mutex_unlock(&local->mtx);
+		return;
+	}
+
+	__ieee80211_stop_poll(sdata);
+
+	mutex_lock(&local->iflist_mtx);
+	ieee80211_recalc_ps(local, -1);
+	mutex_unlock(&local->iflist_mtx);
+
+	if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
+		goto out;
+
+	/*
+	 * We've received a probe response, but are not sure whether
+	 * we have or will be receiving any beacons or data, so let's
+	 * schedule the timers again, just in case.
+	 */
+	ieee80211_sta_reset_beacon_monitor(sdata);
+
+	mod_timer(&ifmgd->conn_mon_timer,
+		  round_jiffies_up(jiffies +
+				   IEEE80211_CONNECTION_IDLE_TIME));
+out:
+	mutex_unlock(&local->mtx);
+}
+
+void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_hdr *hdr, bool ack)
+{
+	if (!ieee80211_is_data(hdr->frame_control))
+	    return;
+
+	if (ieee80211_is_nullfunc(hdr->frame_control) &&
+	    sdata->u.mgd.probe_send_count > 0) {
+		if (ack)
+			ieee80211_sta_reset_conn_monitor(sdata);
+		else
+			sdata->u.mgd.nullfunc_failed = true;
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+		return;
+	}
+
+	if (ack)
+		ieee80211_sta_reset_conn_monitor(sdata);
+}
+
+static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const u8 *ssid;
+	u8 *dst = ifmgd->associated->bssid;
+	u8 unicast_limit = max(1, max_probe_tries - 3);
+
+	/*
+	 * Try sending broadcast probe requests for the last three
+	 * probe requests after the first ones failed since some
+	 * buggy APs only support broadcast probe requests.
+	 */
+	if (ifmgd->probe_send_count >= unicast_limit)
+		dst = NULL;
+
+	/*
+	 * When the hardware reports an accurate Tx ACK status, it's
+	 * better to send a nullfunc frame instead of a probe request,
+	 * as it will kick us off the AP quickly if we aren't associated
+	 * anymore. The timeout will be reset if the frame is ACKed by
+	 * the AP.
+	 */
+	ifmgd->probe_send_count++;
+
+	if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
+		ifmgd->nullfunc_failed = false;
+		ieee80211_send_nullfunc(sdata->local, sdata, 0);
+	} else {
+		int ssid_len;
+
+		rcu_read_lock();
+		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
+		if (WARN_ON_ONCE(ssid == NULL))
+			ssid_len = 0;
+		else
+			ssid_len = ssid[1];
+
+		ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
+					 0, (u32) -1, true, 0,
+					 ifmgd->associated->channel, false);
+		rcu_read_unlock();
+	}
+
+	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
+	run_again(ifmgd, ifmgd->probe_timeout);
+	if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		ieee80211_flush_queues(sdata->local, sdata);
+}
+
+static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
+				   bool beacon)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	bool already = false;
+
+	if (!ieee80211_sdata_running(sdata))
+		return;
+
+	mutex_lock(&ifmgd->mtx);
+
+	if (!ifmgd->associated)
+		goto out;
+
+	mutex_lock(&sdata->local->mtx);
+
+	if (sdata->local->tmp_channel || sdata->local->scanning) {
+		mutex_unlock(&sdata->local->mtx);
+		goto out;
+	}
+
+	if (beacon) {
+		mlme_dbg_ratelimited(sdata,
+				     "detected beacon loss from AP (missed %d beacons) - probing\n",
+				     beacon_loss_count);
+
+		ieee80211_cqm_rssi_notify(&sdata->vif,
+					  NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
+					  GFP_KERNEL);
+	}
+
+	/*
+	 * The driver/our work has already reported this event or the
+	 * connection monitoring has kicked in and we have already sent
+	 * a probe request. Or maybe the AP died and the driver keeps
+	 * reporting until we disassociate...
+	 *
+	 * In either case we have to ignore the current call to this
+	 * function (except for setting the correct probe reason bit)
+	 * because otherwise we would reset the timer every time and
+	 * never check whether we received a probe response!
+	 */
+	if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
+			    IEEE80211_STA_CONNECTION_POLL))
+		already = true;
+
+	if (beacon)
+		ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
+	else
+		ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
+
+	mutex_unlock(&sdata->local->mtx);
+
+	if (already)
+		goto out;
+
+	mutex_lock(&sdata->local->iflist_mtx);
+	ieee80211_recalc_ps(sdata->local, -1);
+	mutex_unlock(&sdata->local->iflist_mtx);
+
+	ifmgd->probe_send_count = 0;
+	ieee80211_mgd_probe_ap_send(sdata);
+ out:
+	mutex_unlock(&ifmgd->mtx);
+}
+
+struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
+					  struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct cfg80211_bss *cbss;
+	struct sk_buff *skb;
+	const u8 *ssid;
+	int ssid_len;
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+		return NULL;
+
+	ASSERT_MGD_MTX(ifmgd);
+
+	if (ifmgd->associated)
+		cbss = ifmgd->associated;
+	else if (ifmgd->auth_data)
+		cbss = ifmgd->auth_data->bss;
+	else if (ifmgd->assoc_data)
+		cbss = ifmgd->assoc_data->bss;
+	else
+		return NULL;
+
+	rcu_read_lock();
+	ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
+	if (WARN_ON_ONCE(ssid == NULL))
+		ssid_len = 0;
+	else
+		ssid_len = ssid[1];
+
+	skb = ieee80211_build_probe_req(sdata, cbss->bssid,
+					(u32) -1, cbss->channel,
+					ssid + 2, ssid_len,
+					NULL, 0, true);
+	rcu_read_unlock();
+
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_ap_probereq_get);
+
+static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	mutex_lock(&ifmgd->mtx);
+	if (!ifmgd->associated) {
+		mutex_unlock(&ifmgd->mtx);
+		return;
+	}
+
+	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+			       WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
+			       true, frame_buf);
+	ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
+	ieee80211_wake_queues_by_reason(&sdata->local->hw,
+					IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_CSA);
+	mutex_unlock(&ifmgd->mtx);
+
+	/*
+	 * must be outside lock due to cfg80211,
+	 * but that's not a problem.
+	 */
+	cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
+}
+
+static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.beacon_connection_loss_work);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct sta_info *sta;
+
+	if (ifmgd->associated) {
+		rcu_read_lock();
+		sta = sta_info_get(sdata, ifmgd->bssid);
+		if (sta)
+			sta->beacon_loss_count++;
+		rcu_read_unlock();
+	}
+
+	if (ifmgd->connection_loss) {
+		sdata_info(sdata, "Connection to AP %pM lost\n",
+			   ifmgd->bssid);
+		__ieee80211_disconnect(sdata);
+	} else {
+		ieee80211_mgd_probe_ap(sdata, true);
+	}
+}
+
+static void ieee80211_csa_connection_drop_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.csa_connection_drop_work);
+
+	__ieee80211_disconnect(sdata);
+}
+
+void ieee80211_beacon_loss(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_hw *hw = &sdata->local->hw;
+
+	trace_api_beacon_loss(sdata);
+
+	sdata->u.mgd.connection_loss = false;
+	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
+}
+EXPORT_SYMBOL(ieee80211_beacon_loss);
+
+void ieee80211_connection_loss(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_hw *hw = &sdata->local->hw;
+
+	trace_api_connection_loss(sdata);
+
+	sdata->u.mgd.connection_loss = true;
+	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
+}
+EXPORT_SYMBOL(ieee80211_connection_loss);
+
+
+static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
+					bool assoc)
+{
+	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
+
+	lockdep_assert_held(&sdata->u.mgd.mtx);
+
+	if (!assoc) {
+		sta_info_destroy_addr(sdata, auth_data->bss->bssid);
+
+		memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+		sdata->u.mgd.flags = 0;
+		ieee80211_vif_release_channel(sdata);
+	}
+
+	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
+	kfree(auth_data);
+	sdata->u.mgd.auth_data = NULL;
+}
+
+static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
+				     struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
+	u8 *pos;
+	struct ieee802_11_elems elems;
+	u32 tx_flags = 0;
+
+	pos = mgmt->u.auth.variable;
+	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
+	if (!elems.challenge)
+		return;
+	auth_data->expected_transaction = 4;
+	drv_mgd_prepare_tx(sdata->local, sdata);
+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
+			   IEEE80211_TX_INTFL_MLME_CONN_TX;
+	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
+			    elems.challenge - 2, elems.challenge_len + 2,
+			    auth_data->bss->bssid, auth_data->bss->bssid,
+			    auth_data->key, auth_data->key_len,
+			    auth_data->key_idx, tx_flags);
+}
+
+static enum rx_mgmt_action __must_check
+ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
+		       struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 bssid[ETH_ALEN];
+	u16 auth_alg, auth_transaction, status_code;
+	struct sta_info *sta;
+
+	lockdep_assert_held(&ifmgd->mtx);
+
+	if (len < 24 + 6)
+		return RX_MGMT_NONE;
+
+	if (!ifmgd->auth_data || ifmgd->auth_data->done)
+		return RX_MGMT_NONE;
+
+	memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
+
+	if (!ether_addr_equal(bssid, mgmt->bssid))
+		return RX_MGMT_NONE;
+
+	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
+	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
+	status_code = le16_to_cpu(mgmt->u.auth.status_code);
+
+	if (auth_alg != ifmgd->auth_data->algorithm ||
+	    auth_transaction != ifmgd->auth_data->expected_transaction) {
+		sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
+			   mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
+			   auth_transaction,
+			   ifmgd->auth_data->expected_transaction);
+		return RX_MGMT_NONE;
+	}
+
+	if (status_code != WLAN_STATUS_SUCCESS) {
+		sdata_info(sdata, "%pM denied authentication (status %d)\n",
+			   mgmt->sa, status_code);
+		ieee80211_destroy_auth_data(sdata, false);
+		return RX_MGMT_CFG80211_RX_AUTH;
+	}
+
+	switch (ifmgd->auth_data->algorithm) {
+	case WLAN_AUTH_OPEN:
+	case WLAN_AUTH_LEAP:
+	case WLAN_AUTH_FT:
+	case WLAN_AUTH_SAE:
+		break;
+	case WLAN_AUTH_SHARED_KEY:
+		if (ifmgd->auth_data->expected_transaction != 4) {
+			ieee80211_auth_challenge(sdata, mgmt, len);
+			/* need another frame */
+			return RX_MGMT_NONE;
+		}
+		break;
+	default:
+		WARN_ONCE(1, "invalid auth alg %d",
+			  ifmgd->auth_data->algorithm);
+		return RX_MGMT_NONE;
+	}
+
+	sdata_info(sdata, "authenticated\n");
+	ifmgd->auth_data->done = true;
+	ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
+	ifmgd->auth_data->timeout_started = true;
+	run_again(ifmgd, ifmgd->auth_data->timeout);
+
+	if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
+	    ifmgd->auth_data->expected_transaction != 2) {
+		/*
+		 * Report auth frame to user space for processing since another
+		 * round of Authentication frames is still needed.
+		 */
+		return RX_MGMT_CFG80211_RX_AUTH;
+	}
+
+	/* move station state to auth */
+	mutex_lock(&sdata->local->sta_mtx);
+	sta = sta_info_get(sdata, bssid);
+	if (!sta) {
+		WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
+		goto out_err;
+	}
+	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
+		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
+		goto out_err;
+	}
+	mutex_unlock(&sdata->local->sta_mtx);
+
+	return RX_MGMT_CFG80211_RX_AUTH;
+ out_err:
+	mutex_unlock(&sdata->local->sta_mtx);
+	/* ignore frame -- wait for timeout */
+	return RX_MGMT_NONE;
+}
+
+
+static enum rx_mgmt_action __must_check
+ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
+			 struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const u8 *bssid = NULL;
+	u16 reason_code;
+
+	lockdep_assert_held(&ifmgd->mtx);
+
+	if (len < 24 + 2)
+		return RX_MGMT_NONE;
+
+	if (!ifmgd->associated ||
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		return RX_MGMT_NONE;
+
+	bssid = ifmgd->associated->bssid;
+
+	reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
+
+	sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
+		   bssid, reason_code);
+
+	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
+
+	return RX_MGMT_CFG80211_DEAUTH;
+}
+
+
+static enum rx_mgmt_action __must_check
+ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
+			   struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u16 reason_code;
+
+	lockdep_assert_held(&ifmgd->mtx);
+
+	if (len < 24 + 2)
+		return RX_MGMT_NONE;
+
+	if (!ifmgd->associated ||
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		return RX_MGMT_NONE;
+
+	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
+
+	sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
+		   mgmt->sa, reason_code);
+
+	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
+
+	return RX_MGMT_CFG80211_DISASSOC;
+}
+
+static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
+				u8 *supp_rates, unsigned int supp_rates_len,
+				u32 *rates, u32 *basic_rates,
+				bool *have_higher_than_11mbit,
+				int *min_rate, int *min_rate_index)
+{
+	int i, j;
+
+	for (i = 0; i < supp_rates_len; i++) {
+		int rate = (supp_rates[i] & 0x7f) * 5;
+		bool is_basic = !!(supp_rates[i] & 0x80);
+
+		if (rate > 110)
+			*have_higher_than_11mbit = true;
+
+		/*
+		 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
+		 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
+		 *
+		 * Note: Even through the membership selector and the basic
+		 *	 rate flag share the same bit, they are not exactly
+		 *	 the same.
+		 */
+		if (!!(supp_rates[i] & 0x80) &&
+		    (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
+			continue;
+
+		for (j = 0; j < sband->n_bitrates; j++) {
+			if (sband->bitrates[j].bitrate == rate) {
+				*rates |= BIT(j);
+				if (is_basic)
+					*basic_rates |= BIT(j);
+				if (rate < *min_rate) {
+					*min_rate = rate;
+					*min_rate_index = j;
+				}
+				break;
+			}
+		}
+	}
+}
+
+static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
+					 bool assoc)
+{
+	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
+
+	lockdep_assert_held(&sdata->u.mgd.mtx);
+
+	if (!assoc) {
+		sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
+
+		memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+		sdata->u.mgd.flags = 0;
+		ieee80211_vif_release_channel(sdata);
+	}
+
+	kfree(assoc_data);
+	sdata->u.mgd.assoc_data = NULL;
+}
+
+static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
+				    struct cfg80211_bss *cbss,
+				    struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	struct sta_info *sta;
+	u8 *pos;
+	u16 capab_info, aid;
+	struct ieee802_11_elems elems;
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+	const struct cfg80211_bss_ies *bss_ies = NULL;
+	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
+	u32 changed = 0;
+	int err;
+	bool ret;
+
+	/* AssocResp and ReassocResp have identical structure */
+
+	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
+	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
+
+	if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
+		sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
+			   aid);
+	aid &= ~(BIT(15) | BIT(14));
+
+	ifmgd->broken_ap = false;
+
+	if (aid == 0 || aid > IEEE80211_MAX_AID) {
+		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
+			   aid);
+		aid = 0;
+		ifmgd->broken_ap = true;
+	}
+
+	pos = mgmt->u.assoc_resp.variable;
+	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
+
+	if (!elems.supp_rates) {
+		sdata_info(sdata, "no SuppRates element in AssocResp\n");
+		return false;
+	}
+
+	ifmgd->aid = aid;
+
+	/*
+	 * Some APs are erroneously not including some information in their
+	 * (re)association response frames. Try to recover by using the data
+	 * from the beacon or probe response. This seems to afflict mobile
+	 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
+	 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
+	 */
+	if ((assoc_data->wmm && !elems.wmm_param) ||
+	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+	     (!elems.ht_cap_elem || !elems.ht_operation)) ||
+	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
+	     (!elems.vht_cap_elem || !elems.vht_operation))) {
+		const struct cfg80211_bss_ies *ies;
+		struct ieee802_11_elems bss_elems;
+
+		rcu_read_lock();
+		ies = rcu_dereference(cbss->ies);
+		if (ies)
+			bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
+					  GFP_ATOMIC);
+		rcu_read_unlock();
+		if (!bss_ies)
+			return false;
+
+		ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
+				       false, &bss_elems);
+		if (assoc_data->wmm &&
+		    !elems.wmm_param && bss_elems.wmm_param) {
+			elems.wmm_param = bss_elems.wmm_param;
+			sdata_info(sdata,
+				   "AP bug: WMM param missing from AssocResp\n");
+		}
+
+		/*
+		 * Also check if we requested HT/VHT, otherwise the AP doesn't
+		 * have to include the IEs in the (re)association response.
+		 */
+		if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
+			elems.ht_cap_elem = bss_elems.ht_cap_elem;
+			sdata_info(sdata,
+				   "AP bug: HT capability missing from AssocResp\n");
+		}
+		if (!elems.ht_operation && bss_elems.ht_operation &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
+			elems.ht_operation = bss_elems.ht_operation;
+			sdata_info(sdata,
+				   "AP bug: HT operation missing from AssocResp\n");
+		}
+		if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
+			elems.vht_cap_elem = bss_elems.vht_cap_elem;
+			sdata_info(sdata,
+				   "AP bug: VHT capa missing from AssocResp\n");
+		}
+		if (!elems.vht_operation && bss_elems.vht_operation &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
+			elems.vht_operation = bss_elems.vht_operation;
+			sdata_info(sdata,
+				   "AP bug: VHT operation missing from AssocResp\n");
+		}
+	}
+
+	/*
+	 * We previously checked these in the beacon/probe response, so
+	 * they should be present here. This is just a safety net.
+	 */
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+	    (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
+		sdata_info(sdata,
+			   "HT AP is missing WMM params or HT capability/operation\n");
+		ret = false;
+		goto out;
+	}
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
+	    (!elems.vht_cap_elem || !elems.vht_operation)) {
+		sdata_info(sdata,
+			   "VHT AP is missing VHT capability/operation\n");
+		ret = false;
+		goto out;
+	}
+
+	mutex_lock(&sdata->local->sta_mtx);
+	/*
+	 * station info was already allocated and inserted before
+	 * the association and should be available to us
+	 */
+	sta = sta_info_get(sdata, cbss->bssid);
+	if (WARN_ON(!sta)) {
+		mutex_unlock(&sdata->local->sta_mtx);
+		ret = false;
+		goto out;
+	}
+
+	sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
+
+	/* Set up internal HT/VHT capabilities */
+	if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
+		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
+						  elems.ht_cap_elem, sta);
+
+	if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
+						    elems.vht_cap_elem, sta);
+
+	/*
+	 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
+	 * in their association response, so ignore that data for our own
+	 * configuration. If it changed since the last beacon, we'll get the
+	 * next beacon and update then.
+	 */
+
+	/*
+	 * If an operating mode notification IE is present, override the
+	 * NSS calculation (that would be done in rate_control_rate_init())
+	 * and use the # of streams from that element.
+	 */
+	if (elems.opmode_notif &&
+	    !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
+		u8 nss;
+
+		nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
+		nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
+		nss += 1;
+		sta->sta.rx_nss = nss;
+	}
+
+	rate_control_rate_init(sta);
+
+	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
+		set_sta_flag(sta, WLAN_STA_MFP);
+
+	if (elems.wmm_param)
+		set_sta_flag(sta, WLAN_STA_WME);
+
+	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
+		err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
+	if (err) {
+		sdata_info(sdata,
+			   "failed to move station %pM to desired state\n",
+			   sta->sta.addr);
+		WARN_ON(__sta_info_destroy(sta));
+		mutex_unlock(&sdata->local->sta_mtx);
+		ret = false;
+		goto out;
+	}
+
+	mutex_unlock(&sdata->local->sta_mtx);
+
+	/*
+	 * Always handle WMM once after association regardless
+	 * of the first value the AP uses. Setting -1 here has
+	 * that effect because the AP values is an unsigned
+	 * 4-bit value.
+	 */
+	ifmgd->wmm_last_param_set = -1;
+
+	if (elems.wmm_param)
+		ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
+					 elems.wmm_param_len);
+	else
+		ieee80211_set_wmm_default(sdata, false);
+	changed |= BSS_CHANGED_QOS;
+
+	/* set AID and assoc capability,
+	 * ieee80211_set_associated() will tell the driver */
+	bss_conf->aid = aid;
+	bss_conf->assoc_capability = capab_info;
+	ieee80211_set_associated(sdata, cbss, changed);
+
+	/*
+	 * If we're using 4-addr mode, let the AP know that we're
+	 * doing so, so that it can create the STA VLAN on its side
+	 */
+	if (ifmgd->use_4addr)
+		ieee80211_send_4addr_nullfunc(local, sdata);
+
+	/*
+	 * Start timer to probe the connection to the AP now.
+	 * Also start the timer that will detect beacon loss.
+	 */
+	ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
+	ieee80211_sta_reset_beacon_monitor(sdata);
+
+	ret = true;
+ out:
+	kfree(bss_ies);
+	return ret;
+}
+
+static enum rx_mgmt_action __must_check
+ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_mgmt *mgmt, size_t len,
+			     struct cfg80211_bss **bss)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
+	u16 capab_info, status_code, aid;
+	struct ieee802_11_elems elems;
+	u8 *pos;
+	bool reassoc;
+
+	lockdep_assert_held(&ifmgd->mtx);
+
+	if (!assoc_data)
+		return RX_MGMT_NONE;
+	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
+		return RX_MGMT_NONE;
+
+	/*
+	 * AssocResp and ReassocResp have identical structure, so process both
+	 * of them in this function.
+	 */
+
+	if (len < 24 + 6)
+		return RX_MGMT_NONE;
+
+	reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
+	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
+	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
+	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
+
+	sdata_info(sdata,
+		   "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
+		   reassoc ? "Rea" : "A", mgmt->sa,
+		   capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
+
+	pos = mgmt->u.assoc_resp.variable;
+	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
+
+	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
+	    elems.timeout_int &&
+	    elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
+		u32 tu, ms;
+		tu = le32_to_cpu(elems.timeout_int->value);
+		ms = tu * 1024 / 1000;
+		sdata_info(sdata,
+			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
+			   mgmt->sa, tu, ms);
+		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
+		assoc_data->timeout_started = true;
+		if (ms > IEEE80211_ASSOC_TIMEOUT)
+			run_again(ifmgd, assoc_data->timeout);
+		return RX_MGMT_NONE;
+	}
+
+	*bss = assoc_data->bss;
+
+	if (status_code != WLAN_STATUS_SUCCESS) {
+		sdata_info(sdata, "%pM denied association (code=%d)\n",
+			   mgmt->sa, status_code);
+		ieee80211_destroy_assoc_data(sdata, false);
+	} else {
+		if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
+			/* oops -- internal error -- send timeout for now */
+			ieee80211_destroy_assoc_data(sdata, false);
+			cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
+			return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
+		}
+		sdata_info(sdata, "associated\n");
+
+		/*
+		 * destroy assoc_data afterwards, as otherwise an idle
+		 * recalc after assoc_data is NULL but before associated
+		 * is set can cause the interface to go idle
+		 */
+		ieee80211_destroy_assoc_data(sdata, true);
+	}
+
+	return RX_MGMT_CFG80211_RX_ASSOC;
+}
+
+static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
+				  struct ieee80211_mgmt *mgmt, size_t len,
+				  struct ieee80211_rx_status *rx_status,
+				  struct ieee802_11_elems *elems)
+{
+	struct ieee80211_local *local = sdata->local;
+	int freq;
+	struct ieee80211_bss *bss;
+	struct ieee80211_channel *channel;
+	bool need_ps = false;
+
+	lockdep_assert_held(&sdata->u.mgd.mtx);
+
+	if ((sdata->u.mgd.associated &&
+	     ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
+	    (sdata->u.mgd.assoc_data &&
+	     ether_addr_equal(mgmt->bssid,
+			      sdata->u.mgd.assoc_data->bss->bssid))) {
+		/* not previously set so we may need to recalc */
+		need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
+
+		if (elems->tim && !elems->parse_error) {
+			const struct ieee80211_tim_ie *tim_ie = elems->tim;
+			sdata->u.mgd.dtim_period = tim_ie->dtim_period;
+		}
+	}
+
+	if (elems->ds_params)
+		freq = ieee80211_channel_to_frequency(elems->ds_params[0],
+						      rx_status->band);
+	else
+		freq = rx_status->freq;
+
+	channel = ieee80211_get_channel(local->hw.wiphy, freq);
+
+	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+		return;
+
+	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
+					channel);
+	if (bss)
+		ieee80211_rx_bss_put(local, bss);
+
+	if (!sdata->u.mgd.associated ||
+	    !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
+		return;
+
+	if (need_ps) {
+		mutex_lock(&local->iflist_mtx);
+		ieee80211_recalc_ps(local, -1);
+		mutex_unlock(&local->iflist_mtx);
+	}
+
+	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
+					 elems, true);
+
+}
+
+
+static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
+					 struct sk_buff *skb)
+{
+	struct ieee80211_mgmt *mgmt = (void *)skb->data;
+	struct ieee80211_if_managed *ifmgd;
+	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
+	size_t baselen, len = skb->len;
+	struct ieee802_11_elems elems;
+
+	ifmgd = &sdata->u.mgd;
+
+	ASSERT_MGD_MTX(ifmgd);
+
+	if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
+		return; /* ignore ProbeResp to foreign address */
+
+	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
+	if (baselen > len)
+		return;
+
+	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
+			       false, &elems);
+
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
+
+	if (ifmgd->associated &&
+	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		ieee80211_reset_ap_probe(sdata);
+
+	if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
+	    ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
+		/* got probe response, continue with auth */
+		sdata_info(sdata, "direct probe responded\n");
+		ifmgd->auth_data->tries = 0;
+		ifmgd->auth_data->timeout = jiffies;
+		ifmgd->auth_data->timeout_started = true;
+		run_again(ifmgd, ifmgd->auth_data->timeout);
+	}
+}
+
+/*
+ * This is the canonical list of information elements we care about,
+ * the filter code also gives us all changes to the Microsoft OUI
+ * (00:50:F2) vendor IE which is used for WMM which we need to track.
+ *
+ * We implement beacon filtering in software since that means we can
+ * avoid processing the frame here and in cfg80211, and userspace
+ * will not be able to tell whether the hardware supports it or not.
+ *
+ * XXX: This list needs to be dynamic -- userspace needs to be able to
+ *	add items it requires. It also needs to be able to tell us to
+ *	look out for other vendor IEs.
+ */
+static const u64 care_about_ies =
+	(1ULL << WLAN_EID_COUNTRY) |
+	(1ULL << WLAN_EID_ERP_INFO) |
+	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
+	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
+	(1ULL << WLAN_EID_HT_CAPABILITY) |
+	(1ULL << WLAN_EID_HT_OPERATION);
+
+static enum rx_mgmt_action
+ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
+			 struct ieee80211_mgmt *mgmt, size_t len,
+			 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+	size_t baselen;
+	struct ieee802_11_elems elems;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *chan;
+	struct sta_info *sta;
+	u32 changed = 0;
+	bool erp_valid;
+	u8 erp_value = 0;
+	u32 ncrc;
+	u8 *bssid;
+
+	lockdep_assert_held(&ifmgd->mtx);
+
+	/* Process beacon from the current BSS */
+	baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
+	if (baselen > len)
+		return RX_MGMT_NONE;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!chanctx_conf) {
+		rcu_read_unlock();
+		return RX_MGMT_NONE;
+	}
+
+	if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
+		rcu_read_unlock();
+		return RX_MGMT_NONE;
+	}
+	chan = chanctx_conf->def.chan;
+	rcu_read_unlock();
+
+	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
+	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
+		ieee802_11_parse_elems(mgmt->u.beacon.variable,
+				       len - baselen, false, &elems);
+
+		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
+		ifmgd->assoc_data->have_beacon = true;
+		ifmgd->assoc_data->need_beacon = false;
+		if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
+			sdata->vif.bss_conf.sync_tsf =
+				le64_to_cpu(mgmt->u.beacon.timestamp);
+			sdata->vif.bss_conf.sync_device_ts =
+				rx_status->device_timestamp;
+			if (elems.tim)
+				sdata->vif.bss_conf.sync_dtim_count =
+					elems.tim->dtim_count;
+			else
+				sdata->vif.bss_conf.sync_dtim_count = 0;
+		}
+		/* continue assoc process */
+		ifmgd->assoc_data->timeout = jiffies;
+		ifmgd->assoc_data->timeout_started = true;
+		run_again(ifmgd, ifmgd->assoc_data->timeout);
+		return RX_MGMT_NONE;
+	}
+
+	if (!ifmgd->associated ||
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		return RX_MGMT_NONE;
+	bssid = ifmgd->associated->bssid;
+
+	/* Track average RSSI from the Beacon frames of the current AP */
+	ifmgd->last_beacon_signal = rx_status->signal;
+	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
+		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
+		ifmgd->ave_beacon_signal = rx_status->signal * 16;
+		ifmgd->last_cqm_event_signal = 0;
+		ifmgd->count_beacon_signal = 1;
+		ifmgd->last_ave_beacon_signal = 0;
+	} else {
+		ifmgd->ave_beacon_signal =
+			(IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
+			 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
+			 ifmgd->ave_beacon_signal) / 16;
+		ifmgd->count_beacon_signal++;
+	}
+
+	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
+	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
+		int sig = ifmgd->ave_beacon_signal;
+		int last_sig = ifmgd->last_ave_beacon_signal;
+
+		/*
+		 * if signal crosses either of the boundaries, invoke callback
+		 * with appropriate parameters
+		 */
+		if (sig > ifmgd->rssi_max_thold &&
+		    (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
+			ifmgd->last_ave_beacon_signal = sig;
+			drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
+		} else if (sig < ifmgd->rssi_min_thold &&
+			   (last_sig >= ifmgd->rssi_max_thold ||
+			   last_sig == 0)) {
+			ifmgd->last_ave_beacon_signal = sig;
+			drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
+		}
+	}
+
+	if (bss_conf->cqm_rssi_thold &&
+	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
+	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
+		int sig = ifmgd->ave_beacon_signal / 16;
+		int last_event = ifmgd->last_cqm_event_signal;
+		int thold = bss_conf->cqm_rssi_thold;
+		int hyst = bss_conf->cqm_rssi_hyst;
+		if (sig < thold &&
+		    (last_event == 0 || sig < last_event - hyst)) {
+			ifmgd->last_cqm_event_signal = sig;
+			ieee80211_cqm_rssi_notify(
+				&sdata->vif,
+				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
+				GFP_KERNEL);
+		} else if (sig > thold &&
+			   (last_event == 0 || sig > last_event + hyst)) {
+			ifmgd->last_cqm_event_signal = sig;
+			ieee80211_cqm_rssi_notify(
+				&sdata->vif,
+				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
+				GFP_KERNEL);
+		}
+	}
+
+	if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
+		mlme_dbg_ratelimited(sdata,
+				     "cancelling AP probe due to a received beacon\n");
+		mutex_lock(&local->mtx);
+		ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
+		ieee80211_run_deferred_scan(local);
+		mutex_unlock(&local->mtx);
+
+		mutex_lock(&local->iflist_mtx);
+		ieee80211_recalc_ps(local, -1);
+		mutex_unlock(&local->iflist_mtx);
+	}
+
+	/*
+	 * Push the beacon loss detection into the future since
+	 * we are processing a beacon from the AP just now.
+	 */
+	ieee80211_sta_reset_beacon_monitor(sdata);
+
+	ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
+	ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
+					  len - baselen, false, &elems,
+					  care_about_ies, ncrc);
+
+	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
+		bool directed_tim = ieee80211_check_tim(elems.tim,
+							elems.tim_len,
+							ifmgd->aid);
+		if (directed_tim) {
+			if (local->hw.conf.dynamic_ps_timeout > 0) {
+				if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+					local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+					ieee80211_hw_config(local,
+							    IEEE80211_CONF_CHANGE_PS);
+				}
+				ieee80211_send_nullfunc(local, sdata, 0);
+			} else if (!local->pspolling && sdata->u.mgd.powersave) {
+				local->pspolling = true;
+
+				/*
+				 * Here is assumed that the driver will be
+				 * able to send ps-poll frame and receive a
+				 * response even though power save mode is
+				 * enabled, but some drivers might require
+				 * to disable power save here. This needs
+				 * to be investigated.
+				 */
+				ieee80211_send_pspoll(local, sdata);
+			}
+		}
+	}
+
+	if (sdata->vif.p2p) {
+		struct ieee80211_p2p_noa_attr noa = {};
+		int ret;
+
+		ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
+					    len - baselen,
+					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
+					    (u8 *) &noa, sizeof(noa));
+		if (ret >= 2) {
+			if (sdata->u.mgd.p2p_noa_index != noa.index) {
+				/* valid noa_attr and index changed */
+				sdata->u.mgd.p2p_noa_index = noa.index;
+				memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
+				changed |= BSS_CHANGED_P2P_PS;
+				/*
+				 * make sure we update all information, the CRC
+				 * mechanism doesn't look at P2P attributes.
+				 */
+				ifmgd->beacon_crc_valid = false;
+			}
+		} else if (sdata->u.mgd.p2p_noa_index != -1) {
+			/* noa_attr not found and we had valid noa_attr before */
+			sdata->u.mgd.p2p_noa_index = -1;
+			memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
+			changed |= BSS_CHANGED_P2P_PS;
+			ifmgd->beacon_crc_valid = false;
+		}
+	}
+
+	if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
+		return RX_MGMT_NONE;
+	ifmgd->beacon_crc = ncrc;
+	ifmgd->beacon_crc_valid = true;
+
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
+
+	if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
+				     elems.wmm_param_len))
+		changed |= BSS_CHANGED_QOS;
+
+	/*
+	 * If we haven't had a beacon before, tell the driver about the
+	 * DTIM period (and beacon timing if desired) now.
+	 */
+	if (!bss_conf->dtim_period) {
+		/* a few bogus AP send dtim_period = 0 or no TIM IE */
+		if (elems.tim)
+			bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
+		else
+			bss_conf->dtim_period = 1;
+
+		if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
+			sdata->vif.bss_conf.sync_tsf =
+				le64_to_cpu(mgmt->u.beacon.timestamp);
+			sdata->vif.bss_conf.sync_device_ts =
+				rx_status->device_timestamp;
+			if (elems.tim)
+				sdata->vif.bss_conf.sync_dtim_count =
+					elems.tim->dtim_count;
+			else
+				sdata->vif.bss_conf.sync_dtim_count = 0;
+		}
+
+		changed |= BSS_CHANGED_DTIM_PERIOD;
+	}
+
+	if (elems.erp_info) {
+		erp_valid = true;
+		erp_value = elems.erp_info[0];
+	} else {
+		erp_valid = false;
+	}
+	changed |= ieee80211_handle_bss_capability(sdata,
+			le16_to_cpu(mgmt->u.beacon.capab_info),
+			erp_valid, erp_value);
+
+	mutex_lock(&local->sta_mtx);
+	sta = sta_info_get(sdata, bssid);
+
+	if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
+				elems.vht_operation, bssid, &changed)) {
+		mutex_unlock(&local->sta_mtx);
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       WLAN_REASON_DEAUTH_LEAVING,
+				       true, deauth_buf);
+		return RX_MGMT_CFG80211_TX_DEAUTH;
+	}
+
+	if (sta && elems.opmode_notif)
+		ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
+					    rx_status->band, true);
+	mutex_unlock(&local->sta_mtx);
+
+	if (elems.country_elem && elems.pwr_constr_elem &&
+	    mgmt->u.probe_resp.capab_info &
+				cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
+		changed |= ieee80211_handle_pwr_constr(sdata, chan,
+						       elems.country_elem,
+						       elems.country_elem_len,
+						       elems.pwr_constr_elem);
+
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	return RX_MGMT_NONE;
+}
+
+void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				  struct sk_buff *skb)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_rx_status *rx_status;
+	struct ieee80211_mgmt *mgmt;
+	struct cfg80211_bss *bss = NULL;
+	enum rx_mgmt_action rma = RX_MGMT_NONE;
+	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
+	u16 fc;
+	struct ieee802_11_elems elems;
+	int ies_len;
+
+	rx_status = (struct ieee80211_rx_status *) skb->cb;
+	mgmt = (struct ieee80211_mgmt *) skb->data;
+	fc = le16_to_cpu(mgmt->frame_control);
+
+	mutex_lock(&ifmgd->mtx);
+
+	switch (fc & IEEE80211_FCTL_STYPE) {
+	case IEEE80211_STYPE_BEACON:
+		rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
+					       deauth_buf, rx_status);
+		break;
+	case IEEE80211_STYPE_PROBE_RESP:
+		ieee80211_rx_mgmt_probe_resp(sdata, skb);
+		break;
+	case IEEE80211_STYPE_AUTH:
+		rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_DEAUTH:
+		rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_DISASSOC:
+		rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_ASSOC_RESP:
+	case IEEE80211_STYPE_REASSOC_RESP:
+		rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
+		break;
+	case IEEE80211_STYPE_ACTION:
+		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
+			ies_len = skb->len -
+				  offsetof(struct ieee80211_mgmt,
+					   u.action.u.chan_switch.variable);
+
+			if (ies_len < 0)
+				break;
+
+			ieee802_11_parse_elems(
+				mgmt->u.action.u.chan_switch.variable,
+				ies_len, true, &elems);
+
+			if (elems.parse_error)
+				break;
+
+			ieee80211_sta_process_chanswitch(sdata,
+							 rx_status->mactime,
+							 &elems, false);
+		} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
+			ies_len = skb->len -
+				  offsetof(struct ieee80211_mgmt,
+					   u.action.u.ext_chan_switch.variable);
+
+			if (ies_len < 0)
+				break;
+
+			ieee802_11_parse_elems(
+				mgmt->u.action.u.ext_chan_switch.variable,
+				ies_len, true, &elems);
+
+			if (elems.parse_error)
+				break;
+
+			/* for the handling code pretend this was also an IE */
+			elems.ext_chansw_ie =
+				&mgmt->u.action.u.ext_chan_switch.data;
+
+			ieee80211_sta_process_chanswitch(sdata,
+							 rx_status->mactime,
+							 &elems, false);
+		}
+		break;
+	}
+	mutex_unlock(&ifmgd->mtx);
+
+	switch (rma) {
+	case RX_MGMT_NONE:
+		/* no action */
+		break;
+	case RX_MGMT_CFG80211_DEAUTH:
+		cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
+		break;
+	case RX_MGMT_CFG80211_DISASSOC:
+		cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
+		break;
+	case RX_MGMT_CFG80211_RX_AUTH:
+		cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
+		break;
+	case RX_MGMT_CFG80211_RX_ASSOC:
+		cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
+		break;
+	case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
+		cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
+		break;
+	case RX_MGMT_CFG80211_TX_DEAUTH:
+		cfg80211_send_deauth(sdata->dev, deauth_buf,
+				     sizeof(deauth_buf));
+		break;
+	default:
+		WARN(1, "unexpected: %d", rma);
+	}
+}
+
+static void ieee80211_sta_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+}
+
+static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
+					  u8 *bssid, u8 reason, bool tx)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
+			       tx, frame_buf);
+	mutex_unlock(&ifmgd->mtx);
+
+	/*
+	 * must be outside lock due to cfg80211,
+	 * but that's not a problem.
+	 */
+	cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
+
+	mutex_lock(&ifmgd->mtx);
+}
+
+static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
+	u32 tx_flags = 0;
+
+	lockdep_assert_held(&ifmgd->mtx);
+
+	if (WARN_ON_ONCE(!auth_data))
+		return -EINVAL;
+
+	auth_data->tries++;
+
+	if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
+		sdata_info(sdata, "authentication with %pM timed out\n",
+			   auth_data->bss->bssid);
+
+		/*
+		 * Most likely AP is not in the range so remove the
+		 * bss struct for that AP.
+		 */
+		cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
+
+		return -ETIMEDOUT;
+	}
+
+	drv_mgd_prepare_tx(local, sdata);
+
+	if (auth_data->bss->proberesp_ies) {
+		u16 trans = 1;
+		u16 status = 0;
+
+		sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
+			   auth_data->bss->bssid, auth_data->tries,
+			   IEEE80211_AUTH_MAX_TRIES);
+
+		auth_data->expected_transaction = 2;
+
+		if (auth_data->algorithm == WLAN_AUTH_SAE) {
+			trans = auth_data->sae_trans;
+			status = auth_data->sae_status;
+			auth_data->expected_transaction = trans;
+		}
+
+		if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+			tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
+				   IEEE80211_TX_INTFL_MLME_CONN_TX;
+
+		ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
+				    auth_data->data, auth_data->data_len,
+				    auth_data->bss->bssid,
+				    auth_data->bss->bssid, NULL, 0, 0,
+				    tx_flags);
+	} else {
+		const u8 *ssidie;
+
+		sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
+			   auth_data->bss->bssid, auth_data->tries,
+			   IEEE80211_AUTH_MAX_TRIES);
+
+		rcu_read_lock();
+		ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
+		if (!ssidie) {
+			rcu_read_unlock();
+			return -EINVAL;
+		}
+		/*
+		 * Direct probe is sent to broadcast address as some APs
+		 * will not answer to direct packet in unassociated state.
+		 */
+		ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
+					 NULL, 0, (u32) -1, true, 0,
+					 auth_data->bss->channel, false);
+		rcu_read_unlock();
+	}
+
+	if (tx_flags == 0) {
+		auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
+		auth_data->timeout_started = true;
+		run_again(ifmgd, auth_data->timeout);
+	} else {
+		auth_data->timeout =
+			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
+		auth_data->timeout_started = true;
+		run_again(ifmgd, auth_data->timeout);
+	}
+
+	return 0;
+}
+
+static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
+	struct ieee80211_local *local = sdata->local;
+
+	lockdep_assert_held(&sdata->u.mgd.mtx);
+
+	assoc_data->tries++;
+	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
+		sdata_info(sdata, "association with %pM timed out\n",
+			   assoc_data->bss->bssid);
+
+		/*
+		 * Most likely AP is not in the range so remove the
+		 * bss struct for that AP.
+		 */
+		cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
+
+		return -ETIMEDOUT;
+	}
+
+	sdata_info(sdata, "associate with %pM (try %d/%d)\n",
+		   assoc_data->bss->bssid, assoc_data->tries,
+		   IEEE80211_ASSOC_MAX_TRIES);
+	ieee80211_send_assoc(sdata);
+
+	if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
+		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
+		assoc_data->timeout_started = true;
+		run_again(&sdata->u.mgd, assoc_data->timeout);
+	} else {
+		assoc_data->timeout =
+			round_jiffies_up(jiffies +
+					 IEEE80211_ASSOC_TIMEOUT_LONG);
+		assoc_data->timeout_started = true;
+		run_again(&sdata->u.mgd, assoc_data->timeout);
+	}
+
+	return 0;
+}
+
+void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
+				  __le16 fc, bool acked)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	sdata->u.mgd.status_fc = fc;
+	sdata->u.mgd.status_acked = acked;
+	sdata->u.mgd.status_received = true;
+
+	ieee80211_queue_work(&local->hw, &sdata->work);
+}
+
+void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	mutex_lock(&ifmgd->mtx);
+
+	if (ifmgd->status_received) {
+		__le16 fc = ifmgd->status_fc;
+		bool status_acked = ifmgd->status_acked;
+
+		ifmgd->status_received = false;
+		if (ifmgd->auth_data &&
+		    (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
+			if (status_acked) {
+				ifmgd->auth_data->timeout =
+					jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
+				run_again(ifmgd, ifmgd->auth_data->timeout);
+			} else {
+				ifmgd->auth_data->timeout = jiffies - 1;
+			}
+			ifmgd->auth_data->timeout_started = true;
+		} else if (ifmgd->assoc_data &&
+			   (ieee80211_is_assoc_req(fc) ||
+			    ieee80211_is_reassoc_req(fc))) {
+			if (status_acked) {
+				ifmgd->assoc_data->timeout =
+					jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
+				run_again(ifmgd, ifmgd->assoc_data->timeout);
+			} else {
+				ifmgd->assoc_data->timeout = jiffies - 1;
+			}
+			ifmgd->assoc_data->timeout_started = true;
+		}
+	}
+
+	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
+	    time_after(jiffies, ifmgd->auth_data->timeout)) {
+		if (ifmgd->auth_data->done) {
+			/*
+			 * ok ... we waited for assoc but userspace didn't,
+			 * so let's just kill the auth data
+			 */
+			ieee80211_destroy_auth_data(sdata, false);
+		} else if (ieee80211_probe_auth(sdata)) {
+			u8 bssid[ETH_ALEN];
+
+			memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
+
+			ieee80211_destroy_auth_data(sdata, false);
+
+			mutex_unlock(&ifmgd->mtx);
+			cfg80211_send_auth_timeout(sdata->dev, bssid);
+			mutex_lock(&ifmgd->mtx);
+		}
+	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
+		run_again(ifmgd, ifmgd->auth_data->timeout);
+
+	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
+	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
+		if ((ifmgd->assoc_data->need_beacon &&
+		     !ifmgd->assoc_data->have_beacon) ||
+		    ieee80211_do_assoc(sdata)) {
+			u8 bssid[ETH_ALEN];
+
+			memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
+
+			ieee80211_destroy_assoc_data(sdata, false);
+
+			mutex_unlock(&ifmgd->mtx);
+			cfg80211_send_assoc_timeout(sdata->dev, bssid);
+			mutex_lock(&ifmgd->mtx);
+		}
+	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
+		run_again(ifmgd, ifmgd->assoc_data->timeout);
+
+	if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
+			    IEEE80211_STA_CONNECTION_POLL) &&
+	    ifmgd->associated) {
+		u8 bssid[ETH_ALEN];
+		int max_tries;
+
+		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
+
+		if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+			max_tries = max_nullfunc_tries;
+		else
+			max_tries = max_probe_tries;
+
+		/* ACK received for nullfunc probing frame */
+		if (!ifmgd->probe_send_count)
+			ieee80211_reset_ap_probe(sdata);
+		else if (ifmgd->nullfunc_failed) {
+			if (ifmgd->probe_send_count < max_tries) {
+				mlme_dbg(sdata,
+					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
+					 bssid, ifmgd->probe_send_count,
+					 max_tries);
+				ieee80211_mgd_probe_ap_send(sdata);
+			} else {
+				mlme_dbg(sdata,
+					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
+					 bssid);
+				ieee80211_sta_connection_lost(sdata, bssid,
+					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
+					false);
+			}
+		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
+			run_again(ifmgd, ifmgd->probe_timeout);
+		else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
+			mlme_dbg(sdata,
+				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
+				 bssid, probe_wait_ms);
+			ieee80211_sta_connection_lost(sdata, bssid,
+				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
+		} else if (ifmgd->probe_send_count < max_tries) {
+			mlme_dbg(sdata,
+				 "No probe response from AP %pM after %dms, try %d/%i\n",
+				 bssid, probe_wait_ms,
+				 ifmgd->probe_send_count, max_tries);
+			ieee80211_mgd_probe_ap_send(sdata);
+		} else {
+			/*
+			 * We actually lost the connection ... or did we?
+			 * Let's make sure!
+			 */
+			wiphy_debug(local->hw.wiphy,
+				    "%s: No probe response from AP %pM"
+				    " after %dms, disconnecting.\n",
+				    sdata->name,
+				    bssid, probe_wait_ms);
+
+			ieee80211_sta_connection_lost(sdata, bssid,
+				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
+		}
+	}
+
+	mutex_unlock(&ifmgd->mtx);
+}
+
+static void ieee80211_sta_bcn_mon_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+	struct ieee80211_local *local = sdata->local;
+
+	if (local->quiescing)
+		return;
+
+	sdata->u.mgd.connection_loss = false;
+	ieee80211_queue_work(&sdata->local->hw,
+			     &sdata->u.mgd.beacon_connection_loss_work);
+}
+
+static void ieee80211_sta_conn_mon_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+
+	if (local->quiescing)
+		return;
+
+	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
+}
+
+static void ieee80211_sta_monitor_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.monitor_work);
+
+	ieee80211_mgd_probe_ap(sdata, false);
+}
+
+static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
+{
+	u32 flags;
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+		__ieee80211_stop_poll(sdata);
+
+		/* let's probe the connection once */
+		flags = sdata->local->hw.flags;
+		if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
+			ieee80211_queue_work(&sdata->local->hw,
+					     &sdata->u.mgd.monitor_work);
+		/* and do all the other regular work too */
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+	}
+}
+
+#ifdef CONFIG_PM
+void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	mutex_lock(&ifmgd->mtx);
+	if (!ifmgd->associated) {
+		mutex_unlock(&ifmgd->mtx);
+		return;
+	}
+
+	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
+		sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
+		mlme_dbg(sdata, "driver requested disconnect after resume\n");
+		ieee80211_sta_connection_lost(sdata,
+					      ifmgd->associated->bssid,
+					      WLAN_REASON_UNSPECIFIED,
+					      true);
+		mutex_unlock(&ifmgd->mtx);
+		return;
+	}
+	mutex_unlock(&ifmgd->mtx);
+}
+#endif
+
+/* interface setup */
+void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd;
+
+	ifmgd = &sdata->u.mgd;
+	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
+	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
+	INIT_WORK(&ifmgd->beacon_connection_loss_work,
+		  ieee80211_beacon_connection_loss_work);
+	INIT_WORK(&ifmgd->csa_connection_drop_work,
+		  ieee80211_csa_connection_drop_work);
+	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
+	setup_timer(&ifmgd->timer, ieee80211_sta_timer,
+		    (unsigned long) sdata);
+	setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
+		    (unsigned long) sdata);
+	setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
+		    (unsigned long) sdata);
+	setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
+		    (unsigned long) sdata);
+
+	ifmgd->flags = 0;
+	ifmgd->powersave = sdata->wdev.ps;
+	ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
+	ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
+	ifmgd->p2p_noa_index = -1;
+
+	mutex_init(&ifmgd->mtx);
+
+	if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
+		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
+	else
+		ifmgd->req_smps = IEEE80211_SMPS_OFF;
+}
+
+/* scan finished notification */
+void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	/* Restart STA timers */
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (ieee80211_sdata_running(sdata))
+			ieee80211_restart_sta_timer(sdata);
+	}
+	rcu_read_unlock();
+}
+
+int ieee80211_max_network_latency(struct notifier_block *nb,
+				  unsigned long data, void *dummy)
+{
+	s32 latency_usec = (s32) data;
+	struct ieee80211_local *local =
+		container_of(nb, struct ieee80211_local,
+			     network_latency_notifier);
+
+	mutex_lock(&local->iflist_mtx);
+	ieee80211_recalc_ps(local, latency_usec);
+	mutex_unlock(&local->iflist_mtx);
+
+	return 0;
+}
+
+static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
+				     struct cfg80211_bss *cbss)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const u8 *ht_cap_ie, *vht_cap_ie;
+	const struct ieee80211_ht_cap *ht_cap;
+	const struct ieee80211_vht_cap *vht_cap;
+	u8 chains = 1;
+
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
+		return chains;
+
+	ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
+	if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
+		ht_cap = (void *)(ht_cap_ie + 2);
+		chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
+		/*
+		 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
+		 *	 "Tx Unequal Modulation Supported" fields.
+		 */
+	}
+
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
+		return chains;
+
+	vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
+	if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
+		u8 nss;
+		u16 tx_mcs_map;
+
+		vht_cap = (void *)(vht_cap_ie + 2);
+		tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
+		for (nss = 8; nss > 0; nss--) {
+			if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
+					IEEE80211_VHT_MCS_NOT_SUPPORTED)
+				break;
+		}
+		/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
+		chains = max(chains, nss);
+	}
+
+	return chains;
+}
+
+static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
+				  struct cfg80211_bss *cbss)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const struct ieee80211_ht_operation *ht_oper = NULL;
+	const struct ieee80211_vht_operation *vht_oper = NULL;
+	struct ieee80211_supported_band *sband;
+	struct cfg80211_chan_def chandef;
+	int ret;
+
+	sband = local->hw.wiphy->bands[cbss->channel->band];
+
+	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
+			  IEEE80211_STA_DISABLE_80P80MHZ |
+			  IEEE80211_STA_DISABLE_160MHZ);
+
+	rcu_read_lock();
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+	    sband->ht_cap.ht_supported) {
+		const u8 *ht_oper_ie, *ht_cap;
+
+		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
+		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
+			ht_oper = (void *)(ht_oper_ie + 2);
+
+		ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
+		if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
+			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+			ht_oper = NULL;
+		}
+	}
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
+	    sband->vht_cap.vht_supported) {
+		const u8 *vht_oper_ie, *vht_cap;
+
+		vht_oper_ie = ieee80211_bss_get_ie(cbss,
+						   WLAN_EID_VHT_OPERATION);
+		if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
+			vht_oper = (void *)(vht_oper_ie + 2);
+		if (vht_oper && !ht_oper) {
+			vht_oper = NULL;
+			sdata_info(sdata,
+				   "AP advertised VHT without HT, disabling both\n");
+			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+		}
+
+		vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
+		if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
+			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+			vht_oper = NULL;
+		}
+	}
+
+	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
+						     cbss->channel,
+						     ht_oper, vht_oper,
+						     &chandef, false);
+
+	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
+				      local->rx_chains);
+
+	rcu_read_unlock();
+
+	/* will change later if needed */
+	sdata->smps_mode = IEEE80211_SMPS_OFF;
+
+	/*
+	 * If this fails (possibly due to channel context sharing
+	 * on incompatible channels, e.g. 80+80 and 160 sharing the
+	 * same control channel) try to use a smaller bandwidth.
+	 */
+	ret = ieee80211_vif_use_channel(sdata, &chandef,
+					IEEE80211_CHANCTX_SHARED);
+	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
+		ifmgd->flags |= chandef_downgrade(&chandef);
+		ret = ieee80211_vif_use_channel(sdata, &chandef,
+						IEEE80211_CHANCTX_SHARED);
+	}
+	return ret;
+}
+
+static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
+				     struct cfg80211_bss *cbss, bool assoc)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_bss *bss = (void *)cbss->priv;
+	struct sta_info *new_sta = NULL;
+	bool have_sta = false;
+	int err;
+
+	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
+		return -EINVAL;
+
+	if (assoc) {
+		rcu_read_lock();
+		have_sta = sta_info_get(sdata, cbss->bssid);
+		rcu_read_unlock();
+	}
+
+	if (!have_sta) {
+		new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
+		if (!new_sta)
+			return -ENOMEM;
+	}
+
+	if (new_sta) {
+		u32 rates = 0, basic_rates = 0;
+		bool have_higher_than_11mbit;
+		int min_rate = INT_MAX, min_rate_index = -1;
+		struct ieee80211_supported_band *sband;
+		const struct cfg80211_bss_ies *ies;
+
+		sband = local->hw.wiphy->bands[cbss->channel->band];
+
+		err = ieee80211_prep_channel(sdata, cbss);
+		if (err) {
+			sta_info_free(local, new_sta);
+			return err;
+		}
+
+		ieee80211_get_rates(sband, bss->supp_rates,
+				    bss->supp_rates_len,
+				    &rates, &basic_rates,
+				    &have_higher_than_11mbit,
+				    &min_rate, &min_rate_index);
+
+		/*
+		 * This used to be a workaround for basic rates missing
+		 * in the association response frame. Now that we no
+		 * longer use the basic rates from there, it probably
+		 * doesn't happen any more, but keep the workaround so
+		 * in case some *other* APs are buggy in different ways
+		 * we can connect -- with a warning.
+		 */
+		if (!basic_rates && min_rate_index >= 0) {
+			sdata_info(sdata,
+				   "No basic rates, using min rate instead\n");
+			basic_rates = BIT(min_rate_index);
+		}
+
+		new_sta->sta.supp_rates[cbss->channel->band] = rates;
+		sdata->vif.bss_conf.basic_rates = basic_rates;
+
+		/* cf. IEEE 802.11 9.2.12 */
+		if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
+		    have_higher_than_11mbit)
+			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
+		else
+			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
+
+		memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
+
+		/* set timing information */
+		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
+		rcu_read_lock();
+		ies = rcu_dereference(cbss->beacon_ies);
+		if (ies) {
+			const u8 *tim_ie;
+
+			sdata->vif.bss_conf.sync_tsf = ies->tsf;
+			sdata->vif.bss_conf.sync_device_ts =
+				bss->device_ts_beacon;
+			tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
+						  ies->data, ies->len);
+			if (tim_ie && tim_ie[1] >= 2)
+				sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
+			else
+				sdata->vif.bss_conf.sync_dtim_count = 0;
+		} else if (!(local->hw.flags &
+					IEEE80211_HW_TIMING_BEACON_ONLY)) {
+			ies = rcu_dereference(cbss->proberesp_ies);
+			/* must be non-NULL since beacon IEs were NULL */
+			sdata->vif.bss_conf.sync_tsf = ies->tsf;
+			sdata->vif.bss_conf.sync_device_ts =
+				bss->device_ts_presp;
+			sdata->vif.bss_conf.sync_dtim_count = 0;
+		} else {
+			sdata->vif.bss_conf.sync_tsf = 0;
+			sdata->vif.bss_conf.sync_device_ts = 0;
+			sdata->vif.bss_conf.sync_dtim_count = 0;
+		}
+		rcu_read_unlock();
+
+		/* tell driver about BSSID, basic rates and timing */
+		ieee80211_bss_info_change_notify(sdata,
+			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
+			BSS_CHANGED_BEACON_INT);
+
+		if (assoc)
+			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
+
+		err = sta_info_insert(new_sta);
+		new_sta = NULL;
+		if (err) {
+			sdata_info(sdata,
+				   "failed to insert STA entry for the AP (error %d)\n",
+				   err);
+			return err;
+		}
+	} else
+		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
+
+	return 0;
+}
+
+/* config hooks */
+int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
+		       struct cfg80211_auth_request *req)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_auth_data *auth_data;
+	u16 auth_alg;
+	int err;
+
+	/* prepare auth data structure */
+
+	switch (req->auth_type) {
+	case NL80211_AUTHTYPE_OPEN_SYSTEM:
+		auth_alg = WLAN_AUTH_OPEN;
+		break;
+	case NL80211_AUTHTYPE_SHARED_KEY:
+		if (IS_ERR(local->wep_tx_tfm))
+			return -EOPNOTSUPP;
+		auth_alg = WLAN_AUTH_SHARED_KEY;
+		break;
+	case NL80211_AUTHTYPE_FT:
+		auth_alg = WLAN_AUTH_FT;
+		break;
+	case NL80211_AUTHTYPE_NETWORK_EAP:
+		auth_alg = WLAN_AUTH_LEAP;
+		break;
+	case NL80211_AUTHTYPE_SAE:
+		auth_alg = WLAN_AUTH_SAE;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
+			    req->ie_len, GFP_KERNEL);
+	if (!auth_data)
+		return -ENOMEM;
+
+	auth_data->bss = req->bss;
+
+	if (req->sae_data_len >= 4) {
+		__le16 *pos = (__le16 *) req->sae_data;
+		auth_data->sae_trans = le16_to_cpu(pos[0]);
+		auth_data->sae_status = le16_to_cpu(pos[1]);
+		memcpy(auth_data->data, req->sae_data + 4,
+		       req->sae_data_len - 4);
+		auth_data->data_len += req->sae_data_len - 4;
+	}
+
+	if (req->ie && req->ie_len) {
+		memcpy(&auth_data->data[auth_data->data_len],
+		       req->ie, req->ie_len);
+		auth_data->data_len += req->ie_len;
+	}
+
+	if (req->key && req->key_len) {
+		auth_data->key_len = req->key_len;
+		auth_data->key_idx = req->key_idx;
+		memcpy(auth_data->key, req->key, req->key_len);
+	}
+
+	auth_data->algorithm = auth_alg;
+
+	/* try to authenticate/probe */
+
+	mutex_lock(&ifmgd->mtx);
+
+	if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
+	    ifmgd->assoc_data) {
+		err = -EBUSY;
+		goto err_free;
+	}
+
+	if (ifmgd->auth_data)
+		ieee80211_destroy_auth_data(sdata, false);
+
+	/* prep auth_data so we don't go into idle on disassoc */
+	ifmgd->auth_data = auth_data;
+
+	if (ifmgd->associated) {
+		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       WLAN_REASON_UNSPECIFIED,
+				       false, frame_buf);
+
+		__cfg80211_send_deauth(sdata->dev, frame_buf,
+				       sizeof(frame_buf));
+	}
+
+	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
+
+	err = ieee80211_prep_connection(sdata, req->bss, false);
+	if (err)
+		goto err_clear;
+
+	err = ieee80211_probe_auth(sdata);
+	if (err) {
+		sta_info_destroy_addr(sdata, req->bss->bssid);
+		goto err_clear;
+	}
+
+	/* hold our own reference */
+	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
+	err = 0;
+	goto out_unlock;
+
+ err_clear:
+	memset(ifmgd->bssid, 0, ETH_ALEN);
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+	ifmgd->auth_data = NULL;
+ err_free:
+	kfree(auth_data);
+ out_unlock:
+	mutex_unlock(&ifmgd->mtx);
+
+	return err;
+}
+
+int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
+			struct cfg80211_assoc_request *req)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_bss *bss = (void *)req->bss->priv;
+	struct ieee80211_mgd_assoc_data *assoc_data;
+	const struct cfg80211_bss_ies *beacon_ies;
+	struct ieee80211_supported_band *sband;
+	const u8 *ssidie, *ht_ie, *vht_ie;
+	int i, err;
+
+	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
+	if (!assoc_data)
+		return -ENOMEM;
+
+	rcu_read_lock();
+	ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
+	if (!ssidie) {
+		rcu_read_unlock();
+		kfree(assoc_data);
+		return -EINVAL;
+	}
+	memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
+	assoc_data->ssid_len = ssidie[1];
+	rcu_read_unlock();
+
+	mutex_lock(&ifmgd->mtx);
+
+	if (ifmgd->associated) {
+		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       WLAN_REASON_UNSPECIFIED,
+				       false, frame_buf);
+
+		__cfg80211_send_deauth(sdata->dev, frame_buf,
+				       sizeof(frame_buf));
+	}
+
+	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
+		err = -EBUSY;
+		goto err_free;
+	}
+
+	if (ifmgd->assoc_data) {
+		err = -EBUSY;
+		goto err_free;
+	}
+
+	if (ifmgd->auth_data) {
+		bool match;
+
+		/* keep sta info, bssid if matching */
+		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
+		ieee80211_destroy_auth_data(sdata, match);
+	}
+
+	/* prepare assoc data */
+	
+	ifmgd->beacon_crc_valid = false;
+
+	/*
+	 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
+	 * We still associate in non-HT mode (11a/b/g) if any one of these
+	 * ciphers is configured as pairwise.
+	 * We can set this to true for non-11n hardware, that'll be checked
+	 * separately along with the peer capabilities.
+	 */
+	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
+		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
+		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
+		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
+			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+			netdev_info(sdata->dev,
+				    "disabling HT/VHT due to WEP/TKIP use\n");
+		}
+	}
+
+	if (req->flags & ASSOC_REQ_DISABLE_HT) {
+		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+	}
+
+	if (req->flags & ASSOC_REQ_DISABLE_VHT)
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+
+	/* Also disable HT if we don't support it or the AP doesn't use WMM */
+	sband = local->hw.wiphy->bands[req->bss->channel->band];
+	if (!sband->ht_cap.ht_supported ||
+	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
+		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+		if (!bss->wmm_used)
+			netdev_info(sdata->dev,
+				    "disabling HT as WMM/QoS is not supported by the AP\n");
+	}
+
+	/* disable VHT if we don't support it or the AP doesn't use WMM */
+	if (!sband->vht_cap.vht_supported ||
+	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+		if (!bss->wmm_used)
+			netdev_info(sdata->dev,
+				    "disabling VHT as WMM/QoS is not supported by the AP\n");
+	}
+
+	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
+	memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
+	       sizeof(ifmgd->ht_capa_mask));
+
+	memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
+	memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
+	       sizeof(ifmgd->vht_capa_mask));
+
+	if (req->ie && req->ie_len) {
+		memcpy(assoc_data->ie, req->ie, req->ie_len);
+		assoc_data->ie_len = req->ie_len;
+	}
+
+	assoc_data->bss = req->bss;
+
+	if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
+		if (ifmgd->powersave)
+			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
+		else
+			sdata->smps_mode = IEEE80211_SMPS_OFF;
+	} else
+		sdata->smps_mode = ifmgd->req_smps;
+
+	assoc_data->capability = req->bss->capability;
+	assoc_data->wmm = bss->wmm_used &&
+			  (local->hw.queues >= IEEE80211_NUM_ACS);
+	assoc_data->supp_rates = bss->supp_rates;
+	assoc_data->supp_rates_len = bss->supp_rates_len;
+
+	rcu_read_lock();
+	ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
+	if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
+		assoc_data->ap_ht_param =
+			((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
+	else
+		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+	vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
+	if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
+		memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
+		       sizeof(struct ieee80211_vht_cap));
+	else
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+	rcu_read_unlock();
+
+	if (bss->wmm_used && bss->uapsd_supported &&
+	    (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
+	    sdata->wmm_acm != 0xff) {
+		assoc_data->uapsd = true;
+		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
+	} else {
+		assoc_data->uapsd = false;
+		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
+	}
+
+	if (req->prev_bssid)
+		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
+
+	if (req->use_mfp) {
+		ifmgd->mfp = IEEE80211_MFP_REQUIRED;
+		ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
+	} else {
+		ifmgd->mfp = IEEE80211_MFP_DISABLED;
+		ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
+	}
+
+	if (req->crypto.control_port)
+		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
+	else
+		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
+
+	sdata->control_port_protocol = req->crypto.control_port_ethertype;
+	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
+
+	/* kick off associate process */
+
+	ifmgd->assoc_data = assoc_data;
+	ifmgd->dtim_period = 0;
+
+	err = ieee80211_prep_connection(sdata, req->bss, true);
+	if (err)
+		goto err_clear;
+
+	rcu_read_lock();
+	beacon_ies = rcu_dereference(req->bss->beacon_ies);
+
+	if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
+	    !beacon_ies) {
+		/*
+		 * Wait up to one beacon interval ...
+		 * should this be more if we miss one?
+		 */
+		sdata_info(sdata, "waiting for beacon from %pM\n",
+			   ifmgd->bssid);
+		assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
+		assoc_data->timeout_started = true;
+		assoc_data->need_beacon = true;
+	} else if (beacon_ies) {
+		const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
+						    beacon_ies->data,
+						    beacon_ies->len);
+		u8 dtim_count = 0;
+
+		if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
+			const struct ieee80211_tim_ie *tim;
+			tim = (void *)(tim_ie + 2);
+			ifmgd->dtim_period = tim->dtim_period;
+			dtim_count = tim->dtim_count;
+		}
+		assoc_data->have_beacon = true;
+		assoc_data->timeout = jiffies;
+		assoc_data->timeout_started = true;
+
+		if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
+			sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
+			sdata->vif.bss_conf.sync_device_ts =
+				bss->device_ts_beacon;
+			sdata->vif.bss_conf.sync_dtim_count = dtim_count;
+		}
+	} else {
+		assoc_data->timeout = jiffies;
+		assoc_data->timeout_started = true;
+	}
+	rcu_read_unlock();
+
+	run_again(ifmgd, assoc_data->timeout);
+
+	if (bss->corrupt_data) {
+		char *corrupt_type = "data";
+		if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
+			if (bss->corrupt_data &
+					IEEE80211_BSS_CORRUPT_PROBE_RESP)
+				corrupt_type = "beacon and probe response";
+			else
+				corrupt_type = "beacon";
+		} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
+			corrupt_type = "probe response";
+		sdata_info(sdata, "associating with AP with corrupt %s\n",
+			   corrupt_type);
+	}
+
+	err = 0;
+	goto out;
+ err_clear:
+	memset(ifmgd->bssid, 0, ETH_ALEN);
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+	ifmgd->assoc_data = NULL;
+ err_free:
+	kfree(assoc_data);
+ out:
+	mutex_unlock(&ifmgd->mtx);
+
+	return err;
+}
+
+int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
+			 struct cfg80211_deauth_request *req)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+	bool tx = !req->local_state_change;
+	bool report_frame = false;
+
+	mutex_lock(&ifmgd->mtx);
+
+	sdata_info(sdata,
+		   "deauthenticating from %pM by local choice (reason=%d)\n",
+		   req->bssid, req->reason_code);
+
+	if (ifmgd->auth_data) {
+		drv_mgd_prepare_tx(sdata->local, sdata);
+		ieee80211_send_deauth_disassoc(sdata, req->bssid,
+					       IEEE80211_STYPE_DEAUTH,
+					       req->reason_code, tx,
+					       frame_buf);
+		ieee80211_destroy_auth_data(sdata, false);
+		mutex_unlock(&ifmgd->mtx);
+
+		report_frame = true;
+		goto out;
+	}
+
+	if (ifmgd->associated &&
+	    ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       req->reason_code, tx, frame_buf);
+		report_frame = true;
+	}
+	mutex_unlock(&ifmgd->mtx);
+
+ out:
+	if (report_frame)
+		__cfg80211_send_deauth(sdata->dev, frame_buf,
+				       IEEE80211_DEAUTH_FRAME_LEN);
+
+	return 0;
+}
+
+int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
+			   struct cfg80211_disassoc_request *req)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 bssid[ETH_ALEN];
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	mutex_lock(&ifmgd->mtx);
+
+	/*
+	 * cfg80211 should catch this ... but it's racy since
+	 * we can receive a disassoc frame, process it, hand it
+	 * to cfg80211 while that's in a locked section already
+	 * trying to tell us that the user wants to disconnect.
+	 */
+	if (ifmgd->associated != req->bss) {
+		mutex_unlock(&ifmgd->mtx);
+		return -ENOLINK;
+	}
+
+	sdata_info(sdata,
+		   "disassociating from %pM by local choice (reason=%d)\n",
+		   req->bss->bssid, req->reason_code);
+
+	memcpy(bssid, req->bss->bssid, ETH_ALEN);
+	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
+			       req->reason_code, !req->local_state_change,
+			       frame_buf);
+	mutex_unlock(&ifmgd->mtx);
+
+	__cfg80211_send_disassoc(sdata->dev, frame_buf,
+				 IEEE80211_DEAUTH_FRAME_LEN);
+
+	return 0;
+}
+
+void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	/*
+	 * Make sure some work items will not run after this,
+	 * they will not do anything but might not have been
+	 * cancelled when disconnecting.
+	 */
+	cancel_work_sync(&ifmgd->monitor_work);
+	cancel_work_sync(&ifmgd->beacon_connection_loss_work);
+	cancel_work_sync(&ifmgd->request_smps_work);
+	cancel_work_sync(&ifmgd->csa_connection_drop_work);
+	cancel_work_sync(&ifmgd->chswitch_work);
+
+	mutex_lock(&ifmgd->mtx);
+	if (ifmgd->assoc_data)
+		ieee80211_destroy_assoc_data(sdata, false);
+	if (ifmgd->auth_data)
+		ieee80211_destroy_auth_data(sdata, false);
+	del_timer_sync(&ifmgd->timer);
+	mutex_unlock(&ifmgd->mtx);
+}
+
+void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
+			       enum nl80211_cqm_rssi_threshold_event rssi_event,
+			       gfp_t gfp)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	trace_api_cqm_rssi_notify(sdata, rssi_event);
+
+	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
+}
+EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
new file mode 100644
index 0000000..acd1f71
--- /dev/null
+++ b/net/mac80211/offchannel.c
@@ -0,0 +1,484 @@
+/*
+ * Off-channel operation helpers
+ *
+ * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+
+/*
+ * Tell our hardware to disable PS.
+ * Optionally inform AP that we will go to sleep so that it will buffer
+ * the frames while we are doing off-channel work.  This is optional
+ * because we *may* be doing work on-operating channel, and want our
+ * hardware unconditionally awake, but still let the AP send us normal frames.
+ */
+static void ieee80211_offchannel_ps_enable(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	local->offchannel_ps_enabled = false;
+
+	/* FIXME: what to do when local->pspolling is true? */
+
+	del_timer_sync(&local->dynamic_ps_timer);
+	del_timer_sync(&ifmgd->bcn_mon_timer);
+	del_timer_sync(&ifmgd->conn_mon_timer);
+
+	cancel_work_sync(&local->dynamic_ps_enable_work);
+
+	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+		local->offchannel_ps_enabled = true;
+		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+
+	if (!local->offchannel_ps_enabled ||
+	    !(local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK))
+		/*
+		 * If power save was enabled, no need to send a nullfunc
+		 * frame because AP knows that we are sleeping. But if the
+		 * hardware is creating the nullfunc frame for power save
+		 * status (ie. IEEE80211_HW_PS_NULLFUNC_STACK is not
+		 * enabled) and power save was enabled, the firmware just
+		 * sent a null frame with power save disabled. So we need
+		 * to send a new nullfunc frame to inform the AP that we
+		 * are again sleeping.
+		 */
+		ieee80211_send_nullfunc(local, sdata, 1);
+}
+
+/* inform AP that we are awake again, unless power save is enabled */
+static void ieee80211_offchannel_ps_disable(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	if (!local->ps_sdata)
+		ieee80211_send_nullfunc(local, sdata, 0);
+	else if (local->offchannel_ps_enabled) {
+		/*
+		 * In !IEEE80211_HW_PS_NULLFUNC_STACK case the hardware
+		 * will send a nullfunc frame with the powersave bit set
+		 * even though the AP already knows that we are sleeping.
+		 * This could be avoided by sending a null frame with power
+		 * save bit disabled before enabling the power save, but
+		 * this doesn't gain anything.
+		 *
+		 * When IEEE80211_HW_PS_NULLFUNC_STACK is enabled, no need
+		 * to send a nullfunc frame because AP already knows that
+		 * we are sleeping, let's just enable power save mode in
+		 * hardware.
+		 */
+		/* TODO:  Only set hardware if CONF_PS changed?
+		 * TODO:  Should we set offchannel_ps_enabled to false?
+		 */
+		local->hw.conf.flags |= IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	} else if (local->hw.conf.dynamic_ps_timeout > 0) {
+		/*
+		 * If IEEE80211_CONF_PS was not set and the dynamic_ps_timer
+		 * had been running before leaving the operating channel,
+		 * restart the timer now and send a nullfunc frame to inform
+		 * the AP that we are awake.
+		 */
+		ieee80211_send_nullfunc(local, sdata, 0);
+		mod_timer(&local->dynamic_ps_timer, jiffies +
+			  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
+	}
+
+	ieee80211_sta_reset_beacon_monitor(sdata);
+	ieee80211_sta_reset_conn_monitor(sdata);
+}
+
+void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	if (WARN_ON(local->use_chanctx))
+		return;
+
+	/*
+	 * notify the AP about us leaving the channel and stop all
+	 * STA interfaces.
+	 */
+
+	/*
+	 * Stop queues and transmit all frames queued by the driver
+	 * before sending nullfunc to enable powersave at the AP.
+	 */
+	ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL);
+	ieee80211_flush_queues(local, NULL);
+
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
+			continue;
+
+		if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
+			set_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
+
+		/* Check to see if we should disable beaconing. */
+		if (sdata->vif.bss_conf.enable_beacon) {
+			set_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
+				&sdata->state);
+			sdata->vif.bss_conf.enable_beacon = false;
+			ieee80211_bss_info_change_notify(
+				sdata, BSS_CHANGED_BEACON_ENABLED);
+		}
+
+		if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+		    sdata->u.mgd.associated)
+			ieee80211_offchannel_ps_enable(sdata);
+	}
+	mutex_unlock(&local->iflist_mtx);
+}
+
+void ieee80211_offchannel_return(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	if (WARN_ON(local->use_chanctx))
+		return;
+
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
+			continue;
+
+		if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
+			clear_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
+
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		/* Tell AP we're back */
+		if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+		    sdata->u.mgd.associated)
+			ieee80211_offchannel_ps_disable(sdata);
+
+		if (test_and_clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
+				       &sdata->state)) {
+			sdata->vif.bss_conf.enable_beacon = true;
+			ieee80211_bss_info_change_notify(
+				sdata, BSS_CHANGED_BEACON_ENABLED);
+		}
+	}
+	mutex_unlock(&local->iflist_mtx);
+
+	ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL);
+}
+
+void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc)
+{
+	if (roc->notified)
+		return;
+
+	if (roc->mgmt_tx_cookie) {
+		if (!WARN_ON(!roc->frame)) {
+			ieee80211_tx_skb_tid_band(roc->sdata, roc->frame, 7,
+						  roc->chan->band);
+			roc->frame = NULL;
+		}
+	} else {
+		cfg80211_ready_on_channel(&roc->sdata->wdev, roc->cookie,
+					  roc->chan, roc->req_duration,
+					  GFP_KERNEL);
+	}
+
+	roc->notified = true;
+}
+
+static void ieee80211_hw_roc_start(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, hw_roc_start);
+	struct ieee80211_roc_work *roc, *dep, *tmp;
+
+	mutex_lock(&local->mtx);
+
+	if (list_empty(&local->roc_list))
+		goto out_unlock;
+
+	roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
+			       list);
+
+	if (!roc->started)
+		goto out_unlock;
+
+	roc->hw_begun = true;
+	roc->hw_start_time = local->hw_roc_start_time;
+
+	ieee80211_handle_roc_started(roc);
+	list_for_each_entry_safe(dep, tmp, &roc->dependents, list) {
+		ieee80211_handle_roc_started(dep);
+
+		if (dep->duration > roc->duration) {
+			u32 dur = dep->duration;
+			dep->duration = dur - roc->duration;
+			roc->duration = dur;
+			list_move(&dep->list, &roc->list);
+		}
+	}
+ out_unlock:
+	mutex_unlock(&local->mtx);
+}
+
+void ieee80211_ready_on_channel(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	local->hw_roc_start_time = jiffies;
+
+	trace_api_ready_on_channel(local);
+
+	ieee80211_queue_work(hw, &local->hw_roc_start);
+}
+EXPORT_SYMBOL_GPL(ieee80211_ready_on_channel);
+
+void ieee80211_start_next_roc(struct ieee80211_local *local)
+{
+	struct ieee80211_roc_work *roc;
+
+	lockdep_assert_held(&local->mtx);
+
+	if (list_empty(&local->roc_list)) {
+		ieee80211_run_deferred_scan(local);
+		return;
+	}
+
+	roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
+			       list);
+
+	if (WARN_ON_ONCE(roc->started))
+		return;
+
+	if (local->ops->remain_on_channel) {
+		int ret, duration = roc->duration;
+
+		/* XXX: duplicated, see ieee80211_start_roc_work() */
+		if (!duration)
+			duration = 10;
+
+		ret = drv_remain_on_channel(local, roc->sdata, roc->chan,
+					    duration, roc->type);
+
+		roc->started = true;
+
+		if (ret) {
+			wiphy_warn(local->hw.wiphy,
+				   "failed to start next HW ROC (%d)\n", ret);
+			/*
+			 * queue the work struct again to avoid recursion
+			 * when multiple failures occur
+			 */
+			ieee80211_remain_on_channel_expired(&local->hw);
+		}
+	} else {
+		/* delay it a bit */
+		ieee80211_queue_delayed_work(&local->hw, &roc->work,
+					     round_jiffies_relative(HZ/2));
+	}
+}
+
+void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free)
+{
+	struct ieee80211_roc_work *dep, *tmp;
+
+	if (WARN_ON(roc->to_be_freed))
+		return;
+
+	/* was never transmitted */
+	if (roc->frame) {
+		cfg80211_mgmt_tx_status(&roc->sdata->wdev,
+					(unsigned long)roc->frame,
+					roc->frame->data, roc->frame->len,
+					false, GFP_KERNEL);
+		kfree_skb(roc->frame);
+	}
+
+	if (!roc->mgmt_tx_cookie)
+		cfg80211_remain_on_channel_expired(&roc->sdata->wdev,
+						   roc->cookie, roc->chan,
+						   GFP_KERNEL);
+
+	list_for_each_entry_safe(dep, tmp, &roc->dependents, list)
+		ieee80211_roc_notify_destroy(dep, true);
+
+	if (free)
+		kfree(roc);
+	else
+		roc->to_be_freed = true;
+}
+
+void ieee80211_sw_roc_work(struct work_struct *work)
+{
+	struct ieee80211_roc_work *roc =
+		container_of(work, struct ieee80211_roc_work, work.work);
+	struct ieee80211_sub_if_data *sdata = roc->sdata;
+	struct ieee80211_local *local = sdata->local;
+	bool started;
+
+	mutex_lock(&local->mtx);
+
+	if (roc->to_be_freed)
+		goto out_unlock;
+
+	if (roc->abort)
+		goto finish;
+
+	if (WARN_ON(list_empty(&local->roc_list)))
+		goto out_unlock;
+
+	if (WARN_ON(roc != list_first_entry(&local->roc_list,
+					    struct ieee80211_roc_work,
+					    list)))
+		goto out_unlock;
+
+	if (!roc->started) {
+		struct ieee80211_roc_work *dep;
+
+		/* start this ROC */
+
+		/* switch channel etc */
+		ieee80211_recalc_idle(local);
+
+		local->tmp_channel = roc->chan;
+		ieee80211_hw_config(local, 0);
+
+		/* tell userspace or send frame */
+		ieee80211_handle_roc_started(roc);
+		list_for_each_entry(dep, &roc->dependents, list)
+			ieee80211_handle_roc_started(dep);
+
+		/* if it was pure TX, just finish right away */
+		if (!roc->duration)
+			goto finish;
+
+		roc->started = true;
+		ieee80211_queue_delayed_work(&local->hw, &roc->work,
+					     msecs_to_jiffies(roc->duration));
+	} else {
+		/* finish this ROC */
+ finish:
+		list_del(&roc->list);
+		started = roc->started;
+		ieee80211_roc_notify_destroy(roc, !roc->abort);
+
+		if (started) {
+			ieee80211_flush_queues(local, NULL);
+
+			local->tmp_channel = NULL;
+			ieee80211_hw_config(local, 0);
+
+			ieee80211_offchannel_return(local);
+		}
+
+		ieee80211_recalc_idle(local);
+
+		if (started)
+			ieee80211_start_next_roc(local);
+	}
+
+ out_unlock:
+	mutex_unlock(&local->mtx);
+}
+
+static void ieee80211_hw_roc_done(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, hw_roc_done);
+	struct ieee80211_roc_work *roc;
+
+	mutex_lock(&local->mtx);
+
+	if (list_empty(&local->roc_list))
+		goto out_unlock;
+
+	roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
+			       list);
+
+	if (!roc->started)
+		goto out_unlock;
+
+	list_del(&roc->list);
+
+	ieee80211_roc_notify_destroy(roc, true);
+
+	/* if there's another roc, start it now */
+	ieee80211_start_next_roc(local);
+
+ out_unlock:
+	mutex_unlock(&local->mtx);
+}
+
+void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_remain_on_channel_expired(local);
+
+	ieee80211_queue_work(hw, &local->hw_roc_done);
+}
+EXPORT_SYMBOL_GPL(ieee80211_remain_on_channel_expired);
+
+void ieee80211_roc_setup(struct ieee80211_local *local)
+{
+	INIT_WORK(&local->hw_roc_start, ieee80211_hw_roc_start);
+	INIT_WORK(&local->hw_roc_done, ieee80211_hw_roc_done);
+	INIT_LIST_HEAD(&local->roc_list);
+}
+
+void ieee80211_roc_purge(struct ieee80211_local *local,
+			 struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_roc_work *roc, *tmp;
+	LIST_HEAD(tmp_list);
+
+	mutex_lock(&local->mtx);
+	list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
+		if (sdata && roc->sdata != sdata)
+			continue;
+
+		if (roc->started && local->ops->remain_on_channel) {
+			/* can race, so ignore return value */
+			drv_cancel_remain_on_channel(local);
+		}
+
+		list_move_tail(&roc->list, &tmp_list);
+		roc->abort = true;
+	}
+	mutex_unlock(&local->mtx);
+
+	list_for_each_entry_safe(roc, tmp, &tmp_list, list) {
+		if (local->ops->remain_on_channel) {
+			list_del(&roc->list);
+			ieee80211_roc_notify_destroy(roc, true);
+		} else {
+			ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
+
+			/* work will clean up etc */
+			flush_delayed_work(&roc->work);
+			WARN_ON(!roc->to_be_freed);
+			kfree(roc);
+		}
+	}
+
+	WARN_ON_ONCE(!list_empty(&tmp_list));
+}
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
new file mode 100644
index 0000000..3401262
--- /dev/null
+++ b/net/mac80211/pm.c
@@ -0,0 +1,145 @@
+#include <net/mac80211.h>
+#include <net/rtnetlink.h>
+
+#include "ieee80211_i.h"
+#include "mesh.h"
+#include "driver-ops.h"
+#include "led.h"
+
+int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+
+	if (!local->open_count)
+		goto suspend;
+
+	ieee80211_scan_cancel(local);
+
+	ieee80211_dfs_cac_cancel(local);
+
+	ieee80211_roc_purge(local, NULL);
+
+	ieee80211_del_virtual_monitor(local);
+
+	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+		mutex_lock(&local->sta_mtx);
+		list_for_each_entry(sta, &local->sta_list, list) {
+			set_sta_flag(sta, WLAN_STA_BLOCK_BA);
+			ieee80211_sta_tear_down_BA_sessions(
+					sta, AGG_STOP_LOCAL_REQUEST);
+		}
+		mutex_unlock(&local->sta_mtx);
+	}
+
+	ieee80211_stop_queues_by_reason(hw,
+					IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_SUSPEND);
+
+	/* flush out all packets and station cleanup call_rcu()s */
+	synchronize_net();
+	rcu_barrier();
+
+	ieee80211_flush_queues(local, NULL);
+
+	local->quiescing = true;
+	/* make quiescing visible to timers everywhere */
+	mb();
+
+	flush_workqueue(local->workqueue);
+
+	/* Don't try to run timers while suspended. */
+	del_timer_sync(&local->sta_cleanup);
+
+	 /*
+	 * Note that this particular timer doesn't need to be
+	 * restarted at resume.
+	 */
+	cancel_work_sync(&local->dynamic_ps_enable_work);
+	del_timer_sync(&local->dynamic_ps_timer);
+
+	local->wowlan = wowlan && local->open_count;
+	if (local->wowlan) {
+		int err = drv_suspend(local, wowlan);
+		if (err < 0) {
+			local->quiescing = false;
+			local->wowlan = false;
+			if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+				mutex_lock(&local->sta_mtx);
+				list_for_each_entry(sta,
+						    &local->sta_list, list) {
+					clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
+				}
+				mutex_unlock(&local->sta_mtx);
+			}
+			ieee80211_wake_queues_by_reason(hw,
+					IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_SUSPEND);
+			return err;
+		} else if (err > 0) {
+			WARN_ON(err != 1);
+			return err;
+		} else {
+			goto suspend;
+		}
+	}
+
+	/* tear down aggregation sessions and remove STAs */
+	mutex_lock(&local->sta_mtx);
+	list_for_each_entry(sta, &local->sta_list, list) {
+		if (sta->uploaded) {
+			enum ieee80211_sta_state state;
+
+			state = sta->sta_state;
+			for (; state > IEEE80211_STA_NOTEXIST; state--)
+				WARN_ON(drv_sta_state(local, sta->sdata, sta,
+						      state, state - 1));
+		}
+	}
+	mutex_unlock(&local->sta_mtx);
+
+	/* remove all interfaces that were created in the driver */
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata) ||
+		    sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+		    sdata->vif.type == NL80211_IFTYPE_MONITOR)
+			continue;
+
+		drv_remove_interface(local, sdata);
+	}
+
+	/*
+	 * We disconnected on all interfaces before suspend, all channel
+	 * contexts should be released.
+	 */
+	WARN_ON(!list_empty(&local->chanctx_list));
+
+	/* stop hardware - this must stop RX */
+	if (local->open_count)
+		ieee80211_stop_device(local);
+
+ suspend:
+	local->suspended = true;
+	/* need suspended to be visible before quiescing is false */
+	barrier();
+	local->quiescing = false;
+
+	return 0;
+}
+
+/*
+ * __ieee80211_resume() is a static inline which just calls
+ * ieee80211_reconfig(), which is also needed for hardware
+ * hang/firmware failure/etc. recovery.
+ */
+
+void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
+				    struct cfg80211_wowlan_wakeup *wakeup,
+				    gfp_t gfp)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
+}
+EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
new file mode 100644
index 0000000..ab000ff
--- /dev/null
+++ b/net/mac80211/rate.c
@@ -0,0 +1,752 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/rtnetlink.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include "rate.h"
+#include "ieee80211_i.h"
+#include "debugfs.h"
+
+struct rate_control_alg {
+	struct list_head list;
+	struct rate_control_ops *ops;
+};
+
+static LIST_HEAD(rate_ctrl_algs);
+static DEFINE_MUTEX(rate_ctrl_mutex);
+
+static char *ieee80211_default_rc_algo = CPTCFG_MAC80211_RC_DEFAULT;
+module_param(ieee80211_default_rc_algo, charp, 0644);
+MODULE_PARM_DESC(ieee80211_default_rc_algo,
+		 "Default rate control algorithm for mac80211 to use");
+
+int ieee80211_rate_control_register(struct rate_control_ops *ops)
+{
+	struct rate_control_alg *alg;
+
+	if (!ops->name)
+		return -EINVAL;
+
+	mutex_lock(&rate_ctrl_mutex);
+	list_for_each_entry(alg, &rate_ctrl_algs, list) {
+		if (!strcmp(alg->ops->name, ops->name)) {
+			/* don't register an algorithm twice */
+			WARN_ON(1);
+			mutex_unlock(&rate_ctrl_mutex);
+			return -EALREADY;
+		}
+	}
+
+	alg = kzalloc(sizeof(*alg), GFP_KERNEL);
+	if (alg == NULL) {
+		mutex_unlock(&rate_ctrl_mutex);
+		return -ENOMEM;
+	}
+	alg->ops = ops;
+
+	list_add_tail(&alg->list, &rate_ctrl_algs);
+	mutex_unlock(&rate_ctrl_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL(ieee80211_rate_control_register);
+
+void ieee80211_rate_control_unregister(struct rate_control_ops *ops)
+{
+	struct rate_control_alg *alg;
+
+	mutex_lock(&rate_ctrl_mutex);
+	list_for_each_entry(alg, &rate_ctrl_algs, list) {
+		if (alg->ops == ops) {
+			list_del(&alg->list);
+			kfree(alg);
+			break;
+		}
+	}
+	mutex_unlock(&rate_ctrl_mutex);
+}
+EXPORT_SYMBOL(ieee80211_rate_control_unregister);
+
+static struct rate_control_ops *
+ieee80211_try_rate_control_ops_get(const char *name)
+{
+	struct rate_control_alg *alg;
+	struct rate_control_ops *ops = NULL;
+
+	if (!name)
+		return NULL;
+
+	mutex_lock(&rate_ctrl_mutex);
+	list_for_each_entry(alg, &rate_ctrl_algs, list) {
+		if (!strcmp(alg->ops->name, name))
+			if (try_module_get(alg->ops->module)) {
+				ops = alg->ops;
+				break;
+			}
+	}
+	mutex_unlock(&rate_ctrl_mutex);
+	return ops;
+}
+
+/* Get the rate control algorithm. */
+static struct rate_control_ops *
+ieee80211_rate_control_ops_get(const char *name)
+{
+	struct rate_control_ops *ops;
+	const char *alg_name;
+
+	kparam_block_sysfs_write(ieee80211_default_rc_algo);
+	if (!name)
+		alg_name = ieee80211_default_rc_algo;
+	else
+		alg_name = name;
+
+	ops = ieee80211_try_rate_control_ops_get(alg_name);
+	if (!ops) {
+		request_module("rc80211_%s", alg_name);
+		ops = ieee80211_try_rate_control_ops_get(alg_name);
+	}
+	if (!ops && name)
+		/* try default if specific alg requested but not found */
+		ops = ieee80211_try_rate_control_ops_get(ieee80211_default_rc_algo);
+
+	/* try built-in one if specific alg requested but not found */
+	if (!ops && strlen(CPTCFG_MAC80211_RC_DEFAULT))
+		ops = ieee80211_try_rate_control_ops_get(CPTCFG_MAC80211_RC_DEFAULT);
+	kparam_unblock_sysfs_write(ieee80211_default_rc_algo);
+
+	return ops;
+}
+
+static void ieee80211_rate_control_ops_put(struct rate_control_ops *ops)
+{
+	module_put(ops->module);
+}
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+static ssize_t rcname_read(struct file *file, char __user *userbuf,
+			   size_t count, loff_t *ppos)
+{
+	struct rate_control_ref *ref = file->private_data;
+	int len = strlen(ref->ops->name);
+
+	return simple_read_from_buffer(userbuf, count, ppos,
+				       ref->ops->name, len);
+}
+
+static const struct file_operations rcname_ops = {
+	.read = rcname_read,
+	.open = simple_open,
+	.llseek = default_llseek,
+};
+#endif
+
+static struct rate_control_ref *rate_control_alloc(const char *name,
+					    struct ieee80211_local *local)
+{
+	struct dentry *debugfsdir = NULL;
+	struct rate_control_ref *ref;
+
+	ref = kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL);
+	if (!ref)
+		goto fail_ref;
+	ref->local = local;
+	ref->ops = ieee80211_rate_control_ops_get(name);
+	if (!ref->ops)
+		goto fail_ops;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	debugfsdir = debugfs_create_dir("rc", local->hw.wiphy->debugfsdir);
+	local->debugfs.rcdir = debugfsdir;
+	debugfs_create_file("name", 0400, debugfsdir, ref, &rcname_ops);
+#endif
+
+	ref->priv = ref->ops->alloc(&local->hw, debugfsdir);
+	if (!ref->priv)
+		goto fail_priv;
+	return ref;
+
+fail_priv:
+	ieee80211_rate_control_ops_put(ref->ops);
+fail_ops:
+	kfree(ref);
+fail_ref:
+	return NULL;
+}
+
+static void rate_control_free(struct rate_control_ref *ctrl_ref)
+{
+	ctrl_ref->ops->free(ctrl_ref->priv);
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	debugfs_remove_recursive(ctrl_ref->local->debugfs.rcdir);
+	ctrl_ref->local->debugfs.rcdir = NULL;
+#endif
+
+	ieee80211_rate_control_ops_put(ctrl_ref->ops);
+	kfree(ctrl_ref);
+}
+
+static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc)
+{
+	struct sk_buff *skb = txrc->skb;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	__le16 fc;
+
+	fc = hdr->frame_control;
+
+	return (info->flags & (IEEE80211_TX_CTL_NO_ACK |
+			       IEEE80211_TX_CTL_USE_MINRATE)) ||
+		!ieee80211_is_data(fc);
+}
+
+static void rc_send_low_broadcast(s8 *idx, u32 basic_rates,
+				  struct ieee80211_supported_band *sband)
+{
+	u8 i;
+
+	if (basic_rates == 0)
+		return; /* assume basic rates unknown and accept rate */
+	if (*idx < 0)
+		return;
+	if (basic_rates & (1 << *idx))
+		return; /* selected rate is a basic rate */
+
+	for (i = *idx + 1; i <= sband->n_bitrates; i++) {
+		if (basic_rates & (1 << i)) {
+			*idx = i;
+			return;
+		}
+	}
+
+	/* could not find a basic rate; use original selection */
+}
+
+static inline s8
+rate_lowest_non_cck_index(struct ieee80211_supported_band *sband,
+			  struct ieee80211_sta *sta)
+{
+	int i;
+
+	for (i = 0; i < sband->n_bitrates; i++) {
+		struct ieee80211_rate *srate = &sband->bitrates[i];
+		if ((srate->bitrate == 10) || (srate->bitrate == 20) ||
+		    (srate->bitrate == 55) || (srate->bitrate == 110))
+			continue;
+
+		if (rate_supported(sta, sband->band, i))
+			return i;
+	}
+
+	/* No matching rate found */
+	return 0;
+}
+
+static void __rate_control_send_low(struct ieee80211_hw *hw,
+				    struct ieee80211_supported_band *sband,
+				    struct ieee80211_sta *sta,
+				    struct ieee80211_tx_info *info)
+{
+	if ((sband->band != IEEE80211_BAND_2GHZ) ||
+	    !(info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
+		info->control.rates[0].idx = rate_lowest_index(sband, sta);
+	else
+		info->control.rates[0].idx =
+			rate_lowest_non_cck_index(sband, sta);
+
+	info->control.rates[0].count =
+		(info->flags & IEEE80211_TX_CTL_NO_ACK) ?
+		1 : hw->max_rate_tries;
+
+	info->control.skip_table = 1;
+}
+
+
+bool rate_control_send_low(struct ieee80211_sta *sta,
+			   void *priv_sta,
+			   struct ieee80211_tx_rate_control *txrc)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
+	struct ieee80211_supported_band *sband = txrc->sband;
+	int mcast_rate;
+
+	if (!sta || !priv_sta || rc_no_data_or_no_ack_use_min(txrc)) {
+		__rate_control_send_low(txrc->hw, sband, sta, info);
+
+		if (!sta && txrc->bss) {
+			mcast_rate = txrc->bss_conf->mcast_rate[sband->band];
+			if (mcast_rate > 0) {
+				info->control.rates[0].idx = mcast_rate - 1;
+				return true;
+			}
+
+			rc_send_low_broadcast(&info->control.rates[0].idx,
+					      txrc->bss_conf->basic_rates,
+					      sband);
+		}
+		return true;
+	}
+	return false;
+}
+EXPORT_SYMBOL(rate_control_send_low);
+
+static bool rate_idx_match_legacy_mask(struct ieee80211_tx_rate *rate,
+				       int n_bitrates, u32 mask)
+{
+	int j;
+
+	/* See whether the selected rate or anything below it is allowed. */
+	for (j = rate->idx; j >= 0; j--) {
+		if (mask & (1 << j)) {
+			/* Okay, found a suitable rate. Use it. */
+			rate->idx = j;
+			return true;
+		}
+	}
+
+	/* Try to find a higher rate that would be allowed */
+	for (j = rate->idx + 1; j < n_bitrates; j++) {
+		if (mask & (1 << j)) {
+			/* Okay, found a suitable rate. Use it. */
+			rate->idx = j;
+			return true;
+		}
+	}
+	return false;
+}
+
+static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate,
+				    u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
+{
+	int i, j;
+	int ridx, rbit;
+
+	ridx = rate->idx / 8;
+	rbit = rate->idx % 8;
+
+	/* sanity check */
+	if (ridx < 0 || ridx >= IEEE80211_HT_MCS_MASK_LEN)
+		return false;
+
+	/* See whether the selected rate or anything below it is allowed. */
+	for (i = ridx; i >= 0; i--) {
+		for (j = rbit; j >= 0; j--)
+			if (mcs_mask[i] & BIT(j)) {
+				rate->idx = i * 8 + j;
+				return true;
+			}
+		rbit = 7;
+	}
+
+	/* Try to find a higher rate that would be allowed */
+	ridx = (rate->idx + 1) / 8;
+	rbit = (rate->idx + 1) % 8;
+
+	for (i = ridx; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
+		for (j = rbit; j < 8; j++)
+			if (mcs_mask[i] & BIT(j)) {
+				rate->idx = i * 8 + j;
+				return true;
+			}
+		rbit = 0;
+	}
+	return false;
+}
+
+
+
+static void rate_idx_match_mask(struct ieee80211_tx_rate *rate,
+				struct ieee80211_supported_band *sband,
+				enum nl80211_chan_width chan_width,
+				u32 mask,
+				u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
+{
+	struct ieee80211_tx_rate alt_rate;
+
+	/* handle HT rates */
+	if (rate->flags & IEEE80211_TX_RC_MCS) {
+		if (rate_idx_match_mcs_mask(rate, mcs_mask))
+			return;
+
+		/* also try the legacy rates. */
+		alt_rate.idx = 0;
+		/* keep protection flags */
+		alt_rate.flags = rate->flags &
+				 (IEEE80211_TX_RC_USE_RTS_CTS |
+				  IEEE80211_TX_RC_USE_CTS_PROTECT |
+				  IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
+		alt_rate.count = rate->count;
+		if (rate_idx_match_legacy_mask(&alt_rate,
+					       sband->n_bitrates, mask)) {
+			*rate = alt_rate;
+			return;
+		}
+	} else {
+		/* handle legacy rates */
+		if (rate_idx_match_legacy_mask(rate, sband->n_bitrates, mask))
+			return;
+
+		/* if HT BSS, and we handle a data frame, also try HT rates */
+		if (chan_width == NL80211_CHAN_WIDTH_20_NOHT)
+			return;
+
+		alt_rate.idx = 0;
+		/* keep protection flags */
+		alt_rate.flags = rate->flags &
+				 (IEEE80211_TX_RC_USE_RTS_CTS |
+				  IEEE80211_TX_RC_USE_CTS_PROTECT |
+				  IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
+		alt_rate.count = rate->count;
+
+		alt_rate.flags |= IEEE80211_TX_RC_MCS;
+
+		if (chan_width == NL80211_CHAN_WIDTH_40)
+			alt_rate.flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+
+		if (rate_idx_match_mcs_mask(&alt_rate, mcs_mask)) {
+			*rate = alt_rate;
+			return;
+		}
+	}
+
+	/*
+	 * Uh.. No suitable rate exists. This should not really happen with
+	 * sane TX rate mask configurations. However, should someone manage to
+	 * configure supported rates and TX rate mask in incompatible way,
+	 * allow the frame to be transmitted with whatever the rate control
+	 * selected.
+	 */
+}
+
+static void rate_fixup_ratelist(struct ieee80211_vif *vif,
+				struct ieee80211_supported_band *sband,
+				struct ieee80211_tx_info *info,
+				struct ieee80211_tx_rate *rates,
+				int max_rates)
+{
+	struct ieee80211_rate *rate;
+	bool inval = false;
+	int i;
+
+	/*
+	 * Set up the RTS/CTS rate as the fastest basic rate
+	 * that is not faster than the data rate unless there
+	 * is no basic rate slower than the data rate, in which
+	 * case we pick the slowest basic rate
+	 *
+	 * XXX: Should this check all retry rates?
+	 */
+	if (!(rates[0].flags & IEEE80211_TX_RC_MCS)) {
+		u32 basic_rates = vif->bss_conf.basic_rates;
+		s8 baserate = basic_rates ? ffs(basic_rates - 1) : 0;
+
+		rate = &sband->bitrates[rates[0].idx];
+
+		for (i = 0; i < sband->n_bitrates; i++) {
+			/* must be a basic rate */
+			if (!(basic_rates & BIT(i)))
+				continue;
+			/* must not be faster than the data rate */
+			if (sband->bitrates[i].bitrate > rate->bitrate)
+				continue;
+			/* maximum */
+			if (sband->bitrates[baserate].bitrate <
+			     sband->bitrates[i].bitrate)
+				baserate = i;
+		}
+
+		info->control.rts_cts_rate_idx = baserate;
+	}
+
+	for (i = 0; i < max_rates; i++) {
+		/*
+		 * make sure there's no valid rate following
+		 * an invalid one, just in case drivers don't
+		 * take the API seriously to stop at -1.
+		 */
+		if (inval) {
+			rates[i].idx = -1;
+			continue;
+		}
+		if (rates[i].idx < 0) {
+			inval = true;
+			continue;
+		}
+
+		/*
+		 * For now assume MCS is already set up correctly, this
+		 * needs to be fixed.
+		 */
+		if (rates[i].flags & IEEE80211_TX_RC_MCS) {
+			WARN_ON(rates[i].idx > 76);
+
+			if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
+			    info->control.use_cts_prot)
+				rates[i].flags |=
+					IEEE80211_TX_RC_USE_CTS_PROTECT;
+			continue;
+		}
+
+		if (rates[i].flags & IEEE80211_TX_RC_VHT_MCS) {
+			WARN_ON(ieee80211_rate_get_vht_mcs(&rates[i]) > 9);
+			continue;
+		}
+
+		/* set up RTS protection if desired */
+		if (info->control.use_rts) {
+			rates[i].flags |= IEEE80211_TX_RC_USE_RTS_CTS;
+			info->control.use_cts_prot = false;
+		}
+
+		/* RC is busted */
+		if (WARN_ON_ONCE(rates[i].idx >= sband->n_bitrates)) {
+			rates[i].idx = -1;
+			continue;
+		}
+
+		rate = &sband->bitrates[rates[i].idx];
+
+		/* set up short preamble */
+		if (info->control.short_preamble &&
+		    rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
+			rates[i].flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
+
+		/* set up G protection */
+		if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
+		    info->control.use_cts_prot &&
+		    rate->flags & IEEE80211_RATE_ERP_G)
+			rates[i].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
+	}
+}
+
+
+static void rate_control_fill_sta_table(struct ieee80211_sta *sta,
+					struct ieee80211_tx_info *info,
+					struct ieee80211_tx_rate *rates,
+					int max_rates)
+{
+	struct ieee80211_sta_rates *ratetbl = NULL;
+	int i;
+
+	if (sta && !info->control.skip_table)
+		ratetbl = rcu_dereference(sta->rates);
+
+	/* Fill remaining rate slots with data from the sta rate table. */
+	max_rates = min_t(int, max_rates, IEEE80211_TX_RATE_TABLE_SIZE);
+	for (i = 0; i < max_rates; i++) {
+		if (i < ARRAY_SIZE(info->control.rates) &&
+		    info->control.rates[i].idx >= 0 &&
+		    info->control.rates[i].count) {
+			if (rates != info->control.rates)
+				rates[i] = info->control.rates[i];
+		} else if (ratetbl) {
+			rates[i].idx = ratetbl->rate[i].idx;
+			rates[i].flags = ratetbl->rate[i].flags;
+			if (info->control.use_rts)
+				rates[i].count = ratetbl->rate[i].count_rts;
+			else if (info->control.use_cts_prot)
+				rates[i].count = ratetbl->rate[i].count_cts;
+			else
+				rates[i].count = ratetbl->rate[i].count;
+		} else {
+			rates[i].idx = -1;
+			rates[i].count = 0;
+		}
+
+		if (rates[i].idx < 0 || !rates[i].count)
+			break;
+	}
+}
+
+static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_sta *sta,
+				    struct ieee80211_supported_band *sband,
+				    struct ieee80211_tx_info *info,
+				    struct ieee80211_tx_rate *rates,
+				    int max_rates)
+{
+	enum nl80211_chan_width chan_width;
+	u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
+	bool has_mcs_mask;
+	u32 mask;
+	int i;
+
+	/*
+	 * Try to enforce the rateidx mask the user wanted. skip this if the
+	 * default mask (allow all rates) is used to save some processing for
+	 * the common case.
+	 */
+	mask = sdata->rc_rateidx_mask[info->band];
+	has_mcs_mask = sdata->rc_has_mcs_mask[info->band];
+	if (mask == (1 << sband->n_bitrates) - 1 && !has_mcs_mask)
+		return;
+
+	if (has_mcs_mask)
+		memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[info->band],
+		       sizeof(mcs_mask));
+	else
+		memset(mcs_mask, 0xff, sizeof(mcs_mask));
+
+	if (sta) {
+		/* Filter out rates that the STA does not support */
+		mask &= sta->supp_rates[info->band];
+		for (i = 0; i < sizeof(mcs_mask); i++)
+			mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i];
+	}
+
+	/*
+	 * Make sure the rate index selected for each TX rate is
+	 * included in the configured mask and change the rate indexes
+	 * if needed.
+	 */
+	chan_width = sdata->vif.bss_conf.chandef.width;
+	for (i = 0; i < max_rates; i++) {
+		/* Skip invalid rates */
+		if (rates[i].idx < 0)
+			break;
+
+		rate_idx_match_mask(&rates[i], sband, chan_width, mask,
+				    mcs_mask);
+	}
+}
+
+void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
+			    struct ieee80211_sta *sta,
+			    struct sk_buff *skb,
+			    struct ieee80211_tx_rate *dest,
+			    int max_rates)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_supported_band *sband;
+
+	rate_control_fill_sta_table(sta, info, dest, max_rates);
+
+	if (!vif)
+		return;
+
+	sdata = vif_to_sdata(vif);
+	sband = sdata->local->hw.wiphy->bands[info->band];
+
+	if (ieee80211_is_data(hdr->frame_control))
+		rate_control_apply_mask(sdata, sta, sband, info, dest, max_rates);
+
+	if (dest[0].idx < 0)
+		__rate_control_send_low(&sdata->local->hw, sband, sta, info);
+
+	if (sta)
+		rate_fixup_ratelist(vif, sband, info, dest, max_rates);
+}
+EXPORT_SYMBOL(ieee80211_get_tx_rates);
+
+void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
+			   struct sta_info *sta,
+			   struct ieee80211_tx_rate_control *txrc)
+{
+	struct rate_control_ref *ref = sdata->local->rate_ctrl;
+	void *priv_sta = NULL;
+	struct ieee80211_sta *ista = NULL;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
+	int i;
+
+	if (sta && test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) {
+		ista = &sta->sta;
+		priv_sta = sta->rate_ctrl_priv;
+	}
+
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+		info->control.rates[i].idx = -1;
+		info->control.rates[i].flags = 0;
+		info->control.rates[i].count = 0;
+	}
+
+	if (sdata->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
+		return;
+
+	ref->ops->get_rate(ref->priv, ista, priv_sta, txrc);
+
+	if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
+		return;
+
+	ieee80211_get_tx_rates(&sdata->vif, ista, txrc->skb,
+			       info->control.rates,
+			       ARRAY_SIZE(info->control.rates));
+}
+
+int rate_control_set_rates(struct ieee80211_hw *hw,
+			   struct ieee80211_sta *pubsta,
+			   struct ieee80211_sta_rates *rates)
+{
+	struct ieee80211_sta_rates *old;
+
+	/*
+	 * mac80211 guarantees that this function will not be called
+	 * concurrently, so the following RCU access is safe, even without
+	 * extra locking. This can not be checked easily, so we just set
+	 * the condition to true.
+	 */
+	old = rcu_dereference_protected(pubsta->rates, true);
+	rcu_assign_pointer(pubsta->rates, rates);
+	if (old)
+		kfree_rcu(old, rcu_head);
+
+	return 0;
+}
+EXPORT_SYMBOL(rate_control_set_rates);
+
+int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
+				 const char *name)
+{
+	struct rate_control_ref *ref;
+
+	ASSERT_RTNL();
+
+	if (local->open_count)
+		return -EBUSY;
+
+	if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) {
+		if (WARN_ON(!local->ops->set_rts_threshold))
+			return -EINVAL;
+		return 0;
+	}
+
+	ref = rate_control_alloc(name, local);
+	if (!ref) {
+		wiphy_warn(local->hw.wiphy,
+			   "Failed to select rate control algorithm\n");
+		return -ENOENT;
+	}
+
+	WARN_ON(local->rate_ctrl);
+	local->rate_ctrl = ref;
+
+	wiphy_debug(local->hw.wiphy, "Selected rate control algorithm '%s'\n",
+		    ref->ops->name);
+
+	return 0;
+}
+
+void rate_control_deinitialize(struct ieee80211_local *local)
+{
+	struct rate_control_ref *ref;
+
+	ref = local->rate_ctrl;
+
+	if (!ref)
+		return;
+
+	local->rate_ctrl = NULL;
+	rate_control_free(ref);
+}
+
diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h
new file mode 100644
index 0000000..910f02e
--- /dev/null
+++ b/net/mac80211/rate.h
@@ -0,0 +1,174 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef IEEE80211_RATE_H
+#define IEEE80211_RATE_H
+
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "sta_info.h"
+#include "driver-ops.h"
+
+struct rate_control_ref {
+	struct ieee80211_local *local;
+	struct rate_control_ops *ops;
+	void *priv;
+};
+
+void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
+			   struct sta_info *sta,
+			   struct ieee80211_tx_rate_control *txrc);
+
+static inline void rate_control_tx_status(struct ieee80211_local *local,
+					  struct ieee80211_supported_band *sband,
+					  struct sta_info *sta,
+					  struct sk_buff *skb)
+{
+	struct rate_control_ref *ref = local->rate_ctrl;
+	struct ieee80211_sta *ista = &sta->sta;
+	void *priv_sta = sta->rate_ctrl_priv;
+
+	if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
+		return;
+
+	ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
+}
+
+
+static inline void rate_control_rate_init(struct sta_info *sta)
+{
+	struct ieee80211_local *local = sta->sdata->local;
+	struct rate_control_ref *ref = sta->rate_ctrl;
+	struct ieee80211_sta *ista = &sta->sta;
+	void *priv_sta = sta->rate_ctrl_priv;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	if (!ref)
+		return;
+
+	rcu_read_lock();
+
+	chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		return;
+	}
+
+	sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
+	rcu_read_unlock();
+
+	ieee80211_sta_set_rx_nss(sta);
+
+	ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
+	set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
+}
+
+static inline void rate_control_rate_update(struct ieee80211_local *local,
+				    struct ieee80211_supported_band *sband,
+				    struct sta_info *sta, u32 changed)
+{
+	struct rate_control_ref *ref = local->rate_ctrl;
+	struct ieee80211_sta *ista = &sta->sta;
+	void *priv_sta = sta->rate_ctrl_priv;
+
+	if (ref && ref->ops->rate_update)
+		ref->ops->rate_update(ref->priv, sband, ista,
+				      priv_sta, changed);
+	drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
+}
+
+static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
+					   struct ieee80211_sta *sta,
+					   gfp_t gfp)
+{
+	return ref->ops->alloc_sta(ref->priv, sta, gfp);
+}
+
+static inline void rate_control_free_sta(struct sta_info *sta)
+{
+	struct rate_control_ref *ref = sta->rate_ctrl;
+	struct ieee80211_sta *ista = &sta->sta;
+	void *priv_sta = sta->rate_ctrl_priv;
+
+	ref->ops->free_sta(ref->priv, ista, priv_sta);
+}
+
+static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
+{
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct rate_control_ref *ref = sta->rate_ctrl;
+	if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
+		ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
+					  sta->debugfs.dir);
+#endif
+}
+
+static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
+{
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct rate_control_ref *ref = sta->rate_ctrl;
+	if (ref && ref->ops->remove_sta_debugfs)
+		ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
+#endif
+}
+
+/* Get a reference to the rate control algorithm. If `name' is NULL, get the
+ * first available algorithm. */
+int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
+				 const char *name);
+void rate_control_deinitialize(struct ieee80211_local *local);
+
+
+/* Rate control algorithms */
+#ifdef CPTCFG_MAC80211_RC_PID
+extern int rc80211_pid_init(void);
+extern void rc80211_pid_exit(void);
+#else
+static inline int rc80211_pid_init(void)
+{
+	return 0;
+}
+static inline void rc80211_pid_exit(void)
+{
+}
+#endif
+
+#ifdef CPTCFG_MAC80211_RC_MINSTREL
+extern int rc80211_minstrel_init(void);
+extern void rc80211_minstrel_exit(void);
+#else
+static inline int rc80211_minstrel_init(void)
+{
+	return 0;
+}
+static inline void rc80211_minstrel_exit(void)
+{
+}
+#endif
+
+#ifdef CPTCFG_MAC80211_RC_MINSTREL_HT
+extern int rc80211_minstrel_ht_init(void);
+extern void rc80211_minstrel_ht_exit(void);
+#else
+static inline int rc80211_minstrel_ht_init(void)
+{
+	return 0;
+}
+static inline void rc80211_minstrel_ht_exit(void)
+{
+}
+#endif
+
+
+#endif /* IEEE80211_RATE_H */
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
new file mode 100644
index 0000000..730658b
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel.c
@@ -0,0 +1,654 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on minstrel.c:
+ *   Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
+ *   Sponsored by Indranet Technologies Ltd
+ *
+ * Based on sample.c:
+ *   Copyright (c) 2005 John Bicket
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer,
+ *      without modification.
+ *   2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *      similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *      redistribution must be conditioned upon including a substantially
+ *      similar Disclaimer requirement for further binary redistribution.
+ *   3. Neither the names of the above-listed copyright holders nor the names
+ *      of any contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *
+ *   Alternatively, this software may be distributed under the terms of the
+ *   GNU General Public License ("GPL") version 2 as published by the Free
+ *   Software Foundation.
+ *
+ *   NO WARRANTY
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ *   THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ *   OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ *   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ *   THE POSSIBILITY OF SUCH DAMAGES.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/random.h>
+#include <linux/ieee80211.h>
+#include <linux/slab.h>
+#include <net/mac80211.h>
+#include "rate.h"
+#include "rc80211_minstrel.h"
+
+#define SAMPLE_TBL(_mi, _idx, _col) \
+		_mi->sample_table[(_idx * SAMPLE_COLUMNS) + _col]
+
+/* convert mac80211 rate index to local array index */
+static inline int
+rix_to_ndx(struct minstrel_sta_info *mi, int rix)
+{
+	int i = rix;
+	for (i = rix; i >= 0; i--)
+		if (mi->r[i].rix == rix)
+			break;
+	return i;
+}
+
+/* find & sort topmost throughput rates */
+static inline void
+minstrel_sort_best_tp_rates(struct minstrel_sta_info *mi, int i, u8 *tp_list)
+{
+	int j = MAX_THR_RATES;
+
+	while (j > 0 && mi->r[i].cur_tp > mi->r[tp_list[j - 1]].cur_tp)
+		j--;
+	if (j < MAX_THR_RATES - 1)
+		memmove(&tp_list[j + 1], &tp_list[j], MAX_THR_RATES - (j + 1));
+	if (j < MAX_THR_RATES)
+		tp_list[j] = i;
+}
+
+static void
+minstrel_set_rate(struct minstrel_sta_info *mi, struct ieee80211_sta_rates *ratetbl,
+		  int offset, int idx)
+{
+	struct minstrel_rate *r = &mi->r[idx];
+
+	ratetbl->rate[offset].idx = r->rix;
+	ratetbl->rate[offset].count = r->adjusted_retry_count;
+	ratetbl->rate[offset].count_cts = r->retry_count_cts;
+	ratetbl->rate[offset].count_rts = r->retry_count_rtscts;
+}
+
+static void
+minstrel_update_rates(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
+{
+	struct ieee80211_sta_rates *ratetbl;
+	int i = 0;
+
+	ratetbl = kzalloc(sizeof(*ratetbl), GFP_ATOMIC);
+	if (!ratetbl)
+		return;
+
+	/* Start with max_tp_rate */
+	minstrel_set_rate(mi, ratetbl, i++, mi->max_tp_rate[0]);
+
+	if (mp->hw->max_rates >= 3) {
+		/* At least 3 tx rates supported, use max_tp_rate2 next */
+		minstrel_set_rate(mi, ratetbl, i++, mi->max_tp_rate[1]);
+	}
+
+	if (mp->hw->max_rates >= 2) {
+		/* At least 2 tx rates supported, use max_prob_rate next */
+		minstrel_set_rate(mi, ratetbl, i++, mi->max_prob_rate);
+	}
+
+	/* Use lowest rate last */
+	ratetbl->rate[i].idx = mi->lowest_rix;
+	ratetbl->rate[i].count = mp->max_retry;
+	ratetbl->rate[i].count_cts = mp->max_retry;
+	ratetbl->rate[i].count_rts = mp->max_retry;
+
+	rate_control_set_rates(mp->hw, mi->sta, ratetbl);
+}
+
+static void
+minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
+{
+	u8 tmp_tp_rate[MAX_THR_RATES];
+	u8 tmp_prob_rate = 0;
+	u32 usecs;
+	int i;
+
+	for (i=0; i < MAX_THR_RATES; i++)
+	    tmp_tp_rate[i] = 0;
+
+	for (i = 0; i < mi->n_rates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+
+		usecs = mr->perfect_tx_time;
+		if (!usecs)
+			usecs = 1000000;
+
+		if (unlikely(mr->attempts > 0)) {
+			mr->sample_skipped = 0;
+			mr->cur_prob = MINSTREL_FRAC(mr->success, mr->attempts);
+			mr->succ_hist += mr->success;
+			mr->att_hist += mr->attempts;
+			mr->probability = minstrel_ewma(mr->probability,
+							mr->cur_prob,
+							EWMA_LEVEL);
+		} else
+			mr->sample_skipped++;
+
+		mr->last_success = mr->success;
+		mr->last_attempts = mr->attempts;
+		mr->success = 0;
+		mr->attempts = 0;
+
+		/* Update throughput per rate, reset thr. below 10% success */
+		if (mr->probability < MINSTREL_FRAC(10, 100))
+			mr->cur_tp = 0;
+		else
+			mr->cur_tp = mr->probability * (1000000 / usecs);
+
+		/* Sample less often below the 10% chance of success.
+		 * Sample less often above the 95% chance of success. */
+		if (mr->probability > MINSTREL_FRAC(95, 100) ||
+		    mr->probability < MINSTREL_FRAC(10, 100)) {
+			mr->adjusted_retry_count = mr->retry_count >> 1;
+			if (mr->adjusted_retry_count > 2)
+				mr->adjusted_retry_count = 2;
+			mr->sample_limit = 4;
+		} else {
+			mr->sample_limit = -1;
+			mr->adjusted_retry_count = mr->retry_count;
+		}
+		if (!mr->adjusted_retry_count)
+			mr->adjusted_retry_count = 2;
+
+		minstrel_sort_best_tp_rates(mi, i, tmp_tp_rate);
+
+		/* To determine the most robust rate (max_prob_rate) used at
+		 * 3rd mmr stage we distinct between two cases:
+		 * (1) if any success probabilitiy >= 95%, out of those rates
+		 * choose the maximum throughput rate as max_prob_rate
+		 * (2) if all success probabilities < 95%, the rate with
+		 * highest success probability is choosen as max_prob_rate */
+		if (mr->probability >= MINSTREL_FRAC(95,100)) {
+			if (mr->cur_tp >= mi->r[tmp_prob_rate].cur_tp)
+				tmp_prob_rate = i;
+		} else {
+			if (mr->probability >= mi->r[tmp_prob_rate].probability)
+				tmp_prob_rate = i;
+		}
+	}
+
+	/* Assign the new rate set */
+	memcpy(mi->max_tp_rate, tmp_tp_rate, sizeof(mi->max_tp_rate));
+	mi->max_prob_rate = tmp_prob_rate;
+
+	/* Reset update timer */
+	mi->stats_update = jiffies;
+
+	minstrel_update_rates(mp, mi);
+}
+
+static void
+minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband,
+                   struct ieee80211_sta *sta, void *priv_sta,
+		   struct sk_buff *skb)
+{
+	struct minstrel_priv *mp = priv;
+	struct minstrel_sta_info *mi = priv_sta;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_tx_rate *ar = info->status.rates;
+	int i, ndx;
+	int success;
+
+	success = !!(info->flags & IEEE80211_TX_STAT_ACK);
+
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+		if (ar[i].idx < 0)
+			break;
+
+		ndx = rix_to_ndx(mi, ar[i].idx);
+		if (ndx < 0)
+			continue;
+
+		mi->r[ndx].attempts += ar[i].count;
+
+		if ((i != IEEE80211_TX_MAX_RATES - 1) && (ar[i + 1].idx < 0))
+			mi->r[ndx].success += success;
+	}
+
+	if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) && (i >= 0))
+		mi->sample_count++;
+
+	if (mi->sample_deferred > 0)
+		mi->sample_deferred--;
+
+	if (time_after(jiffies, mi->stats_update +
+				(mp->update_interval * HZ) / 1000))
+		minstrel_update_stats(mp, mi);
+}
+
+
+static inline unsigned int
+minstrel_get_retry_count(struct minstrel_rate *mr,
+                         struct ieee80211_tx_info *info)
+{
+	unsigned int retry = mr->adjusted_retry_count;
+
+	if (info->control.use_rts)
+		retry = max(2U, min(mr->retry_count_rtscts, retry));
+	else if (info->control.use_cts_prot)
+		retry = max(2U, min(mr->retry_count_cts, retry));
+	return retry;
+}
+
+
+static int
+minstrel_get_next_sample(struct minstrel_sta_info *mi)
+{
+	unsigned int sample_ndx;
+	sample_ndx = SAMPLE_TBL(mi, mi->sample_row, mi->sample_column);
+	mi->sample_row++;
+	if ((int) mi->sample_row >= mi->n_rates) {
+		mi->sample_row = 0;
+		mi->sample_column++;
+		if (mi->sample_column >= SAMPLE_COLUMNS)
+			mi->sample_column = 0;
+	}
+	return sample_ndx;
+}
+
+static void
+minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
+		  void *priv_sta, struct ieee80211_tx_rate_control *txrc)
+{
+	struct sk_buff *skb = txrc->skb;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct minstrel_sta_info *mi = priv_sta;
+	struct minstrel_priv *mp = priv;
+	struct ieee80211_tx_rate *rate = &info->control.rates[0];
+	struct minstrel_rate *msr, *mr;
+	unsigned int ndx;
+	bool mrr_capable;
+	bool prev_sample;
+	int delta;
+	int sampling_ratio;
+
+	/* management/no-ack frames do not use rate control */
+	if (rate_control_send_low(sta, priv_sta, txrc))
+		return;
+
+	/* check multi-rate-retry capabilities & adjust lookaround_rate */
+	mrr_capable = mp->has_mrr &&
+		      !txrc->rts &&
+		      !txrc->bss_conf->use_cts_prot;
+	if (mrr_capable)
+		sampling_ratio = mp->lookaround_rate_mrr;
+	else
+		sampling_ratio = mp->lookaround_rate;
+
+	/* increase sum packet counter */
+	mi->packet_count++;
+
+	delta = (mi->packet_count * sampling_ratio / 100) -
+			(mi->sample_count + mi->sample_deferred / 2);
+
+	/* delta < 0: no sampling required */
+	prev_sample = mi->prev_sample;
+	mi->prev_sample = false;
+	if (delta < 0 || (!mrr_capable && prev_sample))
+		return;
+
+	if (mi->packet_count >= 10000) {
+		mi->sample_deferred = 0;
+		mi->sample_count = 0;
+		mi->packet_count = 0;
+	} else if (delta > mi->n_rates * 2) {
+		/* With multi-rate retry, not every planned sample
+		 * attempt actually gets used, due to the way the retry
+		 * chain is set up - [max_tp,sample,prob,lowest] for
+		 * sample_rate < max_tp.
+		 *
+		 * If there's too much sampling backlog and the link
+		 * starts getting worse, minstrel would start bursting
+		 * out lots of sampling frames, which would result
+		 * in a large throughput loss. */
+		mi->sample_count += (delta - mi->n_rates * 2);
+	}
+
+	/* get next random rate sample */
+	ndx = minstrel_get_next_sample(mi);
+	msr = &mi->r[ndx];
+	mr = &mi->r[mi->max_tp_rate[0]];
+
+	/* Decide if direct ( 1st mrr stage) or indirect (2nd mrr stage)
+	 * rate sampling method should be used.
+	 * Respect such rates that are not sampled for 20 interations.
+	 */
+	if (mrr_capable &&
+	    msr->perfect_tx_time > mr->perfect_tx_time &&
+	    msr->sample_skipped < 20) {
+		/* Only use IEEE80211_TX_CTL_RATE_CTRL_PROBE to mark
+		 * packets that have the sampling rate deferred to the
+		 * second MRR stage. Increase the sample counter only
+		 * if the deferred sample rate was actually used.
+		 * Use the sample_deferred counter to make sure that
+		 * the sampling is not done in large bursts */
+		info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+		rate++;
+		mi->sample_deferred++;
+	} else {
+		if (!msr->sample_limit != 0)
+			return;
+
+		mi->sample_count++;
+		if (msr->sample_limit > 0)
+			msr->sample_limit--;
+	}
+
+	/* If we're not using MRR and the sampling rate already
+	 * has a probability of >95%, we shouldn't be attempting
+	 * to use it, as this only wastes precious airtime */
+	if (!mrr_capable &&
+	   (mi->r[ndx].probability > MINSTREL_FRAC(95, 100)))
+		return;
+
+	mi->prev_sample = true;
+
+	rate->idx = mi->r[ndx].rix;
+	rate->count = minstrel_get_retry_count(&mi->r[ndx], info);
+}
+
+
+static void
+calc_rate_durations(enum ieee80211_band band,
+		    struct minstrel_rate *d,
+		    struct ieee80211_rate *rate)
+{
+	int erp = !!(rate->flags & IEEE80211_RATE_ERP_G);
+
+	d->perfect_tx_time = ieee80211_frame_duration(band, 1200,
+			rate->bitrate, erp, 1);
+	d->ack_time = ieee80211_frame_duration(band, 10,
+			rate->bitrate, erp, 1);
+}
+
+static void
+init_sample_table(struct minstrel_sta_info *mi)
+{
+	unsigned int i, col, new_idx;
+	u8 rnd[8];
+
+	mi->sample_column = 0;
+	mi->sample_row = 0;
+	memset(mi->sample_table, 0xff, SAMPLE_COLUMNS * mi->n_rates);
+
+	for (col = 0; col < SAMPLE_COLUMNS; col++) {
+		for (i = 0; i < mi->n_rates; i++) {
+			get_random_bytes(rnd, sizeof(rnd));
+			new_idx = (i + rnd[i & 7]) % mi->n_rates;
+
+			while (SAMPLE_TBL(mi, new_idx, col) != 0xff)
+				new_idx = (new_idx + 1) % mi->n_rates;
+
+			SAMPLE_TBL(mi, new_idx, col) = i;
+		}
+	}
+}
+
+static void
+minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
+               struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+	struct minstrel_priv *mp = priv;
+	struct ieee80211_rate *ctl_rate;
+	unsigned int i, n = 0;
+	unsigned int t_slot = 9; /* FIXME: get real slot time */
+
+	mi->sta = sta;
+	mi->lowest_rix = rate_lowest_index(sband, sta);
+	ctl_rate = &sband->bitrates[mi->lowest_rix];
+	mi->sp_ack_dur = ieee80211_frame_duration(sband->band, 10,
+				ctl_rate->bitrate,
+				!!(ctl_rate->flags & IEEE80211_RATE_ERP_G), 1);
+
+	memset(mi->max_tp_rate, 0, sizeof(mi->max_tp_rate));
+	mi->max_prob_rate = 0;
+
+	for (i = 0; i < sband->n_bitrates; i++) {
+		struct minstrel_rate *mr = &mi->r[n];
+		unsigned int tx_time = 0, tx_time_cts = 0, tx_time_rtscts = 0;
+		unsigned int tx_time_single;
+		unsigned int cw = mp->cw_min;
+
+		if (!rate_supported(sta, sband->band, i))
+			continue;
+		n++;
+		memset(mr, 0, sizeof(*mr));
+
+		mr->rix = i;
+		mr->bitrate = sband->bitrates[i].bitrate / 5;
+		calc_rate_durations(sband->band, mr, &sband->bitrates[i]);
+
+		/* calculate maximum number of retransmissions before
+		 * fallback (based on maximum segment size) */
+		mr->sample_limit = -1;
+		mr->retry_count = 1;
+		mr->retry_count_cts = 1;
+		mr->retry_count_rtscts = 1;
+		tx_time = mr->perfect_tx_time + mi->sp_ack_dur;
+		do {
+			/* add one retransmission */
+			tx_time_single = mr->ack_time + mr->perfect_tx_time;
+
+			/* contention window */
+			tx_time_single += (t_slot * cw) >> 1;
+			cw = min((cw << 1) | 1, mp->cw_max);
+
+			tx_time += tx_time_single;
+			tx_time_cts += tx_time_single + mi->sp_ack_dur;
+			tx_time_rtscts += tx_time_single + 2 * mi->sp_ack_dur;
+			if ((tx_time_cts < mp->segment_size) &&
+				(mr->retry_count_cts < mp->max_retry))
+				mr->retry_count_cts++;
+			if ((tx_time_rtscts < mp->segment_size) &&
+				(mr->retry_count_rtscts < mp->max_retry))
+				mr->retry_count_rtscts++;
+		} while ((tx_time < mp->segment_size) &&
+				(++mr->retry_count < mp->max_retry));
+		mr->adjusted_retry_count = mr->retry_count;
+		if (!(sband->bitrates[i].flags & IEEE80211_RATE_ERP_G))
+			mr->retry_count_cts = mr->retry_count;
+	}
+
+	for (i = n; i < sband->n_bitrates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+		mr->rix = -1;
+	}
+
+	mi->n_rates = n;
+	mi->stats_update = jiffies;
+
+	init_sample_table(mi);
+	minstrel_update_rates(mp, mi);
+}
+
+static void *
+minstrel_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
+{
+	struct ieee80211_supported_band *sband;
+	struct minstrel_sta_info *mi;
+	struct minstrel_priv *mp = priv;
+	struct ieee80211_hw *hw = mp->hw;
+	int max_rates = 0;
+	int i;
+
+	mi = kzalloc(sizeof(struct minstrel_sta_info), gfp);
+	if (!mi)
+		return NULL;
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+		sband = hw->wiphy->bands[i];
+		if (sband && sband->n_bitrates > max_rates)
+			max_rates = sband->n_bitrates;
+	}
+
+	mi->r = kzalloc(sizeof(struct minstrel_rate) * max_rates, gfp);
+	if (!mi->r)
+		goto error;
+
+	mi->sample_table = kmalloc(SAMPLE_COLUMNS * max_rates, gfp);
+	if (!mi->sample_table)
+		goto error1;
+
+	mi->stats_update = jiffies;
+	return mi;
+
+error1:
+	kfree(mi->r);
+error:
+	kfree(mi);
+	return NULL;
+}
+
+static void
+minstrel_free_sta(void *priv, struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+
+	kfree(mi->sample_table);
+	kfree(mi->r);
+	kfree(mi);
+}
+
+static void
+minstrel_init_cck_rates(struct minstrel_priv *mp)
+{
+	static const int bitrates[4] = { 10, 20, 55, 110 };
+	struct ieee80211_supported_band *sband;
+	int i, j;
+
+	sband = mp->hw->wiphy->bands[IEEE80211_BAND_2GHZ];
+	if (!sband)
+		return;
+
+	for (i = 0, j = 0; i < sband->n_bitrates; i++) {
+		struct ieee80211_rate *rate = &sband->bitrates[i];
+
+		if (rate->flags & IEEE80211_RATE_ERP_G)
+			continue;
+
+		for (j = 0; j < ARRAY_SIZE(bitrates); j++) {
+			if (rate->bitrate != bitrates[j])
+				continue;
+
+			mp->cck_rates[j] = i;
+			break;
+		}
+	}
+}
+
+static void *
+minstrel_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
+{
+	struct minstrel_priv *mp;
+
+	mp = kzalloc(sizeof(struct minstrel_priv), GFP_ATOMIC);
+	if (!mp)
+		return NULL;
+
+	/* contention window settings
+	 * Just an approximation. Using the per-queue values would complicate
+	 * the calculations and is probably unnecessary */
+	mp->cw_min = 15;
+	mp->cw_max = 1023;
+
+	/* number of packets (in %) to use for sampling other rates
+	 * sample less often for non-mrr packets, because the overhead
+	 * is much higher than with mrr */
+	mp->lookaround_rate = 5;
+	mp->lookaround_rate_mrr = 10;
+
+	/* maximum time that the hw is allowed to stay in one MRR segment */
+	mp->segment_size = 6000;
+
+	if (hw->max_rate_tries > 0)
+		mp->max_retry = hw->max_rate_tries;
+	else
+		/* safe default, does not necessarily have to match hw properties */
+		mp->max_retry = 7;
+
+	if (hw->max_rates >= 4)
+		mp->has_mrr = true;
+
+	mp->hw = hw;
+	mp->update_interval = 100;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	mp->fixed_rate_idx = (u32) -1;
+	mp->dbg_fixed_rate = debugfs_create_u32("fixed_rate_idx",
+			S_IRUGO | S_IWUGO, debugfsdir, &mp->fixed_rate_idx);
+#endif
+
+	minstrel_init_cck_rates(mp);
+
+	return mp;
+}
+
+static void
+minstrel_free(void *priv)
+{
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	debugfs_remove(((struct minstrel_priv *)priv)->dbg_fixed_rate);
+#endif
+	kfree(priv);
+}
+
+struct rate_control_ops mac80211_minstrel = {
+	.name = "minstrel",
+	.tx_status = minstrel_tx_status,
+	.get_rate = minstrel_get_rate,
+	.rate_init = minstrel_rate_init,
+	.alloc = minstrel_alloc,
+	.free = minstrel_free,
+	.alloc_sta = minstrel_alloc_sta,
+	.free_sta = minstrel_free_sta,
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	.add_sta_debugfs = minstrel_add_sta_debugfs,
+	.remove_sta_debugfs = minstrel_remove_sta_debugfs,
+#endif
+};
+
+int __init
+rc80211_minstrel_init(void)
+{
+	return ieee80211_rate_control_register(&mac80211_minstrel);
+}
+
+void
+rc80211_minstrel_exit(void)
+{
+	ieee80211_rate_control_unregister(&mac80211_minstrel);
+}
+
diff --git a/net/mac80211/rc80211_minstrel.h b/net/mac80211/rc80211_minstrel.h
new file mode 100644
index 0000000..73a5335
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel.h
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __RC_MINSTREL_H
+#define __RC_MINSTREL_H
+
+#define EWMA_LEVEL	96	/* ewma weighting factor [/EWMA_DIV] */
+#define EWMA_DIV	128
+#define SAMPLE_COLUMNS	10	/* number of columns in sample table */
+
+
+/* scaled fraction values */
+#define MINSTREL_SCALE  16
+#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
+#define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE)
+
+/* number of highest throughput rates to consider*/
+#define MAX_THR_RATES 4
+
+/*
+ * Perform EWMA (Exponentially Weighted Moving Average) calculation
+  */
+static inline int
+minstrel_ewma(int old, int new, int weight)
+{
+	return (new * (EWMA_DIV - weight) + old * weight) / EWMA_DIV;
+}
+
+
+struct minstrel_rate {
+	int bitrate;
+	int rix;
+
+	unsigned int perfect_tx_time;
+	unsigned int ack_time;
+
+	int sample_limit;
+	unsigned int retry_count;
+	unsigned int retry_count_cts;
+	unsigned int retry_count_rtscts;
+	unsigned int adjusted_retry_count;
+
+	u32 success;
+	u32 attempts;
+	u32 last_attempts;
+	u32 last_success;
+	u8 sample_skipped;
+
+	/* parts per thousand */
+	u32 cur_prob;
+	u32 probability;
+
+	/* per-rate throughput */
+	u32 cur_tp;
+
+	u64 succ_hist;
+	u64 att_hist;
+};
+
+struct minstrel_sta_info {
+	struct ieee80211_sta *sta;
+
+	unsigned long stats_update;
+	unsigned int sp_ack_dur;
+	unsigned int rate_avg;
+
+	unsigned int lowest_rix;
+
+	u8 max_tp_rate[MAX_THR_RATES];
+	u8 max_prob_rate;
+	unsigned int packet_count;
+	unsigned int sample_count;
+	int sample_deferred;
+
+	unsigned int sample_row;
+	unsigned int sample_column;
+
+	int n_rates;
+	struct minstrel_rate *r;
+	bool prev_sample;
+
+	/* sampling table */
+	u8 *sample_table;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct dentry *dbg_stats;
+#endif
+};
+
+struct minstrel_priv {
+	struct ieee80211_hw *hw;
+	bool has_mrr;
+	unsigned int cw_min;
+	unsigned int cw_max;
+	unsigned int max_retry;
+	unsigned int segment_size;
+	unsigned int update_interval;
+	unsigned int lookaround_rate;
+	unsigned int lookaround_rate_mrr;
+
+	u8 cck_rates[4];
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	/*
+	 * enable fixed rate processing per RC
+	 *   - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
+	 *   - write -1 to enable RC processing again
+	 *   - setting will be applied on next update
+	 */
+	u32 fixed_rate_idx;
+	struct dentry *dbg_fixed_rate;
+#endif
+
+};
+
+struct minstrel_debugfs_info {
+	size_t len;
+	char buf[];
+};
+
+extern struct rate_control_ops mac80211_minstrel;
+void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
+
+/* debugfs */
+int minstrel_stats_open(struct inode *inode, struct file *file);
+ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
+int minstrel_stats_release(struct inode *inode, struct file *file);
+
+#endif
diff --git a/net/mac80211/rc80211_minstrel_debugfs.c b/net/mac80211/rc80211_minstrel_debugfs.c
new file mode 100644
index 0000000..fd0b9ca
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_debugfs.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on minstrel.c:
+ *   Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
+ *   Sponsored by Indranet Technologies Ltd
+ *
+ * Based on sample.c:
+ *   Copyright (c) 2005 John Bicket
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer,
+ *      without modification.
+ *   2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *      similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *      redistribution must be conditioned upon including a substantially
+ *      similar Disclaimer requirement for further binary redistribution.
+ *   3. Neither the names of the above-listed copyright holders nor the names
+ *      of any contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *
+ *   Alternatively, this software may be distributed under the terms of the
+ *   GNU General Public License ("GPL") version 2 as published by the Free
+ *   Software Foundation.
+ *
+ *   NO WARRANTY
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ *   THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ *   OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ *   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ *   THE POSSIBILITY OF SUCH DAMAGES.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/ieee80211.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "rc80211_minstrel.h"
+
+int
+minstrel_stats_open(struct inode *inode, struct file *file)
+{
+	struct minstrel_sta_info *mi = inode->i_private;
+	struct minstrel_debugfs_info *ms;
+	unsigned int i, tp, prob, eprob;
+	char *p;
+
+	ms = kmalloc(sizeof(*ms) + 4096, GFP_KERNEL);
+	if (!ms)
+		return -ENOMEM;
+
+	file->private_data = ms;
+	p = ms->buf;
+	p += sprintf(p, "rate      throughput  ewma prob  this prob  "
+			"this succ/attempt   success    attempts\n");
+	for (i = 0; i < mi->n_rates; i++) {
+		struct minstrel_rate *mr = &mi->r[i];
+
+		*(p++) = (i == mi->max_tp_rate[0]) ? 'A' : ' ';
+		*(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' ';
+		*(p++) = (i == mi->max_tp_rate[2]) ? 'C' : ' ';
+		*(p++) = (i == mi->max_tp_rate[3]) ? 'D' : ' ';
+		*(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
+		p += sprintf(p, "%3u%s", mr->bitrate / 2,
+				(mr->bitrate & 1 ? ".5" : "  "));
+
+		tp = MINSTREL_TRUNC(mr->cur_tp / 10);
+		prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
+		eprob = MINSTREL_TRUNC(mr->probability * 1000);
+
+		p += sprintf(p, "  %6u.%1u   %6u.%1u   %6u.%1u        "
+				"   %3u(%3u)  %8llu    %8llu\n",
+				tp / 10, tp % 10,
+				eprob / 10, eprob % 10,
+				prob / 10, prob % 10,
+				mr->last_success,
+				mr->last_attempts,
+				(unsigned long long)mr->succ_hist,
+				(unsigned long long)mr->att_hist);
+	}
+	p += sprintf(p, "\nTotal packet count::    ideal %d      "
+			"lookaround %d\n\n",
+			mi->packet_count - mi->sample_count,
+			mi->sample_count);
+	ms->len = p - ms->buf;
+
+	return 0;
+}
+
+ssize_t
+minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
+{
+	struct minstrel_debugfs_info *ms;
+
+	ms = file->private_data;
+	return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
+}
+
+int
+minstrel_stats_release(struct inode *inode, struct file *file)
+{
+	kfree(file->private_data);
+	return 0;
+}
+
+static const struct file_operations minstrel_stat_fops = {
+	.owner = THIS_MODULE,
+	.open = minstrel_stats_open,
+	.read = minstrel_stats_read,
+	.release = minstrel_stats_release,
+	.llseek = default_llseek,
+};
+
+void
+minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+
+	mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
+			&minstrel_stat_fops);
+}
+
+void
+minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
+{
+	struct minstrel_sta_info *mi = priv_sta;
+
+	debugfs_remove(mi->dbg_stats);
+}
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
new file mode 100644
index 0000000..2f4cc44
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -0,0 +1,1070 @@
+/*
+ * Copyright (C) 2010-2013 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/random.h>
+#include <linux/ieee80211.h>
+#include <net/mac80211.h>
+#include "rate.h"
+#include "rc80211_minstrel.h"
+#include "rc80211_minstrel_ht.h"
+
+#define AVG_PKT_SIZE	1200
+
+/* Number of bits for an average sized packet */
+#define MCS_NBITS (AVG_PKT_SIZE << 3)
+
+/* Number of symbols for a packet with (bps) bits per symbol */
+#define MCS_NSYMS(bps) ((MCS_NBITS + (bps) - 1) / (bps))
+
+/* Transmission time (nanoseconds) for a packet containing (syms) symbols */
+#define MCS_SYMBOL_TIME(sgi, syms)					\
+	(sgi ?								\
+	  ((syms) * 18000 + 4000) / 5 :	/* syms * 3.6 us */		\
+	  ((syms) * 1000) << 2		/* syms * 4 us */		\
+	)
+
+/* Transmit duration for the raw data part of an average sized packet */
+#define MCS_DURATION(streams, sgi, bps) MCS_SYMBOL_TIME(sgi, MCS_NSYMS((streams) * (bps)))
+
+/*
+ * Define group sort order: HT40 -> SGI -> #streams
+ */
+#define GROUP_IDX(_streams, _sgi, _ht40)	\
+	MINSTREL_MAX_STREAMS * 2 * _ht40 +	\
+	MINSTREL_MAX_STREAMS * _sgi +		\
+	_streams - 1
+
+/* MCS rate information for an MCS group */
+#define MCS_GROUP(_streams, _sgi, _ht40)				\
+	[GROUP_IDX(_streams, _sgi, _ht40)] = {				\
+	.streams = _streams,						\
+	.flags =							\
+		(_sgi ? IEEE80211_TX_RC_SHORT_GI : 0) |			\
+		(_ht40 ? IEEE80211_TX_RC_40_MHZ_WIDTH : 0),		\
+	.duration = {							\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26),		\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 108 : 52),		\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 162 : 78),		\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 216 : 104),	\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 324 : 156),	\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 432 : 208),	\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 486 : 234),	\
+		MCS_DURATION(_streams, _sgi, _ht40 ? 540 : 260)		\
+	}								\
+}
+
+#define CCK_DURATION(_bitrate, _short, _len)		\
+	(1000 * (10 /* SIFS */ +			\
+	 (_short ? 72 + 24 : 144 + 48 ) +		\
+	 (8 * (_len + 4) * 10) / (_bitrate)))
+
+#define CCK_ACK_DURATION(_bitrate, _short)			\
+	(CCK_DURATION((_bitrate > 10 ? 20 : 10), false, 60) +	\
+	 CCK_DURATION(_bitrate, _short, AVG_PKT_SIZE))
+
+#define CCK_DURATION_LIST(_short)			\
+	CCK_ACK_DURATION(10, _short),			\
+	CCK_ACK_DURATION(20, _short),			\
+	CCK_ACK_DURATION(55, _short),			\
+	CCK_ACK_DURATION(110, _short)
+
+#define CCK_GROUP						\
+	[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS] = {	\
+		.streams = 0,					\
+		.duration = {					\
+			CCK_DURATION_LIST(false),		\
+			CCK_DURATION_LIST(true)			\
+		}						\
+	}
+
+/*
+ * To enable sufficiently targeted rate sampling, MCS rates are divided into
+ * groups, based on the number of streams and flags (HT40, SGI) that they
+ * use.
+ *
+ * Sortorder has to be fixed for GROUP_IDX macro to be applicable:
+ * HT40 -> SGI -> #streams
+ */
+const struct mcs_group minstrel_mcs_groups[] = {
+	MCS_GROUP(1, 0, 0),
+	MCS_GROUP(2, 0, 0),
+#if MINSTREL_MAX_STREAMS >= 3
+	MCS_GROUP(3, 0, 0),
+#endif
+
+	MCS_GROUP(1, 1, 0),
+	MCS_GROUP(2, 1, 0),
+#if MINSTREL_MAX_STREAMS >= 3
+	MCS_GROUP(3, 1, 0),
+#endif
+
+	MCS_GROUP(1, 0, 1),
+	MCS_GROUP(2, 0, 1),
+#if MINSTREL_MAX_STREAMS >= 3
+	MCS_GROUP(3, 0, 1),
+#endif
+
+	MCS_GROUP(1, 1, 1),
+	MCS_GROUP(2, 1, 1),
+#if MINSTREL_MAX_STREAMS >= 3
+	MCS_GROUP(3, 1, 1),
+#endif
+
+	/* must be last */
+	CCK_GROUP
+};
+
+#define MINSTREL_CCK_GROUP	(ARRAY_SIZE(minstrel_mcs_groups) - 1)
+
+static u8 sample_table[SAMPLE_COLUMNS][MCS_GROUP_RATES];
+
+static void
+minstrel_ht_update_rates(struct minstrel_priv *mp, struct minstrel_ht_sta *mi);
+
+/*
+ * Look up an MCS group index based on mac80211 rate information
+ */
+static int
+minstrel_ht_get_group_idx(struct ieee80211_tx_rate *rate)
+{
+	return GROUP_IDX((rate->idx / MCS_GROUP_RATES) + 1,
+			 !!(rate->flags & IEEE80211_TX_RC_SHORT_GI),
+			 !!(rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH));
+}
+
+static struct minstrel_rate_stats *
+minstrel_ht_get_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
+		      struct ieee80211_tx_rate *rate)
+{
+	int group, idx;
+
+	if (rate->flags & IEEE80211_TX_RC_MCS) {
+		group = minstrel_ht_get_group_idx(rate);
+		idx = rate->idx % MCS_GROUP_RATES;
+	} else {
+		group = MINSTREL_CCK_GROUP;
+
+		for (idx = 0; idx < ARRAY_SIZE(mp->cck_rates); idx++)
+			if (rate->idx == mp->cck_rates[idx])
+				break;
+
+		/* short preamble */
+		if (!(mi->groups[group].supported & BIT(idx)))
+			idx += 4;
+	}
+	return &mi->groups[group].rates[idx];
+}
+
+static inline struct minstrel_rate_stats *
+minstrel_get_ratestats(struct minstrel_ht_sta *mi, int index)
+{
+	return &mi->groups[index / MCS_GROUP_RATES].rates[index % MCS_GROUP_RATES];
+}
+
+
+/*
+ * Recalculate success probabilities and counters for a rate using EWMA
+ */
+static void
+minstrel_calc_rate_ewma(struct minstrel_rate_stats *mr)
+{
+	if (unlikely(mr->attempts > 0)) {
+		mr->sample_skipped = 0;
+		mr->cur_prob = MINSTREL_FRAC(mr->success, mr->attempts);
+		if (!mr->att_hist)
+			mr->probability = mr->cur_prob;
+		else
+			mr->probability = minstrel_ewma(mr->probability,
+				mr->cur_prob, EWMA_LEVEL);
+		mr->att_hist += mr->attempts;
+		mr->succ_hist += mr->success;
+	} else {
+		mr->sample_skipped++;
+	}
+	mr->last_success = mr->success;
+	mr->last_attempts = mr->attempts;
+	mr->success = 0;
+	mr->attempts = 0;
+}
+
+/*
+ * Calculate throughput based on the average A-MPDU length, taking into account
+ * the expected number of retransmissions and their expected length
+ */
+static void
+minstrel_ht_calc_tp(struct minstrel_ht_sta *mi, int group, int rate)
+{
+	struct minstrel_rate_stats *mr;
+	unsigned int nsecs = 0;
+	unsigned int tp;
+	unsigned int prob;
+
+	mr = &mi->groups[group].rates[rate];
+	prob = mr->probability;
+
+	if (prob < MINSTREL_FRAC(1, 10)) {
+		mr->cur_tp = 0;
+		return;
+	}
+
+	/*
+	 * For the throughput calculation, limit the probability value to 90% to
+	 * account for collision related packet error rate fluctuation
+	 */
+	if (prob > MINSTREL_FRAC(9, 10))
+		prob = MINSTREL_FRAC(9, 10);
+
+	if (group != MINSTREL_CCK_GROUP)
+		nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
+
+	nsecs += minstrel_mcs_groups[group].duration[rate];
+	tp = 1000000 * ((mr->probability * 1000) / nsecs);
+
+	mr->cur_tp = MINSTREL_TRUNC(tp);
+}
+
+/*
+ * Update rate statistics and select new primary rates
+ *
+ * Rules for rate selection:
+ *  - max_prob_rate must use only one stream, as a tradeoff between delivery
+ *    probability and throughput during strong fluctuations
+ *  - as long as the max prob rate has a probability of more than 3/4, pick
+ *    higher throughput rates, even if the probablity is a bit lower
+ */
+static void
+minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
+{
+	struct minstrel_mcs_group_data *mg;
+	struct minstrel_rate_stats *mr;
+	int cur_prob, cur_prob_tp, cur_tp, cur_tp2;
+	int group, i, index;
+	bool mi_rates_valid = false;
+
+	if (mi->ampdu_packets > 0) {
+		mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
+			MINSTREL_FRAC(mi->ampdu_len, mi->ampdu_packets), EWMA_LEVEL);
+		mi->ampdu_len = 0;
+		mi->ampdu_packets = 0;
+	}
+
+	mi->sample_slow = 0;
+	mi->sample_count = 0;
+
+	for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
+		bool mg_rates_valid = false;
+
+		cur_prob = 0;
+		cur_prob_tp = 0;
+		cur_tp = 0;
+		cur_tp2 = 0;
+
+		mg = &mi->groups[group];
+		if (!mg->supported)
+			continue;
+
+		mi->sample_count++;
+
+		for (i = 0; i < MCS_GROUP_RATES; i++) {
+			if (!(mg->supported & BIT(i)))
+				continue;
+
+			/* initialize rates selections starting indexes */
+			if (!mg_rates_valid) {
+				mg->max_tp_rate = mg->max_tp_rate2 =
+					mg->max_prob_rate = i;
+				if (!mi_rates_valid) {
+					mi->max_tp_rate = mi->max_tp_rate2 =
+						mi->max_prob_rate = i;
+					mi_rates_valid = true;
+				}
+				mg_rates_valid = true;
+			}
+
+			mr = &mg->rates[i];
+			mr->retry_updated = false;
+			index = MCS_GROUP_RATES * group + i;
+			minstrel_calc_rate_ewma(mr);
+			minstrel_ht_calc_tp(mi, group, i);
+
+			if (!mr->cur_tp)
+				continue;
+
+			if ((mr->cur_tp > cur_prob_tp && mr->probability >
+			     MINSTREL_FRAC(3, 4)) || mr->probability > cur_prob) {
+				mg->max_prob_rate = index;
+				cur_prob = mr->probability;
+				cur_prob_tp = mr->cur_tp;
+			}
+
+			if (mr->cur_tp > cur_tp) {
+				swap(index, mg->max_tp_rate);
+				cur_tp = mr->cur_tp;
+				mr = minstrel_get_ratestats(mi, index);
+			}
+
+			if (index >= mg->max_tp_rate)
+				continue;
+
+			if (mr->cur_tp > cur_tp2) {
+				mg->max_tp_rate2 = index;
+				cur_tp2 = mr->cur_tp;
+			}
+		}
+	}
+
+	/* try to sample all available rates during each interval */
+	mi->sample_count *= 8;
+
+	cur_prob = 0;
+	cur_prob_tp = 0;
+	cur_tp = 0;
+	cur_tp2 = 0;
+	for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
+		mg = &mi->groups[group];
+		if (!mg->supported)
+			continue;
+
+		mr = minstrel_get_ratestats(mi, mg->max_tp_rate);
+		if (cur_tp < mr->cur_tp) {
+			mi->max_tp_rate2 = mi->max_tp_rate;
+			cur_tp2 = cur_tp;
+			mi->max_tp_rate = mg->max_tp_rate;
+			cur_tp = mr->cur_tp;
+			mi->max_prob_streams = minstrel_mcs_groups[group].streams - 1;
+		}
+
+		mr = minstrel_get_ratestats(mi, mg->max_tp_rate2);
+		if (cur_tp2 < mr->cur_tp) {
+			mi->max_tp_rate2 = mg->max_tp_rate2;
+			cur_tp2 = mr->cur_tp;
+		}
+	}
+
+	if (mi->max_prob_streams < 1)
+		mi->max_prob_streams = 1;
+
+	for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
+		mg = &mi->groups[group];
+		if (!mg->supported)
+			continue;
+		mr = minstrel_get_ratestats(mi, mg->max_prob_rate);
+		if (cur_prob_tp < mr->cur_tp &&
+		    minstrel_mcs_groups[group].streams <= mi->max_prob_streams) {
+			mi->max_prob_rate = mg->max_prob_rate;
+			cur_prob = mr->cur_prob;
+			cur_prob_tp = mr->cur_tp;
+		}
+	}
+
+
+	mi->stats_update = jiffies;
+}
+
+static bool
+minstrel_ht_txstat_valid(struct minstrel_priv *mp, struct ieee80211_tx_rate *rate)
+{
+	if (rate->idx < 0)
+		return false;
+
+	if (!rate->count)
+		return false;
+
+	if (rate->flags & IEEE80211_TX_RC_MCS)
+		return true;
+
+	return rate->idx == mp->cck_rates[0] ||
+	       rate->idx == mp->cck_rates[1] ||
+	       rate->idx == mp->cck_rates[2] ||
+	       rate->idx == mp->cck_rates[3];
+}
+
+static void
+minstrel_next_sample_idx(struct minstrel_ht_sta *mi)
+{
+	struct minstrel_mcs_group_data *mg;
+
+	for (;;) {
+		mi->sample_group++;
+		mi->sample_group %= ARRAY_SIZE(minstrel_mcs_groups);
+		mg = &mi->groups[mi->sample_group];
+
+		if (!mg->supported)
+			continue;
+
+		if (++mg->index >= MCS_GROUP_RATES) {
+			mg->index = 0;
+			if (++mg->column >= ARRAY_SIZE(sample_table))
+				mg->column = 0;
+		}
+		break;
+	}
+}
+
+static void
+minstrel_downgrade_rate(struct minstrel_ht_sta *mi, unsigned int *idx,
+			bool primary)
+{
+	int group, orig_group;
+
+	orig_group = group = *idx / MCS_GROUP_RATES;
+	while (group > 0) {
+		group--;
+
+		if (!mi->groups[group].supported)
+			continue;
+
+		if (minstrel_mcs_groups[group].streams >
+		    minstrel_mcs_groups[orig_group].streams)
+			continue;
+
+		if (primary)
+			*idx = mi->groups[group].max_tp_rate;
+		else
+			*idx = mi->groups[group].max_tp_rate2;
+		break;
+	}
+}
+
+static void
+minstrel_aggr_check(struct ieee80211_sta *pubsta, struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+	u16 tid;
+
+	if (unlikely(!ieee80211_is_data_qos(hdr->frame_control)))
+		return;
+
+	if (unlikely(skb->protocol == cpu_to_be16(ETH_P_PAE)))
+		return;
+
+	tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
+	if (likely(sta->ampdu_mlme.tid_tx[tid]))
+		return;
+
+	if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
+		return;
+
+	ieee80211_start_tx_ba_session(pubsta, tid, 5000);
+}
+
+static void
+minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
+                      struct ieee80211_sta *sta, void *priv_sta,
+                      struct sk_buff *skb)
+{
+	struct minstrel_ht_sta_priv *msp = priv_sta;
+	struct minstrel_ht_sta *mi = &msp->ht;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_tx_rate *ar = info->status.rates;
+	struct minstrel_rate_stats *rate, *rate2;
+	struct minstrel_priv *mp = priv;
+	bool last, update = false;
+	int i;
+
+	if (!msp->is_ht)
+		return mac80211_minstrel.tx_status(priv, sband, sta, &msp->legacy, skb);
+
+	/* This packet was aggregated but doesn't carry status info */
+	if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
+	    !(info->flags & IEEE80211_TX_STAT_AMPDU))
+		return;
+
+	if (!(info->flags & IEEE80211_TX_STAT_AMPDU)) {
+		info->status.ampdu_ack_len =
+			(info->flags & IEEE80211_TX_STAT_ACK ? 1 : 0);
+		info->status.ampdu_len = 1;
+	}
+
+	mi->ampdu_packets++;
+	mi->ampdu_len += info->status.ampdu_len;
+
+	if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
+		mi->sample_wait = 16 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
+		mi->sample_tries = 1;
+		mi->sample_count--;
+	}
+
+	if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
+		mi->sample_packets += info->status.ampdu_len;
+
+	last = !minstrel_ht_txstat_valid(mp, &ar[0]);
+	for (i = 0; !last; i++) {
+		last = (i == IEEE80211_TX_MAX_RATES - 1) ||
+		       !minstrel_ht_txstat_valid(mp, &ar[i + 1]);
+
+		rate = minstrel_ht_get_stats(mp, mi, &ar[i]);
+
+		if (last)
+			rate->success += info->status.ampdu_ack_len;
+
+		rate->attempts += ar[i].count * info->status.ampdu_len;
+	}
+
+	/*
+	 * check for sudden death of spatial multiplexing,
+	 * downgrade to a lower number of streams if necessary.
+	 */
+	rate = minstrel_get_ratestats(mi, mi->max_tp_rate);
+	if (rate->attempts > 30 &&
+	    MINSTREL_FRAC(rate->success, rate->attempts) <
+	    MINSTREL_FRAC(20, 100)) {
+		minstrel_downgrade_rate(mi, &mi->max_tp_rate, true);
+		update = true;
+	}
+
+	rate2 = minstrel_get_ratestats(mi, mi->max_tp_rate2);
+	if (rate2->attempts > 30 &&
+	    MINSTREL_FRAC(rate2->success, rate2->attempts) <
+	    MINSTREL_FRAC(20, 100)) {
+		minstrel_downgrade_rate(mi, &mi->max_tp_rate2, false);
+		update = true;
+	}
+
+	if (time_after(jiffies, mi->stats_update + (mp->update_interval / 2 * HZ) / 1000)) {
+		update = true;
+		minstrel_ht_update_stats(mp, mi);
+		if (!(info->flags & IEEE80211_TX_CTL_AMPDU) &&
+		    mi->max_prob_rate / MCS_GROUP_RATES != MINSTREL_CCK_GROUP)
+			minstrel_aggr_check(sta, skb);
+	}
+
+	if (update)
+		minstrel_ht_update_rates(mp, mi);
+}
+
+static void
+minstrel_calc_retransmit(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
+                         int index)
+{
+	struct minstrel_rate_stats *mr;
+	const struct mcs_group *group;
+	unsigned int tx_time, tx_time_rtscts, tx_time_data;
+	unsigned int cw = mp->cw_min;
+	unsigned int ctime = 0;
+	unsigned int t_slot = 9; /* FIXME */
+	unsigned int ampdu_len = MINSTREL_TRUNC(mi->avg_ampdu_len);
+	unsigned int overhead = 0, overhead_rtscts = 0;
+
+	mr = minstrel_get_ratestats(mi, index);
+	if (mr->probability < MINSTREL_FRAC(1, 10)) {
+		mr->retry_count = 1;
+		mr->retry_count_rtscts = 1;
+		return;
+	}
+
+	mr->retry_count = 2;
+	mr->retry_count_rtscts = 2;
+	mr->retry_updated = true;
+
+	group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
+	tx_time_data = group->duration[index % MCS_GROUP_RATES] * ampdu_len / 1000;
+
+	/* Contention time for first 2 tries */
+	ctime = (t_slot * cw) >> 1;
+	cw = min((cw << 1) | 1, mp->cw_max);
+	ctime += (t_slot * cw) >> 1;
+	cw = min((cw << 1) | 1, mp->cw_max);
+
+	if (index / MCS_GROUP_RATES != MINSTREL_CCK_GROUP) {
+		overhead = mi->overhead;
+		overhead_rtscts = mi->overhead_rtscts;
+	}
+
+	/* Total TX time for data and Contention after first 2 tries */
+	tx_time = ctime + 2 * (overhead + tx_time_data);
+	tx_time_rtscts = ctime + 2 * (overhead_rtscts + tx_time_data);
+
+	/* See how many more tries we can fit inside segment size */
+	do {
+		/* Contention time for this try */
+		ctime = (t_slot * cw) >> 1;
+		cw = min((cw << 1) | 1, mp->cw_max);
+
+		/* Total TX time after this try */
+		tx_time += ctime + overhead + tx_time_data;
+		tx_time_rtscts += ctime + overhead_rtscts + tx_time_data;
+
+		if (tx_time_rtscts < mp->segment_size)
+			mr->retry_count_rtscts++;
+	} while ((tx_time < mp->segment_size) &&
+	         (++mr->retry_count < mp->max_retry));
+}
+
+
+static void
+minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
+                     struct ieee80211_sta_rates *ratetbl, int offset, int index)
+{
+	const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
+	struct minstrel_rate_stats *mr;
+	u8 idx;
+	u16 flags;
+
+	mr = minstrel_get_ratestats(mi, index);
+	if (!mr->retry_updated)
+		minstrel_calc_retransmit(mp, mi, index);
+
+	if (mr->probability < MINSTREL_FRAC(20, 100) || !mr->retry_count) {
+		ratetbl->rate[offset].count = 2;
+		ratetbl->rate[offset].count_rts = 2;
+		ratetbl->rate[offset].count_cts = 2;
+	} else {
+		ratetbl->rate[offset].count = mr->retry_count;
+		ratetbl->rate[offset].count_cts = mr->retry_count;
+		ratetbl->rate[offset].count_rts = mr->retry_count_rtscts;
+	}
+
+	if (index / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
+		idx = mp->cck_rates[index % ARRAY_SIZE(mp->cck_rates)];
+		flags = 0;
+	} else {
+		idx = index % MCS_GROUP_RATES +
+		      (group->streams - 1) * MCS_GROUP_RATES;
+		flags = IEEE80211_TX_RC_MCS | group->flags;
+	}
+
+	if (offset > 0) {
+		ratetbl->rate[offset].count = ratetbl->rate[offset].count_rts;
+		flags |= IEEE80211_TX_RC_USE_RTS_CTS;
+	}
+
+	ratetbl->rate[offset].idx = idx;
+	ratetbl->rate[offset].flags = flags;
+}
+
+static void
+minstrel_ht_update_rates(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
+{
+	struct ieee80211_sta_rates *rates;
+	int i = 0;
+
+	rates = kzalloc(sizeof(*rates), GFP_ATOMIC);
+	if (!rates)
+		return;
+
+	/* Start with max_tp_rate */
+	minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_tp_rate);
+
+	if (mp->hw->max_rates >= 3) {
+		/* At least 3 tx rates supported, use max_tp_rate2 next */
+		minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_tp_rate2);
+	}
+
+	if (mp->hw->max_rates >= 2) {
+		/*
+		 * At least 2 tx rates supported, use max_prob_rate next */
+		minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_prob_rate);
+	}
+
+	rates->rate[i].idx = -1;
+	rate_control_set_rates(mp->hw, mi->sta, rates);
+}
+
+static inline int
+minstrel_get_duration(int index)
+{
+	const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
+	return group->duration[index % MCS_GROUP_RATES];
+}
+
+static int
+minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
+{
+	struct minstrel_rate_stats *mr;
+	struct minstrel_mcs_group_data *mg;
+	unsigned int sample_dur, sample_group;
+	int sample_idx = 0;
+
+	if (mi->sample_wait > 0) {
+		mi->sample_wait--;
+		return -1;
+	}
+
+	if (!mi->sample_tries)
+		return -1;
+
+	mg = &mi->groups[mi->sample_group];
+	sample_idx = sample_table[mg->column][mg->index];
+	mr = &mg->rates[sample_idx];
+	sample_group = mi->sample_group;
+	sample_idx += sample_group * MCS_GROUP_RATES;
+	minstrel_next_sample_idx(mi);
+
+	/*
+	 * Sampling might add some overhead (RTS, no aggregation)
+	 * to the frame. Hence, don't use sampling for the currently
+	 * used rates.
+	 */
+	if (sample_idx == mi->max_tp_rate ||
+	    sample_idx == mi->max_tp_rate2 ||
+	    sample_idx == mi->max_prob_rate)
+		return -1;
+
+	/*
+	 * Do not sample if the probability is already higher than 95%
+	 * to avoid wasting airtime.
+	 */
+	if (mr->probability > MINSTREL_FRAC(95, 100))
+		return -1;
+
+	/*
+	 * Make sure that lower rates get sampled only occasionally,
+	 * if the link is working perfectly.
+	 */
+	sample_dur = minstrel_get_duration(sample_idx);
+	if (sample_dur >= minstrel_get_duration(mi->max_tp_rate2) &&
+	    (mi->max_prob_streams <
+	     minstrel_mcs_groups[sample_group].streams ||
+	     sample_dur >= minstrel_get_duration(mi->max_prob_rate))) {
+		if (mr->sample_skipped < 20)
+			return -1;
+
+		if (mi->sample_slow++ > 2)
+			return -1;
+	}
+	mi->sample_tries--;
+
+	return sample_idx;
+}
+
+static void
+minstrel_ht_check_cck_shortpreamble(struct minstrel_priv *mp,
+				    struct minstrel_ht_sta *mi, bool val)
+{
+	u8 supported = mi->groups[MINSTREL_CCK_GROUP].supported;
+
+	if (!supported || !mi->cck_supported_short)
+		return;
+
+	if (supported & (mi->cck_supported_short << (val * 4)))
+		return;
+
+	supported ^= mi->cck_supported_short | (mi->cck_supported_short << 4);
+	mi->groups[MINSTREL_CCK_GROUP].supported = supported;
+}
+
+static void
+minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
+                     struct ieee80211_tx_rate_control *txrc)
+{
+	const struct mcs_group *sample_group;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
+	struct ieee80211_tx_rate *rate = &info->status.rates[0];
+	struct minstrel_ht_sta_priv *msp = priv_sta;
+	struct minstrel_ht_sta *mi = &msp->ht;
+	struct minstrel_priv *mp = priv;
+	int sample_idx;
+
+	if (rate_control_send_low(sta, priv_sta, txrc))
+		return;
+
+	if (!msp->is_ht)
+		return mac80211_minstrel.get_rate(priv, sta, &msp->legacy, txrc);
+
+	info->flags |= mi->tx_flags;
+	minstrel_ht_check_cck_shortpreamble(mp, mi, txrc->short_preamble);
+
+	/* Don't use EAPOL frames for sampling on non-mrr hw */
+	if (mp->hw->max_rates == 1 &&
+	    txrc->skb->protocol == cpu_to_be16(ETH_P_PAE))
+		sample_idx = -1;
+	else
+		sample_idx = minstrel_get_sample_rate(mp, mi);
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	/* use fixed index if set */
+	if (mp->fixed_rate_idx != -1) {
+		mi->max_tp_rate = mp->fixed_rate_idx;
+		mi->max_tp_rate2 = mp->fixed_rate_idx;
+		mi->max_prob_rate = mp->fixed_rate_idx;
+		sample_idx = -1;
+	}
+#endif
+
+	mi->total_packets++;
+
+	/* wraparound */
+	if (mi->total_packets == ~0) {
+		mi->total_packets = 0;
+		mi->sample_packets = 0;
+	}
+
+	if (sample_idx < 0)
+		return;
+
+	sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES];
+	info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+	rate->count = 1;
+
+	if (sample_idx / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
+		int idx = sample_idx % ARRAY_SIZE(mp->cck_rates);
+		rate->idx = mp->cck_rates[idx];
+		rate->flags = 0;
+		return;
+	}
+
+	rate->idx = sample_idx % MCS_GROUP_RATES +
+		    (sample_group->streams - 1) * MCS_GROUP_RATES;
+	rate->flags = IEEE80211_TX_RC_MCS | sample_group->flags;
+}
+
+static void
+minstrel_ht_update_cck(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
+		       struct ieee80211_supported_band *sband,
+		       struct ieee80211_sta *sta)
+{
+	int i;
+
+	if (sband->band != IEEE80211_BAND_2GHZ)
+		return;
+
+	if (!(mp->hw->flags & IEEE80211_HW_SUPPORTS_HT_CCK_RATES))
+		return;
+
+	mi->cck_supported = 0;
+	mi->cck_supported_short = 0;
+	for (i = 0; i < 4; i++) {
+		if (!rate_supported(sta, sband->band, mp->cck_rates[i]))
+			continue;
+
+		mi->cck_supported |= BIT(i);
+		if (sband->bitrates[i].flags & IEEE80211_RATE_SHORT_PREAMBLE)
+			mi->cck_supported_short |= BIT(i);
+	}
+
+	mi->groups[MINSTREL_CCK_GROUP].supported = mi->cck_supported;
+}
+
+static void
+minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
+                        struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct minstrel_priv *mp = priv;
+	struct minstrel_ht_sta_priv *msp = priv_sta;
+	struct minstrel_ht_sta *mi = &msp->ht;
+	struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
+	u16 sta_cap = sta->ht_cap.cap;
+	int n_supported = 0;
+	int ack_dur;
+	int stbc;
+	int i;
+
+	/* fall back to the old minstrel for legacy stations */
+	if (!sta->ht_cap.ht_supported)
+		goto use_legacy;
+
+	BUILD_BUG_ON(ARRAY_SIZE(minstrel_mcs_groups) !=
+		MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS + 1);
+
+	msp->is_ht = true;
+	memset(mi, 0, sizeof(*mi));
+
+	mi->sta = sta;
+	mi->stats_update = jiffies;
+
+	ack_dur = ieee80211_frame_duration(sband->band, 10, 60, 1, 1);
+	mi->overhead = ieee80211_frame_duration(sband->band, 0, 60, 1, 1) + ack_dur;
+	mi->overhead_rtscts = mi->overhead + 2 * ack_dur;
+
+	mi->avg_ampdu_len = MINSTREL_FRAC(1, 1);
+
+	/* When using MRR, sample more on the first attempt, without delay */
+	if (mp->has_mrr) {
+		mi->sample_count = 16;
+		mi->sample_wait = 0;
+	} else {
+		mi->sample_count = 8;
+		mi->sample_wait = 8;
+	}
+	mi->sample_tries = 4;
+
+	stbc = (sta_cap & IEEE80211_HT_CAP_RX_STBC) >>
+		IEEE80211_HT_CAP_RX_STBC_SHIFT;
+	mi->tx_flags |= stbc << IEEE80211_TX_CTL_STBC_SHIFT;
+
+	if (sta_cap & IEEE80211_HT_CAP_LDPC_CODING)
+		mi->tx_flags |= IEEE80211_TX_CTL_LDPC;
+
+	for (i = 0; i < ARRAY_SIZE(mi->groups); i++) {
+		mi->groups[i].supported = 0;
+		if (i == MINSTREL_CCK_GROUP) {
+			minstrel_ht_update_cck(mp, mi, sband, sta);
+			continue;
+		}
+
+		if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_SHORT_GI) {
+			if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
+				if (!(sta_cap & IEEE80211_HT_CAP_SGI_40))
+					continue;
+			} else {
+				if (!(sta_cap & IEEE80211_HT_CAP_SGI_20))
+					continue;
+			}
+		}
+
+		if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH &&
+		    sta->bandwidth < IEEE80211_STA_RX_BW_40)
+			continue;
+
+		/* Mark MCS > 7 as unsupported if STA is in static SMPS mode */
+		if (sta->smps_mode == IEEE80211_SMPS_STATIC &&
+		    minstrel_mcs_groups[i].streams > 1)
+			continue;
+
+		mi->groups[i].supported =
+			mcs->rx_mask[minstrel_mcs_groups[i].streams - 1];
+
+		if (mi->groups[i].supported)
+			n_supported++;
+	}
+
+	if (!n_supported)
+		goto use_legacy;
+
+	/* create an initial rate table with the lowest supported rates */
+	minstrel_ht_update_stats(mp, mi);
+	minstrel_ht_update_rates(mp, mi);
+
+	return;
+
+use_legacy:
+	msp->is_ht = false;
+	memset(&msp->legacy, 0, sizeof(msp->legacy));
+	msp->legacy.r = msp->ratelist;
+	msp->legacy.sample_table = msp->sample_table;
+	return mac80211_minstrel.rate_init(priv, sband, sta, &msp->legacy);
+}
+
+static void
+minstrel_ht_rate_init(void *priv, struct ieee80211_supported_band *sband,
+                      struct ieee80211_sta *sta, void *priv_sta)
+{
+	minstrel_ht_update_caps(priv, sband, sta, priv_sta);
+}
+
+static void
+minstrel_ht_rate_update(void *priv, struct ieee80211_supported_band *sband,
+                        struct ieee80211_sta *sta, void *priv_sta,
+                        u32 changed)
+{
+	minstrel_ht_update_caps(priv, sband, sta, priv_sta);
+}
+
+static void *
+minstrel_ht_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
+{
+	struct ieee80211_supported_band *sband;
+	struct minstrel_ht_sta_priv *msp;
+	struct minstrel_priv *mp = priv;
+	struct ieee80211_hw *hw = mp->hw;
+	int max_rates = 0;
+	int i;
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+		sband = hw->wiphy->bands[i];
+		if (sband && sband->n_bitrates > max_rates)
+			max_rates = sband->n_bitrates;
+	}
+
+	msp = kzalloc(sizeof(*msp), gfp);
+	if (!msp)
+		return NULL;
+
+	msp->ratelist = kzalloc(sizeof(struct minstrel_rate) * max_rates, gfp);
+	if (!msp->ratelist)
+		goto error;
+
+	msp->sample_table = kmalloc(SAMPLE_COLUMNS * max_rates, gfp);
+	if (!msp->sample_table)
+		goto error1;
+
+	return msp;
+
+error1:
+	kfree(msp->ratelist);
+error:
+	kfree(msp);
+	return NULL;
+}
+
+static void
+minstrel_ht_free_sta(void *priv, struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct minstrel_ht_sta_priv *msp = priv_sta;
+
+	kfree(msp->sample_table);
+	kfree(msp->ratelist);
+	kfree(msp);
+}
+
+static void *
+minstrel_ht_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
+{
+	return mac80211_minstrel.alloc(hw, debugfsdir);
+}
+
+static void
+minstrel_ht_free(void *priv)
+{
+	mac80211_minstrel.free(priv);
+}
+
+static struct rate_control_ops mac80211_minstrel_ht = {
+	.name = "minstrel_ht",
+	.tx_status = minstrel_ht_tx_status,
+	.get_rate = minstrel_ht_get_rate,
+	.rate_init = minstrel_ht_rate_init,
+	.rate_update = minstrel_ht_rate_update,
+	.alloc_sta = minstrel_ht_alloc_sta,
+	.free_sta = minstrel_ht_free_sta,
+	.alloc = minstrel_ht_alloc,
+	.free = minstrel_ht_free,
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	.add_sta_debugfs = minstrel_ht_add_sta_debugfs,
+	.remove_sta_debugfs = minstrel_ht_remove_sta_debugfs,
+#endif
+};
+
+
+static void
+init_sample_table(void)
+{
+	int col, i, new_idx;
+	u8 rnd[MCS_GROUP_RATES];
+
+	memset(sample_table, 0xff, sizeof(sample_table));
+	for (col = 0; col < SAMPLE_COLUMNS; col++) {
+		for (i = 0; i < MCS_GROUP_RATES; i++) {
+			get_random_bytes(rnd, sizeof(rnd));
+			new_idx = (i + rnd[i]) % MCS_GROUP_RATES;
+
+			while (sample_table[col][new_idx] != 0xff)
+				new_idx = (new_idx + 1) % MCS_GROUP_RATES;
+
+			sample_table[col][new_idx] = i;
+		}
+	}
+}
+
+int __init
+rc80211_minstrel_ht_init(void)
+{
+	init_sample_table();
+	return ieee80211_rate_control_register(&mac80211_minstrel_ht);
+}
+
+void
+rc80211_minstrel_ht_exit(void)
+{
+	ieee80211_rate_control_unregister(&mac80211_minstrel_ht);
+}
diff --git a/net/mac80211/rc80211_minstrel_ht.h b/net/mac80211/rc80211_minstrel_ht.h
new file mode 100644
index 0000000..6dea374
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_ht.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __RC_MINSTREL_HT_H
+#define __RC_MINSTREL_HT_H
+
+/*
+ * The number of streams can be changed to 2 to reduce code
+ * size and memory footprint.
+ */
+#define MINSTREL_MAX_STREAMS	3
+#define MINSTREL_STREAM_GROUPS	4
+
+#define MCS_GROUP_RATES	8
+
+struct mcs_group {
+	u32 flags;
+	unsigned int streams;
+	unsigned int duration[MCS_GROUP_RATES];
+};
+
+extern const struct mcs_group minstrel_mcs_groups[];
+
+struct minstrel_rate_stats {
+	/* current / last sampling period attempts/success counters */
+	unsigned int attempts, last_attempts;
+	unsigned int success, last_success;
+
+	/* total attempts/success counters */
+	u64 att_hist, succ_hist;
+
+	/* current throughput */
+	unsigned int cur_tp;
+
+	/* packet delivery probabilities */
+	unsigned int cur_prob, probability;
+
+	/* maximum retry counts */
+	unsigned int retry_count;
+	unsigned int retry_count_rtscts;
+
+	bool retry_updated;
+	u8 sample_skipped;
+};
+
+struct minstrel_mcs_group_data {
+	u8 index;
+	u8 column;
+
+	/* bitfield of supported MCS rates of this group */
+	u8 supported;
+
+	/* selected primary rates */
+	unsigned int max_tp_rate;
+	unsigned int max_tp_rate2;
+	unsigned int max_prob_rate;
+
+	/* MCS rate statistics */
+	struct minstrel_rate_stats rates[MCS_GROUP_RATES];
+};
+
+struct minstrel_ht_sta {
+	struct ieee80211_sta *sta;
+
+	/* ampdu length (average, per sampling interval) */
+	unsigned int ampdu_len;
+	unsigned int ampdu_packets;
+
+	/* ampdu length (EWMA) */
+	unsigned int avg_ampdu_len;
+
+	/* best throughput rate */
+	unsigned int max_tp_rate;
+
+	/* second best throughput rate */
+	unsigned int max_tp_rate2;
+
+	/* best probability rate */
+	unsigned int max_prob_rate;
+	unsigned int max_prob_streams;
+
+	/* time of last status update */
+	unsigned long stats_update;
+
+	/* overhead time in usec for each frame */
+	unsigned int overhead;
+	unsigned int overhead_rtscts;
+
+	unsigned int total_packets;
+	unsigned int sample_packets;
+
+	/* tx flags to add for frames for this sta */
+	u32 tx_flags;
+
+	u8 sample_wait;
+	u8 sample_tries;
+	u8 sample_count;
+	u8 sample_slow;
+
+	/* current MCS group to be sampled */
+	u8 sample_group;
+
+	u8 cck_supported;
+	u8 cck_supported_short;
+
+	/* MCS rate group info and statistics */
+	struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS + 1];
+};
+
+struct minstrel_ht_sta_priv {
+	union {
+		struct minstrel_ht_sta ht;
+		struct minstrel_sta_info legacy;
+	};
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct dentry *dbg_stats;
+#endif
+	void *ratelist;
+	void *sample_table;
+	bool is_ht;
+};
+
+void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
+
+#endif
diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c
new file mode 100644
index 0000000..df44a5a
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/ieee80211.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "rc80211_minstrel.h"
+#include "rc80211_minstrel_ht.h"
+
+static char *
+minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
+{
+	unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
+	const struct mcs_group *mg;
+	unsigned int j, tp, prob, eprob;
+	char htmode = '2';
+	char gimode = 'L';
+
+	if (!mi->groups[i].supported)
+		return p;
+
+	mg = &minstrel_mcs_groups[i];
+	if (mg->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+		htmode = '4';
+	if (mg->flags & IEEE80211_TX_RC_SHORT_GI)
+		gimode = 'S';
+
+	for (j = 0; j < MCS_GROUP_RATES; j++) {
+		struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
+		static const int bitrates[4] = { 10, 20, 55, 110 };
+		int idx = i * MCS_GROUP_RATES + j;
+
+		if (!(mi->groups[i].supported & BIT(j)))
+			continue;
+
+		if (i == max_mcs)
+			p += sprintf(p, "CCK/%cP   ", j < 4 ? 'L' : 'S');
+		else
+			p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);
+
+		*(p++) = (idx == mi->max_tp_rate) ? 'T' : ' ';
+		*(p++) = (idx == mi->max_tp_rate2) ? 't' : ' ';
+		*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
+
+		if (i == max_mcs) {
+			int r = bitrates[j % 4];
+			p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
+		} else {
+			p += sprintf(p, " MCS%-2u", (mg->streams - 1) *
+					 MCS_GROUP_RATES + j);
+		}
+
+		tp = mr->cur_tp / 10;
+		prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
+		eprob = MINSTREL_TRUNC(mr->probability * 1000);
+
+		p += sprintf(p, "      %6u.%1u   %6u.%1u    %6u.%1u    "
+				"%3u            %3u(%3u)  %8llu    %8llu\n",
+				tp / 10, tp % 10,
+				eprob / 10, eprob % 10,
+				prob / 10, prob % 10,
+				mr->retry_count,
+				mr->last_success,
+				mr->last_attempts,
+				(unsigned long long)mr->succ_hist,
+				(unsigned long long)mr->att_hist);
+	}
+
+	return p;
+}
+
+static int
+minstrel_ht_stats_open(struct inode *inode, struct file *file)
+{
+	struct minstrel_ht_sta_priv *msp = inode->i_private;
+	struct minstrel_ht_sta *mi = &msp->ht;
+	struct minstrel_debugfs_info *ms;
+	unsigned int i;
+	unsigned int max_mcs = MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS;
+	char *p;
+	int ret;
+
+	if (!msp->is_ht) {
+		inode->i_private = &msp->legacy;
+		ret = minstrel_stats_open(inode, file);
+		inode->i_private = msp;
+		return ret;
+	}
+
+	ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL);
+	if (!ms)
+		return -ENOMEM;
+
+	file->private_data = ms;
+	p = ms->buf;
+	p += sprintf(p, "type         rate     throughput  ewma prob   this prob  "
+			"retry   this succ/attempt   success    attempts\n");
+
+	p = minstrel_ht_stats_dump(mi, max_mcs, p);
+	for (i = 0; i < max_mcs; i++)
+		p = minstrel_ht_stats_dump(mi, i, p);
+
+	p += sprintf(p, "\nTotal packet count::    ideal %d      "
+			"lookaround %d\n",
+			max(0, (int) mi->total_packets - (int) mi->sample_packets),
+			mi->sample_packets);
+	p += sprintf(p, "Average A-MPDU length: %d.%d\n",
+		MINSTREL_TRUNC(mi->avg_ampdu_len),
+		MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
+	ms->len = p - ms->buf;
+
+	return nonseekable_open(inode, file);
+}
+
+static const struct file_operations minstrel_ht_stat_fops = {
+	.owner = THIS_MODULE,
+	.open = minstrel_ht_stats_open,
+	.read = minstrel_stats_read,
+	.release = minstrel_stats_release,
+	.llseek = no_llseek,
+};
+
+void
+minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
+{
+	struct minstrel_ht_sta_priv *msp = priv_sta;
+
+	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
+			&minstrel_ht_stat_fops);
+}
+
+void
+minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
+{
+	struct minstrel_ht_sta_priv *msp = priv_sta;
+
+	debugfs_remove(msp->dbg_stats);
+}
diff --git a/net/mac80211/rc80211_pid.h b/net/mac80211/rc80211_pid.h
new file mode 100644
index 0000000..a254ebe
--- /dev/null
+++ b/net/mac80211/rc80211_pid.h
@@ -0,0 +1,278 @@
+/*
+ * Copyright 2007, Mattias Nissler <mattias.nissler@gmx.de>
+ * Copyright 2007, Stefano Brivio <stefano.brivio@polimi.it>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef RC80211_PID_H
+#define RC80211_PID_H
+
+/* Sampling period for measuring percentage of failed frames in ms. */
+#define RC_PID_INTERVAL			125
+
+/* Exponential averaging smoothness (used for I part of PID controller) */
+#define RC_PID_SMOOTHING_SHIFT		3
+#define RC_PID_SMOOTHING		(1 << RC_PID_SMOOTHING_SHIFT)
+
+/* Sharpening factor (used for D part of PID controller) */
+#define RC_PID_SHARPENING_FACTOR	0
+#define RC_PID_SHARPENING_DURATION	0
+
+/* Fixed point arithmetic shifting amount. */
+#define RC_PID_ARITH_SHIFT		8
+
+/* Proportional PID component coefficient. */
+#define RC_PID_COEFF_P			15
+/* Integral PID component coefficient. */
+#define RC_PID_COEFF_I			9
+/* Derivative PID component coefficient. */
+#define RC_PID_COEFF_D			15
+
+/* Target failed frames rate for the PID controller. NB: This effectively gives
+ * maximum failed frames percentage we're willing to accept. If the wireless
+ * link quality is good, the controller will fail to adjust failed frames
+ * percentage to the target. This is intentional.
+ */
+#define RC_PID_TARGET_PF		14
+
+/* Rate behaviour normalization quantity over time. */
+#define RC_PID_NORM_OFFSET		3
+
+/* Push high rates right after loading. */
+#define RC_PID_FAST_START		0
+
+/* Arithmetic right shift for positive and negative values for ISO C. */
+#define RC_PID_DO_ARITH_RIGHT_SHIFT(x, y) \
+	((x) < 0 ? -((-(x)) >> (y)) : (x) >> (y))
+
+enum rc_pid_event_type {
+	RC_PID_EVENT_TYPE_TX_STATUS,
+	RC_PID_EVENT_TYPE_RATE_CHANGE,
+	RC_PID_EVENT_TYPE_TX_RATE,
+	RC_PID_EVENT_TYPE_PF_SAMPLE,
+};
+
+union rc_pid_event_data {
+	/* RC_PID_EVENT_TX_STATUS */
+	struct {
+		u32 flags;
+		struct ieee80211_tx_info tx_status;
+	};
+	/* RC_PID_EVENT_TYPE_RATE_CHANGE */
+	/* RC_PID_EVENT_TYPE_TX_RATE */
+	struct {
+		int index;
+		int rate;
+	};
+	/* RC_PID_EVENT_TYPE_PF_SAMPLE */
+	struct {
+		s32 pf_sample;
+		s32 prop_err;
+		s32 int_err;
+		s32 der_err;
+	};
+};
+
+struct rc_pid_event {
+	/* The time when the event occurred */
+	unsigned long timestamp;
+
+	/* Event ID number */
+	unsigned int id;
+
+	/* Type of event */
+	enum rc_pid_event_type type;
+
+	/* type specific data */
+	union rc_pid_event_data data;
+};
+
+/* Size of the event ring buffer. */
+#define RC_PID_EVENT_RING_SIZE 32
+
+struct rc_pid_event_buffer {
+	/* Counter that generates event IDs */
+	unsigned int ev_count;
+
+	/* Ring buffer of events */
+	struct rc_pid_event ring[RC_PID_EVENT_RING_SIZE];
+
+	/* Index to the entry in events_buf to be reused */
+	unsigned int next_entry;
+
+	/* Lock that guards against concurrent access to this buffer struct */
+	spinlock_t lock;
+
+	/* Wait queue for poll/select and blocking I/O */
+	wait_queue_head_t waitqueue;
+};
+
+struct rc_pid_events_file_info {
+	/* The event buffer we read */
+	struct rc_pid_event_buffer *events;
+
+	/* The entry we have should read next */
+	unsigned int next_entry;
+};
+
+/**
+ * struct rc_pid_debugfs_entries - tunable parameters
+ *
+ * Algorithm parameters, tunable via debugfs.
+ * @target: target percentage for failed frames
+ * @sampling_period: error sampling interval in milliseconds
+ * @coeff_p: absolute value of the proportional coefficient
+ * @coeff_i: absolute value of the integral coefficient
+ * @coeff_d: absolute value of the derivative coefficient
+ * @smoothing_shift: absolute value of the integral smoothing factor (i.e.
+ *	amount of smoothing introduced by the exponential moving average)
+ * @sharpen_factor: absolute value of the derivative sharpening factor (i.e.
+ *	amount of emphasis given to the derivative term after low activity
+ *	events)
+ * @sharpen_duration: duration of the sharpening effect after the detected low
+ *	activity event, relative to sampling_period
+ * @norm_offset: amount of normalization periodically performed on the learnt
+ *	rate behaviour values (lower means we should trust more what we learnt
+ *	about behaviour of rates, higher means we should trust more the natural
+ *	ordering of rates)
+ */
+struct rc_pid_debugfs_entries {
+	struct dentry *target;
+	struct dentry *sampling_period;
+	struct dentry *coeff_p;
+	struct dentry *coeff_i;
+	struct dentry *coeff_d;
+	struct dentry *smoothing_shift;
+	struct dentry *sharpen_factor;
+	struct dentry *sharpen_duration;
+	struct dentry *norm_offset;
+};
+
+void rate_control_pid_event_tx_status(struct rc_pid_event_buffer *buf,
+				      struct ieee80211_tx_info *stat);
+
+void rate_control_pid_event_rate_change(struct rc_pid_event_buffer *buf,
+					       int index, int rate);
+
+void rate_control_pid_event_tx_rate(struct rc_pid_event_buffer *buf,
+					   int index, int rate);
+
+void rate_control_pid_event_pf_sample(struct rc_pid_event_buffer *buf,
+					     s32 pf_sample, s32 prop_err,
+					     s32 int_err, s32 der_err);
+
+void rate_control_pid_add_sta_debugfs(void *priv, void *priv_sta,
+					     struct dentry *dir);
+
+void rate_control_pid_remove_sta_debugfs(void *priv, void *priv_sta);
+
+struct rc_pid_sta_info {
+	unsigned long last_change;
+	unsigned long last_sample;
+
+	u32 tx_num_failed;
+	u32 tx_num_xmit;
+
+	int txrate_idx;
+
+	/* Average failed frames percentage error (i.e. actual vs. target
+	 * percentage), scaled by RC_PID_SMOOTHING. This value is computed
+	 * using using an exponential weighted average technique:
+	 *
+	 *           (RC_PID_SMOOTHING - 1) * err_avg_old + err
+	 * err_avg = ------------------------------------------
+	 *                       RC_PID_SMOOTHING
+	 *
+	 * where err_avg is the new approximation, err_avg_old the previous one
+	 * and err is the error w.r.t. to the current failed frames percentage
+	 * sample. Note that the bigger RC_PID_SMOOTHING the more weight is
+	 * given to the previous estimate, resulting in smoother behavior (i.e.
+	 * corresponding to a longer integration window).
+	 *
+	 * For computation, we actually don't use the above formula, but this
+	 * one:
+	 *
+	 * err_avg_scaled = err_avg_old_scaled - err_avg_old + err
+	 *
+	 * where:
+	 * 	err_avg_scaled = err * RC_PID_SMOOTHING
+	 * 	err_avg_old_scaled = err_avg_old * RC_PID_SMOOTHING
+	 *
+	 * This avoids floating point numbers and the per_failed_old value can
+	 * easily be obtained by shifting per_failed_old_scaled right by
+	 * RC_PID_SMOOTHING_SHIFT.
+	 */
+	s32 err_avg_sc;
+
+	/* Last framed failes percentage sample. */
+	u32 last_pf;
+
+	/* Sharpening needed. */
+	u8 sharp_cnt;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	/* Event buffer */
+	struct rc_pid_event_buffer events;
+
+	/* Events debugfs file entry */
+	struct dentry *events_entry;
+#endif
+};
+
+/* Algorithm parameters. We keep them on a per-algorithm approach, so they can
+ * be tuned individually for each interface.
+ */
+struct rc_pid_rateinfo {
+
+	/* Map sorted rates to rates in ieee80211_hw_mode. */
+	int index;
+
+	/* Map rates in ieee80211_hw_mode to sorted rates. */
+	int rev_index;
+
+	/* Did we do any measurement on this rate? */
+	bool valid;
+
+	/* Comparison with the lowest rate. */
+	int diff;
+};
+
+struct rc_pid_info {
+
+	/* The failed frames percentage target. */
+	unsigned int target;
+
+	/* Rate at which failed frames percentage is sampled in 0.001s. */
+	unsigned int sampling_period;
+
+	/* P, I and D coefficients. */
+	int coeff_p;
+	int coeff_i;
+	int coeff_d;
+
+	/* Exponential averaging shift. */
+	unsigned int smoothing_shift;
+
+	/* Sharpening factor and duration. */
+	unsigned int sharpen_factor;
+	unsigned int sharpen_duration;
+
+	/* Normalization offset. */
+	unsigned int norm_offset;
+
+	/* Rates information. */
+	struct rc_pid_rateinfo *rinfo;
+
+	/* Index of the last used rate. */
+	int oldrate;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	/* Debugfs entries created for the parameters above. */
+	struct rc_pid_debugfs_entries dentries;
+#endif
+};
+
+#endif /* RC80211_PID_H */
diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c
new file mode 100644
index 0000000..5134907
--- /dev/null
+++ b/net/mac80211/rc80211_pid_algo.c
@@ -0,0 +1,477 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2007, Mattias Nissler <mattias.nissler@gmx.de>
+ * Copyright 2007-2008, Stefano Brivio <stefano.brivio@polimi.it>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+#include <net/mac80211.h>
+#include "rate.h"
+#include "mesh.h"
+#include "rc80211_pid.h"
+
+
+/* This is an implementation of a TX rate control algorithm that uses a PID
+ * controller. Given a target failed frames rate, the controller decides about
+ * TX rate changes to meet the target failed frames rate.
+ *
+ * The controller basically computes the following:
+ *
+ * adj = CP * err + CI * err_avg + CD * (err - last_err) * (1 + sharpening)
+ *
+ * where
+ * 	adj	adjustment value that is used to switch TX rate (see below)
+ * 	err	current error: target vs. current failed frames percentage
+ * 	last_err	last error
+ * 	err_avg	average (i.e. poor man's integral) of recent errors
+ *	sharpening	non-zero when fast response is needed (i.e. right after
+ *			association or no frames sent for a long time), heading
+ * 			to zero over time
+ * 	CP	Proportional coefficient
+ * 	CI	Integral coefficient
+ * 	CD	Derivative coefficient
+ *
+ * CP, CI, CD are subject to careful tuning.
+ *
+ * The integral component uses a exponential moving average approach instead of
+ * an actual sliding window. The advantage is that we don't need to keep an
+ * array of the last N error values and computation is easier.
+ *
+ * Once we have the adj value, we map it to a rate by means of a learning
+ * algorithm. This algorithm keeps the state of the percentual failed frames
+ * difference between rates. The behaviour of the lowest available rate is kept
+ * as a reference value, and every time we switch between two rates, we compute
+ * the difference between the failed frames each rate exhibited. By doing so,
+ * we compare behaviours which different rates exhibited in adjacent timeslices,
+ * thus the comparison is minimally affected by external conditions. This
+ * difference gets propagated to the whole set of measurements, so that the
+ * reference is always the same. Periodically, we normalize this set so that
+ * recent events weigh the most. By comparing the adj value with this set, we
+ * avoid pejorative switches to lower rates and allow for switches to higher
+ * rates if they behaved well.
+ *
+ * Note that for the computations we use a fixed-point representation to avoid
+ * floating point arithmetic. Hence, all values are shifted left by
+ * RC_PID_ARITH_SHIFT.
+ */
+
+
+/* Adjust the rate while ensuring that we won't switch to a lower rate if it
+ * exhibited a worse failed frames behaviour and we'll choose the highest rate
+ * whose failed frames behaviour is not worse than the one of the original rate
+ * target. While at it, check that the new rate is valid. */
+static void rate_control_pid_adjust_rate(struct ieee80211_supported_band *sband,
+					 struct ieee80211_sta *sta,
+					 struct rc_pid_sta_info *spinfo, int adj,
+					 struct rc_pid_rateinfo *rinfo)
+{
+	int cur_sorted, new_sorted, probe, tmp, n_bitrates, band;
+	int cur = spinfo->txrate_idx;
+
+	band = sband->band;
+	n_bitrates = sband->n_bitrates;
+
+	/* Map passed arguments to sorted values. */
+	cur_sorted = rinfo[cur].rev_index;
+	new_sorted = cur_sorted + adj;
+
+	/* Check limits. */
+	if (new_sorted < 0)
+		new_sorted = rinfo[0].rev_index;
+	else if (new_sorted >= n_bitrates)
+		new_sorted = rinfo[n_bitrates - 1].rev_index;
+
+	tmp = new_sorted;
+
+	if (adj < 0) {
+		/* Ensure that the rate decrease isn't disadvantageous. */
+		for (probe = cur_sorted; probe >= new_sorted; probe--)
+			if (rinfo[probe].diff <= rinfo[cur_sorted].diff &&
+			    rate_supported(sta, band, rinfo[probe].index))
+				tmp = probe;
+	} else {
+		/* Look for rate increase with zero (or below) cost. */
+		for (probe = new_sorted + 1; probe < n_bitrates; probe++)
+			if (rinfo[probe].diff <= rinfo[new_sorted].diff &&
+			    rate_supported(sta, band, rinfo[probe].index))
+				tmp = probe;
+	}
+
+	/* Fit the rate found to the nearest supported rate. */
+	do {
+		if (rate_supported(sta, band, rinfo[tmp].index)) {
+			spinfo->txrate_idx = rinfo[tmp].index;
+			break;
+		}
+		if (adj < 0)
+			tmp--;
+		else
+			tmp++;
+	} while (tmp < n_bitrates && tmp >= 0);
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	rate_control_pid_event_rate_change(&spinfo->events,
+		spinfo->txrate_idx,
+		sband->bitrates[spinfo->txrate_idx].bitrate);
+#endif
+}
+
+/* Normalize the failed frames per-rate differences. */
+static void rate_control_pid_normalize(struct rc_pid_info *pinfo, int l)
+{
+	int i, norm_offset = pinfo->norm_offset;
+	struct rc_pid_rateinfo *r = pinfo->rinfo;
+
+	if (r[0].diff > norm_offset)
+		r[0].diff -= norm_offset;
+	else if (r[0].diff < -norm_offset)
+		r[0].diff += norm_offset;
+	for (i = 0; i < l - 1; i++)
+		if (r[i + 1].diff > r[i].diff + norm_offset)
+			r[i + 1].diff -= norm_offset;
+		else if (r[i + 1].diff <= r[i].diff)
+			r[i + 1].diff += norm_offset;
+}
+
+static void rate_control_pid_sample(struct rc_pid_info *pinfo,
+				    struct ieee80211_supported_band *sband,
+				    struct ieee80211_sta *sta,
+				    struct rc_pid_sta_info *spinfo)
+{
+	struct rc_pid_rateinfo *rinfo = pinfo->rinfo;
+	u32 pf;
+	s32 err_avg;
+	u32 err_prop;
+	u32 err_int;
+	u32 err_der;
+	int adj, i, j, tmp;
+	unsigned long period;
+
+	/* In case nothing happened during the previous control interval, turn
+	 * the sharpening factor on. */
+	period = msecs_to_jiffies(pinfo->sampling_period);
+	if (jiffies - spinfo->last_sample > 2 * period)
+		spinfo->sharp_cnt = pinfo->sharpen_duration;
+
+	spinfo->last_sample = jiffies;
+
+	/* This should never happen, but in case, we assume the old sample is
+	 * still a good measurement and copy it. */
+	if (unlikely(spinfo->tx_num_xmit == 0))
+		pf = spinfo->last_pf;
+	else
+		pf = spinfo->tx_num_failed * 100 / spinfo->tx_num_xmit;
+
+	spinfo->tx_num_xmit = 0;
+	spinfo->tx_num_failed = 0;
+
+	/* If we just switched rate, update the rate behaviour info. */
+	if (pinfo->oldrate != spinfo->txrate_idx) {
+
+		i = rinfo[pinfo->oldrate].rev_index;
+		j = rinfo[spinfo->txrate_idx].rev_index;
+
+		tmp = (pf - spinfo->last_pf);
+		tmp = RC_PID_DO_ARITH_RIGHT_SHIFT(tmp, RC_PID_ARITH_SHIFT);
+
+		rinfo[j].diff = rinfo[i].diff + tmp;
+		pinfo->oldrate = spinfo->txrate_idx;
+	}
+	rate_control_pid_normalize(pinfo, sband->n_bitrates);
+
+	/* Compute the proportional, integral and derivative errors. */
+	err_prop = (pinfo->target - pf) << RC_PID_ARITH_SHIFT;
+
+	err_avg = spinfo->err_avg_sc >> pinfo->smoothing_shift;
+	spinfo->err_avg_sc = spinfo->err_avg_sc - err_avg + err_prop;
+	err_int = spinfo->err_avg_sc >> pinfo->smoothing_shift;
+
+	err_der = (pf - spinfo->last_pf) *
+		  (1 + pinfo->sharpen_factor * spinfo->sharp_cnt);
+	spinfo->last_pf = pf;
+	if (spinfo->sharp_cnt)
+			spinfo->sharp_cnt--;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	rate_control_pid_event_pf_sample(&spinfo->events, pf, err_prop, err_int,
+					 err_der);
+#endif
+
+	/* Compute the controller output. */
+	adj = (err_prop * pinfo->coeff_p + err_int * pinfo->coeff_i
+	      + err_der * pinfo->coeff_d);
+	adj = RC_PID_DO_ARITH_RIGHT_SHIFT(adj, 2 * RC_PID_ARITH_SHIFT);
+
+	/* Change rate. */
+	if (adj)
+		rate_control_pid_adjust_rate(sband, sta, spinfo, adj, rinfo);
+}
+
+static void rate_control_pid_tx_status(void *priv, struct ieee80211_supported_band *sband,
+				       struct ieee80211_sta *sta, void *priv_sta,
+				       struct sk_buff *skb)
+{
+	struct rc_pid_info *pinfo = priv;
+	struct rc_pid_sta_info *spinfo = priv_sta;
+	unsigned long period;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+	if (!spinfo)
+		return;
+
+	/* Ignore all frames that were sent with a different rate than the rate
+	 * we currently advise mac80211 to use. */
+	if (info->status.rates[0].idx != spinfo->txrate_idx)
+		return;
+
+	spinfo->tx_num_xmit++;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	rate_control_pid_event_tx_status(&spinfo->events, info);
+#endif
+
+	/* We count frames that totally failed to be transmitted as two bad
+	 * frames, those that made it out but had some retries as one good and
+	 * one bad frame. */
+	if (!(info->flags & IEEE80211_TX_STAT_ACK)) {
+		spinfo->tx_num_failed += 2;
+		spinfo->tx_num_xmit++;
+	} else if (info->status.rates[0].count > 1) {
+		spinfo->tx_num_failed++;
+		spinfo->tx_num_xmit++;
+	}
+
+	/* Update PID controller state. */
+	period = msecs_to_jiffies(pinfo->sampling_period);
+	if (time_after(jiffies, spinfo->last_sample + period))
+		rate_control_pid_sample(pinfo, sband, sta, spinfo);
+}
+
+static void
+rate_control_pid_get_rate(void *priv, struct ieee80211_sta *sta,
+			  void *priv_sta,
+			  struct ieee80211_tx_rate_control *txrc)
+{
+	struct sk_buff *skb = txrc->skb;
+	struct ieee80211_supported_band *sband = txrc->sband;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct rc_pid_sta_info *spinfo = priv_sta;
+	int rateidx;
+
+	if (txrc->rts)
+		info->control.rates[0].count =
+			txrc->hw->conf.long_frame_max_tx_count;
+	else
+		info->control.rates[0].count =
+			txrc->hw->conf.short_frame_max_tx_count;
+
+	/* Send management frames and NO_ACK data using lowest rate. */
+	if (rate_control_send_low(sta, priv_sta, txrc))
+		return;
+
+	rateidx = spinfo->txrate_idx;
+
+	if (rateidx >= sband->n_bitrates)
+		rateidx = sband->n_bitrates - 1;
+
+	info->control.rates[0].idx = rateidx;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	rate_control_pid_event_tx_rate(&spinfo->events,
+		rateidx, sband->bitrates[rateidx].bitrate);
+#endif
+}
+
+static void
+rate_control_pid_rate_init(void *priv, struct ieee80211_supported_band *sband,
+			   struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct rc_pid_sta_info *spinfo = priv_sta;
+	struct rc_pid_info *pinfo = priv;
+	struct rc_pid_rateinfo *rinfo = pinfo->rinfo;
+	int i, j, tmp;
+	bool s;
+
+	/* TODO: This routine should consider using RSSI from previous packets
+	 * as we need to have IEEE 802.1X auth succeed immediately after assoc..
+	 * Until that method is implemented, we will use the lowest supported
+	 * rate as a workaround. */
+
+	/* Sort the rates. This is optimized for the most common case (i.e.
+	 * almost-sorted CCK+OFDM rates). Kind of bubble-sort with reversed
+	 * mapping too. */
+	for (i = 0; i < sband->n_bitrates; i++) {
+		rinfo[i].index = i;
+		rinfo[i].rev_index = i;
+		if (RC_PID_FAST_START)
+			rinfo[i].diff = 0;
+		else
+			rinfo[i].diff = i * pinfo->norm_offset;
+	}
+	for (i = 1; i < sband->n_bitrates; i++) {
+		s = false;
+		for (j = 0; j < sband->n_bitrates - i; j++)
+			if (unlikely(sband->bitrates[rinfo[j].index].bitrate >
+				     sband->bitrates[rinfo[j + 1].index].bitrate)) {
+				tmp = rinfo[j].index;
+				rinfo[j].index = rinfo[j + 1].index;
+				rinfo[j + 1].index = tmp;
+				rinfo[rinfo[j].index].rev_index = j;
+				rinfo[rinfo[j + 1].index].rev_index = j + 1;
+				s = true;
+			}
+		if (!s)
+			break;
+	}
+
+	spinfo->txrate_idx = rate_lowest_index(sband, sta);
+}
+
+static void *rate_control_pid_alloc(struct ieee80211_hw *hw,
+				    struct dentry *debugfsdir)
+{
+	struct rc_pid_info *pinfo;
+	struct rc_pid_rateinfo *rinfo;
+	struct ieee80211_supported_band *sband;
+	int i, max_rates = 0;
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct rc_pid_debugfs_entries *de;
+#endif
+
+	pinfo = kmalloc(sizeof(*pinfo), GFP_ATOMIC);
+	if (!pinfo)
+		return NULL;
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+		sband = hw->wiphy->bands[i];
+		if (sband && sband->n_bitrates > max_rates)
+			max_rates = sband->n_bitrates;
+	}
+
+	rinfo = kmalloc(sizeof(*rinfo) * max_rates, GFP_ATOMIC);
+	if (!rinfo) {
+		kfree(pinfo);
+		return NULL;
+	}
+
+	pinfo->target = RC_PID_TARGET_PF;
+	pinfo->sampling_period = RC_PID_INTERVAL;
+	pinfo->coeff_p = RC_PID_COEFF_P;
+	pinfo->coeff_i = RC_PID_COEFF_I;
+	pinfo->coeff_d = RC_PID_COEFF_D;
+	pinfo->smoothing_shift = RC_PID_SMOOTHING_SHIFT;
+	pinfo->sharpen_factor = RC_PID_SHARPENING_FACTOR;
+	pinfo->sharpen_duration = RC_PID_SHARPENING_DURATION;
+	pinfo->norm_offset = RC_PID_NORM_OFFSET;
+	pinfo->rinfo = rinfo;
+	pinfo->oldrate = 0;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	de = &pinfo->dentries;
+	de->target = debugfs_create_u32("target_pf", S_IRUSR | S_IWUSR,
+					debugfsdir, &pinfo->target);
+	de->sampling_period = debugfs_create_u32("sampling_period",
+						 S_IRUSR | S_IWUSR, debugfsdir,
+						 &pinfo->sampling_period);
+	de->coeff_p = debugfs_create_u32("coeff_p", S_IRUSR | S_IWUSR,
+					 debugfsdir, (u32 *)&pinfo->coeff_p);
+	de->coeff_i = debugfs_create_u32("coeff_i", S_IRUSR | S_IWUSR,
+					 debugfsdir, (u32 *)&pinfo->coeff_i);
+	de->coeff_d = debugfs_create_u32("coeff_d", S_IRUSR | S_IWUSR,
+					 debugfsdir, (u32 *)&pinfo->coeff_d);
+	de->smoothing_shift = debugfs_create_u32("smoothing_shift",
+						 S_IRUSR | S_IWUSR, debugfsdir,
+						 &pinfo->smoothing_shift);
+	de->sharpen_factor = debugfs_create_u32("sharpen_factor",
+					       S_IRUSR | S_IWUSR, debugfsdir,
+					       &pinfo->sharpen_factor);
+	de->sharpen_duration = debugfs_create_u32("sharpen_duration",
+						  S_IRUSR | S_IWUSR, debugfsdir,
+						  &pinfo->sharpen_duration);
+	de->norm_offset = debugfs_create_u32("norm_offset",
+					     S_IRUSR | S_IWUSR, debugfsdir,
+					     &pinfo->norm_offset);
+#endif
+
+	return pinfo;
+}
+
+static void rate_control_pid_free(void *priv)
+{
+	struct rc_pid_info *pinfo = priv;
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct rc_pid_debugfs_entries *de = &pinfo->dentries;
+
+	debugfs_remove(de->norm_offset);
+	debugfs_remove(de->sharpen_duration);
+	debugfs_remove(de->sharpen_factor);
+	debugfs_remove(de->smoothing_shift);
+	debugfs_remove(de->coeff_d);
+	debugfs_remove(de->coeff_i);
+	debugfs_remove(de->coeff_p);
+	debugfs_remove(de->sampling_period);
+	debugfs_remove(de->target);
+#endif
+
+	kfree(pinfo->rinfo);
+	kfree(pinfo);
+}
+
+static void *rate_control_pid_alloc_sta(void *priv, struct ieee80211_sta *sta,
+					gfp_t gfp)
+{
+	struct rc_pid_sta_info *spinfo;
+
+	spinfo = kzalloc(sizeof(*spinfo), gfp);
+	if (spinfo == NULL)
+		return NULL;
+
+	spinfo->last_sample = jiffies;
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	spin_lock_init(&spinfo->events.lock);
+	init_waitqueue_head(&spinfo->events.waitqueue);
+#endif
+
+	return spinfo;
+}
+
+static void rate_control_pid_free_sta(void *priv, struct ieee80211_sta *sta,
+				      void *priv_sta)
+{
+	kfree(priv_sta);
+}
+
+static struct rate_control_ops mac80211_rcpid = {
+	.name = "pid",
+	.tx_status = rate_control_pid_tx_status,
+	.get_rate = rate_control_pid_get_rate,
+	.rate_init = rate_control_pid_rate_init,
+	.alloc = rate_control_pid_alloc,
+	.free = rate_control_pid_free,
+	.alloc_sta = rate_control_pid_alloc_sta,
+	.free_sta = rate_control_pid_free_sta,
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	.add_sta_debugfs = rate_control_pid_add_sta_debugfs,
+	.remove_sta_debugfs = rate_control_pid_remove_sta_debugfs,
+#endif
+};
+
+int __init rc80211_pid_init(void)
+{
+	return ieee80211_rate_control_register(&mac80211_rcpid);
+}
+
+void rc80211_pid_exit(void)
+{
+	ieee80211_rate_control_unregister(&mac80211_rcpid);
+}
diff --git a/net/mac80211/rc80211_pid_debugfs.c b/net/mac80211/rc80211_pid_debugfs.c
new file mode 100644
index 0000000..c97a065
--- /dev/null
+++ b/net/mac80211/rc80211_pid_debugfs.c
@@ -0,0 +1,228 @@
+/*
+ * Copyright 2007, Mattias Nissler <mattias.nissler@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/poll.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+
+#include <net/mac80211.h>
+#include "rate.h"
+
+#include "rc80211_pid.h"
+
+static void rate_control_pid_event(struct rc_pid_event_buffer *buf,
+				   enum rc_pid_event_type type,
+				   union rc_pid_event_data *data)
+{
+	struct rc_pid_event *ev;
+	unsigned long status;
+
+	spin_lock_irqsave(&buf->lock, status);
+	ev = &(buf->ring[buf->next_entry]);
+	buf->next_entry = (buf->next_entry + 1) % RC_PID_EVENT_RING_SIZE;
+
+	ev->timestamp = jiffies;
+	ev->id = buf->ev_count++;
+	ev->type = type;
+	ev->data = *data;
+
+	spin_unlock_irqrestore(&buf->lock, status);
+
+	wake_up_all(&buf->waitqueue);
+}
+
+void rate_control_pid_event_tx_status(struct rc_pid_event_buffer *buf,
+				      struct ieee80211_tx_info *stat)
+{
+	union rc_pid_event_data evd;
+
+	evd.flags = stat->flags;
+	memcpy(&evd.tx_status, stat, sizeof(struct ieee80211_tx_info));
+	rate_control_pid_event(buf, RC_PID_EVENT_TYPE_TX_STATUS, &evd);
+}
+
+void rate_control_pid_event_rate_change(struct rc_pid_event_buffer *buf,
+					       int index, int rate)
+{
+	union rc_pid_event_data evd;
+
+	evd.index = index;
+	evd.rate = rate;
+	rate_control_pid_event(buf, RC_PID_EVENT_TYPE_RATE_CHANGE, &evd);
+}
+
+void rate_control_pid_event_tx_rate(struct rc_pid_event_buffer *buf,
+					   int index, int rate)
+{
+	union rc_pid_event_data evd;
+
+	evd.index = index;
+	evd.rate = rate;
+	rate_control_pid_event(buf, RC_PID_EVENT_TYPE_TX_RATE, &evd);
+}
+
+void rate_control_pid_event_pf_sample(struct rc_pid_event_buffer *buf,
+					     s32 pf_sample, s32 prop_err,
+					     s32 int_err, s32 der_err)
+{
+	union rc_pid_event_data evd;
+
+	evd.pf_sample = pf_sample;
+	evd.prop_err = prop_err;
+	evd.int_err = int_err;
+	evd.der_err = der_err;
+	rate_control_pid_event(buf, RC_PID_EVENT_TYPE_PF_SAMPLE, &evd);
+}
+
+static int rate_control_pid_events_open(struct inode *inode, struct file *file)
+{
+	struct rc_pid_sta_info *sinfo = inode->i_private;
+	struct rc_pid_event_buffer *events = &sinfo->events;
+	struct rc_pid_events_file_info *file_info;
+	unsigned long status;
+
+	/* Allocate a state struct */
+	file_info = kmalloc(sizeof(*file_info), GFP_KERNEL);
+	if (file_info == NULL)
+		return -ENOMEM;
+
+	spin_lock_irqsave(&events->lock, status);
+
+	file_info->next_entry = events->next_entry;
+	file_info->events = events;
+
+	spin_unlock_irqrestore(&events->lock, status);
+
+	file->private_data = file_info;
+
+	return 0;
+}
+
+static int rate_control_pid_events_release(struct inode *inode,
+					   struct file *file)
+{
+	struct rc_pid_events_file_info *file_info = file->private_data;
+
+	kfree(file_info);
+
+	return 0;
+}
+
+static unsigned int rate_control_pid_events_poll(struct file *file,
+						 poll_table *wait)
+{
+	struct rc_pid_events_file_info *file_info = file->private_data;
+
+	poll_wait(file, &file_info->events->waitqueue, wait);
+
+	return POLLIN | POLLRDNORM;
+}
+
+#define RC_PID_PRINT_BUF_SIZE 64
+
+static ssize_t rate_control_pid_events_read(struct file *file, char __user *buf,
+					    size_t length, loff_t *offset)
+{
+	struct rc_pid_events_file_info *file_info = file->private_data;
+	struct rc_pid_event_buffer *events = file_info->events;
+	struct rc_pid_event *ev;
+	char pb[RC_PID_PRINT_BUF_SIZE];
+	int ret;
+	int p;
+	unsigned long status;
+
+	/* Check if there is something to read. */
+	if (events->next_entry == file_info->next_entry) {
+		if (file->f_flags & O_NONBLOCK)
+			return -EAGAIN;
+
+		/* Wait */
+		ret = wait_event_interruptible(events->waitqueue,
+				events->next_entry != file_info->next_entry);
+
+		if (ret)
+			return ret;
+	}
+
+	/* Write out one event per call. I don't care whether it's a little
+	 * inefficient, this is debugging code anyway. */
+	spin_lock_irqsave(&events->lock, status);
+
+	/* Get an event */
+	ev = &(events->ring[file_info->next_entry]);
+	file_info->next_entry = (file_info->next_entry + 1) %
+				RC_PID_EVENT_RING_SIZE;
+
+	/* Print information about the event. Note that userspace needs to
+	 * provide large enough buffers. */
+	length = length < RC_PID_PRINT_BUF_SIZE ?
+		 length : RC_PID_PRINT_BUF_SIZE;
+	p = snprintf(pb, length, "%u %lu ", ev->id, ev->timestamp);
+	switch (ev->type) {
+	case RC_PID_EVENT_TYPE_TX_STATUS:
+		p += snprintf(pb + p, length - p, "tx_status %u %u",
+			      !(ev->data.flags & IEEE80211_TX_STAT_ACK),
+			      ev->data.tx_status.status.rates[0].idx);
+		break;
+	case RC_PID_EVENT_TYPE_RATE_CHANGE:
+		p += snprintf(pb + p, length - p, "rate_change %d %d",
+			      ev->data.index, ev->data.rate);
+		break;
+	case RC_PID_EVENT_TYPE_TX_RATE:
+		p += snprintf(pb + p, length - p, "tx_rate %d %d",
+			      ev->data.index, ev->data.rate);
+		break;
+	case RC_PID_EVENT_TYPE_PF_SAMPLE:
+		p += snprintf(pb + p, length - p,
+			      "pf_sample %d %d %d %d",
+			      ev->data.pf_sample, ev->data.prop_err,
+			      ev->data.int_err, ev->data.der_err);
+		break;
+	}
+	p += snprintf(pb + p, length - p, "\n");
+
+	spin_unlock_irqrestore(&events->lock, status);
+
+	if (copy_to_user(buf, pb, p))
+		return -EFAULT;
+
+	return p;
+}
+
+#undef RC_PID_PRINT_BUF_SIZE
+
+static const struct file_operations rc_pid_fop_events = {
+	.owner = THIS_MODULE,
+	.read = rate_control_pid_events_read,
+	.poll = rate_control_pid_events_poll,
+	.open = rate_control_pid_events_open,
+	.release = rate_control_pid_events_release,
+	.llseek = noop_llseek,
+};
+
+void rate_control_pid_add_sta_debugfs(void *priv, void *priv_sta,
+					     struct dentry *dir)
+{
+	struct rc_pid_sta_info *spinfo = priv_sta;
+
+	spinfo->events_entry = debugfs_create_file("rc_pid_events", S_IRUGO,
+						   dir, spinfo,
+						   &rc_pid_fop_events);
+}
+
+void rate_control_pid_remove_sta_debugfs(void *priv, void *priv_sta)
+{
+	struct rc_pid_sta_info *spinfo = priv_sta;
+
+	debugfs_remove(spinfo->events_entry);
+}
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
new file mode 100644
index 0000000..b3bb649
--- /dev/null
+++ b/net/mac80211/rx.c
@@ -0,0 +1,3360 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007-2010	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/jiffies.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/rcupdate.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include <net/ieee80211_radiotap.h>
+#include <asm/unaligned.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "led.h"
+#include "mesh.h"
+#include "wep.h"
+#include "wpa.h"
+#include "tkip.h"
+#include "wme.h"
+#include "rate.h"
+
+/*
+ * monitor mode reception
+ *
+ * This function cleans up the SKB, i.e. it removes all the stuff
+ * only useful for monitoring.
+ */
+static struct sk_buff *remove_monitor_info(struct ieee80211_local *local,
+					   struct sk_buff *skb)
+{
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+
+	if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) {
+		if (likely(skb->len > FCS_LEN))
+			__pskb_trim(skb, skb->len - FCS_LEN);
+		else {
+			/* driver bug */
+			WARN_ON(1);
+			dev_kfree_skb(skb);
+			return NULL;
+		}
+	}
+
+	if (status->vendor_radiotap_len)
+		__pskb_pull(skb, status->vendor_radiotap_len);
+
+	return skb;
+}
+
+static inline int should_drop_frame(struct sk_buff *skb, int present_fcs_len)
+{
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_hdr *hdr;
+
+	hdr = (void *)(skb->data + status->vendor_radiotap_len);
+
+	if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
+			    RX_FLAG_FAILED_PLCP_CRC |
+			    RX_FLAG_AMPDU_IS_ZEROLEN))
+		return 1;
+	if (unlikely(skb->len < 16 + present_fcs_len +
+				status->vendor_radiotap_len))
+		return 1;
+	if (ieee80211_is_ctl(hdr->frame_control) &&
+	    !ieee80211_is_pspoll(hdr->frame_control) &&
+	    !ieee80211_is_back_req(hdr->frame_control))
+		return 1;
+	return 0;
+}
+
+static int
+ieee80211_rx_radiotap_space(struct ieee80211_local *local,
+			    struct ieee80211_rx_status *status)
+{
+	int len;
+
+	/* always present fields */
+	len = sizeof(struct ieee80211_radiotap_header) + 9;
+
+	/* allocate extra bitmap */
+	if (status->vendor_radiotap_len)
+		len += 4;
+
+	if (ieee80211_have_rx_timestamp(status)) {
+		len = ALIGN(len, 8);
+		len += 8;
+	}
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+		len += 1;
+
+	/* padding for RX_FLAGS if necessary */
+	len = ALIGN(len, 2);
+
+	if (status->flag & RX_FLAG_HT) /* HT info */
+		len += 3;
+
+	if (status->flag & RX_FLAG_AMPDU_DETAILS) {
+		len = ALIGN(len, 4);
+		len += 8;
+	}
+
+	if (status->flag & RX_FLAG_VHT) {
+		len = ALIGN(len, 2);
+		len += 12;
+	}
+
+	if (status->vendor_radiotap_len) {
+		if (WARN_ON_ONCE(status->vendor_radiotap_align == 0))
+			status->vendor_radiotap_align = 1;
+		/* align standard part of vendor namespace */
+		len = ALIGN(len, 2);
+		/* allocate standard part of vendor namespace */
+		len += 6;
+		/* align vendor-defined part */
+		len = ALIGN(len, status->vendor_radiotap_align);
+		/* vendor-defined part is already in skb */
+	}
+
+	return len;
+}
+
+/*
+ * ieee80211_add_rx_radiotap_header - add radiotap header
+ *
+ * add a radiotap header containing all the fields which the hardware provided.
+ */
+static void
+ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
+				 struct sk_buff *skb,
+				 struct ieee80211_rate *rate,
+				 int rtap_len, bool has_fcs)
+{
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_radiotap_header *rthdr;
+	unsigned char *pos;
+	u16 rx_flags = 0;
+	int mpdulen;
+
+	mpdulen = skb->len;
+	if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)))
+		mpdulen += FCS_LEN;
+
+	rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len);
+	memset(rthdr, 0, rtap_len);
+
+	/* radiotap header, set always present flags */
+	rthdr->it_present =
+		cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
+			    (1 << IEEE80211_RADIOTAP_CHANNEL) |
+			    (1 << IEEE80211_RADIOTAP_ANTENNA) |
+			    (1 << IEEE80211_RADIOTAP_RX_FLAGS));
+	rthdr->it_len = cpu_to_le16(rtap_len + status->vendor_radiotap_len);
+
+	pos = (unsigned char *)(rthdr + 1);
+
+	if (status->vendor_radiotap_len) {
+		rthdr->it_present |=
+			cpu_to_le32(BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE)) |
+			cpu_to_le32(BIT(IEEE80211_RADIOTAP_EXT));
+		put_unaligned_le32(status->vendor_radiotap_bitmap, pos);
+		pos += 4;
+	}
+
+	/* the order of the following fields is important */
+
+	/* IEEE80211_RADIOTAP_TSFT */
+	if (ieee80211_have_rx_timestamp(status)) {
+		/* padding */
+		while ((pos - (u8 *)rthdr) & 7)
+			*pos++ = 0;
+		put_unaligned_le64(
+			ieee80211_calculate_rx_timestamp(local, status,
+							 mpdulen, 0),
+			pos);
+		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
+		pos += 8;
+	}
+
+	/* IEEE80211_RADIOTAP_FLAGS */
+	if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))
+		*pos |= IEEE80211_RADIOTAP_F_FCS;
+	if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
+		*pos |= IEEE80211_RADIOTAP_F_BADFCS;
+	if (status->flag & RX_FLAG_SHORTPRE)
+		*pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
+	pos++;
+
+	/* IEEE80211_RADIOTAP_RATE */
+	if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) {
+		/*
+		 * Without rate information don't add it. If we have,
+		 * MCS information is a separate field in radiotap,
+		 * added below. The byte here is needed as padding
+		 * for the channel though, so initialise it to 0.
+		 */
+		*pos = 0;
+	} else {
+		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
+		*pos = rate->bitrate / 5;
+	}
+	pos++;
+
+	/* IEEE80211_RADIOTAP_CHANNEL */
+	put_unaligned_le16(status->freq, pos);
+	pos += 2;
+	if (status->band == IEEE80211_BAND_5GHZ)
+		put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ,
+				   pos);
+	else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT))
+		put_unaligned_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ,
+				   pos);
+	else if (rate && rate->flags & IEEE80211_RATE_ERP_G)
+		put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
+				   pos);
+	else if (rate)
+		put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
+				   pos);
+	else
+		put_unaligned_le16(IEEE80211_CHAN_2GHZ, pos);
+	pos += 2;
+
+	/* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM &&
+	    !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
+		*pos = status->signal;
+		rthdr->it_present |=
+			cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
+		pos++;
+	}
+
+	/* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
+
+	/* IEEE80211_RADIOTAP_ANTENNA */
+	*pos = status->antenna;
+	pos++;
+
+	/* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
+
+	/* IEEE80211_RADIOTAP_RX_FLAGS */
+	/* ensure 2 byte alignment for the 2 byte field as required */
+	if ((pos - (u8 *)rthdr) & 1)
+		*pos++ = 0;
+	if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
+		rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
+	put_unaligned_le16(rx_flags, pos);
+	pos += 2;
+
+	if (status->flag & RX_FLAG_HT) {
+		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
+		*pos++ = local->hw.radiotap_mcs_details;
+		*pos = 0;
+		if (status->flag & RX_FLAG_SHORT_GI)
+			*pos |= IEEE80211_RADIOTAP_MCS_SGI;
+		if (status->flag & RX_FLAG_40MHZ)
+			*pos |= IEEE80211_RADIOTAP_MCS_BW_40;
+		if (status->flag & RX_FLAG_HT_GF)
+			*pos |= IEEE80211_RADIOTAP_MCS_FMT_GF;
+		pos++;
+		*pos++ = status->rate_idx;
+	}
+
+	if (status->flag & RX_FLAG_AMPDU_DETAILS) {
+		u16 flags = 0;
+
+		/* ensure 4 byte alignment */
+		while ((pos - (u8 *)rthdr) & 3)
+			pos++;
+		rthdr->it_present |=
+			cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS);
+		put_unaligned_le32(status->ampdu_reference, pos);
+		pos += 4;
+		if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN)
+			flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN;
+		if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN)
+			flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN;
+		if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN)
+			flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN;
+		if (status->flag & RX_FLAG_AMPDU_IS_LAST)
+			flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST;
+		if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR)
+			flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR;
+		if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
+			flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN;
+		put_unaligned_le16(flags, pos);
+		pos += 2;
+		if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
+			*pos++ = status->ampdu_delimiter_crc;
+		else
+			*pos++ = 0;
+		*pos++ = 0;
+	}
+
+	if (status->flag & RX_FLAG_VHT) {
+		u16 known = local->hw.radiotap_vht_details;
+
+		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
+		/* known field - how to handle 80+80? */
+		if (status->flag & RX_FLAG_80P80MHZ)
+			known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
+		put_unaligned_le16(known, pos);
+		pos += 2;
+		/* flags */
+		if (status->flag & RX_FLAG_SHORT_GI)
+			*pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
+		pos++;
+		/* bandwidth */
+		if (status->flag & RX_FLAG_80MHZ)
+			*pos++ = 4;
+		else if (status->flag & RX_FLAG_80P80MHZ)
+			*pos++ = 0; /* marked not known above */
+		else if (status->flag & RX_FLAG_160MHZ)
+			*pos++ = 11;
+		else if (status->flag & RX_FLAG_40MHZ)
+			*pos++ = 1;
+		else /* 20 MHz */
+			*pos++ = 0;
+		/* MCS/NSS */
+		*pos = (status->rate_idx << 4) | status->vht_nss;
+		pos += 4;
+		/* coding field */
+		pos++;
+		/* group ID */
+		pos++;
+		/* partial_aid */
+		pos += 2;
+	}
+
+	if (status->vendor_radiotap_len) {
+		/* ensure 2 byte alignment for the vendor field as required */
+		if ((pos - (u8 *)rthdr) & 1)
+			*pos++ = 0;
+		*pos++ = status->vendor_radiotap_oui[0];
+		*pos++ = status->vendor_radiotap_oui[1];
+		*pos++ = status->vendor_radiotap_oui[2];
+		*pos++ = status->vendor_radiotap_subns;
+		put_unaligned_le16(status->vendor_radiotap_len, pos);
+		pos += 2;
+		/* align the actual payload as requested */
+		while ((pos - (u8 *)rthdr) & (status->vendor_radiotap_align - 1))
+			*pos++ = 0;
+	}
+}
+
+/*
+ * This function copies a received frame to all monitor interfaces and
+ * returns a cleaned-up SKB that no longer includes the FCS nor the
+ * radiotap header the driver might have added.
+ */
+static struct sk_buff *
+ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
+		     struct ieee80211_rate *rate)
+{
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb);
+	struct ieee80211_sub_if_data *sdata;
+	int needed_headroom;
+	struct sk_buff *skb, *skb2;
+	struct net_device *prev_dev = NULL;
+	int present_fcs_len = 0;
+
+	/*
+	 * First, we may need to make a copy of the skb because
+	 *  (1) we need to modify it for radiotap (if not present), and
+	 *  (2) the other RX handlers will modify the skb we got.
+	 *
+	 * We don't need to, of course, if we aren't going to return
+	 * the SKB because it has a bad FCS/PLCP checksum.
+	 */
+
+	if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
+		present_fcs_len = FCS_LEN;
+
+	/* ensure hdr->frame_control and vendor radiotap data are in skb head */
+	if (!pskb_may_pull(origskb, 2 + status->vendor_radiotap_len)) {
+		dev_kfree_skb(origskb);
+		return NULL;
+	}
+
+	if (!local->monitors) {
+		if (should_drop_frame(origskb, present_fcs_len)) {
+			dev_kfree_skb(origskb);
+			return NULL;
+		}
+
+		return remove_monitor_info(local, origskb);
+	}
+
+	/* room for the radiotap header based on driver features */
+	needed_headroom = ieee80211_rx_radiotap_space(local, status);
+
+	if (should_drop_frame(origskb, present_fcs_len)) {
+		/* only need to expand headroom if necessary */
+		skb = origskb;
+		origskb = NULL;
+
+		/*
+		 * This shouldn't trigger often because most devices have an
+		 * RX header they pull before we get here, and that should
+		 * be big enough for our radiotap information. We should
+		 * probably export the length to drivers so that we can have
+		 * them allocate enough headroom to start with.
+		 */
+		if (skb_headroom(skb) < needed_headroom &&
+		    pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) {
+			dev_kfree_skb(skb);
+			return NULL;
+		}
+	} else {
+		/*
+		 * Need to make a copy and possibly remove radiotap header
+		 * and FCS from the original.
+		 */
+		skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC);
+
+		origskb = remove_monitor_info(local, origskb);
+
+		if (!skb)
+			return origskb;
+	}
+
+	/* prepend radiotap information */
+	ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom,
+					 true);
+
+	skb_reset_mac_header(skb);
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = htons(ETH_P_802_2);
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
+			continue;
+
+		if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)
+			continue;
+
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		if (prev_dev) {
+			skb2 = skb_clone(skb, GFP_ATOMIC);
+			if (skb2) {
+				skb2->dev = prev_dev;
+				netif_receive_skb(skb2);
+			}
+		}
+
+		prev_dev = sdata->dev;
+		sdata->dev->stats.rx_packets++;
+		sdata->dev->stats.rx_bytes += skb->len;
+	}
+
+	if (prev_dev) {
+		skb->dev = prev_dev;
+		netif_receive_skb(skb);
+	} else
+		dev_kfree_skb(skb);
+
+	return origskb;
+}
+
+static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+	int tid, seqno_idx, security_idx;
+
+	/* does the frame have a qos control field? */
+	if (ieee80211_is_data_qos(hdr->frame_control)) {
+		u8 *qc = ieee80211_get_qos_ctl(hdr);
+		/* frame has qos control */
+		tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
+		if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
+			status->rx_flags |= IEEE80211_RX_AMSDU;
+
+		seqno_idx = tid;
+		security_idx = tid;
+	} else {
+		/*
+		 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
+		 *
+		 *	Sequence numbers for management frames, QoS data
+		 *	frames with a broadcast/multicast address in the
+		 *	Address 1 field, and all non-QoS data frames sent
+		 *	by QoS STAs are assigned using an additional single
+		 *	modulo-4096 counter, [...]
+		 *
+		 * We also use that counter for non-QoS STAs.
+		 */
+		seqno_idx = IEEE80211_NUM_TIDS;
+		security_idx = 0;
+		if (ieee80211_is_mgmt(hdr->frame_control))
+			security_idx = IEEE80211_NUM_TIDS;
+		tid = 0;
+	}
+
+	rx->seqno_idx = seqno_idx;
+	rx->security_idx = security_idx;
+	/* Set skb->priority to 1d tag if highest order bit of TID is not set.
+	 * For now, set skb->priority to 0 for other cases. */
+	rx->skb->priority = (tid > 7) ? 0 : tid;
+}
+
+/**
+ * DOC: Packet alignment
+ *
+ * Drivers always need to pass packets that are aligned to two-byte boundaries
+ * to the stack.
+ *
+ * Additionally, should, if possible, align the payload data in a way that
+ * guarantees that the contained IP header is aligned to a four-byte
+ * boundary. In the case of regular frames, this simply means aligning the
+ * payload to a four-byte boundary (because either the IP header is directly
+ * contained, or IV/RFC1042 headers that have a length divisible by four are
+ * in front of it).  If the payload data is not properly aligned and the
+ * architecture doesn't support efficient unaligned operations, mac80211
+ * will align the data.
+ *
+ * With A-MSDU frames, however, the payload data address must yield two modulo
+ * four because there are 14-byte 802.3 headers within the A-MSDU frames that
+ * push the IP header further back to a multiple of four again. Thankfully, the
+ * specs were sane enough this time around to require padding each A-MSDU
+ * subframe to a length that is a multiple of four.
+ *
+ * Padding like Atheros hardware adds which is between the 802.11 header and
+ * the payload is not supported, the driver is required to move the 802.11
+ * header to be directly in front of the payload in that case.
+ */
+static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx)
+{
+#ifdef CPTCFG_MAC80211_VERBOSE_DEBUG
+	WARN_ONCE((unsigned long)rx->skb->data & 1,
+		  "unaligned packet at 0x%p\n", rx->skb->data);
+#endif
+}
+
+
+/* rx handlers */
+
+static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+
+	if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1))
+		return 0;
+
+	return ieee80211_is_robust_mgmt_frame(hdr);
+}
+
+
+static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+
+	if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1))
+		return 0;
+
+	return ieee80211_is_robust_mgmt_frame(hdr);
+}
+
+
+/* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
+static int ieee80211_get_mmie_keyidx(struct sk_buff *skb)
+{
+	struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data;
+	struct ieee80211_mmie *mmie;
+
+	if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da))
+		return -1;
+
+	if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr))
+		return -1; /* not a robust management frame */
+
+	mmie = (struct ieee80211_mmie *)
+		(skb->data + skb->len - sizeof(*mmie));
+	if (mmie->element_id != WLAN_EID_MMIE ||
+	    mmie->length != sizeof(*mmie) - 2)
+		return -1;
+
+	return le16_to_cpu(mmie->key_id);
+}
+
+static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	char *dev_addr = rx->sdata->vif.addr;
+
+	if (ieee80211_is_data(hdr->frame_control)) {
+		if (is_multicast_ether_addr(hdr->addr1)) {
+			if (ieee80211_has_tods(hdr->frame_control) ||
+			    !ieee80211_has_fromds(hdr->frame_control))
+				return RX_DROP_MONITOR;
+			if (ether_addr_equal(hdr->addr3, dev_addr))
+				return RX_DROP_MONITOR;
+		} else {
+			if (!ieee80211_has_a4(hdr->frame_control))
+				return RX_DROP_MONITOR;
+			if (ether_addr_equal(hdr->addr4, dev_addr))
+				return RX_DROP_MONITOR;
+		}
+	}
+
+	/* If there is not an established peer link and this is not a peer link
+	 * establisment frame, beacon or probe, drop the frame.
+	 */
+
+	if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) {
+		struct ieee80211_mgmt *mgmt;
+
+		if (!ieee80211_is_mgmt(hdr->frame_control))
+			return RX_DROP_MONITOR;
+
+		if (ieee80211_is_action(hdr->frame_control)) {
+			u8 category;
+
+			/* make sure category field is present */
+			if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE)
+				return RX_DROP_MONITOR;
+
+			mgmt = (struct ieee80211_mgmt *)hdr;
+			category = mgmt->u.action.category;
+			if (category != WLAN_CATEGORY_MESH_ACTION &&
+			    category != WLAN_CATEGORY_SELF_PROTECTED)
+				return RX_DROP_MONITOR;
+			return RX_CONTINUE;
+		}
+
+		if (ieee80211_is_probe_req(hdr->frame_control) ||
+		    ieee80211_is_probe_resp(hdr->frame_control) ||
+		    ieee80211_is_beacon(hdr->frame_control) ||
+		    ieee80211_is_auth(hdr->frame_control))
+			return RX_CONTINUE;
+
+		return RX_DROP_MONITOR;
+	}
+
+	return RX_CONTINUE;
+}
+
+static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata,
+					    struct tid_ampdu_rx *tid_agg_rx,
+					    int index,
+					    struct sk_buff_head *frames)
+{
+	struct sk_buff *skb = tid_agg_rx->reorder_buf[index];
+	struct ieee80211_rx_status *status;
+
+	lockdep_assert_held(&tid_agg_rx->reorder_lock);
+
+	if (!skb)
+		goto no_frame;
+
+	/* release the frame from the reorder ring buffer */
+	tid_agg_rx->stored_mpdu_num--;
+	tid_agg_rx->reorder_buf[index] = NULL;
+	status = IEEE80211_SKB_RXCB(skb);
+	status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE;
+	__skb_queue_tail(frames, skb);
+
+no_frame:
+	tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num);
+}
+
+static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata,
+					     struct tid_ampdu_rx *tid_agg_rx,
+					     u16 head_seq_num,
+					     struct sk_buff_head *frames)
+{
+	int index;
+
+	lockdep_assert_held(&tid_agg_rx->reorder_lock);
+
+	while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) {
+		index = ieee80211_sn_sub(tid_agg_rx->head_seq_num,
+					 tid_agg_rx->ssn) %
+							tid_agg_rx->buf_size;
+		ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
+						frames);
+	}
+}
+
+/*
+ * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
+ * the skb was added to the buffer longer than this time ago, the earlier
+ * frames that have not yet been received are assumed to be lost and the skb
+ * can be released for processing. This may also release other skb's from the
+ * reorder buffer if there are no additional gaps between the frames.
+ *
+ * Callers must hold tid_agg_rx->reorder_lock.
+ */
+#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
+
+static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata,
+					  struct tid_ampdu_rx *tid_agg_rx,
+					  struct sk_buff_head *frames)
+{
+	int index, j;
+
+	lockdep_assert_held(&tid_agg_rx->reorder_lock);
+
+	/* release the buffer until next missing frame */
+	index = ieee80211_sn_sub(tid_agg_rx->head_seq_num,
+				 tid_agg_rx->ssn) % tid_agg_rx->buf_size;
+	if (!tid_agg_rx->reorder_buf[index] &&
+	    tid_agg_rx->stored_mpdu_num) {
+		/*
+		 * No buffers ready to be released, but check whether any
+		 * frames in the reorder buffer have timed out.
+		 */
+		int skipped = 1;
+		for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
+		     j = (j + 1) % tid_agg_rx->buf_size) {
+			if (!tid_agg_rx->reorder_buf[j]) {
+				skipped++;
+				continue;
+			}
+			if (skipped &&
+			    !time_after(jiffies, tid_agg_rx->reorder_time[j] +
+					HT_RX_REORDER_BUF_TIMEOUT))
+				goto set_release_timer;
+
+			ht_dbg_ratelimited(sdata,
+					   "release an RX reorder frame due to timeout on earlier frames\n");
+			ieee80211_release_reorder_frame(sdata, tid_agg_rx, j,
+							frames);
+
+			/*
+			 * Increment the head seq# also for the skipped slots.
+			 */
+			tid_agg_rx->head_seq_num =
+				(tid_agg_rx->head_seq_num +
+				 skipped) & IEEE80211_SN_MASK;
+			skipped = 0;
+		}
+	} else while (tid_agg_rx->reorder_buf[index]) {
+		ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
+						frames);
+		index =	ieee80211_sn_sub(tid_agg_rx->head_seq_num,
+					 tid_agg_rx->ssn) %
+							tid_agg_rx->buf_size;
+	}
+
+	if (tid_agg_rx->stored_mpdu_num) {
+		j = index = ieee80211_sn_sub(tid_agg_rx->head_seq_num,
+					     tid_agg_rx->ssn) %
+							tid_agg_rx->buf_size;
+
+		for (; j != (index - 1) % tid_agg_rx->buf_size;
+		     j = (j + 1) % tid_agg_rx->buf_size) {
+			if (tid_agg_rx->reorder_buf[j])
+				break;
+		}
+
+ set_release_timer:
+
+		mod_timer(&tid_agg_rx->reorder_timer,
+			  tid_agg_rx->reorder_time[j] + 1 +
+			  HT_RX_REORDER_BUF_TIMEOUT);
+	} else {
+		del_timer(&tid_agg_rx->reorder_timer);
+	}
+}
+
+/*
+ * As this function belongs to the RX path it must be under
+ * rcu_read_lock protection. It returns false if the frame
+ * can be processed immediately, true if it was consumed.
+ */
+static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata,
+					     struct tid_ampdu_rx *tid_agg_rx,
+					     struct sk_buff *skb,
+					     struct sk_buff_head *frames)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	u16 sc = le16_to_cpu(hdr->seq_ctrl);
+	u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
+	u16 head_seq_num, buf_size;
+	int index;
+	bool ret = true;
+
+	spin_lock(&tid_agg_rx->reorder_lock);
+
+	buf_size = tid_agg_rx->buf_size;
+	head_seq_num = tid_agg_rx->head_seq_num;
+
+	/* frame with out of date sequence number */
+	if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) {
+		dev_kfree_skb(skb);
+		goto out;
+	}
+
+	/*
+	 * If frame the sequence number exceeds our buffering window
+	 * size release some previous frames to make room for this one.
+	 */
+	if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) {
+		head_seq_num = ieee80211_sn_inc(
+				ieee80211_sn_sub(mpdu_seq_num, buf_size));
+		/* release stored frames up to new head to stack */
+		ieee80211_release_reorder_frames(sdata, tid_agg_rx,
+						 head_seq_num, frames);
+	}
+
+	/* Now the new frame is always in the range of the reordering buffer */
+
+	index = ieee80211_sn_sub(mpdu_seq_num,
+				 tid_agg_rx->ssn) % tid_agg_rx->buf_size;
+
+	/* check if we already stored this frame */
+	if (tid_agg_rx->reorder_buf[index]) {
+		dev_kfree_skb(skb);
+		goto out;
+	}
+
+	/*
+	 * If the current MPDU is in the right order and nothing else
+	 * is stored we can process it directly, no need to buffer it.
+	 * If it is first but there's something stored, we may be able
+	 * to release frames after this one.
+	 */
+	if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
+	    tid_agg_rx->stored_mpdu_num == 0) {
+		tid_agg_rx->head_seq_num =
+			ieee80211_sn_inc(tid_agg_rx->head_seq_num);
+		ret = false;
+		goto out;
+	}
+
+	/* put the frame in the reordering buffer */
+	tid_agg_rx->reorder_buf[index] = skb;
+	tid_agg_rx->reorder_time[index] = jiffies;
+	tid_agg_rx->stored_mpdu_num++;
+	ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames);
+
+ out:
+	spin_unlock(&tid_agg_rx->reorder_lock);
+	return ret;
+}
+
+/*
+ * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
+ * true if the MPDU was buffered, false if it should be processed.
+ */
+static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx,
+				       struct sk_buff_head *frames)
+{
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_local *local = rx->local;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct sta_info *sta = rx->sta;
+	struct tid_ampdu_rx *tid_agg_rx;
+	u16 sc;
+	u8 tid, ack_policy;
+
+	if (!ieee80211_is_data_qos(hdr->frame_control))
+		goto dont_reorder;
+
+	/*
+	 * filter the QoS data rx stream according to
+	 * STA/TID and check if this STA/TID is on aggregation
+	 */
+
+	if (!sta)
+		goto dont_reorder;
+
+	ack_policy = *ieee80211_get_qos_ctl(hdr) &
+		     IEEE80211_QOS_CTL_ACK_POLICY_MASK;
+	tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
+
+	tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
+	if (!tid_agg_rx)
+		goto dont_reorder;
+
+	/* qos null data frames are excluded */
+	if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
+		goto dont_reorder;
+
+	/* not part of a BA session */
+	if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
+	    ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL)
+		goto dont_reorder;
+
+	/* not actually part of this BA session */
+	if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
+		goto dont_reorder;
+
+	/* new, potentially un-ordered, ampdu frame - process it */
+
+	/* reset session timer */
+	if (tid_agg_rx->timeout)
+		tid_agg_rx->last_rx = jiffies;
+
+	/* if this mpdu is fragmented - terminate rx aggregation session */
+	sc = le16_to_cpu(hdr->seq_ctrl);
+	if (sc & IEEE80211_SCTL_FRAG) {
+		skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
+		skb_queue_tail(&rx->sdata->skb_queue, skb);
+		ieee80211_queue_work(&local->hw, &rx->sdata->work);
+		return;
+	}
+
+	/*
+	 * No locking needed -- we will only ever process one
+	 * RX packet at a time, and thus own tid_agg_rx. All
+	 * other code manipulating it needs to (and does) make
+	 * sure that we cannot get to it any more before doing
+	 * anything with it.
+	 */
+	if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb,
+					     frames))
+		return;
+
+ dont_reorder:
+	__skb_queue_tail(frames, skb);
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+
+	/*
+	 * Drop duplicate 802.11 retransmissions
+	 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
+	 */
+	if (rx->skb->len >= 24 && rx->sta &&
+	    !ieee80211_is_ctl(hdr->frame_control) &&
+	    !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
+	    !is_multicast_ether_addr(hdr->addr1)) {
+		if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
+			     rx->sta->last_seq_ctrl[rx->seqno_idx] ==
+			     hdr->seq_ctrl)) {
+			if (status->rx_flags & IEEE80211_RX_RA_MATCH) {
+				rx->local->dot11FrameDuplicateCount++;
+				rx->sta->num_duplicates++;
+			}
+			return RX_DROP_UNUSABLE;
+		} else
+			rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl;
+	}
+
+	if (unlikely(rx->skb->len < 16)) {
+		I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
+		return RX_DROP_MONITOR;
+	}
+
+	/* Drop disallowed frame classes based on STA auth/assoc state;
+	 * IEEE 802.11, Chap 5.5.
+	 *
+	 * mac80211 filters only based on association state, i.e. it drops
+	 * Class 3 frames from not associated stations. hostapd sends
+	 * deauth/disassoc frames when needed. In addition, hostapd is
+	 * responsible for filtering on both auth and assoc states.
+	 */
+
+	if (ieee80211_vif_is_mesh(&rx->sdata->vif))
+		return ieee80211_rx_mesh_check(rx);
+
+	if (unlikely((ieee80211_is_data(hdr->frame_control) ||
+		      ieee80211_is_pspoll(hdr->frame_control)) &&
+		     rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+		     rx->sdata->vif.type != NL80211_IFTYPE_WDS &&
+		     (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) {
+		/*
+		 * accept port control frames from the AP even when it's not
+		 * yet marked ASSOC to prevent a race where we don't set the
+		 * assoc bit quickly enough before it sends the first frame
+		 */
+		if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
+		    ieee80211_is_data_present(hdr->frame_control)) {
+			unsigned int hdrlen;
+			__be16 ethertype;
+
+			hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+			if (rx->skb->len < hdrlen + 8)
+				return RX_DROP_MONITOR;
+
+			skb_copy_bits(rx->skb, hdrlen + 6, &ethertype, 2);
+			if (ethertype == rx->sdata->control_port_protocol)
+				return RX_CONTINUE;
+		}
+
+		if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
+		    cfg80211_rx_spurious_frame(rx->sdata->dev,
+					       hdr->addr2,
+					       GFP_ATOMIC))
+			return RX_DROP_UNUSABLE;
+
+		return RX_DROP_MONITOR;
+	}
+
+	return RX_CONTINUE;
+}
+
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
+{
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	int keyidx;
+	int hdrlen;
+	ieee80211_rx_result result = RX_DROP_UNUSABLE;
+	struct ieee80211_key *sta_ptk = NULL;
+	int mmie_keyidx = -1;
+	__le16 fc;
+
+	/*
+	 * Key selection 101
+	 *
+	 * There are four types of keys:
+	 *  - GTK (group keys)
+	 *  - IGTK (group keys for management frames)
+	 *  - PTK (pairwise keys)
+	 *  - STK (station-to-station pairwise keys)
+	 *
+	 * When selecting a key, we have to distinguish between multicast
+	 * (including broadcast) and unicast frames, the latter can only
+	 * use PTKs and STKs while the former always use GTKs and IGTKs.
+	 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
+	 * unicast frames can also use key indices like GTKs. Hence, if we
+	 * don't have a PTK/STK we check the key index for a WEP key.
+	 *
+	 * Note that in a regular BSS, multicast frames are sent by the
+	 * AP only, associated stations unicast the frame to the AP first
+	 * which then multicasts it on their behalf.
+	 *
+	 * There is also a slight problem in IBSS mode: GTKs are negotiated
+	 * with each station, that is something we don't currently handle.
+	 * The spec seems to expect that one negotiates the same key with
+	 * every station but there's no such requirement; VLANs could be
+	 * possible.
+	 */
+
+	/*
+	 * No point in finding a key and decrypting if the frame is neither
+	 * addressed to us nor a multicast frame.
+	 */
+	if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
+		return RX_CONTINUE;
+
+	/* start without a key */
+	rx->key = NULL;
+
+	if (rx->sta)
+		sta_ptk = rcu_dereference(rx->sta->ptk);
+
+	fc = hdr->frame_control;
+
+	if (!ieee80211_has_protected(fc))
+		mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb);
+
+	if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) {
+		rx->key = sta_ptk;
+		if ((status->flag & RX_FLAG_DECRYPTED) &&
+		    (status->flag & RX_FLAG_IV_STRIPPED))
+			return RX_CONTINUE;
+		/* Skip decryption if the frame is not protected. */
+		if (!ieee80211_has_protected(fc))
+			return RX_CONTINUE;
+	} else if (mmie_keyidx >= 0) {
+		/* Broadcast/multicast robust management frame / BIP */
+		if ((status->flag & RX_FLAG_DECRYPTED) &&
+		    (status->flag & RX_FLAG_IV_STRIPPED))
+			return RX_CONTINUE;
+
+		if (mmie_keyidx < NUM_DEFAULT_KEYS ||
+		    mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
+			return RX_DROP_MONITOR; /* unexpected BIP keyidx */
+		if (rx->sta)
+			rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]);
+		if (!rx->key)
+			rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]);
+	} else if (!ieee80211_has_protected(fc)) {
+		/*
+		 * The frame was not protected, so skip decryption. However, we
+		 * need to set rx->key if there is a key that could have been
+		 * used so that the frame may be dropped if encryption would
+		 * have been expected.
+		 */
+		struct ieee80211_key *key = NULL;
+		struct ieee80211_sub_if_data *sdata = rx->sdata;
+		int i;
+
+		if (ieee80211_is_mgmt(fc) &&
+		    is_multicast_ether_addr(hdr->addr1) &&
+		    (key = rcu_dereference(rx->sdata->default_mgmt_key)))
+			rx->key = key;
+		else {
+			if (rx->sta) {
+				for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
+					key = rcu_dereference(rx->sta->gtk[i]);
+					if (key)
+						break;
+				}
+			}
+			if (!key) {
+				for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
+					key = rcu_dereference(sdata->keys[i]);
+					if (key)
+						break;
+				}
+			}
+			if (key)
+				rx->key = key;
+		}
+		return RX_CONTINUE;
+	} else {
+		u8 keyid;
+		/*
+		 * The device doesn't give us the IV so we won't be
+		 * able to look up the key. That's ok though, we
+		 * don't need to decrypt the frame, we just won't
+		 * be able to keep statistics accurate.
+		 * Except for key threshold notifications, should
+		 * we somehow allow the driver to tell us which key
+		 * the hardware used if this flag is set?
+		 */
+		if ((status->flag & RX_FLAG_DECRYPTED) &&
+		    (status->flag & RX_FLAG_IV_STRIPPED))
+			return RX_CONTINUE;
+
+		hdrlen = ieee80211_hdrlen(fc);
+
+		if (rx->skb->len < 8 + hdrlen)
+			return RX_DROP_UNUSABLE; /* TODO: count this? */
+
+		/*
+		 * no need to call ieee80211_wep_get_keyidx,
+		 * it verifies a bunch of things we've done already
+		 */
+		skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1);
+		keyidx = keyid >> 6;
+
+		/* check per-station GTK first, if multicast packet */
+		if (is_multicast_ether_addr(hdr->addr1) && rx->sta)
+			rx->key = rcu_dereference(rx->sta->gtk[keyidx]);
+
+		/* if not found, try default key */
+		if (!rx->key) {
+			rx->key = rcu_dereference(rx->sdata->keys[keyidx]);
+
+			/*
+			 * RSNA-protected unicast frames should always be
+			 * sent with pairwise or station-to-station keys,
+			 * but for WEP we allow using a key index as well.
+			 */
+			if (rx->key &&
+			    rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 &&
+			    rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 &&
+			    !is_multicast_ether_addr(hdr->addr1))
+				rx->key = NULL;
+		}
+	}
+
+	if (rx->key) {
+		if (unlikely(rx->key->flags & KEY_FLAG_TAINTED))
+			return RX_DROP_MONITOR;
+
+		rx->key->tx_rx_count++;
+		/* TODO: add threshold stuff again */
+	} else {
+		return RX_DROP_MONITOR;
+	}
+
+	switch (rx->key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		result = ieee80211_crypto_wep_decrypt(rx);
+		break;
+	case WLAN_CIPHER_SUITE_TKIP:
+		result = ieee80211_crypto_tkip_decrypt(rx);
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+		result = ieee80211_crypto_ccmp_decrypt(rx);
+		break;
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		result = ieee80211_crypto_aes_cmac_decrypt(rx);
+		break;
+	default:
+		/*
+		 * We can reach here only with HW-only algorithms
+		 * but why didn't it decrypt the frame?!
+		 */
+		return RX_DROP_UNUSABLE;
+	}
+
+	/* the hdr variable is invalid after the decrypt handlers */
+
+	/* either the frame has been decrypted or will be dropped */
+	status->flag |= RX_FLAG_DECRYPTED;
+
+	return result;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_local *local;
+	struct ieee80211_hdr *hdr;
+	struct sk_buff *skb;
+
+	local = rx->local;
+	skb = rx->skb;
+	hdr = (struct ieee80211_hdr *) skb->data;
+
+	if (!local->pspolling)
+		return RX_CONTINUE;
+
+	if (!ieee80211_has_fromds(hdr->frame_control))
+		/* this is not from AP */
+		return RX_CONTINUE;
+
+	if (!ieee80211_is_data(hdr->frame_control))
+		return RX_CONTINUE;
+
+	if (!ieee80211_has_moredata(hdr->frame_control)) {
+		/* AP has no more frames buffered for us */
+		local->pspolling = false;
+		return RX_CONTINUE;
+	}
+
+	/* more data bit is set, let's request a new frame from the AP */
+	ieee80211_send_pspoll(local, rx->sdata);
+
+	return RX_CONTINUE;
+}
+
+static void sta_ps_start(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct ps_data *ps;
+
+	if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+	    sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+		ps = &sdata->bss->ps;
+	else
+		return;
+
+	atomic_inc(&ps->num_sta_ps);
+	set_sta_flag(sta, WLAN_STA_PS_STA);
+	if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
+		drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
+	ps_dbg(sdata, "STA %pM aid %d enters power save mode\n",
+	       sta->sta.addr, sta->sta.aid);
+}
+
+static void sta_ps_end(struct sta_info *sta)
+{
+	ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n",
+	       sta->sta.addr, sta->sta.aid);
+
+	if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
+		ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n",
+		       sta->sta.addr, sta->sta.aid);
+		return;
+	}
+
+	ieee80211_sta_ps_deliver_wakeup(sta);
+}
+
+int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start)
+{
+	struct sta_info *sta_inf = container_of(sta, struct sta_info, sta);
+	bool in_ps;
+
+	WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS));
+
+	/* Don't let the same PS state be set twice */
+	in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA);
+	if ((start && in_ps) || (!start && !in_ps))
+		return -EINVAL;
+
+	if (start)
+		sta_ps_start(sta_inf);
+	else
+		sta_ps_end(sta_inf);
+
+	return 0;
+}
+EXPORT_SYMBOL(ieee80211_sta_ps_transition);
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_hdr *hdr = (void *)rx->skb->data;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+	int tid, ac;
+
+	if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH))
+		return RX_CONTINUE;
+
+	if (sdata->vif.type != NL80211_IFTYPE_AP &&
+	    sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
+		return RX_CONTINUE;
+
+	/*
+	 * The device handles station powersave, so don't do anything about
+	 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
+	 * it to mac80211 since they're handled.)
+	 */
+	if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS)
+		return RX_CONTINUE;
+
+	/*
+	 * Don't do anything if the station isn't already asleep. In
+	 * the uAPSD case, the station will probably be marked asleep,
+	 * in the PS-Poll case the station must be confused ...
+	 */
+	if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA))
+		return RX_CONTINUE;
+
+	if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) {
+		if (!test_sta_flag(rx->sta, WLAN_STA_SP)) {
+			if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
+				ieee80211_sta_ps_deliver_poll_response(rx->sta);
+			else
+				set_sta_flag(rx->sta, WLAN_STA_PSPOLL);
+		}
+
+		/* Free PS Poll skb here instead of returning RX_DROP that would
+		 * count as an dropped frame. */
+		dev_kfree_skb(rx->skb);
+
+		return RX_QUEUED;
+	} else if (!ieee80211_has_morefrags(hdr->frame_control) &&
+		   !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
+		   ieee80211_has_pm(hdr->frame_control) &&
+		   (ieee80211_is_data_qos(hdr->frame_control) ||
+		    ieee80211_is_qos_nullfunc(hdr->frame_control))) {
+		tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
+		ac = ieee802_1d_to_ac[tid & 7];
+
+		/*
+		 * If this AC is not trigger-enabled do nothing.
+		 *
+		 * NB: This could/should check a separate bitmap of trigger-
+		 * enabled queues, but for now we only implement uAPSD w/o
+		 * TSPEC changes to the ACs, so they're always the same.
+		 */
+		if (!(rx->sta->sta.uapsd_queues & BIT(ac)))
+			return RX_CONTINUE;
+
+		/* if we are in a service period, do nothing */
+		if (test_sta_flag(rx->sta, WLAN_STA_SP))
+			return RX_CONTINUE;
+
+		if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
+			ieee80211_sta_ps_deliver_uapsd(rx->sta);
+		else
+			set_sta_flag(rx->sta, WLAN_STA_UAPSD);
+	}
+
+	return RX_CONTINUE;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
+{
+	struct sta_info *sta = rx->sta;
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+
+	if (!sta)
+		return RX_CONTINUE;
+
+	/*
+	 * Update last_rx only for IBSS packets which are for the current
+	 * BSSID and for station already AUTHORIZED to avoid keeping the
+	 * current IBSS network alive in cases where other STAs start
+	 * using different BSSID. This will also give the station another
+	 * chance to restart the authentication/authorization in case
+	 * something went wrong the first time.
+	 */
+	if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+		u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
+						NL80211_IFTYPE_ADHOC);
+		if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) &&
+		    test_sta_flag(sta, WLAN_STA_AUTHORIZED)) {
+			sta->last_rx = jiffies;
+			if (ieee80211_is_data(hdr->frame_control)) {
+				sta->last_rx_rate_idx = status->rate_idx;
+				sta->last_rx_rate_flag = status->flag;
+				sta->last_rx_rate_vht_nss = status->vht_nss;
+			}
+		}
+	} else if (!is_multicast_ether_addr(hdr->addr1)) {
+		/*
+		 * Mesh beacons will update last_rx when if they are found to
+		 * match the current local configuration when processed.
+		 */
+		sta->last_rx = jiffies;
+		if (ieee80211_is_data(hdr->frame_control)) {
+			sta->last_rx_rate_idx = status->rate_idx;
+			sta->last_rx_rate_flag = status->flag;
+			sta->last_rx_rate_vht_nss = status->vht_nss;
+		}
+	}
+
+	if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
+		return RX_CONTINUE;
+
+	if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
+		ieee80211_sta_rx_notify(rx->sdata, hdr);
+
+	sta->rx_fragments++;
+	sta->rx_bytes += rx->skb->len;
+	if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
+		sta->last_signal = status->signal;
+		ewma_add(&sta->avg_signal, -status->signal);
+	}
+
+	/*
+	 * Change STA power saving mode only at the end of a frame
+	 * exchange sequence.
+	 */
+	if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) &&
+	    !ieee80211_has_morefrags(hdr->frame_control) &&
+	    !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
+	    (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
+	     rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
+		if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
+			/*
+			 * Ignore doze->wake transitions that are
+			 * indicated by non-data frames, the standard
+			 * is unclear here, but for example going to
+			 * PS mode and then scanning would cause a
+			 * doze->wake transition for the probe request,
+			 * and that is clearly undesirable.
+			 */
+			if (ieee80211_is_data(hdr->frame_control) &&
+			    !ieee80211_has_pm(hdr->frame_control))
+				sta_ps_end(sta);
+		} else {
+			if (ieee80211_has_pm(hdr->frame_control))
+				sta_ps_start(sta);
+		}
+	}
+
+	/* mesh power save support */
+	if (ieee80211_vif_is_mesh(&rx->sdata->vif))
+		ieee80211_mps_rx_h_sta_process(sta, hdr);
+
+	/*
+	 * Drop (qos-)data::nullfunc frames silently, since they
+	 * are used only to control station power saving mode.
+	 */
+	if (ieee80211_is_nullfunc(hdr->frame_control) ||
+	    ieee80211_is_qos_nullfunc(hdr->frame_control)) {
+		I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
+
+		/*
+		 * If we receive a 4-addr nullfunc frame from a STA
+		 * that was not moved to a 4-addr STA vlan yet send
+		 * the event to userspace and for older hostapd drop
+		 * the frame to the monitor interface.
+		 */
+		if (ieee80211_has_a4(hdr->frame_control) &&
+		    (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
+		     (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+		      !rx->sdata->u.vlan.sta))) {
+			if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT))
+				cfg80211_rx_unexpected_4addr_frame(
+					rx->sdata->dev, sta->sta.addr,
+					GFP_ATOMIC);
+			return RX_DROP_MONITOR;
+		}
+		/*
+		 * Update counter and free packet here to avoid
+		 * counting this as a dropped packed.
+		 */
+		sta->rx_packets++;
+		dev_kfree_skb(rx->skb);
+		return RX_QUEUED;
+	}
+
+	return RX_CONTINUE;
+} /* ieee80211_rx_h_sta_process */
+
+static inline struct ieee80211_fragment_entry *
+ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
+			 unsigned int frag, unsigned int seq, int rx_queue,
+			 struct sk_buff **skb)
+{
+	struct ieee80211_fragment_entry *entry;
+
+	entry = &sdata->fragments[sdata->fragment_next++];
+	if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
+		sdata->fragment_next = 0;
+
+	if (!skb_queue_empty(&entry->skb_list))
+		__skb_queue_purge(&entry->skb_list);
+
+	__skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
+	*skb = NULL;
+	entry->first_frag_time = jiffies;
+	entry->seq = seq;
+	entry->rx_queue = rx_queue;
+	entry->last_frag = frag;
+	entry->ccmp = 0;
+	entry->extra_len = 0;
+
+	return entry;
+}
+
+static inline struct ieee80211_fragment_entry *
+ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
+			  unsigned int frag, unsigned int seq,
+			  int rx_queue, struct ieee80211_hdr *hdr)
+{
+	struct ieee80211_fragment_entry *entry;
+	int i, idx;
+
+	idx = sdata->fragment_next;
+	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
+		struct ieee80211_hdr *f_hdr;
+
+		idx--;
+		if (idx < 0)
+			idx = IEEE80211_FRAGMENT_MAX - 1;
+
+		entry = &sdata->fragments[idx];
+		if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
+		    entry->rx_queue != rx_queue ||
+		    entry->last_frag + 1 != frag)
+			continue;
+
+		f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data;
+
+		/*
+		 * Check ftype and addresses are equal, else check next fragment
+		 */
+		if (((hdr->frame_control ^ f_hdr->frame_control) &
+		     cpu_to_le16(IEEE80211_FCTL_FTYPE)) ||
+		    !ether_addr_equal(hdr->addr1, f_hdr->addr1) ||
+		    !ether_addr_equal(hdr->addr2, f_hdr->addr2))
+			continue;
+
+		if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
+			__skb_queue_purge(&entry->skb_list);
+			continue;
+		}
+		return entry;
+	}
+
+	return NULL;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *hdr;
+	u16 sc;
+	__le16 fc;
+	unsigned int frag, seq;
+	struct ieee80211_fragment_entry *entry;
+	struct sk_buff *skb;
+	struct ieee80211_rx_status *status;
+
+	hdr = (struct ieee80211_hdr *)rx->skb->data;
+	fc = hdr->frame_control;
+
+	if (ieee80211_is_ctl(fc))
+		return RX_CONTINUE;
+
+	sc = le16_to_cpu(hdr->seq_ctrl);
+	frag = sc & IEEE80211_SCTL_FRAG;
+
+	if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
+		   is_multicast_ether_addr(hdr->addr1))) {
+		/* not fragmented */
+		goto out;
+	}
+	I802_DEBUG_INC(rx->local->rx_handlers_fragments);
+
+	if (skb_linearize(rx->skb))
+		return RX_DROP_UNUSABLE;
+
+	/*
+	 *  skb_linearize() might change the skb->data and
+	 *  previously cached variables (in this case, hdr) need to
+	 *  be refreshed with the new data.
+	 */
+	hdr = (struct ieee80211_hdr *)rx->skb->data;
+	seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
+
+	if (frag == 0) {
+		/* This is the first fragment of a new frame. */
+		entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
+						 rx->seqno_idx, &(rx->skb));
+		if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP &&
+		    ieee80211_has_protected(fc)) {
+			int queue = rx->security_idx;
+			/* Store CCMP PN so that we can verify that the next
+			 * fragment has a sequential PN value. */
+			entry->ccmp = 1;
+			memcpy(entry->last_pn,
+			       rx->key->u.ccmp.rx_pn[queue],
+			       CCMP_PN_LEN);
+		}
+		return RX_QUEUED;
+	}
+
+	/* This is a fragment for a frame that should already be pending in
+	 * fragment cache. Add this fragment to the end of the pending entry.
+	 */
+	entry = ieee80211_reassemble_find(rx->sdata, frag, seq,
+					  rx->seqno_idx, hdr);
+	if (!entry) {
+		I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
+		return RX_DROP_MONITOR;
+	}
+
+	/* Verify that MPDUs within one MSDU have sequential PN values.
+	 * (IEEE 802.11i, 8.3.3.4.5) */
+	if (entry->ccmp) {
+		int i;
+		u8 pn[CCMP_PN_LEN], *rpn;
+		int queue;
+		if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP)
+			return RX_DROP_UNUSABLE;
+		memcpy(pn, entry->last_pn, CCMP_PN_LEN);
+		for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
+			pn[i]++;
+			if (pn[i])
+				break;
+		}
+		queue = rx->security_idx;
+		rpn = rx->key->u.ccmp.rx_pn[queue];
+		if (memcmp(pn, rpn, CCMP_PN_LEN))
+			return RX_DROP_UNUSABLE;
+		memcpy(entry->last_pn, pn, CCMP_PN_LEN);
+	}
+
+	skb_pull(rx->skb, ieee80211_hdrlen(fc));
+	__skb_queue_tail(&entry->skb_list, rx->skb);
+	entry->last_frag = frag;
+	entry->extra_len += rx->skb->len;
+	if (ieee80211_has_morefrags(fc)) {
+		rx->skb = NULL;
+		return RX_QUEUED;
+	}
+
+	rx->skb = __skb_dequeue(&entry->skb_list);
+	if (skb_tailroom(rx->skb) < entry->extra_len) {
+		I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
+		if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
+					      GFP_ATOMIC))) {
+			I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
+			__skb_queue_purge(&entry->skb_list);
+			return RX_DROP_UNUSABLE;
+		}
+	}
+	while ((skb = __skb_dequeue(&entry->skb_list))) {
+		memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
+		dev_kfree_skb(skb);
+	}
+
+	/* Complete frame has been reassembled - process it now */
+	status = IEEE80211_SKB_RXCB(rx->skb);
+	status->rx_flags |= IEEE80211_RX_FRAGMENTED;
+
+ out:
+	if (rx->sta)
+		rx->sta->rx_packets++;
+	if (is_multicast_ether_addr(hdr->addr1))
+		rx->local->dot11MulticastReceivedFrameCount++;
+	else
+		ieee80211_led_rx(rx->local);
+	return RX_CONTINUE;
+}
+
+static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
+{
+	if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED)))
+		return -EACCES;
+
+	return 0;
+}
+
+static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
+{
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+
+	/*
+	 * Pass through unencrypted frames if the hardware has
+	 * decrypted them already.
+	 */
+	if (status->flag & RX_FLAG_DECRYPTED)
+		return 0;
+
+	/* Drop unencrypted frames if key is set. */
+	if (unlikely(!ieee80211_has_protected(fc) &&
+		     !ieee80211_is_nullfunc(fc) &&
+		     ieee80211_is_data(fc) &&
+		     (rx->key || rx->sdata->drop_unencrypted)))
+		return -EACCES;
+
+	return 0;
+}
+
+static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+	__le16 fc = hdr->frame_control;
+
+	/*
+	 * Pass through unencrypted frames if the hardware has
+	 * decrypted them already.
+	 */
+	if (status->flag & RX_FLAG_DECRYPTED)
+		return 0;
+
+	if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) {
+		if (unlikely(!ieee80211_has_protected(fc) &&
+			     ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
+			     rx->key)) {
+			if (ieee80211_is_deauth(fc))
+				cfg80211_send_unprot_deauth(rx->sdata->dev,
+							    rx->skb->data,
+							    rx->skb->len);
+			else if (ieee80211_is_disassoc(fc))
+				cfg80211_send_unprot_disassoc(rx->sdata->dev,
+							      rx->skb->data,
+							      rx->skb->len);
+			return -EACCES;
+		}
+		/* BIP does not use Protected field, so need to check MMIE */
+		if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) &&
+			     ieee80211_get_mmie_keyidx(rx->skb) < 0)) {
+			if (ieee80211_is_deauth(fc))
+				cfg80211_send_unprot_deauth(rx->sdata->dev,
+							    rx->skb->data,
+							    rx->skb->len);
+			else if (ieee80211_is_disassoc(fc))
+				cfg80211_send_unprot_disassoc(rx->sdata->dev,
+							      rx->skb->data,
+							      rx->skb->len);
+			return -EACCES;
+		}
+		/*
+		 * When using MFP, Action frames are not allowed prior to
+		 * having configured keys.
+		 */
+		if (unlikely(ieee80211_is_action(fc) && !rx->key &&
+			     ieee80211_is_robust_mgmt_frame(
+				     (struct ieee80211_hdr *) rx->skb->data)))
+			return -EACCES;
+	}
+
+	return 0;
+}
+
+static int
+__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
+{
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	bool check_port_control = false;
+	struct ethhdr *ehdr;
+	int ret;
+
+	*port_control = false;
+	if (ieee80211_has_a4(hdr->frame_control) &&
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
+		return -1;
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+	    !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
+
+		if (!sdata->u.mgd.use_4addr)
+			return -1;
+		else
+			check_port_control = true;
+	}
+
+	if (is_multicast_ether_addr(hdr->addr1) &&
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
+		return -1;
+
+	ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
+	if (ret < 0)
+		return ret;
+
+	ehdr = (struct ethhdr *) rx->skb->data;
+	if (ehdr->h_proto == rx->sdata->control_port_protocol)
+		*port_control = true;
+	else if (check_port_control)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * requires that rx->skb is a frame with ethernet header
+ */
+static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
+{
+	static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
+		= { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
+	struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
+
+	/*
+	 * Allow EAPOL frames to us/the PAE group address regardless
+	 * of whether the frame was encrypted or not.
+	 */
+	if (ehdr->h_proto == rx->sdata->control_port_protocol &&
+	    (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) ||
+	     ether_addr_equal(ehdr->h_dest, pae_group_addr)))
+		return true;
+
+	if (ieee80211_802_1x_port_control(rx) ||
+	    ieee80211_drop_unencrypted(rx, fc))
+		return false;
+
+	return true;
+}
+
+/*
+ * requires that rx->skb is a frame with ethernet header
+ */
+static void
+ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct net_device *dev = sdata->dev;
+	struct sk_buff *skb, *xmit_skb;
+	struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
+	struct sta_info *dsta;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+
+	skb = rx->skb;
+	xmit_skb = NULL;
+
+	if ((sdata->vif.type == NL80211_IFTYPE_AP ||
+	     sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
+	    !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
+	    (status->rx_flags & IEEE80211_RX_RA_MATCH) &&
+	    (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) {
+		if (is_multicast_ether_addr(ehdr->h_dest)) {
+			/*
+			 * send multicast frames both to higher layers in
+			 * local net stack and back to the wireless medium
+			 */
+			xmit_skb = skb_copy(skb, GFP_ATOMIC);
+			if (!xmit_skb)
+				net_info_ratelimited("%s: failed to clone multicast frame\n",
+						    dev->name);
+		} else {
+			dsta = sta_info_get(sdata, skb->data);
+			if (dsta) {
+				/*
+				 * The destination station is associated to
+				 * this AP (in this VLAN), so send the frame
+				 * directly to it and do not pass it to local
+				 * net stack.
+				 */
+				xmit_skb = skb;
+				skb = NULL;
+			}
+		}
+	}
+
+	if (skb) {
+		int align __maybe_unused;
+
+#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+		/*
+		 * 'align' will only take the values 0 or 2 here
+		 * since all frames are required to be aligned
+		 * to 2-byte boundaries when being passed to
+		 * mac80211; the code here works just as well if
+		 * that isn't true, but mac80211 assumes it can
+		 * access fields as 2-byte aligned (e.g. for
+		 * compare_ether_addr)
+		 */
+		align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3;
+		if (align) {
+			if (WARN_ON(skb_headroom(skb) < 3)) {
+				dev_kfree_skb(skb);
+				skb = NULL;
+			} else {
+				u8 *data = skb->data;
+				size_t len = skb_headlen(skb);
+				skb->data -= align;
+				memmove(skb->data, data, len);
+				skb_set_tail_pointer(skb, len);
+			}
+		}
+#endif
+
+		if (skb) {
+			/* deliver to local stack */
+			skb->protocol = eth_type_trans(skb, dev);
+			memset(skb->cb, 0, sizeof(skb->cb));
+			netif_receive_skb(skb);
+		}
+	}
+
+	if (xmit_skb) {
+		/*
+		 * Send to wireless media and increase priority by 256 to
+		 * keep the received priority instead of reclassifying
+		 * the frame (see cfg80211_classify8021d).
+		 */
+		xmit_skb->priority += 256;
+		xmit_skb->protocol = htons(ETH_P_802_3);
+		skb_reset_network_header(xmit_skb);
+		skb_reset_mac_header(xmit_skb);
+		dev_queue_xmit(xmit_skb);
+	}
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
+{
+	struct net_device *dev = rx->sdata->dev;
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	__le16 fc = hdr->frame_control;
+	struct sk_buff_head frame_list;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+
+	if (unlikely(!ieee80211_is_data(fc)))
+		return RX_CONTINUE;
+
+	if (unlikely(!ieee80211_is_data_present(fc)))
+		return RX_DROP_MONITOR;
+
+	if (!(status->rx_flags & IEEE80211_RX_AMSDU))
+		return RX_CONTINUE;
+
+	if (ieee80211_has_a4(hdr->frame_control) &&
+	    rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+	    !rx->sdata->u.vlan.sta)
+		return RX_DROP_UNUSABLE;
+
+	if (is_multicast_ether_addr(hdr->addr1) &&
+	    ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+	      rx->sdata->u.vlan.sta) ||
+	     (rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
+	      rx->sdata->u.mgd.use_4addr)))
+		return RX_DROP_UNUSABLE;
+
+	skb->dev = dev;
+	__skb_queue_head_init(&frame_list);
+
+	if (skb_linearize(skb))
+		return RX_DROP_UNUSABLE;
+
+	ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,
+				 rx->sdata->vif.type,
+				 rx->local->hw.extra_tx_headroom, true);
+
+	while (!skb_queue_empty(&frame_list)) {
+		rx->skb = __skb_dequeue(&frame_list);
+
+		if (!ieee80211_frame_allowed(rx, fc)) {
+			dev_kfree_skb(rx->skb);
+			continue;
+		}
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += rx->skb->len;
+
+		ieee80211_deliver_skb(rx);
+	}
+
+	return RX_QUEUED;
+}
+
+#ifdef CPTCFG_MAC80211_MESH
+static ieee80211_rx_result
+ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *fwd_hdr, *hdr;
+	struct ieee80211_tx_info *info;
+	struct ieee80211s_hdr *mesh_hdr;
+	struct sk_buff *skb = rx->skb, *fwd_skb;
+	struct ieee80211_local *local = rx->local;
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	__le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD);
+	u16 q, hdrlen;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+	/* make sure fixed part of mesh header is there, also checks skb len */
+	if (!pskb_may_pull(rx->skb, hdrlen + 6))
+		return RX_DROP_MONITOR;
+
+	mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
+
+	/* make sure full mesh header is there, also checks skb len */
+	if (!pskb_may_pull(rx->skb,
+			   hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr)))
+		return RX_DROP_MONITOR;
+
+	/* reload pointers */
+	hdr = (struct ieee80211_hdr *) skb->data;
+	mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
+
+	/* frame is in RMC, don't forward */
+	if (ieee80211_is_data(hdr->frame_control) &&
+	    is_multicast_ether_addr(hdr->addr1) &&
+	    mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr))
+		return RX_DROP_MONITOR;
+
+	if (!ieee80211_is_data(hdr->frame_control) ||
+	    !(status->rx_flags & IEEE80211_RX_RA_MATCH))
+		return RX_CONTINUE;
+
+	if (!mesh_hdr->ttl)
+		return RX_DROP_MONITOR;
+
+	if (mesh_hdr->flags & MESH_FLAGS_AE) {
+		struct mesh_path *mppath;
+		char *proxied_addr;
+		char *mpp_addr;
+
+		if (is_multicast_ether_addr(hdr->addr1)) {
+			mpp_addr = hdr->addr3;
+			proxied_addr = mesh_hdr->eaddr1;
+		} else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) {
+			/* has_a4 already checked in ieee80211_rx_mesh_check */
+			mpp_addr = hdr->addr4;
+			proxied_addr = mesh_hdr->eaddr2;
+		} else {
+			return RX_DROP_MONITOR;
+		}
+
+		rcu_read_lock();
+		mppath = mpp_path_lookup(sdata, proxied_addr);
+		if (!mppath) {
+			mpp_path_add(sdata, proxied_addr, mpp_addr);
+		} else {
+			spin_lock_bh(&mppath->state_lock);
+			if (!ether_addr_equal(mppath->mpp, mpp_addr))
+				memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
+			spin_unlock_bh(&mppath->state_lock);
+		}
+		rcu_read_unlock();
+	}
+
+	/* Frame has reached destination.  Don't forward */
+	if (!is_multicast_ether_addr(hdr->addr1) &&
+	    ether_addr_equal(sdata->vif.addr, hdr->addr3))
+		return RX_CONTINUE;
+
+	q = ieee80211_select_queue_80211(sdata, skb, hdr);
+	if (ieee80211_queue_stopped(&local->hw, q)) {
+		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion);
+		return RX_DROP_MONITOR;
+	}
+	skb_set_queue_mapping(skb, q);
+
+	if (!--mesh_hdr->ttl) {
+		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
+		goto out;
+	}
+
+	if (!ifmsh->mshcfg.dot11MeshForwarding)
+		goto out;
+
+	fwd_skb = skb_copy(skb, GFP_ATOMIC);
+	if (!fwd_skb) {
+		net_info_ratelimited("%s: failed to clone mesh frame\n",
+				    sdata->name);
+		goto out;
+	}
+
+	fwd_hdr =  (struct ieee80211_hdr *) fwd_skb->data;
+	fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY);
+	info = IEEE80211_SKB_CB(fwd_skb);
+	memset(info, 0, sizeof(*info));
+	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+	info->control.vif = &rx->sdata->vif;
+	info->control.jiffies = jiffies;
+	if (is_multicast_ether_addr(fwd_hdr->addr1)) {
+		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
+		memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
+		/* update power mode indication when forwarding */
+		ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr);
+	} else if (!mesh_nexthop_lookup(sdata, fwd_skb)) {
+		/* mesh power mode flags updated in mesh_nexthop_lookup */
+		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
+	} else {
+		/* unable to resolve next hop */
+		mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl,
+				   fwd_hdr->addr3, 0, reason, fwd_hdr->addr2);
+		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route);
+		kfree_skb(fwd_skb);
+		return RX_DROP_MONITOR;
+	}
+
+	IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
+	ieee80211_add_pending_skb(local, fwd_skb);
+ out:
+	if (is_multicast_ether_addr(hdr->addr1) ||
+	    sdata->dev->flags & IFF_PROMISC)
+		return RX_CONTINUE;
+	else
+		return RX_DROP_MONITOR;
+}
+#endif
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_local *local = rx->local;
+	struct net_device *dev = sdata->dev;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	__le16 fc = hdr->frame_control;
+	bool port_control;
+	int err;
+
+	if (unlikely(!ieee80211_is_data(hdr->frame_control)))
+		return RX_CONTINUE;
+
+	if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
+		return RX_DROP_MONITOR;
+
+	/*
+	 * Send unexpected-4addr-frame event to hostapd. For older versions,
+	 * also drop the frame to cooked monitor interfaces.
+	 */
+	if (ieee80211_has_a4(hdr->frame_control) &&
+	    sdata->vif.type == NL80211_IFTYPE_AP) {
+		if (rx->sta &&
+		    !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
+			cfg80211_rx_unexpected_4addr_frame(
+				rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC);
+		return RX_DROP_MONITOR;
+	}
+
+	err = __ieee80211_data_to_8023(rx, &port_control);
+	if (unlikely(err))
+		return RX_DROP_UNUSABLE;
+
+	if (!ieee80211_frame_allowed(rx, fc))
+		return RX_DROP_MONITOR;
+
+	if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+	    unlikely(port_control) && sdata->bss) {
+		sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
+				     u.ap);
+		dev = sdata->dev;
+		rx->sdata = sdata;
+	}
+
+	rx->skb->dev = dev;
+
+	dev->stats.rx_packets++;
+	dev->stats.rx_bytes += rx->skb->len;
+
+	if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
+	    !is_multicast_ether_addr(
+		    ((struct ethhdr *)rx->skb->data)->h_dest) &&
+	    (!local->scanning &&
+	     !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) {
+			mod_timer(&local->dynamic_ps_timer, jiffies +
+			 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
+	}
+
+	ieee80211_deliver_skb(rx);
+
+	return RX_QUEUED;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames)
+{
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
+	struct tid_ampdu_rx *tid_agg_rx;
+	u16 start_seq_num;
+	u16 tid;
+
+	if (likely(!ieee80211_is_ctl(bar->frame_control)))
+		return RX_CONTINUE;
+
+	if (ieee80211_is_back_req(bar->frame_control)) {
+		struct {
+			__le16 control, start_seq_num;
+		} __packed bar_data;
+
+		if (!rx->sta)
+			return RX_DROP_MONITOR;
+
+		if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control),
+				  &bar_data, sizeof(bar_data)))
+			return RX_DROP_MONITOR;
+
+		tid = le16_to_cpu(bar_data.control) >> 12;
+
+		tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]);
+		if (!tid_agg_rx)
+			return RX_DROP_MONITOR;
+
+		start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4;
+
+		/* reset session timer */
+		if (tid_agg_rx->timeout)
+			mod_timer(&tid_agg_rx->session_timer,
+				  TU_TO_EXP_TIME(tid_agg_rx->timeout));
+
+		spin_lock(&tid_agg_rx->reorder_lock);
+		/* release stored frames up to start of BAR */
+		ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx,
+						 start_seq_num, frames);
+		spin_unlock(&tid_agg_rx->reorder_lock);
+
+		kfree_skb(skb);
+		return RX_QUEUED;
+	}
+
+	/*
+	 * After this point, we only want management frames,
+	 * so we can drop all remaining control frames to
+	 * cooked monitor interfaces.
+	 */
+	return RX_DROP_MONITOR;
+}
+
+static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
+					   struct ieee80211_mgmt *mgmt,
+					   size_t len)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *resp;
+
+	if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) {
+		/* Not to own unicast address */
+		return;
+	}
+
+	if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) ||
+	    !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) {
+		/* Not from the current AP or not associated yet. */
+		return;
+	}
+
+	if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) {
+		/* Too short SA Query request frame */
+		return;
+	}
+
+	skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom);
+	if (skb == NULL)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+	resp = (struct ieee80211_mgmt *) skb_put(skb, 24);
+	memset(resp, 0, 24);
+	memcpy(resp->da, mgmt->sa, ETH_ALEN);
+	memcpy(resp->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+	resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
+	skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
+	resp->u.action.category = WLAN_CATEGORY_SA_QUERY;
+	resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE;
+	memcpy(resp->u.action.u.sa_query.trans_id,
+	       mgmt->u.action.u.sa_query.trans_id,
+	       WLAN_SA_QUERY_TR_ID_LEN);
+
+	ieee80211_tx_skb(sdata, skb);
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+
+	/*
+	 * From here on, look only at management frames.
+	 * Data and control frames are already handled,
+	 * and unknown (reserved) frames are useless.
+	 */
+	if (rx->skb->len < 24)
+		return RX_DROP_MONITOR;
+
+	if (!ieee80211_is_mgmt(mgmt->frame_control))
+		return RX_DROP_MONITOR;
+
+	if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
+	    ieee80211_is_beacon(mgmt->frame_control) &&
+	    !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) {
+		int sig = 0;
+
+		if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+			sig = status->signal;
+
+		cfg80211_report_obss_beacon(rx->local->hw.wiphy,
+					    rx->skb->data, rx->skb->len,
+					    status->freq, sig);
+		rx->flags |= IEEE80211_RX_BEACON_REPORTED;
+	}
+
+	if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
+		return RX_DROP_MONITOR;
+
+	if (ieee80211_drop_unencrypted_mgmt(rx))
+		return RX_DROP_UNUSABLE;
+
+	return RX_CONTINUE;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_local *local = rx->local;
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+	int len = rx->skb->len;
+
+	if (!ieee80211_is_action(mgmt->frame_control))
+		return RX_CONTINUE;
+
+	/* drop too small frames */
+	if (len < IEEE80211_MIN_ACTION_SIZE)
+		return RX_DROP_UNUSABLE;
+
+	if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
+	    mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED)
+		return RX_DROP_UNUSABLE;
+
+	if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
+		return RX_DROP_UNUSABLE;
+
+	switch (mgmt->u.action.category) {
+	case WLAN_CATEGORY_HT:
+		/* reject HT action frames from stations not supporting HT */
+		if (!rx->sta->sta.ht_cap.ht_supported)
+			goto invalid;
+
+		if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+		    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
+		    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+		    sdata->vif.type != NL80211_IFTYPE_AP &&
+		    sdata->vif.type != NL80211_IFTYPE_ADHOC)
+			break;
+
+		/* verify action & smps_control/chanwidth are present */
+		if (len < IEEE80211_MIN_ACTION_SIZE + 2)
+			goto invalid;
+
+		switch (mgmt->u.action.u.ht_smps.action) {
+		case WLAN_HT_ACTION_SMPS: {
+			struct ieee80211_supported_band *sband;
+			enum ieee80211_smps_mode smps_mode;
+
+			/* convert to HT capability */
+			switch (mgmt->u.action.u.ht_smps.smps_control) {
+			case WLAN_HT_SMPS_CONTROL_DISABLED:
+				smps_mode = IEEE80211_SMPS_OFF;
+				break;
+			case WLAN_HT_SMPS_CONTROL_STATIC:
+				smps_mode = IEEE80211_SMPS_STATIC;
+				break;
+			case WLAN_HT_SMPS_CONTROL_DYNAMIC:
+				smps_mode = IEEE80211_SMPS_DYNAMIC;
+				break;
+			default:
+				goto invalid;
+			}
+
+			/* if no change do nothing */
+			if (rx->sta->sta.smps_mode == smps_mode)
+				goto handled;
+			rx->sta->sta.smps_mode = smps_mode;
+
+			sband = rx->local->hw.wiphy->bands[status->band];
+
+			rate_control_rate_update(local, sband, rx->sta,
+						 IEEE80211_RC_SMPS_CHANGED);
+			goto handled;
+		}
+		case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
+			struct ieee80211_supported_band *sband;
+			u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
+			enum ieee80211_sta_rx_bandwidth new_bw;
+
+			/* If it doesn't support 40 MHz it can't change ... */
+			if (!(rx->sta->sta.ht_cap.cap &
+					IEEE80211_HT_CAP_SUP_WIDTH_20_40))
+				goto handled;
+
+			if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ)
+				new_bw = IEEE80211_STA_RX_BW_20;
+			else
+				new_bw = ieee80211_sta_cur_vht_bw(rx->sta);
+
+			if (rx->sta->sta.bandwidth == new_bw)
+				goto handled;
+
+			sband = rx->local->hw.wiphy->bands[status->band];
+
+			rate_control_rate_update(local, sband, rx->sta,
+						 IEEE80211_RC_BW_CHANGED);
+			goto handled;
+		}
+		default:
+			goto invalid;
+		}
+
+		break;
+	case WLAN_CATEGORY_PUBLIC:
+		if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+			goto invalid;
+		if (sdata->vif.type != NL80211_IFTYPE_STATION)
+			break;
+		if (!rx->sta)
+			break;
+		if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid))
+			break;
+		if (mgmt->u.action.u.ext_chan_switch.action_code !=
+				WLAN_PUB_ACTION_EXT_CHANSW_ANN)
+			break;
+		if (len < offsetof(struct ieee80211_mgmt,
+				   u.action.u.ext_chan_switch.variable))
+			goto invalid;
+		goto queue;
+	case WLAN_CATEGORY_VHT:
+		if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+		    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
+		    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+		    sdata->vif.type != NL80211_IFTYPE_AP &&
+		    sdata->vif.type != NL80211_IFTYPE_ADHOC)
+			break;
+
+		/* verify action code is present */
+		if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+			goto invalid;
+
+		switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
+		case WLAN_VHT_ACTION_OPMODE_NOTIF: {
+			u8 opmode;
+
+			/* verify opmode is present */
+			if (len < IEEE80211_MIN_ACTION_SIZE + 2)
+				goto invalid;
+
+			opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
+
+			ieee80211_vht_handle_opmode(rx->sdata, rx->sta,
+						    opmode, status->band,
+						    false);
+			goto handled;
+		}
+		default:
+			break;
+		}
+		break;
+	case WLAN_CATEGORY_BACK:
+		if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+		    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
+		    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+		    sdata->vif.type != NL80211_IFTYPE_AP &&
+		    sdata->vif.type != NL80211_IFTYPE_ADHOC)
+			break;
+
+		/* verify action_code is present */
+		if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+			break;
+
+		switch (mgmt->u.action.u.addba_req.action_code) {
+		case WLAN_ACTION_ADDBA_REQ:
+			if (len < (IEEE80211_MIN_ACTION_SIZE +
+				   sizeof(mgmt->u.action.u.addba_req)))
+				goto invalid;
+			break;
+		case WLAN_ACTION_ADDBA_RESP:
+			if (len < (IEEE80211_MIN_ACTION_SIZE +
+				   sizeof(mgmt->u.action.u.addba_resp)))
+				goto invalid;
+			break;
+		case WLAN_ACTION_DELBA:
+			if (len < (IEEE80211_MIN_ACTION_SIZE +
+				   sizeof(mgmt->u.action.u.delba)))
+				goto invalid;
+			break;
+		default:
+			goto invalid;
+		}
+
+		goto queue;
+	case WLAN_CATEGORY_SPECTRUM_MGMT:
+		if (status->band != IEEE80211_BAND_5GHZ)
+			break;
+
+		if (sdata->vif.type != NL80211_IFTYPE_STATION)
+			break;
+
+		/* verify action_code is present */
+		if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+			break;
+
+		switch (mgmt->u.action.u.measurement.action_code) {
+		case WLAN_ACTION_SPCT_MSR_REQ:
+			if (len < (IEEE80211_MIN_ACTION_SIZE +
+				   sizeof(mgmt->u.action.u.measurement)))
+				break;
+			ieee80211_process_measurement_req(sdata, mgmt, len);
+			goto handled;
+		case WLAN_ACTION_SPCT_CHL_SWITCH:
+			if (sdata->vif.type != NL80211_IFTYPE_STATION)
+				break;
+
+			if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid))
+				break;
+
+			goto queue;
+		}
+		break;
+	case WLAN_CATEGORY_SA_QUERY:
+		if (len < (IEEE80211_MIN_ACTION_SIZE +
+			   sizeof(mgmt->u.action.u.sa_query)))
+			break;
+
+		switch (mgmt->u.action.u.sa_query.action) {
+		case WLAN_ACTION_SA_QUERY_REQUEST:
+			if (sdata->vif.type != NL80211_IFTYPE_STATION)
+				break;
+			ieee80211_process_sa_query_req(sdata, mgmt, len);
+			goto handled;
+		}
+		break;
+	case WLAN_CATEGORY_SELF_PROTECTED:
+		if (len < (IEEE80211_MIN_ACTION_SIZE +
+			   sizeof(mgmt->u.action.u.self_prot.action_code)))
+			break;
+
+		switch (mgmt->u.action.u.self_prot.action_code) {
+		case WLAN_SP_MESH_PEERING_OPEN:
+		case WLAN_SP_MESH_PEERING_CLOSE:
+		case WLAN_SP_MESH_PEERING_CONFIRM:
+			if (!ieee80211_vif_is_mesh(&sdata->vif))
+				goto invalid;
+			if (sdata->u.mesh.user_mpm)
+				/* userspace handles this frame */
+				break;
+			goto queue;
+		case WLAN_SP_MGK_INFORM:
+		case WLAN_SP_MGK_ACK:
+			if (!ieee80211_vif_is_mesh(&sdata->vif))
+				goto invalid;
+			break;
+		}
+		break;
+	case WLAN_CATEGORY_MESH_ACTION:
+		if (len < (IEEE80211_MIN_ACTION_SIZE +
+			   sizeof(mgmt->u.action.u.mesh_action.action_code)))
+			break;
+
+		if (!ieee80211_vif_is_mesh(&sdata->vif))
+			break;
+		if (mesh_action_is_path_sel(mgmt) &&
+		    !mesh_path_sel_is_hwmp(sdata))
+			break;
+		goto queue;
+	}
+
+	return RX_CONTINUE;
+
+ invalid:
+	status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM;
+	/* will return in the next handlers */
+	return RX_CONTINUE;
+
+ handled:
+	if (rx->sta)
+		rx->sta->rx_packets++;
+	dev_kfree_skb(rx->skb);
+	return RX_QUEUED;
+
+ queue:
+	rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
+	skb_queue_tail(&sdata->skb_queue, rx->skb);
+	ieee80211_queue_work(&local->hw, &sdata->work);
+	if (rx->sta)
+		rx->sta->rx_packets++;
+	return RX_QUEUED;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+	int sig = 0;
+
+	/* skip known-bad action frames and return them in the next handler */
+	if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM)
+		return RX_CONTINUE;
+
+	/*
+	 * Getting here means the kernel doesn't know how to handle
+	 * it, but maybe userspace does ... include returned frames
+	 * so userspace can register for those to know whether ones
+	 * it transmitted were processed or returned.
+	 */
+
+	if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+		sig = status->signal;
+
+	if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig,
+			     rx->skb->data, rx->skb->len,
+			     GFP_ATOMIC)) {
+		if (rx->sta)
+			rx->sta->rx_packets++;
+		dev_kfree_skb(rx->skb);
+		return RX_QUEUED;
+	}
+
+	return RX_CONTINUE;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_local *local = rx->local;
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
+	struct sk_buff *nskb;
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+
+	if (!ieee80211_is_action(mgmt->frame_control))
+		return RX_CONTINUE;
+
+	/*
+	 * For AP mode, hostapd is responsible for handling any action
+	 * frames that we didn't handle, including returning unknown
+	 * ones. For all other modes we will return them to the sender,
+	 * setting the 0x80 bit in the action category, as required by
+	 * 802.11-2012 9.24.4.
+	 * Newer versions of hostapd shall also use the management frame
+	 * registration mechanisms, but older ones still use cooked
+	 * monitor interfaces so push all frames there.
+	 */
+	if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) &&
+	    (sdata->vif.type == NL80211_IFTYPE_AP ||
+	     sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
+		return RX_DROP_MONITOR;
+
+	if (is_multicast_ether_addr(mgmt->da))
+		return RX_DROP_MONITOR;
+
+	/* do not return rejected action frames */
+	if (mgmt->u.action.category & 0x80)
+		return RX_DROP_UNUSABLE;
+
+	nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0,
+			       GFP_ATOMIC);
+	if (nskb) {
+		struct ieee80211_mgmt *nmgmt = (void *)nskb->data;
+
+		nmgmt->u.action.category |= 0x80;
+		memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN);
+		memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN);
+
+		memset(nskb->cb, 0, sizeof(nskb->cb));
+
+		if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
+			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb);
+
+			info->flags = IEEE80211_TX_CTL_TX_OFFCHAN |
+				      IEEE80211_TX_INTFL_OFFCHAN_TX_OK |
+				      IEEE80211_TX_CTL_NO_CCK_RATE;
+			if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
+				info->hw_queue =
+					local->hw.offchannel_tx_hw_queue;
+		}
+
+		__ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7,
+					    status->band);
+	}
+	dev_kfree_skb(rx->skb);
+	return RX_QUEUED;
+}
+
+static ieee80211_rx_result debug_noinline
+ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_mgmt *mgmt = (void *)rx->skb->data;
+	__le16 stype;
+
+	stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE);
+
+	if (!ieee80211_vif_is_mesh(&sdata->vif) &&
+	    sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+	    sdata->vif.type != NL80211_IFTYPE_STATION)
+		return RX_DROP_MONITOR;
+
+	switch (stype) {
+	case cpu_to_le16(IEEE80211_STYPE_AUTH):
+	case cpu_to_le16(IEEE80211_STYPE_BEACON):
+	case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
+		/* process for all: mesh, mlme, ibss */
+		break;
+	case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
+	case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
+	case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
+	case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
+		if (is_multicast_ether_addr(mgmt->da) &&
+		    !is_broadcast_ether_addr(mgmt->da))
+			return RX_DROP_MONITOR;
+
+		/* process only for station */
+		if (sdata->vif.type != NL80211_IFTYPE_STATION)
+			return RX_DROP_MONITOR;
+		break;
+	case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
+		/* process only for ibss and mesh */
+		if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+		    sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
+			return RX_DROP_MONITOR;
+		break;
+	default:
+		return RX_DROP_MONITOR;
+	}
+
+	/* queue up frame and kick off work to process it */
+	rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME;
+	skb_queue_tail(&sdata->skb_queue, rx->skb);
+	ieee80211_queue_work(&rx->local->hw, &sdata->work);
+	if (rx->sta)
+		rx->sta->rx_packets++;
+
+	return RX_QUEUED;
+}
+
+/* TODO: use IEEE80211_RX_FRAGMENTED */
+static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
+					struct ieee80211_rate *rate)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_local *local = rx->local;
+	struct sk_buff *skb = rx->skb, *skb2;
+	struct net_device *prev_dev = NULL;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	int needed_headroom;
+
+	/*
+	 * If cooked monitor has been processed already, then
+	 * don't do it again. If not, set the flag.
+	 */
+	if (rx->flags & IEEE80211_RX_CMNTR)
+		goto out_free_skb;
+	rx->flags |= IEEE80211_RX_CMNTR;
+
+	/* If there are no cooked monitor interfaces, just free the SKB */
+	if (!local->cooked_mntrs)
+		goto out_free_skb;
+
+	/* room for the radiotap header based on driver features */
+	needed_headroom = ieee80211_rx_radiotap_space(local, status);
+
+	if (skb_headroom(skb) < needed_headroom &&
+	    pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC))
+		goto out_free_skb;
+
+	/* prepend radiotap information */
+	ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom,
+					 false);
+
+	skb_set_mac_header(skb, 0);
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = htons(ETH_P_802_2);
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		if (sdata->vif.type != NL80211_IFTYPE_MONITOR ||
+		    !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
+			continue;
+
+		if (prev_dev) {
+			skb2 = skb_clone(skb, GFP_ATOMIC);
+			if (skb2) {
+				skb2->dev = prev_dev;
+				netif_receive_skb(skb2);
+			}
+		}
+
+		prev_dev = sdata->dev;
+		sdata->dev->stats.rx_packets++;
+		sdata->dev->stats.rx_bytes += skb->len;
+	}
+
+	if (prev_dev) {
+		skb->dev = prev_dev;
+		netif_receive_skb(skb);
+		return;
+	}
+
+ out_free_skb:
+	dev_kfree_skb(skb);
+}
+
+static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx,
+					 ieee80211_rx_result res)
+{
+	switch (res) {
+	case RX_DROP_MONITOR:
+		I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
+		if (rx->sta)
+			rx->sta->rx_dropped++;
+		/* fall through */
+	case RX_CONTINUE: {
+		struct ieee80211_rate *rate = NULL;
+		struct ieee80211_supported_band *sband;
+		struct ieee80211_rx_status *status;
+
+		status = IEEE80211_SKB_RXCB((rx->skb));
+
+		sband = rx->local->hw.wiphy->bands[status->band];
+		if (!(status->flag & RX_FLAG_HT) &&
+		    !(status->flag & RX_FLAG_VHT))
+			rate = &sband->bitrates[status->rate_idx];
+
+		ieee80211_rx_cooked_monitor(rx, rate);
+		break;
+		}
+	case RX_DROP_UNUSABLE:
+		I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
+		if (rx->sta)
+			rx->sta->rx_dropped++;
+		dev_kfree_skb(rx->skb);
+		break;
+	case RX_QUEUED:
+		I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued);
+		break;
+	}
+}
+
+static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx,
+				  struct sk_buff_head *frames)
+{
+	ieee80211_rx_result res = RX_DROP_MONITOR;
+	struct sk_buff *skb;
+
+#define CALL_RXH(rxh)			\
+	do {				\
+		res = rxh(rx);		\
+		if (res != RX_CONTINUE)	\
+			goto rxh_next;  \
+	} while (0);
+
+	spin_lock_bh(&rx->local->rx_path_lock);
+
+	while ((skb = __skb_dequeue(frames))) {
+		/*
+		 * all the other fields are valid across frames
+		 * that belong to an aMPDU since they are on the
+		 * same TID from the same station
+		 */
+		rx->skb = skb;
+
+		CALL_RXH(ieee80211_rx_h_decrypt)
+		CALL_RXH(ieee80211_rx_h_check_more_data)
+		CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll)
+		CALL_RXH(ieee80211_rx_h_sta_process)
+		CALL_RXH(ieee80211_rx_h_defragment)
+		CALL_RXH(ieee80211_rx_h_michael_mic_verify)
+		/* must be after MMIC verify so header is counted in MPDU mic */
+#ifdef CPTCFG_MAC80211_MESH
+		if (ieee80211_vif_is_mesh(&rx->sdata->vif))
+			CALL_RXH(ieee80211_rx_h_mesh_fwding);
+#endif
+		CALL_RXH(ieee80211_rx_h_amsdu)
+		CALL_RXH(ieee80211_rx_h_data)
+
+		/* special treatment -- needs the queue */
+		res = ieee80211_rx_h_ctrl(rx, frames);
+		if (res != RX_CONTINUE)
+			goto rxh_next;
+
+		CALL_RXH(ieee80211_rx_h_mgmt_check)
+		CALL_RXH(ieee80211_rx_h_action)
+		CALL_RXH(ieee80211_rx_h_userspace_mgmt)
+		CALL_RXH(ieee80211_rx_h_action_return)
+		CALL_RXH(ieee80211_rx_h_mgmt)
+
+ rxh_next:
+		ieee80211_rx_handlers_result(rx, res);
+
+#undef CALL_RXH
+	}
+
+	spin_unlock_bh(&rx->local->rx_path_lock);
+}
+
+static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx)
+{
+	struct sk_buff_head reorder_release;
+	ieee80211_rx_result res = RX_DROP_MONITOR;
+
+	__skb_queue_head_init(&reorder_release);
+
+#define CALL_RXH(rxh)			\
+	do {				\
+		res = rxh(rx);		\
+		if (res != RX_CONTINUE)	\
+			goto rxh_next;  \
+	} while (0);
+
+	CALL_RXH(ieee80211_rx_h_check)
+
+	ieee80211_rx_reorder_ampdu(rx, &reorder_release);
+
+	ieee80211_rx_handlers(rx, &reorder_release);
+	return;
+
+ rxh_next:
+	ieee80211_rx_handlers_result(rx, res);
+
+#undef CALL_RXH
+}
+
+/*
+ * This function makes calls into the RX path, therefore
+ * it has to be invoked under RCU read lock.
+ */
+void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid)
+{
+	struct sk_buff_head frames;
+	struct ieee80211_rx_data rx = {
+		.sta = sta,
+		.sdata = sta->sdata,
+		.local = sta->local,
+		/* This is OK -- must be QoS data frame */
+		.security_idx = tid,
+		.seqno_idx = tid,
+		.flags = 0,
+	};
+	struct tid_ampdu_rx *tid_agg_rx;
+
+	tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
+	if (!tid_agg_rx)
+		return;
+
+	__skb_queue_head_init(&frames);
+
+	spin_lock(&tid_agg_rx->reorder_lock);
+	ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames);
+	spin_unlock(&tid_agg_rx->reorder_lock);
+
+	ieee80211_rx_handlers(&rx, &frames);
+}
+
+/* main receive path */
+
+static int prepare_for_handlers(struct ieee80211_rx_data *rx,
+				struct ieee80211_hdr *hdr)
+{
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type);
+	int multicast = is_multicast_ether_addr(hdr->addr1);
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_STATION:
+		if (!bssid && !sdata->u.mgd.use_4addr)
+			return 0;
+		if (!multicast &&
+		    !ether_addr_equal(sdata->vif.addr, hdr->addr1)) {
+			if (!(sdata->dev->flags & IFF_PROMISC) ||
+			    sdata->u.mgd.use_4addr)
+				return 0;
+			status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
+		}
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		if (!bssid)
+			return 0;
+		if (ether_addr_equal(sdata->vif.addr, hdr->addr2) ||
+		    ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2))
+			return 0;
+		if (ieee80211_is_beacon(hdr->frame_control)) {
+			return 1;
+		} else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) {
+			return 0;
+		} else if (!multicast &&
+			   !ether_addr_equal(sdata->vif.addr, hdr->addr1)) {
+			if (!(sdata->dev->flags & IFF_PROMISC))
+				return 0;
+			status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
+		} else if (!rx->sta) {
+			int rate_idx;
+			if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT))
+				rate_idx = 0; /* TODO: HT/VHT rates */
+			else
+				rate_idx = status->rate_idx;
+			ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2,
+						 BIT(rate_idx));
+		}
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+		if (!multicast &&
+		    !ether_addr_equal(sdata->vif.addr, hdr->addr1)) {
+			if (!(sdata->dev->flags & IFF_PROMISC))
+				return 0;
+
+			status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
+		}
+		break;
+	case NL80211_IFTYPE_AP_VLAN:
+	case NL80211_IFTYPE_AP:
+		if (!bssid) {
+			if (!ether_addr_equal(sdata->vif.addr, hdr->addr1))
+				return 0;
+		} else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) {
+			/*
+			 * Accept public action frames even when the
+			 * BSSID doesn't match, this is used for P2P
+			 * and location updates. Note that mac80211
+			 * itself never looks at these frames.
+			 */
+			if (!multicast &&
+			    !ether_addr_equal(sdata->vif.addr, hdr->addr1))
+				return 0;
+			if (ieee80211_is_public_action(hdr, skb->len))
+				return 1;
+			if (!ieee80211_is_beacon(hdr->frame_control))
+				return 0;
+			status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
+		}
+		break;
+	case NL80211_IFTYPE_WDS:
+		if (bssid || !ieee80211_is_data(hdr->frame_control))
+			return 0;
+		if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2))
+			return 0;
+		break;
+	case NL80211_IFTYPE_P2P_DEVICE:
+		if (!ieee80211_is_public_action(hdr, skb->len) &&
+		    !ieee80211_is_probe_req(hdr->frame_control) &&
+		    !ieee80211_is_probe_resp(hdr->frame_control) &&
+		    !ieee80211_is_beacon(hdr->frame_control))
+			return 0;
+		if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) &&
+		    !multicast)
+			status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
+		break;
+	default:
+		/* should never get here */
+		WARN_ON_ONCE(1);
+		break;
+	}
+
+	return 1;
+}
+
+/*
+ * This function returns whether or not the SKB
+ * was destined for RX processing or not, which,
+ * if consume is true, is equivalent to whether
+ * or not the skb was consumed.
+ */
+static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx,
+					    struct sk_buff *skb, bool consume)
+{
+	struct ieee80211_local *local = rx->local;
+	struct ieee80211_sub_if_data *sdata = rx->sdata;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_hdr *hdr = (void *)skb->data;
+	int prepares;
+
+	rx->skb = skb;
+	status->rx_flags |= IEEE80211_RX_RA_MATCH;
+	prepares = prepare_for_handlers(rx, hdr);
+
+	if (!prepares)
+		return false;
+
+	if (!consume) {
+		skb = skb_copy(skb, GFP_ATOMIC);
+		if (!skb) {
+			if (net_ratelimit())
+				wiphy_debug(local->hw.wiphy,
+					"failed to copy skb for %s\n",
+					sdata->name);
+			return true;
+		}
+
+		rx->skb = skb;
+	}
+
+	ieee80211_invoke_rx_handlers(rx);
+	return true;
+}
+
+/*
+ * This is the actual Rx frames handler. as it blongs to Rx path it must
+ * be called with rcu_read_lock protection.
+ */
+static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
+					 struct sk_buff *skb)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_hdr *hdr;
+	__le16 fc;
+	struct ieee80211_rx_data rx;
+	struct ieee80211_sub_if_data *prev;
+	struct sta_info *sta, *tmp, *prev_sta;
+	int err = 0;
+
+	fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
+	memset(&rx, 0, sizeof(rx));
+	rx.skb = skb;
+	rx.local = local;
+
+	if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
+		local->dot11ReceivedFragmentCount++;
+
+	if (ieee80211_is_mgmt(fc)) {
+		/* drop frame if too short for header */
+		if (skb->len < ieee80211_hdrlen(fc))
+			err = -ENOBUFS;
+		else
+			err = skb_linearize(skb);
+	} else {
+		err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
+	}
+
+	if (err) {
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	hdr = (struct ieee80211_hdr *)skb->data;
+	ieee80211_parse_qos(&rx);
+	ieee80211_verify_alignment(&rx);
+
+	if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) ||
+		     ieee80211_is_beacon(hdr->frame_control)))
+		ieee80211_scan_rx(local, skb);
+
+	if (ieee80211_is_data(fc)) {
+		prev_sta = NULL;
+
+		for_each_sta_info(local, hdr->addr2, sta, tmp) {
+			if (!prev_sta) {
+				prev_sta = sta;
+				continue;
+			}
+
+			rx.sta = prev_sta;
+			rx.sdata = prev_sta->sdata;
+			ieee80211_prepare_and_rx_handle(&rx, skb, false);
+
+			prev_sta = sta;
+		}
+
+		if (prev_sta) {
+			rx.sta = prev_sta;
+			rx.sdata = prev_sta->sdata;
+
+			if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
+				return;
+			goto out;
+		}
+	}
+
+	prev = NULL;
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
+		    sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+			continue;
+
+		/*
+		 * frame is destined for this interface, but if it's
+		 * not also for the previous one we handle that after
+		 * the loop to avoid copying the SKB once too much
+		 */
+
+		if (!prev) {
+			prev = sdata;
+			continue;
+		}
+
+		rx.sta = sta_info_get_bss(prev, hdr->addr2);
+		rx.sdata = prev;
+		ieee80211_prepare_and_rx_handle(&rx, skb, false);
+
+		prev = sdata;
+	}
+
+	if (prev) {
+		rx.sta = sta_info_get_bss(prev, hdr->addr2);
+		rx.sdata = prev;
+
+		if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
+			return;
+	}
+
+ out:
+	dev_kfree_skb(skb);
+}
+
+/*
+ * This is the receive path handler. It is called by a low level driver when an
+ * 802.11 MPDU is received from the hardware.
+ */
+void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_rate *rate = NULL;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+
+	WARN_ON_ONCE(softirq_count() == 0);
+
+	if (WARN_ON(status->band >= IEEE80211_NUM_BANDS))
+		goto drop;
+
+	sband = local->hw.wiphy->bands[status->band];
+	if (WARN_ON(!sband))
+		goto drop;
+
+	/*
+	 * If we're suspending, it is possible although not too likely
+	 * that we'd be receiving frames after having already partially
+	 * quiesced the stack. We can't process such frames then since
+	 * that might, for example, cause stations to be added or other
+	 * driver callbacks be invoked.
+	 */
+	if (unlikely(local->quiescing || local->suspended))
+		goto drop;
+
+	/* We might be during a HW reconfig, prevent Rx for the same reason */
+	if (unlikely(local->in_reconfig))
+		goto drop;
+
+	/*
+	 * The same happens when we're not even started,
+	 * but that's worth a warning.
+	 */
+	if (WARN_ON(!local->started))
+		goto drop;
+
+	if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) {
+		/*
+		 * Validate the rate, unless a PLCP error means that
+		 * we probably can't have a valid rate here anyway.
+		 */
+
+		if (status->flag & RX_FLAG_HT) {
+			/*
+			 * rate_idx is MCS index, which can be [0-76]
+			 * as documented on:
+			 *
+			 * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
+			 *
+			 * Anything else would be some sort of driver or
+			 * hardware error. The driver should catch hardware
+			 * errors.
+			 */
+			if (WARN(status->rate_idx > 76,
+				 "Rate marked as an HT rate but passed "
+				 "status->rate_idx is not "
+				 "an MCS index [0-76]: %d (0x%02x)\n",
+				 status->rate_idx,
+				 status->rate_idx))
+				goto drop;
+		} else if (status->flag & RX_FLAG_VHT) {
+			if (WARN_ONCE(status->rate_idx > 9 ||
+				      !status->vht_nss ||
+				      status->vht_nss > 8,
+				      "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
+				      status->rate_idx, status->vht_nss))
+				goto drop;
+		} else {
+			if (WARN_ON(status->rate_idx >= sband->n_bitrates))
+				goto drop;
+			rate = &sband->bitrates[status->rate_idx];
+		}
+	}
+
+	status->rx_flags = 0;
+
+	/*
+	 * key references and virtual interfaces are protected using RCU
+	 * and this requires that we are in a read-side RCU section during
+	 * receive processing
+	 */
+	rcu_read_lock();
+
+	/*
+	 * Frames with failed FCS/PLCP checksum are not returned,
+	 * all other frames are returned without radiotap header
+	 * if it was previously present.
+	 * Also, frames with less than 16 bytes are dropped.
+	 */
+	skb = ieee80211_rx_monitor(local, skb, rate);
+	if (!skb) {
+		rcu_read_unlock();
+		return;
+	}
+
+	ieee80211_tpt_led_trig_rx(local,
+			((struct ieee80211_hdr *)skb->data)->frame_control,
+			skb->len);
+	__ieee80211_rx_handle_packet(hw, skb);
+
+	rcu_read_unlock();
+
+	return;
+ drop:
+	kfree_skb(skb);
+}
+EXPORT_SYMBOL(ieee80211_rx);
+
+/* This is a version of the rx handler that can be called from hard irq
+ * context. Post the skb on the queue and schedule the tasklet */
+void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
+
+	skb->pkt_type = IEEE80211_RX_MSG;
+	skb_queue_tail(&local->skb_queue, skb);
+	tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_rx_irqsafe);
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
new file mode 100644
index 0000000..eb03337
--- /dev/null
+++ b/net/mac80211/scan.c
@@ -0,0 +1,1029 @@
+/*
+ * Scanning implementation
+ *
+ * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/pm_qos.h>
+#include <net/sch_generic.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "mesh.h"
+
+#define IEEE80211_PROBE_DELAY (HZ / 33)
+#define IEEE80211_CHANNEL_TIME (HZ / 33)
+#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 9)
+
+void ieee80211_rx_bss_put(struct ieee80211_local *local,
+			  struct ieee80211_bss *bss)
+{
+	if (!bss)
+		return;
+	cfg80211_put_bss(local->hw.wiphy,
+			 container_of((void *)bss, struct cfg80211_bss, priv));
+}
+
+static bool is_uapsd_supported(struct ieee802_11_elems *elems)
+{
+	u8 qos_info;
+
+	if (elems->wmm_info && elems->wmm_info_len == 7
+	    && elems->wmm_info[5] == 1)
+		qos_info = elems->wmm_info[6];
+	else if (elems->wmm_param && elems->wmm_param_len == 24
+		 && elems->wmm_param[5] == 1)
+		qos_info = elems->wmm_param[6];
+	else
+		/* no valid wmm information or parameter element found */
+		return false;
+
+	return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD;
+}
+
+struct ieee80211_bss *
+ieee80211_bss_info_update(struct ieee80211_local *local,
+			  struct ieee80211_rx_status *rx_status,
+			  struct ieee80211_mgmt *mgmt, size_t len,
+			  struct ieee802_11_elems *elems,
+			  struct ieee80211_channel *channel)
+{
+	bool beacon = ieee80211_is_beacon(mgmt->frame_control);
+	struct cfg80211_bss *cbss;
+	struct ieee80211_bss *bss;
+	int clen, srlen;
+	s32 signal = 0;
+
+	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
+		signal = rx_status->signal * 100;
+	else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
+		signal = (rx_status->signal * 100) / local->hw.max_signal;
+
+	cbss = cfg80211_inform_bss_frame(local->hw.wiphy, channel,
+					 mgmt, len, signal, GFP_ATOMIC);
+	if (!cbss)
+		return NULL;
+
+	bss = (void *)cbss->priv;
+
+	if (beacon)
+		bss->device_ts_beacon = rx_status->device_timestamp;
+	else
+		bss->device_ts_presp = rx_status->device_timestamp;
+
+	if (elems->parse_error) {
+		if (beacon)
+			bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON;
+		else
+			bss->corrupt_data |= IEEE80211_BSS_CORRUPT_PROBE_RESP;
+	} else {
+		if (beacon)
+			bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_BEACON;
+		else
+			bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_PROBE_RESP;
+	}
+
+	/* save the ERP value so that it is available at association time */
+	if (elems->erp_info && (!elems->parse_error ||
+				!(bss->valid_data & IEEE80211_BSS_VALID_ERP))) {
+		bss->erp_value = elems->erp_info[0];
+		bss->has_erp_value = true;
+		if (!elems->parse_error)
+			bss->valid_data |= IEEE80211_BSS_VALID_ERP;
+	}
+
+	/* replace old supported rates if we get new values */
+	if (!elems->parse_error ||
+	    !(bss->valid_data & IEEE80211_BSS_VALID_RATES)) {
+		srlen = 0;
+		if (elems->supp_rates) {
+			clen = IEEE80211_MAX_SUPP_RATES;
+			if (clen > elems->supp_rates_len)
+				clen = elems->supp_rates_len;
+			memcpy(bss->supp_rates, elems->supp_rates, clen);
+			srlen += clen;
+		}
+		if (elems->ext_supp_rates) {
+			clen = IEEE80211_MAX_SUPP_RATES - srlen;
+			if (clen > elems->ext_supp_rates_len)
+				clen = elems->ext_supp_rates_len;
+			memcpy(bss->supp_rates + srlen, elems->ext_supp_rates,
+			       clen);
+			srlen += clen;
+		}
+		if (srlen) {
+			bss->supp_rates_len = srlen;
+			if (!elems->parse_error)
+				bss->valid_data |= IEEE80211_BSS_VALID_RATES;
+		}
+	}
+
+	if (!elems->parse_error ||
+	    !(bss->valid_data & IEEE80211_BSS_VALID_WMM)) {
+		bss->wmm_used = elems->wmm_param || elems->wmm_info;
+		bss->uapsd_supported = is_uapsd_supported(elems);
+		if (!elems->parse_error)
+			bss->valid_data |= IEEE80211_BSS_VALID_WMM;
+	}
+
+	return bss;
+}
+
+void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
+{
+	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_sub_if_data *sdata1, *sdata2;
+	struct ieee80211_mgmt *mgmt = (void *)skb->data;
+	struct ieee80211_bss *bss;
+	u8 *elements;
+	struct ieee80211_channel *channel;
+	size_t baselen;
+	struct ieee802_11_elems elems;
+
+	if (skb->len < 24 ||
+	    (!ieee80211_is_probe_resp(mgmt->frame_control) &&
+	     !ieee80211_is_beacon(mgmt->frame_control)))
+		return;
+
+	sdata1 = rcu_dereference(local->scan_sdata);
+	sdata2 = rcu_dereference(local->sched_scan_sdata);
+
+	if (likely(!sdata1 && !sdata2))
+		return;
+
+	if (ieee80211_is_probe_resp(mgmt->frame_control)) {
+		/* ignore ProbeResp to foreign address */
+		if ((!sdata1 || !ether_addr_equal(mgmt->da, sdata1->vif.addr)) &&
+		    (!sdata2 || !ether_addr_equal(mgmt->da, sdata2->vif.addr)))
+			return;
+
+		elements = mgmt->u.probe_resp.variable;
+		baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
+	} else {
+		baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable);
+		elements = mgmt->u.beacon.variable;
+	}
+
+	if (baselen > skb->len)
+		return;
+
+	ieee802_11_parse_elems(elements, skb->len - baselen, false, &elems);
+
+	channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
+
+	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+		return;
+
+	bss = ieee80211_bss_info_update(local, rx_status,
+					mgmt, skb->len, &elems,
+					channel);
+	if (bss)
+		ieee80211_rx_bss_put(local, bss);
+}
+
+/* return false if no more work */
+static bool ieee80211_prep_hw_scan(struct ieee80211_local *local)
+{
+	struct cfg80211_scan_request *req = local->scan_req;
+	enum ieee80211_band band;
+	int i, ielen, n_chans;
+
+	if (test_bit(SCAN_HW_CANCELLED, &local->scanning))
+		return false;
+
+	do {
+		if (local->hw_scan_band == IEEE80211_NUM_BANDS)
+			return false;
+
+		band = local->hw_scan_band;
+		n_chans = 0;
+		for (i = 0; i < req->n_channels; i++) {
+			if (req->channels[i]->band == band) {
+				local->hw_scan_req->channels[n_chans] =
+							req->channels[i];
+				n_chans++;
+			}
+		}
+
+		local->hw_scan_band++;
+	} while (!n_chans);
+
+	local->hw_scan_req->n_channels = n_chans;
+
+	ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->ie,
+					 local->hw_scan_ies_bufsize,
+					 req->ie, req->ie_len, band,
+					 req->rates[band], 0);
+	local->hw_scan_req->ie_len = ielen;
+	local->hw_scan_req->no_cck = req->no_cck;
+
+	return true;
+}
+
+static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted,
+				       bool was_hw_scan)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	lockdep_assert_held(&local->mtx);
+
+	/*
+	 * It's ok to abort a not-yet-running scan (that
+	 * we have one at all will be verified by checking
+	 * local->scan_req next), but not to complete it
+	 * successfully.
+	 */
+	if (WARN_ON(!local->scanning && !aborted))
+		aborted = true;
+
+	if (WARN_ON(!local->scan_req))
+		return;
+
+	if (was_hw_scan && !aborted && ieee80211_prep_hw_scan(local)) {
+		int rc;
+
+		rc = drv_hw_scan(local,
+			rcu_dereference_protected(local->scan_sdata,
+						  lockdep_is_held(&local->mtx)),
+			local->hw_scan_req);
+
+		if (rc == 0)
+			return;
+	}
+
+	kfree(local->hw_scan_req);
+	local->hw_scan_req = NULL;
+
+	if (local->scan_req != local->int_scan_req)
+		cfg80211_scan_done(local->scan_req, aborted);
+	local->scan_req = NULL;
+	rcu_assign_pointer(local->scan_sdata, NULL);
+
+	local->scanning = 0;
+	local->scan_channel = NULL;
+
+	/* Set power back to normal operating levels. */
+	ieee80211_hw_config(local, 0);
+
+	if (!was_hw_scan) {
+		ieee80211_configure_filter(local);
+		drv_sw_scan_complete(local);
+		ieee80211_offchannel_return(local);
+	}
+
+	ieee80211_recalc_idle(local);
+
+	ieee80211_mlme_notify_scan_completed(local);
+	ieee80211_ibss_notify_scan_completed(local);
+	ieee80211_mesh_notify_scan_completed(local);
+	ieee80211_start_next_roc(local);
+}
+
+void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_scan_completed(local, aborted);
+
+	set_bit(SCAN_COMPLETED, &local->scanning);
+	if (aborted)
+		set_bit(SCAN_ABORTED, &local->scanning);
+	ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
+}
+EXPORT_SYMBOL(ieee80211_scan_completed);
+
+static int ieee80211_start_sw_scan(struct ieee80211_local *local)
+{
+	/* Software scan is not supported in multi-channel cases */
+	if (local->use_chanctx)
+		return -EOPNOTSUPP;
+
+	/*
+	 * Hardware/driver doesn't support hw_scan, so use software
+	 * scanning instead. First send a nullfunc frame with power save
+	 * bit on so that AP will buffer the frames for us while we are not
+	 * listening, then send probe requests to each channel and wait for
+	 * the responses. After all channels are scanned, tune back to the
+	 * original channel and send a nullfunc frame with power save bit
+	 * off to trigger the AP to send us all the buffered frames.
+	 *
+	 * Note that while local->sw_scanning is true everything else but
+	 * nullfunc frames and probe requests will be dropped in
+	 * ieee80211_tx_h_check_assoc().
+	 */
+	drv_sw_scan_start(local);
+
+	local->leave_oper_channel_time = jiffies;
+	local->next_scan_state = SCAN_DECISION;
+	local->scan_channel_idx = 0;
+
+	ieee80211_offchannel_stop_vifs(local);
+
+	/* ensure nullfunc is transmitted before leaving operating channel */
+	ieee80211_flush_queues(local, NULL);
+
+	ieee80211_configure_filter(local);
+
+	/* We need to set power level at maximum rate for scanning. */
+	ieee80211_hw_config(local, 0);
+
+	ieee80211_queue_delayed_work(&local->hw,
+				     &local->scan_work, 0);
+
+	return 0;
+}
+
+static bool ieee80211_can_scan(struct ieee80211_local *local,
+			       struct ieee80211_sub_if_data *sdata)
+{
+	if (local->radar_detect_enabled)
+		return false;
+
+	if (!list_empty(&local->roc_list))
+		return false;
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+	    sdata->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
+				  IEEE80211_STA_CONNECTION_POLL))
+		return false;
+
+	return true;
+}
+
+void ieee80211_run_deferred_scan(struct ieee80211_local *local)
+{
+	lockdep_assert_held(&local->mtx);
+
+	if (!local->scan_req || local->scanning)
+		return;
+
+	if (!ieee80211_can_scan(local,
+				rcu_dereference_protected(
+					local->scan_sdata,
+					lockdep_is_held(&local->mtx))))
+		return;
+
+	ieee80211_queue_delayed_work(&local->hw, &local->scan_work,
+				     round_jiffies_relative(0));
+}
+
+static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
+					    unsigned long *next_delay)
+{
+	int i;
+	struct ieee80211_sub_if_data *sdata;
+	enum ieee80211_band band = local->hw.conf.chandef.chan->band;
+	u32 tx_flags;
+
+	tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
+	if (local->scan_req->no_cck)
+		tx_flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
+
+	sdata = rcu_dereference_protected(local->scan_sdata,
+					  lockdep_is_held(&local->mtx));
+
+	for (i = 0; i < local->scan_req->n_ssids; i++)
+		ieee80211_send_probe_req(
+			sdata, NULL,
+			local->scan_req->ssids[i].ssid,
+			local->scan_req->ssids[i].ssid_len,
+			local->scan_req->ie, local->scan_req->ie_len,
+			local->scan_req->rates[band], false,
+			tx_flags, local->hw.conf.chandef.chan, true);
+
+	/*
+	 * After sending probe requests, wait for probe responses
+	 * on the channel.
+	 */
+	*next_delay = IEEE80211_CHANNEL_TIME;
+	local->next_scan_state = SCAN_DECISION;
+}
+
+static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
+				  struct cfg80211_scan_request *req)
+{
+	struct ieee80211_local *local = sdata->local;
+	int rc;
+
+	lockdep_assert_held(&local->mtx);
+
+	if (local->scan_req)
+		return -EBUSY;
+
+	if (!ieee80211_can_scan(local, sdata)) {
+		/* wait for the work to finish/time out */
+		local->scan_req = req;
+		rcu_assign_pointer(local->scan_sdata, sdata);
+		return 0;
+	}
+
+	if (local->ops->hw_scan) {
+		u8 *ies;
+
+		local->hw_scan_ies_bufsize = 2 + IEEE80211_MAX_SSID_LEN +
+					     local->scan_ies_len +
+					     req->ie_len;
+		local->hw_scan_req = kmalloc(
+				sizeof(*local->hw_scan_req) +
+				req->n_channels * sizeof(req->channels[0]) +
+				local->hw_scan_ies_bufsize, GFP_KERNEL);
+		if (!local->hw_scan_req)
+			return -ENOMEM;
+
+		local->hw_scan_req->ssids = req->ssids;
+		local->hw_scan_req->n_ssids = req->n_ssids;
+		ies = (u8 *)local->hw_scan_req +
+			sizeof(*local->hw_scan_req) +
+			req->n_channels * sizeof(req->channels[0]);
+		local->hw_scan_req->ie = ies;
+		local->hw_scan_req->flags = req->flags;
+
+		local->hw_scan_band = 0;
+
+		/*
+		 * After allocating local->hw_scan_req, we must
+		 * go through until ieee80211_prep_hw_scan(), so
+		 * anything that might be changed here and leave
+		 * this function early must not go after this
+		 * allocation.
+		 */
+	}
+
+	local->scan_req = req;
+	rcu_assign_pointer(local->scan_sdata, sdata);
+
+	if (local->ops->hw_scan) {
+		__set_bit(SCAN_HW_SCANNING, &local->scanning);
+	} else if ((req->n_channels == 1) &&
+		   (req->channels[0] == local->_oper_chandef.chan)) {
+		/*
+		 * If we are scanning only on the operating channel
+		 * then we do not need to stop normal activities
+		 */
+		unsigned long next_delay;
+
+		__set_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
+
+		ieee80211_recalc_idle(local);
+
+		/* Notify driver scan is starting, keep order of operations
+		 * same as normal software scan, in case that matters. */
+		drv_sw_scan_start(local);
+
+		ieee80211_configure_filter(local); /* accept probe-responses */
+
+		/* We need to ensure power level is at max for scanning. */
+		ieee80211_hw_config(local, 0);
+
+		if ((req->channels[0]->flags &
+		     IEEE80211_CHAN_PASSIVE_SCAN) ||
+		    !local->scan_req->n_ssids) {
+			next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
+		} else {
+			ieee80211_scan_state_send_probe(local, &next_delay);
+			next_delay = IEEE80211_CHANNEL_TIME;
+		}
+
+		/* Now, just wait a bit and we are all done! */
+		ieee80211_queue_delayed_work(&local->hw, &local->scan_work,
+					     next_delay);
+		return 0;
+	} else {
+		/* Do normal software scan */
+		__set_bit(SCAN_SW_SCANNING, &local->scanning);
+	}
+
+	ieee80211_recalc_idle(local);
+
+	if (local->ops->hw_scan) {
+		WARN_ON(!ieee80211_prep_hw_scan(local));
+		rc = drv_hw_scan(local, sdata, local->hw_scan_req);
+	} else
+		rc = ieee80211_start_sw_scan(local);
+
+	if (rc) {
+		kfree(local->hw_scan_req);
+		local->hw_scan_req = NULL;
+		local->scanning = 0;
+
+		ieee80211_recalc_idle(local);
+
+		local->scan_req = NULL;
+		rcu_assign_pointer(local->scan_sdata, NULL);
+	}
+
+	return rc;
+}
+
+static unsigned long
+ieee80211_scan_get_channel_time(struct ieee80211_channel *chan)
+{
+	/*
+	 * TODO: channel switching also consumes quite some time,
+	 * add that delay as well to get a better estimation
+	 */
+	if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
+		return IEEE80211_PASSIVE_CHANNEL_TIME;
+	return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME;
+}
+
+static void ieee80211_scan_state_decision(struct ieee80211_local *local,
+					  unsigned long *next_delay)
+{
+	bool associated = false;
+	bool tx_empty = true;
+	bool bad_latency;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_channel *next_chan;
+	enum mac80211_scan_state next_scan_state;
+
+	/*
+	 * check if at least one STA interface is associated,
+	 * check if at least one STA interface has pending tx frames
+	 * and grab the lowest used beacon interval
+	 */
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+			if (sdata->u.mgd.associated) {
+				associated = true;
+
+				if (!qdisc_all_tx_empty(sdata->dev)) {
+					tx_empty = false;
+					break;
+				}
+			}
+		}
+	}
+	mutex_unlock(&local->iflist_mtx);
+
+	next_chan = local->scan_req->channels[local->scan_channel_idx];
+
+	/*
+	 * we're currently scanning a different channel, let's
+	 * see if we can scan another channel without interfering
+	 * with the current traffic situation.
+	 *
+	 * Keep good latency, do not stay off-channel more than 125 ms.
+	 */
+
+	bad_latency = time_after(jiffies +
+				 ieee80211_scan_get_channel_time(next_chan),
+				 local->leave_oper_channel_time + HZ / 8);
+
+	if (associated && !tx_empty) {
+		if (local->scan_req->flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
+			next_scan_state = SCAN_ABORT;
+		else
+			next_scan_state = SCAN_SUSPEND;
+	} else if (associated && bad_latency) {
+		next_scan_state = SCAN_SUSPEND;
+	} else {
+		next_scan_state = SCAN_SET_CHANNEL;
+	}
+
+	local->next_scan_state = next_scan_state;
+
+	*next_delay = 0;
+}
+
+static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
+					     unsigned long *next_delay)
+{
+	int skip;
+	struct ieee80211_channel *chan;
+
+	skip = 0;
+	chan = local->scan_req->channels[local->scan_channel_idx];
+
+	local->scan_channel = chan;
+
+	if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
+		skip = 1;
+
+	/* advance state machine to next channel/band */
+	local->scan_channel_idx++;
+
+	if (skip) {
+		/* if we skip this channel return to the decision state */
+		local->next_scan_state = SCAN_DECISION;
+		return;
+	}
+
+	/*
+	 * Probe delay is used to update the NAV, cf. 11.1.3.2.2
+	 * (which unfortunately doesn't say _why_ step a) is done,
+	 * but it waits for the probe delay or until a frame is
+	 * received - and the received frame would update the NAV).
+	 * For now, we do not support waiting until a frame is
+	 * received.
+	 *
+	 * In any case, it is not necessary for a passive scan.
+	 */
+	if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN ||
+	    !local->scan_req->n_ssids) {
+		*next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
+		local->next_scan_state = SCAN_DECISION;
+		return;
+	}
+
+	/* active scan, send probes */
+	*next_delay = IEEE80211_PROBE_DELAY;
+	local->next_scan_state = SCAN_SEND_PROBE;
+}
+
+static void ieee80211_scan_state_suspend(struct ieee80211_local *local,
+					 unsigned long *next_delay)
+{
+	/* switch back to the operating channel */
+	local->scan_channel = NULL;
+	ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
+
+	/* disable PS */
+	ieee80211_offchannel_return(local);
+
+	*next_delay = HZ / 5;
+	/* afterwards, resume scan & go to next channel */
+	local->next_scan_state = SCAN_RESUME;
+}
+
+static void ieee80211_scan_state_resume(struct ieee80211_local *local,
+					unsigned long *next_delay)
+{
+	ieee80211_offchannel_stop_vifs(local);
+
+	if (local->ops->flush) {
+		ieee80211_flush_queues(local, NULL);
+		*next_delay = 0;
+	} else
+		*next_delay = HZ / 10;
+
+	/* remember when we left the operating channel */
+	local->leave_oper_channel_time = jiffies;
+
+	/* advance to the next channel to be scanned */
+	local->next_scan_state = SCAN_SET_CHANNEL;
+}
+
+void ieee80211_scan_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, scan_work.work);
+	struct ieee80211_sub_if_data *sdata;
+	unsigned long next_delay = 0;
+	bool aborted, hw_scan;
+
+	mutex_lock(&local->mtx);
+
+	sdata = rcu_dereference_protected(local->scan_sdata,
+					  lockdep_is_held(&local->mtx));
+
+	/* When scanning on-channel, the first-callback means completed. */
+	if (test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) {
+		aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning);
+		goto out_complete;
+	}
+
+	if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) {
+		aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning);
+		goto out_complete;
+	}
+
+	if (!sdata || !local->scan_req)
+		goto out;
+
+	if (local->scan_req && !local->scanning) {
+		struct cfg80211_scan_request *req = local->scan_req;
+		int rc;
+
+		local->scan_req = NULL;
+		rcu_assign_pointer(local->scan_sdata, NULL);
+
+		rc = __ieee80211_start_scan(sdata, req);
+		if (rc) {
+			/* need to complete scan in cfg80211 */
+			local->scan_req = req;
+			aborted = true;
+			goto out_complete;
+		} else
+			goto out;
+	}
+
+	/*
+	 * Avoid re-scheduling when the sdata is going away.
+	 */
+	if (!ieee80211_sdata_running(sdata)) {
+		aborted = true;
+		goto out_complete;
+	}
+
+	/*
+	 * as long as no delay is required advance immediately
+	 * without scheduling a new work
+	 */
+	do {
+		if (!ieee80211_sdata_running(sdata)) {
+			aborted = true;
+			goto out_complete;
+		}
+
+		switch (local->next_scan_state) {
+		case SCAN_DECISION:
+			/* if no more bands/channels left, complete scan */
+			if (local->scan_channel_idx >= local->scan_req->n_channels) {
+				aborted = false;
+				goto out_complete;
+			}
+			ieee80211_scan_state_decision(local, &next_delay);
+			break;
+		case SCAN_SET_CHANNEL:
+			ieee80211_scan_state_set_channel(local, &next_delay);
+			break;
+		case SCAN_SEND_PROBE:
+			ieee80211_scan_state_send_probe(local, &next_delay);
+			break;
+		case SCAN_SUSPEND:
+			ieee80211_scan_state_suspend(local, &next_delay);
+			break;
+		case SCAN_RESUME:
+			ieee80211_scan_state_resume(local, &next_delay);
+			break;
+		case SCAN_ABORT:
+			aborted = true;
+			goto out_complete;
+		}
+	} while (next_delay == 0);
+
+	ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay);
+	goto out;
+
+out_complete:
+	hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning);
+	__ieee80211_scan_completed(&local->hw, aborted, hw_scan);
+out:
+	mutex_unlock(&local->mtx);
+}
+
+int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
+			   struct cfg80211_scan_request *req)
+{
+	int res;
+
+	mutex_lock(&sdata->local->mtx);
+	res = __ieee80211_start_scan(sdata, req);
+	mutex_unlock(&sdata->local->mtx);
+
+	return res;
+}
+
+int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
+				const u8 *ssid, u8 ssid_len,
+				struct ieee80211_channel *chan)
+{
+	struct ieee80211_local *local = sdata->local;
+	int ret = -EBUSY;
+	enum ieee80211_band band;
+
+	mutex_lock(&local->mtx);
+
+	/* busy scanning */
+	if (local->scan_req)
+		goto unlock;
+
+	/* fill internal scan request */
+	if (!chan) {
+		int i, max_n;
+		int n_ch = 0;
+
+		for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+			if (!local->hw.wiphy->bands[band])
+				continue;
+
+			max_n = local->hw.wiphy->bands[band]->n_channels;
+			for (i = 0; i < max_n; i++) {
+				struct ieee80211_channel *tmp_ch =
+				    &local->hw.wiphy->bands[band]->channels[i];
+
+				if (tmp_ch->flags & (IEEE80211_CHAN_NO_IBSS |
+						     IEEE80211_CHAN_DISABLED))
+					continue;
+
+				local->int_scan_req->channels[n_ch] = tmp_ch;
+				n_ch++;
+			}
+		}
+
+		if (WARN_ON_ONCE(n_ch == 0))
+			goto unlock;
+
+		local->int_scan_req->n_channels = n_ch;
+	} else {
+		if (WARN_ON_ONCE(chan->flags & (IEEE80211_CHAN_NO_IBSS |
+						IEEE80211_CHAN_DISABLED)))
+			goto unlock;
+
+		local->int_scan_req->channels[0] = chan;
+		local->int_scan_req->n_channels = 1;
+	}
+
+	local->int_scan_req->ssids = &local->scan_ssid;
+	local->int_scan_req->n_ssids = 1;
+	memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN);
+	local->int_scan_req->ssids[0].ssid_len = ssid_len;
+
+	ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req);
+ unlock:
+	mutex_unlock(&local->mtx);
+	return ret;
+}
+
+/*
+ * Only call this function when a scan can't be queued -- under RTNL.
+ */
+void ieee80211_scan_cancel(struct ieee80211_local *local)
+{
+	/*
+	 * We are canceling software scan, or deferred scan that was not
+	 * yet really started (see __ieee80211_start_scan ).
+	 *
+	 * Regarding hardware scan:
+	 * - we can not call  __ieee80211_scan_completed() as when
+	 *   SCAN_HW_SCANNING bit is set this function change
+	 *   local->hw_scan_req to operate on 5G band, what race with
+	 *   driver which can use local->hw_scan_req
+	 *
+	 * - we can not cancel scan_work since driver can schedule it
+	 *   by ieee80211_scan_completed(..., true) to finish scan
+	 *
+	 * Hence we only call the cancel_hw_scan() callback, but the low-level
+	 * driver is still responsible for calling ieee80211_scan_completed()
+	 * after the scan was completed/aborted.
+	 */
+
+	mutex_lock(&local->mtx);
+	if (!local->scan_req)
+		goto out;
+
+	/*
+	 * We have a scan running and the driver already reported completion,
+	 * but the worker hasn't run yet or is stuck on the mutex - mark it as
+	 * cancelled.
+	 */
+	if (test_bit(SCAN_HW_SCANNING, &local->scanning) &&
+	    test_bit(SCAN_COMPLETED, &local->scanning)) {
+		set_bit(SCAN_HW_CANCELLED, &local->scanning);
+		goto out;
+	}
+
+	if (test_bit(SCAN_HW_SCANNING, &local->scanning)) {
+		/*
+		 * Make sure that __ieee80211_scan_completed doesn't trigger a
+		 * scan on another band.
+		 */
+		set_bit(SCAN_HW_CANCELLED, &local->scanning);
+		if (local->ops->cancel_hw_scan)
+			drv_cancel_hw_scan(local,
+				rcu_dereference_protected(local->scan_sdata,
+						lockdep_is_held(&local->mtx)));
+		goto out;
+	}
+
+	/*
+	 * If the work is currently running, it must be blocked on
+	 * the mutex, but we'll set scan_sdata = NULL and it'll
+	 * simply exit once it acquires the mutex.
+	 */
+	cancel_delayed_work(&local->scan_work);
+	/* and clean up */
+	__ieee80211_scan_completed(&local->hw, true, false);
+out:
+	mutex_unlock(&local->mtx);
+}
+
+int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
+				       struct cfg80211_sched_scan_request *req)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_sched_scan_ies sched_scan_ies = {};
+	int ret, i, iebufsz;
+
+	iebufsz = 2 + IEEE80211_MAX_SSID_LEN +
+		  local->scan_ies_len + req->ie_len;
+
+	mutex_lock(&local->mtx);
+
+	if (rcu_access_pointer(local->sched_scan_sdata)) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	if (!local->ops->sched_scan_start) {
+		ret = -ENOTSUPP;
+		goto out;
+	}
+
+	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+		if (!local->hw.wiphy->bands[i])
+			continue;
+
+		sched_scan_ies.ie[i] = kzalloc(iebufsz, GFP_KERNEL);
+		if (!sched_scan_ies.ie[i]) {
+			ret = -ENOMEM;
+			goto out_free;
+		}
+
+		sched_scan_ies.len[i] =
+			ieee80211_build_preq_ies(local, sched_scan_ies.ie[i],
+						 iebufsz, req->ie, req->ie_len,
+						 i, (u32) -1, 0);
+	}
+
+	ret = drv_sched_scan_start(local, sdata, req, &sched_scan_ies);
+	if (ret == 0)
+		rcu_assign_pointer(local->sched_scan_sdata, sdata);
+
+out_free:
+	while (i > 0)
+		kfree(sched_scan_ies.ie[--i]);
+out:
+	mutex_unlock(&local->mtx);
+	return ret;
+}
+
+int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	int ret = 0;
+
+	mutex_lock(&local->mtx);
+
+	if (!local->ops->sched_scan_stop) {
+		ret = -ENOTSUPP;
+		goto out;
+	}
+
+	if (rcu_access_pointer(local->sched_scan_sdata))
+		drv_sched_scan_stop(local, sdata);
+
+out:
+	mutex_unlock(&local->mtx);
+
+	return ret;
+}
+
+void ieee80211_sched_scan_results(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_sched_scan_results(local);
+
+	cfg80211_sched_scan_results(hw->wiphy);
+}
+EXPORT_SYMBOL(ieee80211_sched_scan_results);
+
+void ieee80211_sched_scan_stopped_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local,
+			     sched_scan_stopped_work);
+
+	mutex_lock(&local->mtx);
+
+	if (!rcu_access_pointer(local->sched_scan_sdata)) {
+		mutex_unlock(&local->mtx);
+		return;
+	}
+
+	rcu_assign_pointer(local->sched_scan_sdata, NULL);
+
+	mutex_unlock(&local->mtx);
+
+	cfg80211_sched_scan_stopped(local->hw.wiphy);
+}
+
+void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_sched_scan_stopped(local);
+
+	ieee80211_queue_work(&local->hw, &local->sched_scan_stopped_work);
+}
+EXPORT_SYMBOL(ieee80211_sched_scan_stopped);
diff --git a/net/mac80211/spectmgmt.c b/net/mac80211/spectmgmt.c
new file mode 100644
index 0000000..578eea3
--- /dev/null
+++ b/net/mac80211/spectmgmt.c
@@ -0,0 +1,82 @@
+/*
+ * spectrum management
+ *
+ * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2007-2008, Intel Corporation
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ieee80211.h>
+#include <net/cfg80211.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "sta_info.h"
+#include "wme.h"
+
+static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
+					struct ieee80211_msrment_ie *request_ie,
+					const u8 *da, const u8 *bssid,
+					u8 dialog_token)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *msr_report;
+
+	skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
+				sizeof(struct ieee80211_msrment_ie));
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+	msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
+	memset(msr_report, 0, 24);
+	memcpy(msr_report->da, da, ETH_ALEN);
+	memcpy(msr_report->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(msr_report->bssid, bssid, ETH_ALEN);
+	msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+						IEEE80211_STYPE_ACTION);
+
+	skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
+	msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
+	msr_report->u.action.u.measurement.action_code =
+				WLAN_ACTION_SPCT_MSR_RPRT;
+	msr_report->u.action.u.measurement.dialog_token = dialog_token;
+
+	msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
+	msr_report->u.action.u.measurement.length =
+			sizeof(struct ieee80211_msrment_ie);
+
+	memset(&msr_report->u.action.u.measurement.msr_elem, 0,
+		sizeof(struct ieee80211_msrment_ie));
+	msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
+	msr_report->u.action.u.measurement.msr_elem.mode |=
+			IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
+	msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
+
+	ieee80211_tx_skb(sdata, skb);
+}
+
+void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_mgmt *mgmt,
+				       size_t len)
+{
+	/*
+	 * Ignoring measurement request is spec violation.
+	 * Mandatory measurements must be reported optional
+	 * measurements might be refused or reported incapable
+	 * For now just refuse
+	 * TODO: Answer basic measurement as unmeasured
+	 */
+	ieee80211_send_refuse_measurement_request(sdata,
+			&mgmt->u.action.u.measurement.msr_elem,
+			mgmt->sa, mgmt->bssid,
+			mgmt->u.action.u.measurement.dialog_token);
+}
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
new file mode 100644
index 0000000..0d1836e
--- /dev/null
+++ b/net/mac80211/sta_info.c
@@ -0,0 +1,1516 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/timer.h>
+#include <linux/rtnetlink.h>
+
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "sta_info.h"
+#include "debugfs_sta.h"
+#include "mesh.h"
+#include "wme.h"
+
+/**
+ * DOC: STA information lifetime rules
+ *
+ * STA info structures (&struct sta_info) are managed in a hash table
+ * for faster lookup and a list for iteration. They are managed using
+ * RCU, i.e. access to the list and hash table is protected by RCU.
+ *
+ * Upon allocating a STA info structure with sta_info_alloc(), the caller
+ * owns that structure. It must then insert it into the hash table using
+ * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
+ * case (which acquires an rcu read section but must not be called from
+ * within one) will the pointer still be valid after the call. Note that
+ * the caller may not do much with the STA info before inserting it, in
+ * particular, it may not start any mesh peer link management or add
+ * encryption keys.
+ *
+ * When the insertion fails (sta_info_insert()) returns non-zero), the
+ * structure will have been freed by sta_info_insert()!
+ *
+ * Station entries are added by mac80211 when you establish a link with a
+ * peer. This means different things for the different type of interfaces
+ * we support. For a regular station this mean we add the AP sta when we
+ * receive an association response from the AP. For IBSS this occurs when
+ * get to know about a peer on the same IBSS. For WDS we add the sta for
+ * the peer immediately upon device open. When using AP mode we add stations
+ * for each respective station upon request from userspace through nl80211.
+ *
+ * In order to remove a STA info structure, various sta_info_destroy_*()
+ * calls are available.
+ *
+ * There is no concept of ownership on a STA entry, each structure is
+ * owned by the global hash table/list until it is removed. All users of
+ * the structure need to be RCU protected so that the structure won't be
+ * freed before they are done using it.
+ */
+
+/* Caller must hold local->sta_mtx */
+static int sta_info_hash_del(struct ieee80211_local *local,
+			     struct sta_info *sta)
+{
+	struct sta_info *s;
+
+	s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)],
+				      lockdep_is_held(&local->sta_mtx));
+	if (!s)
+		return -ENOENT;
+	if (s == sta) {
+		rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)],
+				   s->hnext);
+		return 0;
+	}
+
+	while (rcu_access_pointer(s->hnext) &&
+	       rcu_access_pointer(s->hnext) != sta)
+		s = rcu_dereference_protected(s->hnext,
+					lockdep_is_held(&local->sta_mtx));
+	if (rcu_access_pointer(s->hnext)) {
+		rcu_assign_pointer(s->hnext, sta->hnext);
+		return 0;
+	}
+
+	return -ENOENT;
+}
+
+static void cleanup_single_sta(struct sta_info *sta)
+{
+	int ac, i;
+	struct tid_ampdu_tx *tid_tx;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct ps_data *ps;
+
+	/*
+	 * At this point, when being called as call_rcu callback,
+	 * neither mac80211 nor the driver can reference this
+	 * sta struct any more except by still existing timers
+	 * associated with this station that we clean up below.
+	 *
+	 * Note though that this still uses the sdata and even
+	 * calls the driver in AP and mesh mode, so interfaces
+	 * of those types mush use call sta_info_flush_cleanup()
+	 * (typically via sta_info_flush()) before deconfiguring
+	 * the driver.
+	 *
+	 * In station mode, nothing happens here so it doesn't
+	 * have to (and doesn't) do that, this is intentional to
+	 * speed up roaming.
+	 */
+
+	if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
+		if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+		    sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+			ps = &sdata->bss->ps;
+		else if (ieee80211_vif_is_mesh(&sdata->vif))
+			ps = &sdata->u.mesh.ps;
+		else
+			return;
+
+		clear_sta_flag(sta, WLAN_STA_PS_STA);
+
+		atomic_dec(&ps->num_sta_ps);
+		sta_info_recalc_tim(sta);
+	}
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
+		ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
+		ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
+	}
+
+	if (ieee80211_vif_is_mesh(&sdata->vif))
+		mesh_sta_cleanup(sta);
+
+	cancel_work_sync(&sta->drv_unblock_wk);
+
+	/*
+	 * Destroy aggregation state here. It would be nice to wait for the
+	 * driver to finish aggregation stop and then clean up, but for now
+	 * drivers have to handle aggregation stop being requested, followed
+	 * directly by station destruction.
+	 */
+	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
+		tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
+		if (!tid_tx)
+			continue;
+		ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
+		kfree(tid_tx);
+	}
+
+	sta_info_free(local, sta);
+}
+
+void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata)
+{
+	struct sta_info *sta;
+
+	spin_lock_bh(&sdata->cleanup_stations_lock);
+	while (!list_empty(&sdata->cleanup_stations)) {
+		sta = list_first_entry(&sdata->cleanup_stations,
+				       struct sta_info, list);
+		list_del(&sta->list);
+		spin_unlock_bh(&sdata->cleanup_stations_lock);
+
+		cleanup_single_sta(sta);
+
+		spin_lock_bh(&sdata->cleanup_stations_lock);
+	}
+
+	spin_unlock_bh(&sdata->cleanup_stations_lock);
+}
+
+static void free_sta_rcu(struct rcu_head *h)
+{
+	struct sta_info *sta = container_of(h, struct sta_info, rcu_head);
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+
+	spin_lock(&sdata->cleanup_stations_lock);
+	list_add_tail(&sta->list, &sdata->cleanup_stations);
+	spin_unlock(&sdata->cleanup_stations_lock);
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->cleanup_stations_wk);
+}
+
+/* protected by RCU */
+struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
+			      const u8 *addr)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+
+	sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
+				    lockdep_is_held(&local->sta_mtx));
+	while (sta) {
+		if (sta->sdata == sdata &&
+		    ether_addr_equal(sta->sta.addr, addr))
+			break;
+		sta = rcu_dereference_check(sta->hnext,
+					    lockdep_is_held(&local->sta_mtx));
+	}
+	return sta;
+}
+
+/*
+ * Get sta info either from the specified interface
+ * or from one of its vlans
+ */
+struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
+				  const u8 *addr)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+
+	sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
+				    lockdep_is_held(&local->sta_mtx));
+	while (sta) {
+		if ((sta->sdata == sdata ||
+		     (sta->sdata->bss && sta->sdata->bss == sdata->bss)) &&
+		    ether_addr_equal(sta->sta.addr, addr))
+			break;
+		sta = rcu_dereference_check(sta->hnext,
+					    lockdep_is_held(&local->sta_mtx));
+	}
+	return sta;
+}
+
+struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
+				     int idx)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	int i = 0;
+
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		if (sdata != sta->sdata)
+			continue;
+		if (i < idx) {
+			++i;
+			continue;
+		}
+		return sta;
+	}
+
+	return NULL;
+}
+
+/**
+ * sta_info_free - free STA
+ *
+ * @local: pointer to the global information
+ * @sta: STA info to free
+ *
+ * This function must undo everything done by sta_info_alloc()
+ * that may happen before sta_info_insert(). It may only be
+ * called when sta_info_insert() has not been attempted (and
+ * if that fails, the station is freed anyway.)
+ */
+void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
+{
+	if (sta->rate_ctrl)
+		rate_control_free_sta(sta);
+
+	sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
+
+	kfree(sta);
+}
+
+/* Caller must hold local->sta_mtx */
+static void sta_info_hash_add(struct ieee80211_local *local,
+			      struct sta_info *sta)
+{
+	lockdep_assert_held(&local->sta_mtx);
+	sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)];
+	rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
+}
+
+static void sta_unblock(struct work_struct *wk)
+{
+	struct sta_info *sta;
+
+	sta = container_of(wk, struct sta_info, drv_unblock_wk);
+
+	if (sta->dead)
+		return;
+
+	if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
+		local_bh_disable();
+		ieee80211_sta_ps_deliver_wakeup(sta);
+		local_bh_enable();
+	} else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) {
+		clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+
+		local_bh_disable();
+		ieee80211_sta_ps_deliver_poll_response(sta);
+		local_bh_enable();
+	} else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) {
+		clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+
+		local_bh_disable();
+		ieee80211_sta_ps_deliver_uapsd(sta);
+		local_bh_enable();
+	} else
+		clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+}
+
+static int sta_prepare_rate_control(struct ieee80211_local *local,
+				    struct sta_info *sta, gfp_t gfp)
+{
+	if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
+		return 0;
+
+	sta->rate_ctrl = local->rate_ctrl;
+	sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
+						     &sta->sta, gfp);
+	if (!sta->rate_ctrl_priv)
+		return -ENOMEM;
+
+	return 0;
+}
+
+struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
+				const u8 *addr, gfp_t gfp)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+	struct timespec uptime;
+	int i;
+
+	sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp);
+	if (!sta)
+		return NULL;
+
+	spin_lock_init(&sta->lock);
+	INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
+	INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
+	mutex_init(&sta->ampdu_mlme.mtx);
+#ifdef CPTCFG_MAC80211_MESH
+	if (ieee80211_vif_is_mesh(&sdata->vif) &&
+	    !sdata->u.mesh.user_mpm)
+		init_timer(&sta->plink_timer);
+#endif
+
+	memcpy(sta->sta.addr, addr, ETH_ALEN);
+	sta->local = local;
+	sta->sdata = sdata;
+	sta->last_rx = jiffies;
+
+	sta->sta_state = IEEE80211_STA_NONE;
+
+	do_posix_clock_monotonic_gettime(&uptime);
+	sta->last_connected = uptime.tv_sec;
+	ewma_init(&sta->avg_signal, 1024, 8);
+
+	if (sta_prepare_rate_control(local, sta, gfp)) {
+		kfree(sta);
+		return NULL;
+	}
+
+	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
+		/*
+		 * timer_to_tid must be initialized with identity mapping
+		 * to enable session_timer's data differentiation. See
+		 * sta_rx_agg_session_timer_expired for usage.
+		 */
+		sta->timer_to_tid[i] = i;
+	}
+	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+		skb_queue_head_init(&sta->ps_tx_buf[i]);
+		skb_queue_head_init(&sta->tx_filtered[i]);
+	}
+
+	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
+		sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
+
+	sta->sta.smps_mode = IEEE80211_SMPS_OFF;
+
+	sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
+
+	return sta;
+}
+
+static int sta_info_insert_check(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+
+	/*
+	 * Can't be a WARN_ON because it can be triggered through a race:
+	 * something inserts a STA (on one CPU) without holding the RTNL
+	 * and another CPU turns off the net device.
+	 */
+	if (unlikely(!ieee80211_sdata_running(sdata)))
+		return -ENETDOWN;
+
+	if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
+		    is_multicast_ether_addr(sta->sta.addr)))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int sta_info_insert_drv_state(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata,
+				     struct sta_info *sta)
+{
+	enum ieee80211_sta_state state;
+	int err = 0;
+
+	for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
+		err = drv_sta_state(local, sdata, sta, state, state + 1);
+		if (err)
+			break;
+	}
+
+	if (!err) {
+		/*
+		 * Drivers using legacy sta_add/sta_remove callbacks only
+		 * get uploaded set to true after sta_add is called.
+		 */
+		if (!local->ops->sta_add)
+			sta->uploaded = true;
+		return 0;
+	}
+
+	if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+		sdata_info(sdata,
+			   "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
+			   sta->sta.addr, state + 1, err);
+		err = 0;
+	}
+
+	/* unwind on error */
+	for (; state > IEEE80211_STA_NOTEXIST; state--)
+		WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
+
+	return err;
+}
+
+/*
+ * should be called with sta_mtx locked
+ * this function replaces the mutex lock
+ * with a RCU lock
+ */
+static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
+{
+	struct ieee80211_local *local = sta->local;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct station_info sinfo;
+	int err = 0;
+
+	lockdep_assert_held(&local->sta_mtx);
+
+	/* check if STA exists already */
+	if (sta_info_get_bss(sdata, sta->sta.addr)) {
+		err = -EEXIST;
+		goto out_err;
+	}
+
+	/* notify driver */
+	err = sta_info_insert_drv_state(local, sdata, sta);
+	if (err)
+		goto out_err;
+
+	local->num_sta++;
+	local->sta_generation++;
+	smp_mb();
+
+	/* make the station visible */
+	sta_info_hash_add(local, sta);
+
+	list_add_rcu(&sta->list, &local->sta_list);
+
+	set_sta_flag(sta, WLAN_STA_INSERTED);
+
+	ieee80211_sta_debugfs_add(sta);
+	rate_control_add_sta_debugfs(sta);
+
+	memset(&sinfo, 0, sizeof(sinfo));
+	sinfo.filled = 0;
+	sinfo.generation = local->sta_generation;
+	cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);
+
+	sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
+
+	/* move reference to rcu-protected */
+	rcu_read_lock();
+	mutex_unlock(&local->sta_mtx);
+
+	if (ieee80211_vif_is_mesh(&sdata->vif))
+		mesh_accept_plinks_update(sdata);
+
+	return 0;
+ out_err:
+	mutex_unlock(&local->sta_mtx);
+	rcu_read_lock();
+	return err;
+}
+
+int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
+{
+	struct ieee80211_local *local = sta->local;
+	int err = 0;
+
+	might_sleep();
+
+	err = sta_info_insert_check(sta);
+	if (err) {
+		rcu_read_lock();
+		goto out_free;
+	}
+
+	mutex_lock(&local->sta_mtx);
+
+	err = sta_info_insert_finish(sta);
+	if (err)
+		goto out_free;
+
+	return 0;
+ out_free:
+	BUG_ON(!err);
+	sta_info_free(local, sta);
+	return err;
+}
+
+int sta_info_insert(struct sta_info *sta)
+{
+	int err = sta_info_insert_rcu(sta);
+
+	rcu_read_unlock();
+
+	return err;
+}
+
+static inline void __bss_tim_set(u8 *tim, u16 id)
+{
+	/*
+	 * This format has been mandated by the IEEE specifications,
+	 * so this line may not be changed to use the __set_bit() format.
+	 */
+	tim[id / 8] |= (1 << (id % 8));
+}
+
+static inline void __bss_tim_clear(u8 *tim, u16 id)
+{
+	/*
+	 * This format has been mandated by the IEEE specifications,
+	 * so this line may not be changed to use the __clear_bit() format.
+	 */
+	tim[id / 8] &= ~(1 << (id % 8));
+}
+
+static inline bool __bss_tim_get(u8 *tim, u16 id)
+{
+	/*
+	 * This format has been mandated by the IEEE specifications,
+	 * so this line may not be changed to use the test_bit() format.
+	 */
+	return tim[id / 8] & (1 << (id % 8));
+}
+
+static unsigned long ieee80211_tids_for_ac(int ac)
+{
+	/* If we ever support TIDs > 7, this obviously needs to be adjusted */
+	switch (ac) {
+	case IEEE80211_AC_VO:
+		return BIT(6) | BIT(7);
+	case IEEE80211_AC_VI:
+		return BIT(4) | BIT(5);
+	case IEEE80211_AC_BE:
+		return BIT(0) | BIT(3);
+	case IEEE80211_AC_BK:
+		return BIT(1) | BIT(2);
+	default:
+		WARN_ON(1);
+		return 0;
+	}
+}
+
+void sta_info_recalc_tim(struct sta_info *sta)
+{
+	struct ieee80211_local *local = sta->local;
+	struct ps_data *ps;
+	bool indicate_tim = false;
+	u8 ignore_for_tim = sta->sta.uapsd_queues;
+	int ac;
+	u16 id;
+
+	if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+	    sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		if (WARN_ON_ONCE(!sta->sdata->bss))
+			return;
+
+		ps = &sta->sdata->bss->ps;
+		id = sta->sta.aid;
+#ifdef CPTCFG_MAC80211_MESH
+	} else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
+		ps = &sta->sdata->u.mesh.ps;
+		/* TIM map only for PLID <= IEEE80211_MAX_AID */
+		id = le16_to_cpu(sta->plid) % IEEE80211_MAX_AID;
+#endif
+	} else {
+		return;
+	}
+
+	/* No need to do anything if the driver does all */
+	if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
+		return;
+
+	if (sta->dead)
+		goto done;
+
+	/*
+	 * If all ACs are delivery-enabled then we should build
+	 * the TIM bit for all ACs anyway; if only some are then
+	 * we ignore those and build the TIM bit using only the
+	 * non-enabled ones.
+	 */
+	if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
+		ignore_for_tim = 0;
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		unsigned long tids;
+
+		if (ignore_for_tim & BIT(ac))
+			continue;
+
+		indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
+				!skb_queue_empty(&sta->ps_tx_buf[ac]);
+		if (indicate_tim)
+			break;
+
+		tids = ieee80211_tids_for_ac(ac);
+
+		indicate_tim |=
+			sta->driver_buffered_tids & tids;
+	}
+
+ done:
+	spin_lock_bh(&local->tim_lock);
+
+	if (indicate_tim == __bss_tim_get(ps->tim, id))
+		goto out_unlock;
+
+	if (indicate_tim)
+		__bss_tim_set(ps->tim, id);
+	else
+		__bss_tim_clear(ps->tim, id);
+
+	if (local->ops->set_tim) {
+		local->tim_in_locked_section = true;
+		drv_set_tim(local, &sta->sta, indicate_tim);
+		local->tim_in_locked_section = false;
+	}
+
+out_unlock:
+	spin_unlock_bh(&local->tim_lock);
+}
+
+static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info;
+	int timeout;
+
+	if (!skb)
+		return false;
+
+	info = IEEE80211_SKB_CB(skb);
+
+	/* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
+	timeout = (sta->listen_interval *
+		   sta->sdata->vif.bss_conf.beacon_int *
+		   32 / 15625) * HZ;
+	if (timeout < STA_TX_BUFFER_EXPIRE)
+		timeout = STA_TX_BUFFER_EXPIRE;
+	return time_after(jiffies, info->control.jiffies + timeout);
+}
+
+
+static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
+						struct sta_info *sta, int ac)
+{
+	unsigned long flags;
+	struct sk_buff *skb;
+
+	/*
+	 * First check for frames that should expire on the filtered
+	 * queue. Frames here were rejected by the driver and are on
+	 * a separate queue to avoid reordering with normal PS-buffered
+	 * frames. They also aren't accounted for right now in the
+	 * total_ps_buffered counter.
+	 */
+	for (;;) {
+		spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
+		skb = skb_peek(&sta->tx_filtered[ac]);
+		if (sta_info_buffer_expired(sta, skb))
+			skb = __skb_dequeue(&sta->tx_filtered[ac]);
+		else
+			skb = NULL;
+		spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
+
+		/*
+		 * Frames are queued in order, so if this one
+		 * hasn't expired yet we can stop testing. If
+		 * we actually reached the end of the queue we
+		 * also need to stop, of course.
+		 */
+		if (!skb)
+			break;
+		ieee80211_free_txskb(&local->hw, skb);
+	}
+
+	/*
+	 * Now also check the normal PS-buffered queue, this will
+	 * only find something if the filtered queue was emptied
+	 * since the filtered frames are all before the normal PS
+	 * buffered frames.
+	 */
+	for (;;) {
+		spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
+		skb = skb_peek(&sta->ps_tx_buf[ac]);
+		if (sta_info_buffer_expired(sta, skb))
+			skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
+		else
+			skb = NULL;
+		spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
+
+		/*
+		 * frames are queued in order, so if this one
+		 * hasn't expired yet (or we reached the end of
+		 * the queue) we can stop testing
+		 */
+		if (!skb)
+			break;
+
+		local->total_ps_buffered--;
+		ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
+		       sta->sta.addr);
+		ieee80211_free_txskb(&local->hw, skb);
+	}
+
+	/*
+	 * Finally, recalculate the TIM bit for this station -- it might
+	 * now be clear because the station was too slow to retrieve its
+	 * frames.
+	 */
+	sta_info_recalc_tim(sta);
+
+	/*
+	 * Return whether there are any frames still buffered, this is
+	 * used to check whether the cleanup timer still needs to run,
+	 * if there are no frames we don't need to rearm the timer.
+	 */
+	return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
+		 skb_queue_empty(&sta->tx_filtered[ac]));
+}
+
+static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
+					     struct sta_info *sta)
+{
+	bool have_buffered = false;
+	int ac;
+
+	/* This is only necessary for stations on BSS/MBSS interfaces */
+	if (!sta->sdata->bss &&
+	    !ieee80211_vif_is_mesh(&sta->sdata->vif))
+		return false;
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+		have_buffered |=
+			sta_info_cleanup_expire_buffered_ac(local, sta, ac);
+
+	return have_buffered;
+}
+
+int __must_check __sta_info_destroy(struct sta_info *sta)
+{
+	struct ieee80211_local *local;
+	struct ieee80211_sub_if_data *sdata;
+	int ret;
+
+	might_sleep();
+
+	if (!sta)
+		return -ENOENT;
+
+	local = sta->local;
+	sdata = sta->sdata;
+
+	lockdep_assert_held(&local->sta_mtx);
+
+	/*
+	 * Before removing the station from the driver and
+	 * rate control, it might still start new aggregation
+	 * sessions -- block that to make sure the tear-down
+	 * will be sufficient.
+	 */
+	set_sta_flag(sta, WLAN_STA_BLOCK_BA);
+	ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
+
+	ret = sta_info_hash_del(local, sta);
+	if (ret)
+		return ret;
+
+	list_del_rcu(&sta->list);
+
+	/* this always calls synchronize_net() */
+	ieee80211_free_sta_keys(local, sta);
+
+	sta->dead = true;
+
+	local->num_sta--;
+	local->sta_generation++;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+		RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
+
+	while (sta->sta_state > IEEE80211_STA_NONE) {
+		ret = sta_info_move_state(sta, sta->sta_state - 1);
+		if (ret) {
+			WARN_ON_ONCE(1);
+			break;
+		}
+	}
+
+	if (sta->uploaded) {
+		ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
+				    IEEE80211_STA_NOTEXIST);
+		WARN_ON_ONCE(ret != 0);
+	}
+
+	sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
+
+	cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL);
+
+	rate_control_remove_sta_debugfs(sta);
+	ieee80211_sta_debugfs_remove(sta);
+
+	call_rcu(&sta->rcu_head, free_sta_rcu);
+
+	return 0;
+}
+
+int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
+{
+	struct sta_info *sta;
+	int ret;
+
+	mutex_lock(&sdata->local->sta_mtx);
+	sta = sta_info_get(sdata, addr);
+	ret = __sta_info_destroy(sta);
+	mutex_unlock(&sdata->local->sta_mtx);
+
+	return ret;
+}
+
+int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
+			      const u8 *addr)
+{
+	struct sta_info *sta;
+	int ret;
+
+	mutex_lock(&sdata->local->sta_mtx);
+	sta = sta_info_get_bss(sdata, addr);
+	ret = __sta_info_destroy(sta);
+	mutex_unlock(&sdata->local->sta_mtx);
+
+	return ret;
+}
+
+static void sta_info_cleanup(unsigned long data)
+{
+	struct ieee80211_local *local = (struct ieee80211_local *) data;
+	struct sta_info *sta;
+	bool timer_needed = false;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sta, &local->sta_list, list)
+		if (sta_info_cleanup_expire_buffered(local, sta))
+			timer_needed = true;
+	rcu_read_unlock();
+
+	if (local->quiescing)
+		return;
+
+	if (!timer_needed)
+		return;
+
+	mod_timer(&local->sta_cleanup,
+		  round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
+}
+
+void sta_info_init(struct ieee80211_local *local)
+{
+	spin_lock_init(&local->tim_lock);
+	mutex_init(&local->sta_mtx);
+	INIT_LIST_HEAD(&local->sta_list);
+
+	setup_timer(&local->sta_cleanup, sta_info_cleanup,
+		    (unsigned long)local);
+}
+
+void sta_info_stop(struct ieee80211_local *local)
+{
+	del_timer_sync(&local->sta_cleanup);
+}
+
+
+int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta, *tmp;
+	int ret = 0;
+
+	might_sleep();
+
+	mutex_lock(&local->sta_mtx);
+	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+		if (sdata == sta->sdata) {
+			WARN_ON(__sta_info_destroy(sta));
+			ret++;
+		}
+	}
+	mutex_unlock(&local->sta_mtx);
+
+	return ret;
+}
+
+void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata)
+{
+	ieee80211_cleanup_sdata_stas(sdata);
+	cancel_work_sync(&sdata->cleanup_stations_wk);
+}
+
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+			  unsigned long exp_time)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta, *tmp;
+
+	mutex_lock(&local->sta_mtx);
+
+	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+		if (sdata != sta->sdata)
+			continue;
+
+		if (time_after(jiffies, sta->last_rx + exp_time)) {
+			sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
+				sta->sta.addr);
+
+			if (ieee80211_vif_is_mesh(&sdata->vif) &&
+			    test_sta_flag(sta, WLAN_STA_PS_STA))
+				atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
+
+			WARN_ON(__sta_info_destroy(sta));
+		}
+	}
+
+	mutex_unlock(&local->sta_mtx);
+}
+
+struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
+					       const u8 *addr,
+					       const u8 *localaddr)
+{
+	struct sta_info *sta, *nxt;
+
+	/*
+	 * Just return a random station if localaddr is NULL
+	 * ... first in list.
+	 */
+	for_each_sta_info(hw_to_local(hw), addr, sta, nxt) {
+		if (localaddr &&
+		    !ether_addr_equal(sta->sdata->vif.addr, localaddr))
+			continue;
+		if (!sta->uploaded)
+			return NULL;
+		return &sta->sta;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
+
+struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
+					 const u8 *addr)
+{
+	struct sta_info *sta;
+
+	if (!vif)
+		return NULL;
+
+	sta = sta_info_get_bss(vif_to_sdata(vif), addr);
+	if (!sta)
+		return NULL;
+
+	if (!sta->uploaded)
+		return NULL;
+
+	return &sta->sta;
+}
+EXPORT_SYMBOL(ieee80211_find_sta);
+
+static void clear_sta_ps_flags(void *_sta)
+{
+	struct sta_info *sta = _sta;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ps_data *ps;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP ||
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+		ps = &sdata->bss->ps;
+	else if (ieee80211_vif_is_mesh(&sdata->vif))
+		ps = &sdata->u.mesh.ps;
+	else
+		return;
+
+	clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+	if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA))
+		atomic_dec(&ps->num_sta_ps);
+}
+
+/* powersave support code */
+void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff_head pending;
+	int filtered = 0, buffered = 0, ac;
+	unsigned long flags;
+
+	clear_sta_flag(sta, WLAN_STA_SP);
+
+	BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
+	sta->driver_buffered_tids = 0;
+
+	if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
+		drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
+
+	skb_queue_head_init(&pending);
+
+	/* Send all buffered frames to the station */
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		int count = skb_queue_len(&pending), tmp;
+
+		spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
+		skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
+		spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
+		tmp = skb_queue_len(&pending);
+		filtered += tmp - count;
+		count = tmp;
+
+		spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
+		skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
+		spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
+		tmp = skb_queue_len(&pending);
+		buffered += tmp - count;
+	}
+
+	ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta);
+
+	local->total_ps_buffered -= buffered;
+
+	sta_info_recalc_tim(sta);
+
+	ps_dbg(sdata,
+	       "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
+	       sta->sta.addr, sta->sta.aid, filtered, buffered);
+}
+
+static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
+					 struct sta_info *sta, int tid,
+					 enum ieee80211_frame_release_type reason)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_qos_hdr *nullfunc;
+	struct sk_buff *skb;
+	int size = sizeof(*nullfunc);
+	__le16 fc;
+	bool qos = test_sta_flag(sta, WLAN_STA_WME);
+	struct ieee80211_tx_info *info;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	if (qos) {
+		fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
+				 IEEE80211_STYPE_QOS_NULLFUNC |
+				 IEEE80211_FCTL_FROMDS);
+	} else {
+		size -= 2;
+		fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
+				 IEEE80211_STYPE_NULLFUNC |
+				 IEEE80211_FCTL_FROMDS);
+	}
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	nullfunc = (void *) skb_put(skb, size);
+	nullfunc->frame_control = fc;
+	nullfunc->duration_id = 0;
+	memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
+	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
+	memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
+
+	skb->priority = tid;
+	skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
+	if (qos) {
+		nullfunc->qos_ctrl = cpu_to_le16(tid);
+
+		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
+			nullfunc->qos_ctrl |=
+				cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
+	}
+
+	info = IEEE80211_SKB_CB(skb);
+
+	/*
+	 * Tell TX path to send this frame even though the
+	 * STA may still remain is PS mode after this frame
+	 * exchange. Also set EOSP to indicate this packet
+	 * ends the poll/service period.
+	 */
+	info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
+		       IEEE80211_TX_STATUS_EOSP |
+		       IEEE80211_TX_CTL_REQ_TX_STATUS;
+
+	drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false);
+
+	skb->dev = sdata->dev;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		kfree_skb(skb);
+		return;
+	}
+
+	ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band);
+	rcu_read_unlock();
+}
+
+static void
+ieee80211_sta_ps_deliver_response(struct sta_info *sta,
+				  int n_frames, u8 ignored_acs,
+				  enum ieee80211_frame_release_type reason)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
+	bool found = false;
+	bool more_data = false;
+	int ac;
+	unsigned long driver_release_tids = 0;
+	struct sk_buff_head frames;
+
+	/* Service or PS-Poll period starts */
+	set_sta_flag(sta, WLAN_STA_SP);
+
+	__skb_queue_head_init(&frames);
+
+	/*
+	 * Get response frame(s) and more data bit for it.
+	 */
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		unsigned long tids;
+
+		if (ignored_acs & BIT(ac))
+			continue;
+
+		tids = ieee80211_tids_for_ac(ac);
+
+		if (!found) {
+			driver_release_tids = sta->driver_buffered_tids & tids;
+			if (driver_release_tids) {
+				found = true;
+			} else {
+				struct sk_buff *skb;
+
+				while (n_frames > 0) {
+					skb = skb_dequeue(&sta->tx_filtered[ac]);
+					if (!skb) {
+						skb = skb_dequeue(
+							&sta->ps_tx_buf[ac]);
+						if (skb)
+							local->total_ps_buffered--;
+					}
+					if (!skb)
+						break;
+					n_frames--;
+					found = true;
+					__skb_queue_tail(&frames, skb);
+				}
+			}
+
+			/*
+			 * If the driver has data on more than one TID then
+			 * certainly there's more data if we release just a
+			 * single frame now (from a single TID).
+			 */
+			if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
+			    hweight16(driver_release_tids) > 1) {
+				more_data = true;
+				driver_release_tids =
+					BIT(ffs(driver_release_tids) - 1);
+				break;
+			}
+		}
+
+		if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
+		    !skb_queue_empty(&sta->ps_tx_buf[ac])) {
+			more_data = true;
+			break;
+		}
+	}
+
+	if (!found) {
+		int tid;
+
+		/*
+		 * For PS-Poll, this can only happen due to a race condition
+		 * when we set the TIM bit and the station notices it, but
+		 * before it can poll for the frame we expire it.
+		 *
+		 * For uAPSD, this is said in the standard (11.2.1.5 h):
+		 *	At each unscheduled SP for a non-AP STA, the AP shall
+		 *	attempt to transmit at least one MSDU or MMPDU, but no
+		 *	more than the value specified in the Max SP Length field
+		 *	in the QoS Capability element from delivery-enabled ACs,
+		 *	that are destined for the non-AP STA.
+		 *
+		 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
+		 */
+
+		/* This will evaluate to 1, 3, 5 or 7. */
+		tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
+
+		ieee80211_send_null_response(sdata, sta, tid, reason);
+		return;
+	}
+
+	if (!driver_release_tids) {
+		struct sk_buff_head pending;
+		struct sk_buff *skb;
+		int num = 0;
+		u16 tids = 0;
+
+		skb_queue_head_init(&pending);
+
+		while ((skb = __skb_dequeue(&frames))) {
+			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+			struct ieee80211_hdr *hdr = (void *) skb->data;
+			u8 *qoshdr = NULL;
+
+			num++;
+
+			/*
+			 * Tell TX path to send this frame even though the
+			 * STA may still remain is PS mode after this frame
+			 * exchange.
+			 */
+			info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
+
+			/*
+			 * Use MoreData flag to indicate whether there are
+			 * more buffered frames for this STA
+			 */
+			if (more_data || !skb_queue_empty(&frames))
+				hdr->frame_control |=
+					cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+			else
+				hdr->frame_control &=
+					cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
+
+			if (ieee80211_is_data_qos(hdr->frame_control) ||
+			    ieee80211_is_qos_nullfunc(hdr->frame_control))
+				qoshdr = ieee80211_get_qos_ctl(hdr);
+
+			/* end service period after last frame */
+			if (skb_queue_empty(&frames)) {
+				if (reason == IEEE80211_FRAME_RELEASE_UAPSD &&
+				    qoshdr)
+					*qoshdr |= IEEE80211_QOS_CTL_EOSP;
+
+				info->flags |= IEEE80211_TX_STATUS_EOSP |
+					       IEEE80211_TX_CTL_REQ_TX_STATUS;
+			}
+
+			if (qoshdr)
+				tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK);
+			else
+				tids |= BIT(0);
+
+			__skb_queue_tail(&pending, skb);
+		}
+
+		drv_allow_buffered_frames(local, sta, tids, num,
+					  reason, more_data);
+
+		ieee80211_add_pending_skbs(local, &pending);
+
+		sta_info_recalc_tim(sta);
+	} else {
+		/*
+		 * We need to release a frame that is buffered somewhere in the
+		 * driver ... it'll have to handle that.
+		 * Note that, as per the comment above, it'll also have to see
+		 * if there is more than just one frame on the specific TID that
+		 * we're releasing from, and it needs to set the more-data bit
+		 * accordingly if we tell it that there's no more data. If we do
+		 * tell it there's more data, then of course the more-data bit
+		 * needs to be set anyway.
+		 */
+		drv_release_buffered_frames(local, sta, driver_release_tids,
+					    n_frames, reason, more_data);
+
+		/*
+		 * Note that we don't recalculate the TIM bit here as it would
+		 * most likely have no effect at all unless the driver told us
+		 * that the TID became empty before returning here from the
+		 * release function.
+		 * Either way, however, when the driver tells us that the TID
+		 * became empty we'll do the TIM recalculation.
+		 */
+	}
+}
+
+void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
+{
+	u8 ignore_for_response = sta->sta.uapsd_queues;
+
+	/*
+	 * If all ACs are delivery-enabled then we should reply
+	 * from any of them, if only some are enabled we reply
+	 * only from the non-enabled ones.
+	 */
+	if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
+		ignore_for_response = 0;
+
+	ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
+					  IEEE80211_FRAME_RELEASE_PSPOLL);
+}
+
+void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
+{
+	int n_frames = sta->sta.max_sp;
+	u8 delivery_enabled = sta->sta.uapsd_queues;
+
+	/*
+	 * If we ever grow support for TSPEC this might happen if
+	 * the TSPEC update from hostapd comes in between a trigger
+	 * frame setting WLAN_STA_UAPSD in the RX path and this
+	 * actually getting called.
+	 */
+	if (!delivery_enabled)
+		return;
+
+	switch (sta->sta.max_sp) {
+	case 1:
+		n_frames = 2;
+		break;
+	case 2:
+		n_frames = 4;
+		break;
+	case 3:
+		n_frames = 6;
+		break;
+	case 0:
+		/* XXX: what is a good value? */
+		n_frames = 8;
+		break;
+	}
+
+	ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
+					  IEEE80211_FRAME_RELEASE_UAPSD);
+}
+
+void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
+			       struct ieee80211_sta *pubsta, bool block)
+{
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+	trace_api_sta_block_awake(sta->local, pubsta, block);
+
+	if (block)
+		set_sta_flag(sta, WLAN_STA_PS_DRIVER);
+	else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER))
+		ieee80211_queue_work(hw, &sta->drv_unblock_wk);
+}
+EXPORT_SYMBOL(ieee80211_sta_block_awake);
+
+void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
+{
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+	struct ieee80211_local *local = sta->local;
+
+	trace_api_eosp(local, pubsta);
+
+	clear_sta_flag(sta, WLAN_STA_SP);
+}
+EXPORT_SYMBOL(ieee80211_sta_eosp);
+
+void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
+				u8 tid, bool buffered)
+{
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+	if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
+		return;
+
+	if (buffered)
+		set_bit(tid, &sta->driver_buffered_tids);
+	else
+		clear_bit(tid, &sta->driver_buffered_tids);
+
+	sta_info_recalc_tim(sta);
+}
+EXPORT_SYMBOL(ieee80211_sta_set_buffered);
+
+int sta_info_move_state(struct sta_info *sta,
+			enum ieee80211_sta_state new_state)
+{
+	might_sleep();
+
+	if (sta->sta_state == new_state)
+		return 0;
+
+	/* check allowed transitions first */
+
+	switch (new_state) {
+	case IEEE80211_STA_NONE:
+		if (sta->sta_state != IEEE80211_STA_AUTH)
+			return -EINVAL;
+		break;
+	case IEEE80211_STA_AUTH:
+		if (sta->sta_state != IEEE80211_STA_NONE &&
+		    sta->sta_state != IEEE80211_STA_ASSOC)
+			return -EINVAL;
+		break;
+	case IEEE80211_STA_ASSOC:
+		if (sta->sta_state != IEEE80211_STA_AUTH &&
+		    sta->sta_state != IEEE80211_STA_AUTHORIZED)
+			return -EINVAL;
+		break;
+	case IEEE80211_STA_AUTHORIZED:
+		if (sta->sta_state != IEEE80211_STA_ASSOC)
+			return -EINVAL;
+		break;
+	default:
+		WARN(1, "invalid state %d", new_state);
+		return -EINVAL;
+	}
+
+	sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
+		sta->sta.addr, new_state);
+
+	/*
+	 * notify the driver before the actual changes so it can
+	 * fail the transition
+	 */
+	if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
+		int err = drv_sta_state(sta->local, sta->sdata, sta,
+					sta->sta_state, new_state);
+		if (err)
+			return err;
+	}
+
+	/* reflect the change in all state variables */
+
+	switch (new_state) {
+	case IEEE80211_STA_NONE:
+		if (sta->sta_state == IEEE80211_STA_AUTH)
+			clear_bit(WLAN_STA_AUTH, &sta->_flags);
+		break;
+	case IEEE80211_STA_AUTH:
+		if (sta->sta_state == IEEE80211_STA_NONE)
+			set_bit(WLAN_STA_AUTH, &sta->_flags);
+		else if (sta->sta_state == IEEE80211_STA_ASSOC)
+			clear_bit(WLAN_STA_ASSOC, &sta->_flags);
+		break;
+	case IEEE80211_STA_ASSOC:
+		if (sta->sta_state == IEEE80211_STA_AUTH) {
+			set_bit(WLAN_STA_ASSOC, &sta->_flags);
+		} else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
+			if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+			    (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+			     !sta->sdata->u.vlan.sta))
+				atomic_dec(&sta->sdata->bss->num_mcast_sta);
+			clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
+		}
+		break;
+	case IEEE80211_STA_AUTHORIZED:
+		if (sta->sta_state == IEEE80211_STA_ASSOC) {
+			if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+			    (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+			     !sta->sdata->u.vlan.sta))
+				atomic_inc(&sta->sdata->bss->num_mcast_sta);
+			set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
+		}
+		break;
+	default:
+		break;
+	}
+
+	sta->sta_state = new_state;
+
+	return 0;
+}
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
new file mode 100644
index 0000000..68b3ed1
--- /dev/null
+++ b/net/mac80211/sta_info.h
@@ -0,0 +1,614 @@
+/*
+ * Copyright 2002-2005, Devicescape Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef STA_INFO_H
+#define STA_INFO_H
+
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/if_ether.h>
+#include <linux/workqueue.h>
+#include <linux/average.h>
+#include <linux/etherdevice.h>
+#include "key.h"
+
+/**
+ * enum ieee80211_sta_info_flags - Stations flags
+ *
+ * These flags are used with &struct sta_info's @flags member, but
+ * only indirectly with set_sta_flag() and friends.
+ *
+ * @WLAN_STA_AUTH: Station is authenticated.
+ * @WLAN_STA_ASSOC: Station is associated.
+ * @WLAN_STA_PS_STA: Station is in power-save mode
+ * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
+ *	This bit is always checked so needs to be enabled for all stations
+ *	when virtual port control is not in use.
+ * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
+ *	frames.
+ * @WLAN_STA_WME: Station is a QoS-STA.
+ * @WLAN_STA_WDS: Station is one of our WDS peers.
+ * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
+ *	IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
+ *	frame to this station is transmitted.
+ * @WLAN_STA_MFP: Management frame protection is used with this STA.
+ * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
+ *	during suspend/resume and station removal.
+ * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
+ *	power-save mode logically to flush frames that might still
+ *	be in the queues
+ * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
+ *	station in power-save mode, reply when the driver unblocks.
+ * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
+ * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
+ *	packets. This means the link is enabled.
+ * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
+ *	keeping station in power-save mode, reply when the driver
+ *	unblocks the station.
+ * @WLAN_STA_SP: Station is in a service period, so don't try to
+ *	reply to other uAPSD trigger frames or PS-Poll.
+ * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
+ * @WLAN_STA_INSERTED: This station is inserted into the hash table.
+ * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
+ * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
+ * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
+ * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
+ */
+enum ieee80211_sta_info_flags {
+	WLAN_STA_AUTH,
+	WLAN_STA_ASSOC,
+	WLAN_STA_PS_STA,
+	WLAN_STA_AUTHORIZED,
+	WLAN_STA_SHORT_PREAMBLE,
+	WLAN_STA_WME,
+	WLAN_STA_WDS,
+	WLAN_STA_CLEAR_PS_FILT,
+	WLAN_STA_MFP,
+	WLAN_STA_BLOCK_BA,
+	WLAN_STA_PS_DRIVER,
+	WLAN_STA_PSPOLL,
+	WLAN_STA_TDLS_PEER,
+	WLAN_STA_TDLS_PEER_AUTH,
+	WLAN_STA_UAPSD,
+	WLAN_STA_SP,
+	WLAN_STA_4ADDR_EVENT,
+	WLAN_STA_INSERTED,
+	WLAN_STA_RATE_CONTROL,
+	WLAN_STA_TOFFSET_KNOWN,
+	WLAN_STA_MPSP_OWNER,
+	WLAN_STA_MPSP_RECIPIENT,
+};
+
+#define ADDBA_RESP_INTERVAL HZ
+#define HT_AGG_MAX_RETRIES		15
+#define HT_AGG_BURST_RETRIES		3
+#define HT_AGG_RETRIES_PERIOD		(15 * HZ)
+
+#define HT_AGG_STATE_DRV_READY		0
+#define HT_AGG_STATE_RESPONSE_RECEIVED	1
+#define HT_AGG_STATE_OPERATIONAL	2
+#define HT_AGG_STATE_STOPPING		3
+#define HT_AGG_STATE_WANT_START		4
+#define HT_AGG_STATE_WANT_STOP		5
+
+enum ieee80211_agg_stop_reason {
+	AGG_STOP_DECLINED,
+	AGG_STOP_LOCAL_REQUEST,
+	AGG_STOP_PEER_REQUEST,
+	AGG_STOP_DESTROY_STA,
+};
+
+/**
+ * struct tid_ampdu_tx - TID aggregation information (Tx).
+ *
+ * @rcu_head: rcu head for freeing structure
+ * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
+ * @addba_resp_timer: timer for peer's response to addba request
+ * @pending: pending frames queue -- use sta's spinlock to protect
+ * @dialog_token: dialog token for aggregation session
+ * @timeout: session timeout value to be filled in ADDBA requests
+ * @state: session state (see above)
+ * @last_tx: jiffies of last tx activity
+ * @stop_initiator: initiator of a session stop
+ * @tx_stop: TX DelBA frame when stopping
+ * @buf_size: reorder buffer size at receiver
+ * @failed_bar_ssn: ssn of the last failed BAR tx attempt
+ * @bar_pending: BAR needs to be re-sent
+ *
+ * This structure's lifetime is managed by RCU, assignments to
+ * the array holding it must hold the aggregation mutex.
+ *
+ * The TX path can access it under RCU lock-free if, and
+ * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
+ * set. Otherwise, the TX path must also acquire the spinlock
+ * and re-check the state, see comments in the tx code
+ * touching it.
+ */
+struct tid_ampdu_tx {
+	struct rcu_head rcu_head;
+	struct timer_list session_timer;
+	struct timer_list addba_resp_timer;
+	struct sk_buff_head pending;
+	unsigned long state;
+	unsigned long last_tx;
+	u16 timeout;
+	u8 dialog_token;
+	u8 stop_initiator;
+	bool tx_stop;
+	u8 buf_size;
+
+	u16 failed_bar_ssn;
+	bool bar_pending;
+};
+
+/**
+ * struct tid_ampdu_rx - TID aggregation information (Rx).
+ *
+ * @reorder_buf: buffer to reorder incoming aggregated MPDUs
+ * @reorder_time: jiffies when skb was added
+ * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
+ * @reorder_timer: releases expired frames from the reorder buffer.
+ * @last_rx: jiffies of last rx activity
+ * @head_seq_num: head sequence number in reordering buffer.
+ * @stored_mpdu_num: number of MPDUs in reordering buffer
+ * @ssn: Starting Sequence Number expected to be aggregated.
+ * @buf_size: buffer size for incoming A-MPDUs
+ * @timeout: reset timer value (in TUs).
+ * @dialog_token: dialog token for aggregation session
+ * @rcu_head: RCU head used for freeing this struct
+ * @reorder_lock: serializes access to reorder buffer, see below.
+ *
+ * This structure's lifetime is managed by RCU, assignments to
+ * the array holding it must hold the aggregation mutex.
+ *
+ * The @reorder_lock is used to protect the members of this
+ * struct, except for @timeout, @buf_size and @dialog_token,
+ * which are constant across the lifetime of the struct (the
+ * dialog token being used only for debugging).
+ */
+struct tid_ampdu_rx {
+	struct rcu_head rcu_head;
+	spinlock_t reorder_lock;
+	struct sk_buff **reorder_buf;
+	unsigned long *reorder_time;
+	struct timer_list session_timer;
+	struct timer_list reorder_timer;
+	unsigned long last_rx;
+	u16 head_seq_num;
+	u16 stored_mpdu_num;
+	u16 ssn;
+	u16 buf_size;
+	u16 timeout;
+	u8 dialog_token;
+};
+
+/**
+ * struct sta_ampdu_mlme - STA aggregation information.
+ *
+ * @tid_rx: aggregation info for Rx per TID -- RCU protected
+ * @tid_tx: aggregation info for Tx per TID
+ * @tid_start_tx: sessions where start was requested
+ * @addba_req_num: number of times addBA request has been sent.
+ * @last_addba_req_time: timestamp of the last addBA request.
+ * @dialog_token_allocator: dialog token enumerator for each new session;
+ * @work: work struct for starting/stopping aggregation
+ * @tid_rx_timer_expired: bitmap indicating on which TIDs the
+ *	RX timer expired until the work for it runs
+ * @tid_rx_stop_requested:  bitmap indicating which BA sessions per TID the
+ *	driver requested to close until the work for it runs
+ * @mtx: mutex to protect all TX data (except non-NULL assignments
+ *	to tid_tx[idx], which are protected by the sta spinlock)
+ */
+struct sta_ampdu_mlme {
+	struct mutex mtx;
+	/* rx */
+	struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
+	unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
+	unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
+	/* tx */
+	struct work_struct work;
+	struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
+	struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
+	unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
+	u8 addba_req_num[IEEE80211_NUM_TIDS];
+	u8 dialog_token_allocator;
+};
+
+
+/**
+ * struct sta_info - STA information
+ *
+ * This structure collects information about a station that
+ * mac80211 is communicating with.
+ *
+ * @list: global linked list entry
+ * @hnext: hash table linked list pointer
+ * @local: pointer to the global information
+ * @sdata: virtual interface this station belongs to
+ * @ptk: peer key negotiated with this station, if any
+ * @gtk: group keys negotiated with this station, if any
+ * @rate_ctrl: rate control algorithm reference
+ * @rate_ctrl_priv: rate control private per-STA pointer
+ * @last_tx_rate: rate used for last transmit, to report to userspace as
+ *	"the" transmit rate
+ * @last_rx_rate_idx: rx status rate index of the last data packet
+ * @last_rx_rate_flag: rx status flag of the last data packet
+ * @last_rx_rate_vht_nss: rx status nss of last data packet
+ * @lock: used for locking all fields that require locking, see comments
+ *	in the header file.
+ * @drv_unblock_wk: used for driver PS unblocking
+ * @listen_interval: listen interval of this station, when we're acting as AP
+ * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
+ * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
+ *	when it leaves power saving state or polls
+ * @tx_filtered: buffers (per AC) of frames we already tried to
+ *	transmit but were filtered by hardware due to STA having
+ *	entered power saving state, these are also delivered to
+ *	the station when it leaves powersave or polls for frames
+ * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
+ * @rx_packets: Number of MSDUs received from this STA
+ * @rx_bytes: Number of bytes received from this STA
+ * @wep_weak_iv_count: number of weak WEP IVs received from this station
+ * @last_rx: time (in jiffies) when last frame was received from this STA
+ * @last_connected: time (in seconds) when a station got connected
+ * @num_duplicates: number of duplicate frames received from this STA
+ * @rx_fragments: number of received MPDUs
+ * @rx_dropped: number of dropped MPDUs from this STA
+ * @last_signal: signal of last received frame from this STA
+ * @avg_signal: moving average of signal of received frames from this STA
+ * @last_ack_signal: signal of last received Ack frame from this STA
+ * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
+ * @tx_filtered_count: number of frames the hardware filtered for this STA
+ * @tx_retry_failed: number of frames that failed retry
+ * @tx_retry_count: total number of retries for frames to this STA
+ * @fail_avg: moving percentage of failed MSDUs
+ * @tx_packets: number of RX/TX MSDUs
+ * @tx_bytes: number of bytes transmitted to this STA
+ * @tx_fragments: number of transmitted MPDUs
+ * @tid_seq: per-TID sequence numbers for sending to this STA
+ * @ampdu_mlme: A-MPDU state machine state
+ * @timer_to_tid: identity mapping to ID timers
+ * @llid: Local link ID
+ * @plid: Peer link ID
+ * @reason: Cancel reason on PLINK_HOLDING state
+ * @plink_retries: Retries in establishment
+ * @ignore_plink_timer: ignore the peer-link timer (used internally)
+ * @plink_state: peer link state
+ * @plink_timeout: timeout of peer link
+ * @plink_timer: peer link watch timer
+ * @t_offset: timing offset relative to this host
+ * @t_offset_setpoint: reference timing offset of this sta to be used when
+ * 	calculating clockdrift
+ * @local_pm: local link-specific power save mode
+ * @peer_pm: peer-specific power save mode towards local STA
+ * @nonpeer_pm: STA power save mode towards non-peer neighbors
+ * @debugfs: debug filesystem info
+ * @dead: set to true when sta is unlinked
+ * @uploaded: set to true when sta is uploaded to the driver
+ * @lost_packets: number of consecutive lost packets
+ * @sta: station information we share with the driver
+ * @sta_state: duplicates information about station state (for debug)
+ * @beacon_loss_count: number of times beacon loss has triggered
+ * @rcu_head: RCU head used for freeing this station struct
+ * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
+ *	taken from HT/VHT capabilities or VHT operating mode notification
+ */
+struct sta_info {
+	/* General information, mostly static */
+	struct list_head list;
+	struct rcu_head rcu_head;
+	struct sta_info __rcu *hnext;
+	struct ieee80211_local *local;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
+	struct ieee80211_key __rcu *ptk;
+	struct rate_control_ref *rate_ctrl;
+	void *rate_ctrl_priv;
+	spinlock_t lock;
+
+	struct work_struct drv_unblock_wk;
+
+	u16 listen_interval;
+
+	bool dead;
+
+	bool uploaded;
+
+	enum ieee80211_sta_state sta_state;
+
+	/* use the accessors defined below */
+	unsigned long _flags;
+
+	/*
+	 * STA powersave frame queues, no more than the internal
+	 * locking required.
+	 */
+	struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
+	struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
+	unsigned long driver_buffered_tids;
+
+	/* Updated from RX path only, no locking requirements */
+	unsigned long rx_packets;
+	u64 rx_bytes;
+	unsigned long wep_weak_iv_count;
+	unsigned long last_rx;
+	long last_connected;
+	unsigned long num_duplicates;
+	unsigned long rx_fragments;
+	unsigned long rx_dropped;
+	int last_signal;
+	struct ewma avg_signal;
+	int last_ack_signal;
+	/* Plus 1 for non-QoS frames */
+	__le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
+
+	/* Updated from TX status path only, no locking requirements */
+	unsigned long tx_filtered_count;
+	unsigned long tx_retry_failed, tx_retry_count;
+	/* moving percentage of failed MSDUs */
+	unsigned int fail_avg;
+
+	/* Updated from TX path only, no locking requirements */
+	u32 tx_fragments;
+	u64 tx_packets[IEEE80211_NUM_ACS];
+	u64 tx_bytes[IEEE80211_NUM_ACS];
+	struct ieee80211_tx_rate last_tx_rate;
+	int last_rx_rate_idx;
+	u32 last_rx_rate_flag;
+	u8 last_rx_rate_vht_nss;
+	u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
+
+	/*
+	 * Aggregation information, locked with lock.
+	 */
+	struct sta_ampdu_mlme ampdu_mlme;
+	u8 timer_to_tid[IEEE80211_NUM_TIDS];
+
+#ifdef CPTCFG_MAC80211_MESH
+	/*
+	 * Mesh peer link attributes
+	 * TODO: move to a sub-structure that is referenced with pointer?
+	 */
+	__le16 llid;
+	__le16 plid;
+	__le16 reason;
+	u8 plink_retries;
+	bool ignore_plink_timer;
+	enum nl80211_plink_state plink_state;
+	u32 plink_timeout;
+	struct timer_list plink_timer;
+	s64 t_offset;
+	s64 t_offset_setpoint;
+	/* mesh power save */
+	enum nl80211_mesh_power_mode local_pm;
+	enum nl80211_mesh_power_mode peer_pm;
+	enum nl80211_mesh_power_mode nonpeer_pm;
+#endif
+
+#ifdef CPTCFG_MAC80211_DEBUGFS
+	struct sta_info_debugfsdentries {
+		struct dentry *dir;
+		bool add_has_run;
+	} debugfs;
+#endif
+
+	enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
+
+	unsigned int lost_packets;
+	unsigned int beacon_loss_count;
+
+	/* keep last! */
+	struct ieee80211_sta sta;
+};
+
+static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
+{
+#ifdef CPTCFG_MAC80211_MESH
+	return sta->plink_state;
+#endif
+	return NL80211_PLINK_LISTEN;
+}
+
+static inline void set_sta_flag(struct sta_info *sta,
+				enum ieee80211_sta_info_flags flag)
+{
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
+	set_bit(flag, &sta->_flags);
+}
+
+static inline void clear_sta_flag(struct sta_info *sta,
+				  enum ieee80211_sta_info_flags flag)
+{
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
+	clear_bit(flag, &sta->_flags);
+}
+
+static inline int test_sta_flag(struct sta_info *sta,
+				enum ieee80211_sta_info_flags flag)
+{
+	return test_bit(flag, &sta->_flags);
+}
+
+static inline int test_and_clear_sta_flag(struct sta_info *sta,
+					  enum ieee80211_sta_info_flags flag)
+{
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
+	return test_and_clear_bit(flag, &sta->_flags);
+}
+
+static inline int test_and_set_sta_flag(struct sta_info *sta,
+					enum ieee80211_sta_info_flags flag)
+{
+	WARN_ON(flag == WLAN_STA_AUTH ||
+		flag == WLAN_STA_ASSOC ||
+		flag == WLAN_STA_AUTHORIZED);
+	return test_and_set_bit(flag, &sta->_flags);
+}
+
+int sta_info_move_state(struct sta_info *sta,
+			enum ieee80211_sta_state new_state);
+
+static inline void sta_info_pre_move_state(struct sta_info *sta,
+					   enum ieee80211_sta_state new_state)
+{
+	int ret;
+
+	WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
+
+	ret = sta_info_move_state(sta, new_state);
+	WARN_ON_ONCE(ret);
+}
+
+
+void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
+			     struct tid_ampdu_tx *tid_tx);
+
+static inline struct tid_ampdu_tx *
+rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
+{
+	return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
+					 lockdep_is_held(&sta->lock) ||
+					 lockdep_is_held(&sta->ampdu_mlme.mtx));
+}
+
+#define STA_HASH_SIZE 256
+#define STA_HASH(sta) (sta[5])
+
+
+/* Maximum number of frames to buffer per power saving station per AC */
+#define STA_MAX_TX_BUFFER	64
+
+/* Minimum buffered frame expiry time. If STA uses listen interval that is
+ * smaller than this value, the minimum value here is used instead. */
+#define STA_TX_BUFFER_EXPIRE (10 * HZ)
+
+/* How often station data is cleaned up (e.g., expiration of buffered frames)
+ */
+#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
+
+/*
+ * Get a STA info, must be under RCU read lock.
+ */
+struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
+			      const u8 *addr);
+
+struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
+				  const u8 *addr);
+
+static inline
+void for_each_sta_info_type_check(struct ieee80211_local *local,
+				  const u8 *addr,
+				  struct sta_info *sta,
+				  struct sta_info *nxt)
+{
+}
+
+#define for_each_sta_info(local, _addr, _sta, nxt)			\
+	for (	/* initialise loop */					\
+		_sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
+		nxt = _sta ? rcu_dereference(_sta->hnext) : NULL;	\
+		/* typecheck */						\
+		for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
+		/* continue condition */				\
+		_sta;							\
+		/* advance loop */					\
+		_sta = nxt,						\
+		nxt = _sta ? rcu_dereference(_sta->hnext) : NULL	\
+	     )								\
+	/* compare address and run code only if it matches */		\
+	if (ether_addr_equal(_sta->sta.addr, (_addr)))
+
+/*
+ * Get STA info by index, BROKEN!
+ */
+struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
+				     int idx);
+/*
+ * Create a new STA info, caller owns returned structure
+ * until sta_info_insert().
+ */
+struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
+				const u8 *addr, gfp_t gfp);
+
+void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
+
+/*
+ * Insert STA info into hash table/list, returns zero or a
+ * -EEXIST if (if the same MAC address is already present).
+ *
+ * Calling the non-rcu version makes the caller relinquish,
+ * the _rcu version calls read_lock_rcu() and must be called
+ * without it held.
+ */
+int sta_info_insert(struct sta_info *sta);
+int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
+
+int __must_check __sta_info_destroy(struct sta_info *sta);
+int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
+			  const u8 *addr);
+int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
+			      const u8 *addr);
+
+void sta_info_recalc_tim(struct sta_info *sta);
+
+void sta_info_init(struct ieee80211_local *local);
+void sta_info_stop(struct ieee80211_local *local);
+int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata);
+
+/**
+ * sta_info_flush_cleanup - flush the sta_info cleanup queue
+ * @sdata: the interface
+ *
+ * Flushes the sta_info cleanup queue for a given interface;
+ * this is necessary before the interface is removed or, for
+ * AP/mesh interfaces, before it is deconfigured.
+ *
+ * Note an rcu_barrier() must precede the function, after all
+ * stations have been flushed/removed to ensure the call_rcu()
+ * calls that add stations to the cleanup queue have completed.
+ */
+void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata);
+
+/**
+ * sta_info_flush - flush matching STA entries from the STA table
+ *
+ * Returns the number of removed STA entries.
+ *
+ * @sdata: sdata to remove all stations from
+ */
+static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
+{
+	int ret = sta_info_flush_defer(sdata);
+
+	rcu_barrier();
+	sta_info_flush_cleanup(sdata);
+
+	return ret;
+}
+
+void sta_set_rate_info_tx(struct sta_info *sta,
+			  const struct ieee80211_tx_rate *rate,
+			  struct rate_info *rinfo);
+void sta_set_rate_info_rx(struct sta_info *sta,
+			  struct rate_info *rinfo);
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+			  unsigned long exp_time);
+
+void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
+void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
+void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
+
+void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata);
+
+#endif /* STA_INFO_H */
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
new file mode 100644
index 0000000..9e78206
--- /dev/null
+++ b/net/mac80211/status.c
@@ -0,0 +1,694 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2008-2010	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/export.h>
+#include <linux/etherdevice.h>
+#include <net/mac80211.h>
+#include <asm/unaligned.h>
+#include "ieee80211_i.h"
+#include "rate.h"
+#include "mesh.h"
+#include "led.h"
+#include "wme.h"
+
+
+void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
+				 struct sk_buff *skb)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int tmp;
+
+	skb->pkt_type = IEEE80211_TX_STATUS_MSG;
+	skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
+		       &local->skb_queue : &local->skb_queue_unreliable, skb);
+	tmp = skb_queue_len(&local->skb_queue) +
+		skb_queue_len(&local->skb_queue_unreliable);
+	while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
+	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+		ieee80211_free_txskb(hw, skb);
+		tmp--;
+		I802_DEBUG_INC(local->tx_status_drop);
+	}
+	tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
+
+static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
+					    struct sta_info *sta,
+					    struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (void *)skb->data;
+	int ac;
+
+	/*
+	 * This skb 'survived' a round-trip through the driver, and
+	 * hopefully the driver didn't mangle it too badly. However,
+	 * we can definitely not rely on the control information
+	 * being correct. Clear it so we don't get junk there, and
+	 * indicate that it needs new processing, but must not be
+	 * modified/encrypted again.
+	 */
+	memset(&info->control, 0, sizeof(info->control));
+
+	info->control.jiffies = jiffies;
+	info->control.vif = &sta->sdata->vif;
+	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
+		       IEEE80211_TX_INTFL_RETRANSMISSION;
+	info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
+
+	sta->tx_filtered_count++;
+
+	/*
+	 * Clear more-data bit on filtered frames, it might be set
+	 * but later frames might time out so it might have to be
+	 * clear again ... It's all rather unlikely (this frame
+	 * should time out first, right?) but let's not confuse
+	 * peers unnecessarily.
+	 */
+	if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
+		hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+
+	if (ieee80211_is_data_qos(hdr->frame_control)) {
+		u8 *p = ieee80211_get_qos_ctl(hdr);
+		int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
+
+		/*
+		 * Clear EOSP if set, this could happen e.g.
+		 * if an absence period (us being a P2P GO)
+		 * shortens the SP.
+		 */
+		if (*p & IEEE80211_QOS_CTL_EOSP)
+			*p &= ~IEEE80211_QOS_CTL_EOSP;
+		ac = ieee802_1d_to_ac[tid & 7];
+	} else {
+		ac = IEEE80211_AC_BE;
+	}
+
+	/*
+	 * Clear the TX filter mask for this STA when sending the next
+	 * packet. If the STA went to power save mode, this will happen
+	 * when it wakes up for the next time.
+	 */
+	set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
+
+	/*
+	 * This code races in the following way:
+	 *
+	 *  (1) STA sends frame indicating it will go to sleep and does so
+	 *  (2) hardware/firmware adds STA to filter list, passes frame up
+	 *  (3) hardware/firmware processes TX fifo and suppresses a frame
+	 *  (4) we get TX status before having processed the frame and
+	 *	knowing that the STA has gone to sleep.
+	 *
+	 * This is actually quite unlikely even when both those events are
+	 * processed from interrupts coming in quickly after one another or
+	 * even at the same time because we queue both TX status events and
+	 * RX frames to be processed by a tasklet and process them in the
+	 * same order that they were received or TX status last. Hence, there
+	 * is no race as long as the frame RX is processed before the next TX
+	 * status, which drivers can ensure, see below.
+	 *
+	 * Note that this can only happen if the hardware or firmware can
+	 * actually add STAs to the filter list, if this is done by the
+	 * driver in response to set_tim() (which will only reduce the race
+	 * this whole filtering tries to solve, not completely solve it)
+	 * this situation cannot happen.
+	 *
+	 * To completely solve this race drivers need to make sure that they
+	 *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
+	 *	functions and
+	 *  (b) always process RX events before TX status events if ordering
+	 *      can be unknown, for example with different interrupt status
+	 *	bits.
+	 *  (c) if PS mode transitions are manual (i.e. the flag
+	 *      %IEEE80211_HW_AP_LINK_PS is set), always process PS state
+	 *      changes before calling TX status events if ordering can be
+	 *	unknown.
+	 */
+	if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
+	    skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
+		skb_queue_tail(&sta->tx_filtered[ac], skb);
+		sta_info_recalc_tim(sta);
+
+		if (!timer_pending(&local->sta_cleanup))
+			mod_timer(&local->sta_cleanup,
+				  round_jiffies(jiffies +
+						STA_INFO_CLEANUP_INTERVAL));
+		return;
+	}
+
+	if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
+	    !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
+		/* Software retry the packet once */
+		info->flags |= IEEE80211_TX_INTFL_RETRIED;
+		ieee80211_add_pending_skb(local, skb);
+		return;
+	}
+
+	ps_dbg_ratelimited(sta->sdata,
+			   "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
+			   skb_queue_len(&sta->tx_filtered[ac]),
+			   !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
+	ieee80211_free_txskb(&local->hw, skb);
+}
+
+static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
+{
+	struct tid_ampdu_tx *tid_tx;
+
+	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
+	if (!tid_tx || !tid_tx->bar_pending)
+		return;
+
+	tid_tx->bar_pending = false;
+	ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
+}
+
+static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
+{
+	struct ieee80211_mgmt *mgmt = (void *) skb->data;
+	struct ieee80211_local *local = sta->local;
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+
+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		sta->last_rx = jiffies;
+
+	if (ieee80211_is_data_qos(mgmt->frame_control)) {
+		struct ieee80211_hdr *hdr = (void *) skb->data;
+		u8 *qc = ieee80211_get_qos_ctl(hdr);
+		u16 tid = qc[0] & 0xf;
+
+		ieee80211_check_pending_bar(sta, hdr->addr1, tid);
+	}
+
+	if (ieee80211_is_action(mgmt->frame_control) &&
+	    mgmt->u.action.category == WLAN_CATEGORY_HT &&
+	    mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
+	    sdata->vif.type == NL80211_IFTYPE_STATION &&
+	    ieee80211_sdata_running(sdata)) {
+		/*
+		 * This update looks racy, but isn't -- if we come
+		 * here we've definitely got a station that we're
+		 * talking to, and on a managed interface that can
+		 * only be the AP. And the only other place updating
+		 * this variable in managed mode is before association.
+		 */
+		switch (mgmt->u.action.u.ht_smps.smps_control) {
+		case WLAN_HT_SMPS_CONTROL_DYNAMIC:
+			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
+			break;
+		case WLAN_HT_SMPS_CONTROL_STATIC:
+			sdata->smps_mode = IEEE80211_SMPS_STATIC;
+			break;
+		case WLAN_HT_SMPS_CONTROL_DISABLED:
+		default: /* shouldn't happen since we don't send that */
+			sdata->smps_mode = IEEE80211_SMPS_OFF;
+			break;
+		}
+
+		ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
+	}
+}
+
+static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
+{
+	struct tid_ampdu_tx *tid_tx;
+
+	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
+	if (!tid_tx)
+		return;
+
+	tid_tx->failed_bar_ssn = ssn;
+	tid_tx->bar_pending = true;
+}
+
+static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info)
+{
+	int len = sizeof(struct ieee80211_radiotap_header);
+
+	/* IEEE80211_RADIOTAP_RATE rate */
+	if (info->status.rates[0].idx >= 0 &&
+	    !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
+		len += 2;
+
+	/* IEEE80211_RADIOTAP_TX_FLAGS */
+	len += 2;
+
+	/* IEEE80211_RADIOTAP_DATA_RETRIES */
+	len += 1;
+
+	/* IEEE80211_TX_RC_MCS */
+	if (info->status.rates[0].idx >= 0 &&
+	    info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
+		len += 3;
+
+	return len;
+}
+
+static void ieee80211_add_tx_radiotap_header(struct ieee80211_supported_band
+					     *sband, struct sk_buff *skb,
+					     int retry_count, int rtap_len)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_radiotap_header *rthdr;
+	unsigned char *pos;
+	u16 txflags;
+
+	rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len);
+
+	memset(rthdr, 0, rtap_len);
+	rthdr->it_len = cpu_to_le16(rtap_len);
+	rthdr->it_present =
+		cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
+			    (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
+	pos = (unsigned char *)(rthdr + 1);
+
+	/*
+	 * XXX: Once radiotap gets the bitmap reset thing the vendor
+	 *	extensions proposal contains, we can actually report
+	 *	the whole set of tries we did.
+	 */
+
+	/* IEEE80211_RADIOTAP_RATE */
+	if (info->status.rates[0].idx >= 0 &&
+	    !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) {
+		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
+		*pos = sband->bitrates[info->status.rates[0].idx].bitrate / 5;
+		/* padding for tx flags */
+		pos += 2;
+	}
+
+	/* IEEE80211_RADIOTAP_TX_FLAGS */
+	txflags = 0;
+	if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
+	    !is_multicast_ether_addr(hdr->addr1))
+		txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
+
+	if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
+	    (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
+		txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
+	else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
+		txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
+
+	put_unaligned_le16(txflags, pos);
+	pos += 2;
+
+	/* IEEE80211_RADIOTAP_DATA_RETRIES */
+	/* for now report the total retry_count */
+	*pos = retry_count;
+	pos++;
+
+	/* IEEE80211_TX_RC_MCS */
+	if (info->status.rates[0].idx >= 0 &&
+	    info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
+		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
+		pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
+			 IEEE80211_RADIOTAP_MCS_HAVE_GI |
+			 IEEE80211_RADIOTAP_MCS_HAVE_BW;
+		if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
+			pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
+		if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+			pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
+		if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
+			pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
+		pos[2] = info->status.rates[0].idx;
+		pos += 3;
+	}
+
+}
+
+static void ieee80211_report_used_skb(struct ieee80211_local *local,
+				      struct sk_buff *skb, bool dropped)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (void *)skb->data;
+	bool acked = info->flags & IEEE80211_TX_STAT_ACK;
+
+	if (dropped)
+		acked = false;
+
+	if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
+			   IEEE80211_TX_INTFL_MLME_CONN_TX)) {
+		struct ieee80211_sub_if_data *sdata = NULL;
+		struct ieee80211_sub_if_data *iter_sdata;
+		u64 cookie = (unsigned long)skb;
+
+		rcu_read_lock();
+
+		if (skb->dev) {
+			list_for_each_entry_rcu(iter_sdata, &local->interfaces,
+						list) {
+				if (!iter_sdata->dev)
+					continue;
+
+				if (skb->dev == iter_sdata->dev) {
+					sdata = iter_sdata;
+					break;
+				}
+			}
+		} else {
+			sdata = rcu_dereference(local->p2p_sdata);
+		}
+
+		if (!sdata) {
+			skb->dev = NULL;
+		} else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
+			ieee80211_mgd_conn_tx_status(sdata, hdr->frame_control,
+						     acked);
+		} else if (ieee80211_is_nullfunc(hdr->frame_control) ||
+			   ieee80211_is_qos_nullfunc(hdr->frame_control)) {
+			cfg80211_probe_status(sdata->dev, hdr->addr1,
+					      cookie, acked, GFP_ATOMIC);
+		} else {
+			cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data,
+						skb->len, acked, GFP_ATOMIC);
+		}
+
+		rcu_read_unlock();
+	}
+
+	if (unlikely(info->ack_frame_id)) {
+		struct sk_buff *ack_skb;
+		unsigned long flags;
+
+		spin_lock_irqsave(&local->ack_status_lock, flags);
+		ack_skb = idr_find(&local->ack_status_frames,
+				   info->ack_frame_id);
+		if (ack_skb)
+			idr_remove(&local->ack_status_frames,
+				   info->ack_frame_id);
+		spin_unlock_irqrestore(&local->ack_status_lock, flags);
+
+		if (ack_skb) {
+			if (!dropped) {
+				/* consumes ack_skb */
+				skb_complete_wifi_ack(ack_skb, acked);
+			} else {
+				dev_kfree_skb_any(ack_skb);
+			}
+		}
+	}
+}
+
+/*
+ * Use a static threshold for now, best value to be determined
+ * by testing ...
+ * Should it depend on:
+ *  - on # of retransmissions
+ *  - current throughput (higher value for higher tpt)?
+ */
+#define STA_LOST_PKT_THRESHOLD	50
+
+void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+	struct sk_buff *skb2;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	__le16 fc;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_sub_if_data *sdata;
+	struct net_device *prev_dev = NULL;
+	struct sta_info *sta, *tmp;
+	int retry_count = -1, i;
+	int rates_idx = -1;
+	bool send_to_cooked;
+	bool acked;
+	struct ieee80211_bar *bar;
+	int rtap_len;
+
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+		if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
+		    !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
+			/* just the first aggr frame carry status info */
+			info->status.rates[i].idx = -1;
+			info->status.rates[i].count = 0;
+			break;
+		} else if (info->status.rates[i].idx < 0) {
+			break;
+		} else if (i >= hw->max_report_rates) {
+			/* the HW cannot have attempted that rate */
+			info->status.rates[i].idx = -1;
+			info->status.rates[i].count = 0;
+			break;
+		}
+
+		retry_count += info->status.rates[i].count;
+	}
+	rates_idx = i - 1;
+
+	if (retry_count < 0)
+		retry_count = 0;
+
+	rcu_read_lock();
+
+	sband = local->hw.wiphy->bands[info->band];
+	fc = hdr->frame_control;
+
+	for_each_sta_info(local, hdr->addr1, sta, tmp) {
+		/* skip wrong virtual interface */
+		if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
+			continue;
+
+		if (info->flags & IEEE80211_TX_STATUS_EOSP)
+			clear_sta_flag(sta, WLAN_STA_SP);
+
+		acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
+		if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
+			/*
+			 * The STA is in power save mode, so assume
+			 * that this TX packet failed because of that.
+			 */
+			ieee80211_handle_filtered_frame(local, sta, skb);
+			rcu_read_unlock();
+			return;
+		}
+
+		/* mesh Peer Service Period support */
+		if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
+		    ieee80211_is_data_qos(fc))
+			ieee80211_mpsp_trigger_process(
+					ieee80211_get_qos_ctl(hdr),
+					sta, true, acked);
+
+		if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) &&
+		    (rates_idx != -1))
+			sta->last_tx_rate = info->status.rates[rates_idx];
+
+		if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
+		    (ieee80211_is_data_qos(fc))) {
+			u16 tid, ssn;
+			u8 *qc;
+
+			qc = ieee80211_get_qos_ctl(hdr);
+			tid = qc[0] & 0xf;
+			ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
+						& IEEE80211_SCTL_SEQ);
+			ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
+					   tid, ssn);
+		}
+
+		if (!acked && ieee80211_is_back_req(fc)) {
+			u16 tid, control;
+
+			/*
+			 * BAR failed, store the last SSN and retry sending
+			 * the BAR when the next unicast transmission on the
+			 * same TID succeeds.
+			 */
+			bar = (struct ieee80211_bar *) skb->data;
+			control = le16_to_cpu(bar->control);
+			if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
+				u16 ssn = le16_to_cpu(bar->start_seq_num);
+
+				tid = (control &
+				       IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
+				      IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
+
+				ieee80211_set_bar_pending(sta, tid, ssn);
+			}
+		}
+
+		if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
+			ieee80211_handle_filtered_frame(local, sta, skb);
+			rcu_read_unlock();
+			return;
+		} else {
+			if (!acked)
+				sta->tx_retry_failed++;
+			sta->tx_retry_count += retry_count;
+		}
+
+		rate_control_tx_status(local, sband, sta, skb);
+		if (ieee80211_vif_is_mesh(&sta->sdata->vif))
+			ieee80211s_update_metric(local, sta, skb);
+
+		if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
+			ieee80211_frame_acked(sta, skb);
+
+		if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
+		    (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
+			ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked);
+
+		if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
+			if (info->flags & IEEE80211_TX_STAT_ACK) {
+				if (sta->lost_packets)
+					sta->lost_packets = 0;
+			} else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) {
+				cfg80211_cqm_pktloss_notify(sta->sdata->dev,
+							    sta->sta.addr,
+							    sta->lost_packets,
+							    GFP_ATOMIC);
+				sta->lost_packets = 0;
+			}
+		}
+
+		if (acked)
+			sta->last_ack_signal = info->status.ack_signal;
+	}
+
+	rcu_read_unlock();
+
+	ieee80211_led_tx(local, 0);
+
+	/* SNMP counters
+	 * Fragments are passed to low-level drivers as separate skbs, so these
+	 * are actually fragments, not frames. Update frame counters only for
+	 * the first fragment of the frame. */
+	if (info->flags & IEEE80211_TX_STAT_ACK) {
+		if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
+			local->dot11TransmittedFrameCount++;
+			if (is_multicast_ether_addr(hdr->addr1))
+				local->dot11MulticastTransmittedFrameCount++;
+			if (retry_count > 0)
+				local->dot11RetryCount++;
+			if (retry_count > 1)
+				local->dot11MultipleRetryCount++;
+		}
+
+		/* This counter shall be incremented for an acknowledged MPDU
+		 * with an individual address in the address 1 field or an MPDU
+		 * with a multicast address in the address 1 field of type Data
+		 * or Management. */
+		if (!is_multicast_ether_addr(hdr->addr1) ||
+		    ieee80211_is_data(fc) ||
+		    ieee80211_is_mgmt(fc))
+			local->dot11TransmittedFragmentCount++;
+	} else {
+		if (ieee80211_is_first_frag(hdr->seq_ctrl))
+			local->dot11FailedCount++;
+	}
+
+	if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
+	    (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
+	    !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
+	    local->ps_sdata && !(local->scanning)) {
+		if (info->flags & IEEE80211_TX_STAT_ACK) {
+			local->ps_sdata->u.mgd.flags |=
+					IEEE80211_STA_NULLFUNC_ACKED;
+		} else
+			mod_timer(&local->dynamic_ps_timer, jiffies +
+					msecs_to_jiffies(10));
+	}
+
+	ieee80211_report_used_skb(local, skb, false);
+
+	/* this was a transmitted frame, but now we want to reuse it */
+	skb_orphan(skb);
+
+	/* Need to make a copy before skb->cb gets cleared */
+	send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
+			 !(ieee80211_is_data(fc));
+
+	/*
+	 * This is a bit racy but we can avoid a lot of work
+	 * with this test...
+	 */
+	if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	/* send frame to monitor interfaces now */
+	rtap_len = ieee80211_tx_radiotap_len(info);
+	if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
+		pr_err("ieee80211_tx_status: headroom too small\n");
+		dev_kfree_skb(skb);
+		return;
+	}
+	ieee80211_add_tx_radiotap_header(sband, skb, retry_count, rtap_len);
+
+	/* XXX: is this sufficient for BPF? */
+	skb_set_mac_header(skb, 0);
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = htons(ETH_P_802_2);
+	memset(skb->cb, 0, sizeof(skb->cb));
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
+			if (!ieee80211_sdata_running(sdata))
+				continue;
+
+			if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
+			    !send_to_cooked)
+				continue;
+
+			if (prev_dev) {
+				skb2 = skb_clone(skb, GFP_ATOMIC);
+				if (skb2) {
+					skb2->dev = prev_dev;
+					netif_rx(skb2);
+				}
+			}
+
+			prev_dev = sdata->dev;
+		}
+	}
+	if (prev_dev) {
+		skb->dev = prev_dev;
+		netif_rx(skb);
+		skb = NULL;
+	}
+	rcu_read_unlock();
+	dev_kfree_skb(skb);
+}
+EXPORT_SYMBOL(ieee80211_tx_status);
+
+void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
+{
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+	cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
+				    num_packets, GFP_ATOMIC);
+}
+EXPORT_SYMBOL(ieee80211_report_low_ack);
+
+void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	ieee80211_report_used_skb(local, skb, true);
+	dev_kfree_skb_any(skb);
+}
+EXPORT_SYMBOL(ieee80211_free_txskb);
+
+void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
+			      struct sk_buff_head *skbs)
+{
+	struct sk_buff *skb;
+
+	while ((skb = __skb_dequeue(skbs)))
+		ieee80211_free_txskb(hw, skb);
+}
diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c
new file mode 100644
index 0000000..124b1fd
--- /dev/null
+++ b/net/mac80211/tkip.c
@@ -0,0 +1,314 @@
+/*
+ * Copyright 2002-2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <linux/types.h>
+#include <linux/netdevice.h>
+#include <linux/export.h>
+#include <asm/unaligned.h>
+
+#include <net/mac80211.h>
+#include "driver-ops.h"
+#include "key.h"
+#include "tkip.h"
+#include "wep.h"
+
+#define PHASE1_LOOP_COUNT 8
+
+/*
+ * 2-byte by 2-byte subset of the full AES S-box table; second part of this
+ * table is identical to first part but byte-swapped
+ */
+static const u16 tkip_sbox[256] =
+{
+	0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
+	0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
+	0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
+	0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B,
+	0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F,
+	0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F,
+	0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5,
+	0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F,
+	0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB,
+	0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397,
+	0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED,
+	0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A,
+	0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194,
+	0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3,
+	0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104,
+	0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D,
+	0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39,
+	0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695,
+	0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83,
+	0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76,
+	0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4,
+	0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B,
+	0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0,
+	0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018,
+	0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751,
+	0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85,
+	0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12,
+	0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9,
+	0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7,
+	0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A,
+	0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8,
+	0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A,
+};
+
+static u16 tkipS(u16 val)
+{
+	return tkip_sbox[val & 0xff] ^ swab16(tkip_sbox[val >> 8]);
+}
+
+static u8 *write_tkip_iv(u8 *pos, u16 iv16)
+{
+	*pos++ = iv16 >> 8;
+	*pos++ = ((iv16 >> 8) | 0x20) & 0x7f;
+	*pos++ = iv16 & 0xFF;
+	return pos;
+}
+
+/*
+ * P1K := Phase1(TA, TK, TSC)
+ * TA = transmitter address (48 bits)
+ * TK = dot11DefaultKeyValue or dot11KeyMappingValue (128 bits)
+ * TSC = TKIP sequence counter (48 bits, only 32 msb bits used)
+ * P1K: 80 bits
+ */
+static void tkip_mixing_phase1(const u8 *tk, struct tkip_ctx *ctx,
+			       const u8 *ta, u32 tsc_IV32)
+{
+	int i, j;
+	u16 *p1k = ctx->p1k;
+
+	p1k[0] = tsc_IV32 & 0xFFFF;
+	p1k[1] = tsc_IV32 >> 16;
+	p1k[2] = get_unaligned_le16(ta + 0);
+	p1k[3] = get_unaligned_le16(ta + 2);
+	p1k[4] = get_unaligned_le16(ta + 4);
+
+	for (i = 0; i < PHASE1_LOOP_COUNT; i++) {
+		j = 2 * (i & 1);
+		p1k[0] += tkipS(p1k[4] ^ get_unaligned_le16(tk + 0 + j));
+		p1k[1] += tkipS(p1k[0] ^ get_unaligned_le16(tk + 4 + j));
+		p1k[2] += tkipS(p1k[1] ^ get_unaligned_le16(tk + 8 + j));
+		p1k[3] += tkipS(p1k[2] ^ get_unaligned_le16(tk + 12 + j));
+		p1k[4] += tkipS(p1k[3] ^ get_unaligned_le16(tk + 0 + j)) + i;
+	}
+	ctx->state = TKIP_STATE_PHASE1_DONE;
+	ctx->p1k_iv32 = tsc_IV32;
+}
+
+static void tkip_mixing_phase2(const u8 *tk, struct tkip_ctx *ctx,
+			       u16 tsc_IV16, u8 *rc4key)
+{
+	u16 ppk[6];
+	const u16 *p1k = ctx->p1k;
+	int i;
+
+	ppk[0] = p1k[0];
+	ppk[1] = p1k[1];
+	ppk[2] = p1k[2];
+	ppk[3] = p1k[3];
+	ppk[4] = p1k[4];
+	ppk[5] = p1k[4] + tsc_IV16;
+
+	ppk[0] += tkipS(ppk[5] ^ get_unaligned_le16(tk + 0));
+	ppk[1] += tkipS(ppk[0] ^ get_unaligned_le16(tk + 2));
+	ppk[2] += tkipS(ppk[1] ^ get_unaligned_le16(tk + 4));
+	ppk[3] += tkipS(ppk[2] ^ get_unaligned_le16(tk + 6));
+	ppk[4] += tkipS(ppk[3] ^ get_unaligned_le16(tk + 8));
+	ppk[5] += tkipS(ppk[4] ^ get_unaligned_le16(tk + 10));
+	ppk[0] += ror16(ppk[5] ^ get_unaligned_le16(tk + 12), 1);
+	ppk[1] += ror16(ppk[0] ^ get_unaligned_le16(tk + 14), 1);
+	ppk[2] += ror16(ppk[1], 1);
+	ppk[3] += ror16(ppk[2], 1);
+	ppk[4] += ror16(ppk[3], 1);
+	ppk[5] += ror16(ppk[4], 1);
+
+	rc4key = write_tkip_iv(rc4key, tsc_IV16);
+	*rc4key++ = ((ppk[5] ^ get_unaligned_le16(tk)) >> 1) & 0xFF;
+
+	for (i = 0; i < 6; i++)
+		put_unaligned_le16(ppk[i], rc4key + 2 * i);
+}
+
+/* Add TKIP IV and Ext. IV at @pos. @iv0, @iv1, and @iv2 are the first octets
+ * of the IV. Returns pointer to the octet following IVs (i.e., beginning of
+ * the packet payload). */
+u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key)
+{
+	lockdep_assert_held(&key->u.tkip.txlock);
+
+	pos = write_tkip_iv(pos, key->u.tkip.tx.iv16);
+	*pos++ = (key->conf.keyidx << 6) | (1 << 5) /* Ext IV */;
+	put_unaligned_le32(key->u.tkip.tx.iv32, pos);
+	return pos + 4;
+}
+
+static void ieee80211_compute_tkip_p1k(struct ieee80211_key *key, u32 iv32)
+{
+	struct ieee80211_sub_if_data *sdata = key->sdata;
+	struct tkip_ctx *ctx = &key->u.tkip.tx;
+	const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
+
+	lockdep_assert_held(&key->u.tkip.txlock);
+
+	/*
+	 * Update the P1K when the IV32 is different from the value it
+	 * had when we last computed it (or when not initialised yet).
+	 * This might flip-flop back and forth if packets are processed
+	 * out-of-order due to the different ACs, but then we have to
+	 * just compute the P1K more often.
+	 */
+	if (ctx->p1k_iv32 != iv32 || ctx->state == TKIP_STATE_NOT_INIT)
+		tkip_mixing_phase1(tk, ctx, sdata->vif.addr, iv32);
+}
+
+void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf,
+			       u32 iv32, u16 *p1k)
+{
+	struct ieee80211_key *key = (struct ieee80211_key *)
+			container_of(keyconf, struct ieee80211_key, conf);
+	struct tkip_ctx *ctx = &key->u.tkip.tx;
+
+	spin_lock_bh(&key->u.tkip.txlock);
+	ieee80211_compute_tkip_p1k(key, iv32);
+	memcpy(p1k, ctx->p1k, sizeof(ctx->p1k));
+	spin_unlock_bh(&key->u.tkip.txlock);
+}
+EXPORT_SYMBOL(ieee80211_get_tkip_p1k_iv);
+
+void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf,
+                               const u8 *ta, u32 iv32, u16 *p1k)
+{
+	const u8 *tk = &keyconf->key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
+	struct tkip_ctx ctx;
+
+	tkip_mixing_phase1(tk, &ctx, ta, iv32);
+	memcpy(p1k, ctx.p1k, sizeof(ctx.p1k));
+}
+EXPORT_SYMBOL(ieee80211_get_tkip_rx_p1k);
+
+void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf,
+			    struct sk_buff *skb, u8 *p2k)
+{
+	struct ieee80211_key *key = (struct ieee80211_key *)
+			container_of(keyconf, struct ieee80211_key, conf);
+	const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
+	struct tkip_ctx *ctx = &key->u.tkip.tx;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
+	u32 iv32 = get_unaligned_le32(&data[4]);
+	u16 iv16 = data[2] | (data[0] << 8);
+
+	spin_lock(&key->u.tkip.txlock);
+	ieee80211_compute_tkip_p1k(key, iv32);
+	tkip_mixing_phase2(tk, ctx, iv16, p2k);
+	spin_unlock(&key->u.tkip.txlock);
+}
+EXPORT_SYMBOL(ieee80211_get_tkip_p2k);
+
+/*
+ * Encrypt packet payload with TKIP using @key. @pos is a pointer to the
+ * beginning of the buffer containing payload. This payload must include
+ * the IV/Ext.IV and space for (taildroom) four octets for ICV.
+ * @payload_len is the length of payload (_not_ including IV/ICV length).
+ * @ta is the transmitter addresses.
+ */
+int ieee80211_tkip_encrypt_data(struct crypto_cipher *tfm,
+				struct ieee80211_key *key,
+				struct sk_buff *skb,
+				u8 *payload, size_t payload_len)
+{
+	u8 rc4key[16];
+
+	ieee80211_get_tkip_p2k(&key->conf, skb, rc4key);
+
+	return ieee80211_wep_encrypt_data(tfm, rc4key, 16,
+					  payload, payload_len);
+}
+
+/* Decrypt packet payload with TKIP using @key. @pos is a pointer to the
+ * beginning of the buffer containing IEEE 802.11 header payload, i.e.,
+ * including IV, Ext. IV, real data, Michael MIC, ICV. @payload_len is the
+ * length of payload, including IV, Ext. IV, MIC, ICV.  */
+int ieee80211_tkip_decrypt_data(struct crypto_cipher *tfm,
+				struct ieee80211_key *key,
+				u8 *payload, size_t payload_len, u8 *ta,
+				u8 *ra, int only_iv, int queue,
+				u32 *out_iv32, u16 *out_iv16)
+{
+	u32 iv32;
+	u32 iv16;
+	u8 rc4key[16], keyid, *pos = payload;
+	int res;
+	const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
+
+	if (payload_len < 12)
+		return -1;
+
+	iv16 = (pos[0] << 8) | pos[2];
+	keyid = pos[3];
+	iv32 = get_unaligned_le32(pos + 4);
+	pos += 8;
+
+	if (!(keyid & (1 << 5)))
+		return TKIP_DECRYPT_NO_EXT_IV;
+
+	if ((keyid >> 6) != key->conf.keyidx)
+		return TKIP_DECRYPT_INVALID_KEYIDX;
+
+	if (key->u.tkip.rx[queue].state != TKIP_STATE_NOT_INIT &&
+	    (iv32 < key->u.tkip.rx[queue].iv32 ||
+	     (iv32 == key->u.tkip.rx[queue].iv32 &&
+	      iv16 <= key->u.tkip.rx[queue].iv16)))
+		return TKIP_DECRYPT_REPLAY;
+
+	if (only_iv) {
+		res = TKIP_DECRYPT_OK;
+		key->u.tkip.rx[queue].state = TKIP_STATE_PHASE1_HW_UPLOADED;
+		goto done;
+	}
+
+	if (key->u.tkip.rx[queue].state == TKIP_STATE_NOT_INIT ||
+	    key->u.tkip.rx[queue].iv32 != iv32) {
+		/* IV16 wrapped around - perform TKIP phase 1 */
+		tkip_mixing_phase1(tk, &key->u.tkip.rx[queue], ta, iv32);
+	}
+	if (key->local->ops->update_tkip_key &&
+	    key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
+	    key->u.tkip.rx[queue].state != TKIP_STATE_PHASE1_HW_UPLOADED) {
+		struct ieee80211_sub_if_data *sdata = key->sdata;
+
+		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+			sdata = container_of(key->sdata->bss,
+					struct ieee80211_sub_if_data, u.ap);
+		drv_update_tkip_key(key->local, sdata, &key->conf, key->sta,
+				iv32, key->u.tkip.rx[queue].p1k);
+		key->u.tkip.rx[queue].state = TKIP_STATE_PHASE1_HW_UPLOADED;
+	}
+
+	tkip_mixing_phase2(tk, &key->u.tkip.rx[queue], iv16, rc4key);
+
+	res = ieee80211_wep_decrypt_data(tfm, rc4key, 16, pos, payload_len - 12);
+ done:
+	if (res == TKIP_DECRYPT_OK) {
+		/*
+		 * Record previously received IV, will be copied into the
+		 * key information after MIC verification. It is possible
+		 * that we don't catch replays of fragments but that's ok
+		 * because the Michael MIC verication will then fail.
+		 */
+		*out_iv32 = iv32;
+		*out_iv16 = iv16;
+	}
+
+	return res;
+}
diff --git a/net/mac80211/tkip.h b/net/mac80211/tkip.h
new file mode 100644
index 0000000..e3ecb65
--- /dev/null
+++ b/net/mac80211/tkip.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2002-2004, Instant802 Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef TKIP_H
+#define TKIP_H
+
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include "key.h"
+
+u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key);
+
+int ieee80211_tkip_encrypt_data(struct crypto_cipher *tfm,
+				struct ieee80211_key *key,
+				struct sk_buff *skb,
+				u8 *payload, size_t payload_len);
+
+enum {
+	TKIP_DECRYPT_OK = 0,
+	TKIP_DECRYPT_NO_EXT_IV = -1,
+	TKIP_DECRYPT_INVALID_KEYIDX = -2,
+	TKIP_DECRYPT_REPLAY = -3,
+};
+int ieee80211_tkip_decrypt_data(struct crypto_cipher *tfm,
+				struct ieee80211_key *key,
+				u8 *payload, size_t payload_len, u8 *ta,
+				u8 *ra, int only_iv, int queue,
+				u32 *out_iv32, u16 *out_iv16);
+
+#endif /* TKIP_H */
diff --git a/net/mac80211/trace.c b/net/mac80211/trace.c
new file mode 100644
index 0000000..a25d60e
--- /dev/null
+++ b/net/mac80211/trace.c
@@ -0,0 +1,95 @@
+/* bug in tracepoint.h, it should include this */
+#include <linux/module.h>
+
+/* sparse isn't too happy with all macros... */
+#ifndef __CHECKER__
+#include <net/cfg80211.h>
+#include "driver-ops.h"
+#include "debug.h"
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
+#ifdef CPTCFG_MAC80211_MESSAGE_TRACING
+void __sdata_info(const char *fmt, ...)
+{
+	struct va_format vaf = {
+		.fmt = fmt,
+	};
+	va_list args, args2;
+
+	va_start(args, fmt);
+
+	va_copy(args2, args);
+	vaf.va = &args2;
+	pr_info("%pV", &vaf);
+	va_end(args2);
+
+	vaf.va = &args;
+	trace_mac80211_info(&vaf);
+	va_end(args);
+}
+
+void __sdata_dbg(bool print, const char *fmt, ...)
+{
+	struct va_format vaf = {
+		.fmt = fmt,
+	};
+	va_list args;
+
+	va_start(args, fmt);
+
+	if (print) {
+		va_list args2;
+
+		va_copy(args2, args);
+		vaf.va = &args2;
+		pr_debug("%pV", &vaf);
+		va_end(args2);
+	}
+	vaf.va = &args;
+	trace_mac80211_dbg(&vaf);
+	va_end(args);
+}
+
+void __sdata_err(const char *fmt, ...)
+{
+	struct va_format vaf = {
+		.fmt = fmt,
+	};
+	va_list args, args2;
+
+	va_start(args, fmt);
+
+	va_copy(args2, args);
+	vaf.va = &args2;
+	pr_err("%pV", &vaf);
+	va_end(args2);
+
+	vaf.va = &args;
+	trace_mac80211_err(&vaf);
+	va_end(args);
+}
+
+void __wiphy_dbg(struct wiphy *wiphy, bool print, const char *fmt, ...)
+{
+	struct va_format vaf = {
+		.fmt = fmt,
+	};
+	va_list args;
+
+	va_start(args, fmt);
+
+	if (print) {
+		va_list args2;
+
+		va_copy(args2, args);
+		vaf.va = &args2;
+		pr_debug("%pV", &vaf);
+		va_end(args2);
+	}
+	vaf.va = &args;
+	trace_mac80211_dbg(&vaf);
+	va_end(args);
+}
+#endif
+#endif
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
new file mode 100644
index 0000000..57d9dca
--- /dev/null
+++ b/net/mac80211/trace.h
@@ -0,0 +1,1953 @@
+#if !defined(__MAC80211_DRIVER_TRACE) || defined(TRACE_HEADER_MULTI_READ)
+#define __MAC80211_DRIVER_TRACE
+
+#include <linux/tracepoint.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM mac80211
+
+#define MAXNAME		32
+#define LOCAL_ENTRY	__array(char, wiphy_name, 32)
+#define LOCAL_ASSIGN	strlcpy(__entry->wiphy_name, wiphy_name(local->hw.wiphy), MAXNAME)
+#define LOCAL_PR_FMT	"%s"
+#define LOCAL_PR_ARG	__entry->wiphy_name
+
+#define STA_ENTRY	__array(char, sta_addr, ETH_ALEN)
+#define STA_ASSIGN	(sta ? memcpy(__entry->sta_addr, sta->addr, ETH_ALEN) : memset(__entry->sta_addr, 0, ETH_ALEN))
+#define STA_PR_FMT	" sta:%pM"
+#define STA_PR_ARG	__entry->sta_addr
+
+#define VIF_ENTRY	__field(enum nl80211_iftype, vif_type) __field(void *, sdata)	\
+			__field(bool, p2p)						\
+			__string(vif_name, sdata->dev ? sdata->dev->name : "<nodev>")
+#define VIF_ASSIGN	__entry->vif_type = sdata->vif.type; __entry->sdata = sdata;	\
+			__entry->p2p = sdata->vif.p2p;					\
+			__assign_str(vif_name, sdata->dev ? sdata->dev->name : sdata->name)
+#define VIF_PR_FMT	" vif:%s(%d%s)"
+#define VIF_PR_ARG	__get_str(vif_name), __entry->vif_type, __entry->p2p ? "/p2p" : ""
+
+#define CHANDEF_ENTRY	__field(u32, control_freq)					\
+			__field(u32, chan_width)					\
+			__field(u32, center_freq1)					\
+			__field(u32, center_freq2)
+#define CHANDEF_ASSIGN(c)								\
+			__entry->control_freq = (c)->chan ? (c)->chan->center_freq : 0;	\
+			__entry->chan_width = (c)->width;				\
+			__entry->center_freq1 = (c)->center_freq1;			\
+			__entry->center_freq2 = (c)->center_freq2;
+#define CHANDEF_PR_FMT	" control:%d MHz width:%d center: %d/%d MHz"
+#define CHANDEF_PR_ARG	__entry->control_freq, __entry->chan_width,			\
+			__entry->center_freq1, __entry->center_freq2
+
+#define CHANCTX_ENTRY	CHANDEF_ENTRY							\
+			__field(u8, rx_chains_static)					\
+			__field(u8, rx_chains_dynamic)
+#define CHANCTX_ASSIGN	CHANDEF_ASSIGN(&ctx->conf.def)					\
+			__entry->rx_chains_static = ctx->conf.rx_chains_static;		\
+			__entry->rx_chains_dynamic = ctx->conf.rx_chains_dynamic
+#define CHANCTX_PR_FMT	CHANDEF_PR_FMT " chains:%d/%d"
+#define CHANCTX_PR_ARG	CHANDEF_PR_ARG,							\
+			__entry->rx_chains_static, __entry->rx_chains_dynamic
+
+
+
+/*
+ * Tracing for driver callbacks.
+ */
+
+DECLARE_EVENT_CLASS(local_only_evt,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local),
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+	),
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+	),
+	TP_printk(LOCAL_PR_FMT, LOCAL_PR_ARG)
+);
+
+DECLARE_EVENT_CLASS(local_sdata_addr_evt,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__array(char, addr, 6)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		memcpy(__entry->addr, sdata->vif.addr, 6);
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT " addr:%pM",
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->addr
+	)
+);
+
+DECLARE_EVENT_CLASS(local_u32_evt,
+	TP_PROTO(struct ieee80211_local *local, u32 value),
+	TP_ARGS(local, value),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u32, value)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->value = value;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " value:%d",
+		LOCAL_PR_ARG, __entry->value
+	)
+);
+
+DECLARE_EVENT_CLASS(local_sdata_evt,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT VIF_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG
+	)
+);
+
+DEFINE_EVENT(local_only_evt, drv_return_void,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(drv_return_int,
+	TP_PROTO(struct ieee80211_local *local, int ret),
+	TP_ARGS(local, ret),
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(int, ret)
+	),
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->ret = ret;
+	),
+	TP_printk(LOCAL_PR_FMT " - %d", LOCAL_PR_ARG, __entry->ret)
+);
+
+TRACE_EVENT(drv_return_bool,
+	TP_PROTO(struct ieee80211_local *local, bool ret),
+	TP_ARGS(local, ret),
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(bool, ret)
+	),
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->ret = ret;
+	),
+	TP_printk(LOCAL_PR_FMT " - %s", LOCAL_PR_ARG, (__entry->ret) ?
+		  "true" : "false")
+);
+
+TRACE_EVENT(drv_return_u64,
+	TP_PROTO(struct ieee80211_local *local, u64 ret),
+	TP_ARGS(local, ret),
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u64, ret)
+	),
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->ret = ret;
+	),
+	TP_printk(LOCAL_PR_FMT " - %llu", LOCAL_PR_ARG, __entry->ret)
+);
+
+DEFINE_EVENT(local_only_evt, drv_start,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+DEFINE_EVENT(local_u32_evt, drv_get_et_strings,
+	     TP_PROTO(struct ieee80211_local *local, u32 sset),
+	     TP_ARGS(local, sset)
+);
+
+DEFINE_EVENT(local_u32_evt, drv_get_et_sset_count,
+	     TP_PROTO(struct ieee80211_local *local, u32 sset),
+	     TP_ARGS(local, sset)
+);
+
+DEFINE_EVENT(local_only_evt, drv_get_et_stats,
+	     TP_PROTO(struct ieee80211_local *local),
+	     TP_ARGS(local)
+);
+
+DEFINE_EVENT(local_only_evt, drv_suspend,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+DEFINE_EVENT(local_only_evt, drv_resume,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(drv_set_wakeup,
+	TP_PROTO(struct ieee80211_local *local, bool enabled),
+	TP_ARGS(local, enabled),
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(bool, enabled)
+	),
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->enabled = enabled;
+	),
+	TP_printk(LOCAL_PR_FMT " enabled:%d", LOCAL_PR_ARG, __entry->enabled)
+);
+
+DEFINE_EVENT(local_only_evt, drv_stop,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+DEFINE_EVENT(local_sdata_addr_evt, drv_add_interface,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+TRACE_EVENT(drv_change_interface,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 enum nl80211_iftype type, bool p2p),
+
+	TP_ARGS(local, sdata, type, p2p),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u32, new_type)
+		__field(bool, new_p2p)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->new_type = type;
+		__entry->new_p2p = p2p;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT " new type:%d%s",
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->new_type,
+		__entry->new_p2p ? "/p2p" : ""
+	)
+);
+
+DEFINE_EVENT(local_sdata_addr_evt, drv_remove_interface,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+TRACE_EVENT(drv_config,
+	TP_PROTO(struct ieee80211_local *local,
+		 u32 changed),
+
+	TP_ARGS(local, changed),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u32, changed)
+		__field(u32, flags)
+		__field(int, power_level)
+		__field(int, dynamic_ps_timeout)
+		__field(int, max_sleep_period)
+		__field(u16, listen_interval)
+		__field(u8, long_frame_max_tx_count)
+		__field(u8, short_frame_max_tx_count)
+		CHANDEF_ENTRY
+		__field(int, smps)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->changed = changed;
+		__entry->flags = local->hw.conf.flags;
+		__entry->power_level = local->hw.conf.power_level;
+		__entry->dynamic_ps_timeout = local->hw.conf.dynamic_ps_timeout;
+		__entry->max_sleep_period = local->hw.conf.max_sleep_period;
+		__entry->listen_interval = local->hw.conf.listen_interval;
+		__entry->long_frame_max_tx_count =
+			local->hw.conf.long_frame_max_tx_count;
+		__entry->short_frame_max_tx_count =
+			local->hw.conf.short_frame_max_tx_count;
+		CHANDEF_ASSIGN(&local->hw.conf.chandef)
+		__entry->smps = local->hw.conf.smps_mode;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " ch:%#x" CHANDEF_PR_FMT,
+		LOCAL_PR_ARG, __entry->changed, CHANDEF_PR_ARG
+	)
+);
+
+TRACE_EVENT(drv_bss_info_changed,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_bss_conf *info,
+		 u32 changed),
+
+	TP_ARGS(local, sdata, info, changed),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u32, changed)
+		__field(bool, assoc)
+		__field(bool, ibss_joined)
+		__field(bool, ibss_creator)
+		__field(u16, aid)
+		__field(bool, cts)
+		__field(bool, shortpre)
+		__field(bool, shortslot)
+		__field(bool, enable_beacon)
+		__field(u8, dtimper)
+		__field(u16, bcnint)
+		__field(u16, assoc_cap)
+		__field(u64, sync_tsf)
+		__field(u32, sync_device_ts)
+		__field(u8, sync_dtim_count)
+		__field(u32, basic_rates)
+		__array(int, mcast_rate, IEEE80211_NUM_BANDS)
+		__field(u16, ht_operation_mode)
+		__field(s32, cqm_rssi_thold);
+		__field(s32, cqm_rssi_hyst);
+		__field(u32, channel_width);
+		__field(u32, channel_cfreq1);
+		__dynamic_array(u32, arp_addr_list,
+				info->arp_addr_cnt > IEEE80211_BSS_ARP_ADDR_LIST_LEN ?
+					IEEE80211_BSS_ARP_ADDR_LIST_LEN :
+					info->arp_addr_cnt);
+		__field(int, arp_addr_cnt);
+		__field(bool, qos);
+		__field(bool, idle);
+		__field(bool, ps);
+		__dynamic_array(u8, ssid, info->ssid_len);
+		__field(bool, hidden_ssid);
+		__field(int, txpower)
+		__field(u8, p2p_oppps_ctwindow)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->changed = changed;
+		__entry->aid = info->aid;
+		__entry->assoc = info->assoc;
+		__entry->ibss_joined = info->ibss_joined;
+		__entry->ibss_creator = info->ibss_creator;
+		__entry->shortpre = info->use_short_preamble;
+		__entry->cts = info->use_cts_prot;
+		__entry->shortslot = info->use_short_slot;
+		__entry->enable_beacon = info->enable_beacon;
+		__entry->dtimper = info->dtim_period;
+		__entry->bcnint = info->beacon_int;
+		__entry->assoc_cap = info->assoc_capability;
+		__entry->sync_tsf = info->sync_tsf;
+		__entry->sync_device_ts = info->sync_device_ts;
+		__entry->sync_dtim_count = info->sync_dtim_count;
+		__entry->basic_rates = info->basic_rates;
+		memcpy(__entry->mcast_rate, info->mcast_rate,
+		       sizeof(__entry->mcast_rate));
+		__entry->ht_operation_mode = info->ht_operation_mode;
+		__entry->cqm_rssi_thold = info->cqm_rssi_thold;
+		__entry->cqm_rssi_hyst = info->cqm_rssi_hyst;
+		__entry->channel_width = info->chandef.width;
+		__entry->channel_cfreq1 = info->chandef.center_freq1;
+		__entry->arp_addr_cnt = info->arp_addr_cnt;
+		memcpy(__get_dynamic_array(arp_addr_list), info->arp_addr_list,
+		       sizeof(u32) * (info->arp_addr_cnt > IEEE80211_BSS_ARP_ADDR_LIST_LEN ?
+					IEEE80211_BSS_ARP_ADDR_LIST_LEN :
+					info->arp_addr_cnt));
+		__entry->qos = info->qos;
+		__entry->idle = info->idle;
+		__entry->ps = info->ps;
+		memcpy(__get_dynamic_array(ssid), info->ssid, info->ssid_len);
+		__entry->hidden_ssid = info->hidden_ssid;
+		__entry->txpower = info->txpower;
+		__entry->p2p_oppps_ctwindow = info->p2p_noa_attr.oppps_ctwindow;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT " changed:%#x",
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->changed
+	)
+);
+
+TRACE_EVENT(drv_prepare_multicast,
+	TP_PROTO(struct ieee80211_local *local, int mc_count),
+
+	TP_ARGS(local, mc_count),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(int, mc_count)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->mc_count = mc_count;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " prepare mc (%d)",
+		LOCAL_PR_ARG, __entry->mc_count
+	)
+);
+
+TRACE_EVENT(drv_set_multicast_list,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata, int mc_count),
+
+	TP_ARGS(local, sdata, mc_count),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(bool, allmulti)
+		__field(int, mc_count)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->allmulti = sdata->flags & IEEE80211_SDATA_ALLMULTI;
+		__entry->mc_count = mc_count;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " configure mc filter, count=%d, allmulti=%d",
+		LOCAL_PR_ARG, __entry->mc_count, __entry->allmulti
+	)
+);
+
+TRACE_EVENT(drv_configure_filter,
+	TP_PROTO(struct ieee80211_local *local,
+		 unsigned int changed_flags,
+		 unsigned int *total_flags,
+		 u64 multicast),
+
+	TP_ARGS(local, changed_flags, total_flags, multicast),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(unsigned int, changed)
+		__field(unsigned int, total)
+		__field(u64, multicast)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->changed = changed_flags;
+		__entry->total = *total_flags;
+		__entry->multicast = multicast;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " changed:%#x total:%#x",
+		LOCAL_PR_ARG, __entry->changed, __entry->total
+	)
+);
+
+TRACE_EVENT(drv_set_tim,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta, bool set),
+
+	TP_ARGS(local, sta, set),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+		__field(bool, set)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		STA_ASSIGN;
+		__entry->set = set;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT STA_PR_FMT " set:%d",
+		LOCAL_PR_ARG, STA_PR_ARG, __entry->set
+	)
+);
+
+TRACE_EVENT(drv_set_key,
+	TP_PROTO(struct ieee80211_local *local,
+		 enum set_key_cmd cmd, struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_sta *sta,
+		 struct ieee80211_key_conf *key),
+
+	TP_ARGS(local, cmd, sdata, sta, key),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		STA_ENTRY
+		__field(u32, cipher)
+		__field(u8, hw_key_idx)
+		__field(u8, flags)
+		__field(s8, keyidx)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+		__entry->cipher = key->cipher;
+		__entry->flags = key->flags;
+		__entry->keyidx = key->keyidx;
+		__entry->hw_key_idx = key->hw_key_idx;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG
+	)
+);
+
+TRACE_EVENT(drv_update_tkip_key,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_key_conf *conf,
+		 struct ieee80211_sta *sta, u32 iv32),
+
+	TP_ARGS(local, sdata, conf, sta, iv32),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		STA_ENTRY
+		__field(u32, iv32)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+		__entry->iv32 = iv32;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT VIF_PR_FMT STA_PR_FMT " iv32:%#x",
+		LOCAL_PR_ARG,VIF_PR_ARG,STA_PR_ARG, __entry->iv32
+	)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_hw_scan,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_cancel_hw_scan,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_sched_scan_start,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_sched_scan_stop,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+DEFINE_EVENT(local_only_evt, drv_sw_scan_start,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+DEFINE_EVENT(local_only_evt, drv_sw_scan_complete,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(drv_get_stats,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_low_level_stats *stats,
+		 int ret),
+
+	TP_ARGS(local, stats, ret),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(int, ret)
+		__field(unsigned int, ackfail)
+		__field(unsigned int, rtsfail)
+		__field(unsigned int, fcserr)
+		__field(unsigned int, rtssucc)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->ret = ret;
+		__entry->ackfail = stats->dot11ACKFailureCount;
+		__entry->rtsfail = stats->dot11RTSFailureCount;
+		__entry->fcserr = stats->dot11FCSErrorCount;
+		__entry->rtssucc = stats->dot11RTSSuccessCount;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " ret:%d",
+		LOCAL_PR_ARG, __entry->ret
+	)
+);
+
+TRACE_EVENT(drv_get_tkip_seq,
+	TP_PROTO(struct ieee80211_local *local,
+		 u8 hw_key_idx, u32 *iv32, u16 *iv16),
+
+	TP_ARGS(local, hw_key_idx, iv32, iv16),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u8, hw_key_idx)
+		__field(u32, iv32)
+		__field(u16, iv16)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->hw_key_idx = hw_key_idx;
+		__entry->iv32 = *iv32;
+		__entry->iv16 = *iv16;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT, LOCAL_PR_ARG
+	)
+);
+
+DEFINE_EVENT(local_u32_evt, drv_set_frag_threshold,
+	TP_PROTO(struct ieee80211_local *local, u32 value),
+	TP_ARGS(local, value)
+);
+
+DEFINE_EVENT(local_u32_evt, drv_set_rts_threshold,
+	TP_PROTO(struct ieee80211_local *local, u32 value),
+	TP_ARGS(local, value)
+);
+
+TRACE_EVENT(drv_set_coverage_class,
+	TP_PROTO(struct ieee80211_local *local, u8 value),
+
+	TP_ARGS(local, value),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u8, value)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->value = value;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " value:%d",
+		LOCAL_PR_ARG, __entry->value
+	)
+);
+
+TRACE_EVENT(drv_sta_notify,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 enum sta_notify_cmd cmd,
+		 struct ieee80211_sta *sta),
+
+	TP_ARGS(local, sdata, cmd, sta),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		STA_ENTRY
+		__field(u32, cmd)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+		__entry->cmd = cmd;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT " cmd:%d",
+		LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, __entry->cmd
+	)
+);
+
+TRACE_EVENT(drv_sta_state,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_sta *sta,
+		 enum ieee80211_sta_state old_state,
+		 enum ieee80211_sta_state new_state),
+
+	TP_ARGS(local, sdata, sta, old_state, new_state),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		STA_ENTRY
+		__field(u32, old_state)
+		__field(u32, new_state)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+		__entry->old_state = old_state;
+		__entry->new_state = new_state;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT " state: %d->%d",
+		LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG,
+		__entry->old_state, __entry->new_state
+	)
+);
+
+TRACE_EVENT(drv_sta_rc_update,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_sta *sta,
+		 u32 changed),
+
+	TP_ARGS(local, sdata, sta, changed),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		STA_ENTRY
+		__field(u32, changed)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+		__entry->changed = changed;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT " changed: 0x%x",
+		LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, __entry->changed
+	)
+);
+
+TRACE_EVENT(drv_sta_add,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_sta *sta),
+
+	TP_ARGS(local, sdata, sta),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		STA_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG
+	)
+);
+
+TRACE_EVENT(drv_sta_remove,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_sta *sta),
+
+	TP_ARGS(local, sdata, sta),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		STA_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG
+	)
+);
+
+TRACE_EVENT(drv_conf_tx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 u16 ac, const struct ieee80211_tx_queue_params *params),
+
+	TP_ARGS(local, sdata, ac, params),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u16, ac)
+		__field(u16, txop)
+		__field(u16, cw_min)
+		__field(u16, cw_max)
+		__field(u8, aifs)
+		__field(bool, uapsd)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->ac = ac;
+		__entry->txop = params->txop;
+		__entry->cw_max = params->cw_max;
+		__entry->cw_min = params->cw_min;
+		__entry->aifs = params->aifs;
+		__entry->uapsd = params->uapsd;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  " AC:%d",
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->ac
+	)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_get_tsf,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+TRACE_EVENT(drv_set_tsf,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 u64 tsf),
+
+	TP_ARGS(local, sdata, tsf),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u64, tsf)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->tsf = tsf;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT  " tsf:%llu",
+		LOCAL_PR_ARG, VIF_PR_ARG, (unsigned long long)__entry->tsf
+	)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_reset_tsf,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+DEFINE_EVENT(local_only_evt, drv_tx_last_beacon,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(drv_ampdu_action,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 enum ieee80211_ampdu_mlme_action action,
+		 struct ieee80211_sta *sta, u16 tid,
+		 u16 *ssn, u8 buf_size),
+
+	TP_ARGS(local, sdata, action, sta, tid, ssn, buf_size),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+		__field(u32, action)
+		__field(u16, tid)
+		__field(u16, ssn)
+		__field(u8, buf_size)
+		VIF_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_ASSIGN;
+		__entry->action = action;
+		__entry->tid = tid;
+		__entry->ssn = ssn ? *ssn : 0;
+		__entry->buf_size = buf_size;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT VIF_PR_FMT STA_PR_FMT " action:%d tid:%d buf:%d",
+		LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, __entry->action,
+		__entry->tid, __entry->buf_size
+	)
+);
+
+TRACE_EVENT(drv_get_survey,
+	TP_PROTO(struct ieee80211_local *local, int idx,
+		 struct survey_info *survey),
+
+	TP_ARGS(local, idx, survey),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(int, idx)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->idx = idx;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " idx:%d",
+		LOCAL_PR_ARG, __entry->idx
+	)
+);
+
+TRACE_EVENT(drv_flush,
+	TP_PROTO(struct ieee80211_local *local,
+		 u32 queues, bool drop),
+
+	TP_ARGS(local, queues, drop),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(bool, drop)
+		__field(u32, queues)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->drop = drop;
+		__entry->queues = queues;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " queues:0x%x drop:%d",
+		LOCAL_PR_ARG, __entry->queues, __entry->drop
+	)
+);
+
+TRACE_EVENT(drv_channel_switch,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_channel_switch *ch_switch),
+
+	TP_ARGS(local, ch_switch),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		CHANDEF_ENTRY
+		__field(u64, timestamp)
+		__field(bool, block_tx)
+		__field(u8, count)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		CHANDEF_ASSIGN(&ch_switch->chandef)
+		__entry->timestamp = ch_switch->timestamp;
+		__entry->block_tx = ch_switch->block_tx;
+		__entry->count = ch_switch->count;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " new " CHANDEF_PR_FMT " count:%d",
+		LOCAL_PR_ARG, CHANDEF_PR_ARG, __entry->count
+	)
+);
+
+TRACE_EVENT(drv_set_antenna,
+	TP_PROTO(struct ieee80211_local *local, u32 tx_ant, u32 rx_ant, int ret),
+
+	TP_ARGS(local, tx_ant, rx_ant, ret),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u32, tx_ant)
+		__field(u32, rx_ant)
+		__field(int, ret)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->tx_ant = tx_ant;
+		__entry->rx_ant = rx_ant;
+		__entry->ret = ret;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " tx_ant:%d rx_ant:%d ret:%d",
+		LOCAL_PR_ARG, __entry->tx_ant, __entry->rx_ant, __entry->ret
+	)
+);
+
+TRACE_EVENT(drv_get_antenna,
+	TP_PROTO(struct ieee80211_local *local, u32 tx_ant, u32 rx_ant, int ret),
+
+	TP_ARGS(local, tx_ant, rx_ant, ret),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u32, tx_ant)
+		__field(u32, rx_ant)
+		__field(int, ret)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->tx_ant = tx_ant;
+		__entry->rx_ant = rx_ant;
+		__entry->ret = ret;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " tx_ant:%d rx_ant:%d ret:%d",
+		LOCAL_PR_ARG, __entry->tx_ant, __entry->rx_ant, __entry->ret
+	)
+);
+
+TRACE_EVENT(drv_remain_on_channel,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_channel *chan,
+		 unsigned int duration,
+		 enum ieee80211_roc_type type),
+
+	TP_ARGS(local, sdata, chan, duration, type),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(int, center_freq)
+		__field(unsigned int, duration)
+		__field(u32, type)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->center_freq = chan->center_freq;
+		__entry->duration = duration;
+		__entry->type = type;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT " freq:%dMHz duration:%dms type=%d",
+		LOCAL_PR_ARG, VIF_PR_ARG,
+		__entry->center_freq, __entry->duration, __entry->type
+	)
+);
+
+DEFINE_EVENT(local_only_evt, drv_cancel_remain_on_channel,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(drv_set_ringparam,
+	TP_PROTO(struct ieee80211_local *local, u32 tx, u32 rx),
+
+	TP_ARGS(local, tx, rx),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u32, tx)
+		__field(u32, rx)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->tx = tx;
+		__entry->rx = rx;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " tx:%d rx %d",
+		LOCAL_PR_ARG, __entry->tx, __entry->rx
+	)
+);
+
+TRACE_EVENT(drv_get_ringparam,
+	TP_PROTO(struct ieee80211_local *local, u32 *tx, u32 *tx_max,
+		 u32 *rx, u32 *rx_max),
+
+	TP_ARGS(local, tx, tx_max, rx, rx_max),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u32, tx)
+		__field(u32, tx_max)
+		__field(u32, rx)
+		__field(u32, rx_max)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->tx = *tx;
+		__entry->tx_max = *tx_max;
+		__entry->rx = *rx;
+		__entry->rx_max = *rx_max;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " tx:%d tx_max %d rx %d rx_max %d",
+		LOCAL_PR_ARG,
+		__entry->tx, __entry->tx_max, __entry->rx, __entry->rx_max
+	)
+);
+
+DEFINE_EVENT(local_only_evt, drv_tx_frames_pending,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+DEFINE_EVENT(local_only_evt, drv_offchannel_tx_cancel_wait,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(drv_set_bitrate_mask,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 const struct cfg80211_bitrate_mask *mask),
+
+	TP_ARGS(local, sdata, mask),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u32, legacy_2g)
+		__field(u32, legacy_5g)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->legacy_2g = mask->control[IEEE80211_BAND_2GHZ].legacy;
+		__entry->legacy_5g = mask->control[IEEE80211_BAND_5GHZ].legacy;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT " 2G Mask:0x%x 5G Mask:0x%x",
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->legacy_2g, __entry->legacy_5g
+	)
+);
+
+TRACE_EVENT(drv_set_rekey_data,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct cfg80211_gtk_rekey_data *data),
+
+	TP_ARGS(local, sdata, data),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__array(u8, kek, NL80211_KEK_LEN)
+		__array(u8, kck, NL80211_KCK_LEN)
+		__array(u8, replay_ctr, NL80211_REPLAY_CTR_LEN)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		memcpy(__entry->kek, data->kek, NL80211_KEK_LEN);
+		memcpy(__entry->kck, data->kck, NL80211_KCK_LEN);
+		memcpy(__entry->replay_ctr, data->replay_ctr,
+		       NL80211_REPLAY_CTR_LEN);
+	),
+
+	TP_printk(LOCAL_PR_FMT VIF_PR_FMT,
+		  LOCAL_PR_ARG, VIF_PR_ARG)
+);
+
+TRACE_EVENT(drv_rssi_callback,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 enum ieee80211_rssi_event rssi_event),
+
+	TP_ARGS(local, sdata, rssi_event),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u32, rssi_event)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->rssi_event = rssi_event;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT VIF_PR_FMT " rssi_event:%d",
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->rssi_event
+	)
+);
+
+DECLARE_EVENT_CLASS(release_evt,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta,
+		 u16 tids, int num_frames,
+		 enum ieee80211_frame_release_type reason,
+		 bool more_data),
+
+	TP_ARGS(local, sta, tids, num_frames, reason, more_data),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+		__field(u16, tids)
+		__field(int, num_frames)
+		__field(int, reason)
+		__field(bool, more_data)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		STA_ASSIGN;
+		__entry->tids = tids;
+		__entry->num_frames = num_frames;
+		__entry->reason = reason;
+		__entry->more_data = more_data;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT STA_PR_FMT
+		" TIDs:0x%.4x frames:%d reason:%d more:%d",
+		LOCAL_PR_ARG, STA_PR_ARG, __entry->tids, __entry->num_frames,
+		__entry->reason, __entry->more_data
+	)
+);
+
+DEFINE_EVENT(release_evt, drv_release_buffered_frames,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta,
+		 u16 tids, int num_frames,
+		 enum ieee80211_frame_release_type reason,
+		 bool more_data),
+
+	TP_ARGS(local, sta, tids, num_frames, reason, more_data)
+);
+
+DEFINE_EVENT(release_evt, drv_allow_buffered_frames,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta,
+		 u16 tids, int num_frames,
+		 enum ieee80211_frame_release_type reason,
+		 bool more_data),
+
+	TP_ARGS(local, sta, tids, num_frames, reason, more_data)
+);
+
+TRACE_EVENT(drv_get_rssi,
+	TP_PROTO(struct ieee80211_local *local, struct ieee80211_sta *sta,
+		 s8 rssi, int ret),
+
+	TP_ARGS(local, sta, rssi, ret),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+		__field(s8, rssi)
+		__field(int, ret)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		STA_ASSIGN;
+		__entry->rssi = rssi;
+		__entry->ret = ret;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT STA_PR_FMT " rssi:%d ret:%d",
+		LOCAL_PR_ARG, STA_PR_ARG, __entry->rssi, __entry->ret
+	)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_mgd_prepare_tx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+
+	TP_ARGS(local, sdata)
+);
+
+DECLARE_EVENT_CLASS(local_chanctx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_chanctx *ctx),
+
+	TP_ARGS(local, ctx),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		CHANCTX_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		CHANCTX_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT CHANCTX_PR_FMT,
+		LOCAL_PR_ARG, CHANCTX_PR_ARG
+	)
+);
+
+DEFINE_EVENT(local_chanctx, drv_add_chanctx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_chanctx *ctx),
+	TP_ARGS(local, ctx)
+);
+
+DEFINE_EVENT(local_chanctx, drv_remove_chanctx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_chanctx *ctx),
+	TP_ARGS(local, ctx)
+);
+
+TRACE_EVENT(drv_change_chanctx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_chanctx *ctx,
+		 u32 changed),
+
+	TP_ARGS(local, ctx, changed),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		CHANCTX_ENTRY
+		__field(u32, changed)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		CHANCTX_ASSIGN;
+		__entry->changed = changed;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT CHANCTX_PR_FMT " changed:%#x",
+		LOCAL_PR_ARG, CHANCTX_PR_ARG, __entry->changed
+	)
+);
+
+DECLARE_EVENT_CLASS(local_sdata_chanctx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_chanctx *ctx),
+
+	TP_ARGS(local, sdata, ctx),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		CHANCTX_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		CHANCTX_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT VIF_PR_FMT CHANCTX_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG, CHANCTX_PR_ARG
+	)
+);
+
+DEFINE_EVENT(local_sdata_chanctx, drv_assign_vif_chanctx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_chanctx *ctx),
+	TP_ARGS(local, sdata, ctx)
+);
+
+DEFINE_EVENT(local_sdata_chanctx, drv_unassign_vif_chanctx,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_chanctx *ctx),
+	TP_ARGS(local, sdata, ctx)
+);
+
+TRACE_EVENT(drv_start_ap,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_bss_conf *info),
+
+	TP_ARGS(local, sdata, info),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u8, dtimper)
+		__field(u16, bcnint)
+		__dynamic_array(u8, ssid, info->ssid_len);
+		__field(bool, hidden_ssid);
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->dtimper = info->dtim_period;
+		__entry->bcnint = info->beacon_int;
+		memcpy(__get_dynamic_array(ssid), info->ssid, info->ssid_len);
+		__entry->hidden_ssid = info->hidden_ssid;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT  VIF_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG
+	)
+);
+
+DEFINE_EVENT(local_sdata_evt, drv_stop_ap,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+
+DEFINE_EVENT(local_only_evt, drv_restart_complete,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+#if IS_ENABLED(CONFIG_IPV6)
+DEFINE_EVENT(local_sdata_evt, drv_ipv6_addr_change,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata),
+	TP_ARGS(local, sdata)
+);
+#endif
+
+/*
+ * Tracing for API calls that drivers call.
+ */
+
+TRACE_EVENT(api_start_tx_ba_session,
+	TP_PROTO(struct ieee80211_sta *sta, u16 tid),
+
+	TP_ARGS(sta, tid),
+
+	TP_STRUCT__entry(
+		STA_ENTRY
+		__field(u16, tid)
+	),
+
+	TP_fast_assign(
+		STA_ASSIGN;
+		__entry->tid = tid;
+	),
+
+	TP_printk(
+		STA_PR_FMT " tid:%d",
+		STA_PR_ARG, __entry->tid
+	)
+);
+
+TRACE_EVENT(api_start_tx_ba_cb,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata, const u8 *ra, u16 tid),
+
+	TP_ARGS(sdata, ra, tid),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+		__array(u8, ra, ETH_ALEN)
+		__field(u16, tid)
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+		memcpy(__entry->ra, ra, ETH_ALEN);
+		__entry->tid = tid;
+	),
+
+	TP_printk(
+		VIF_PR_FMT " ra:%pM tid:%d",
+		VIF_PR_ARG, __entry->ra, __entry->tid
+	)
+);
+
+TRACE_EVENT(api_stop_tx_ba_session,
+	TP_PROTO(struct ieee80211_sta *sta, u16 tid),
+
+	TP_ARGS(sta, tid),
+
+	TP_STRUCT__entry(
+		STA_ENTRY
+		__field(u16, tid)
+	),
+
+	TP_fast_assign(
+		STA_ASSIGN;
+		__entry->tid = tid;
+	),
+
+	TP_printk(
+		STA_PR_FMT " tid:%d",
+		STA_PR_ARG, __entry->tid
+	)
+);
+
+TRACE_EVENT(api_stop_tx_ba_cb,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata, const u8 *ra, u16 tid),
+
+	TP_ARGS(sdata, ra, tid),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+		__array(u8, ra, ETH_ALEN)
+		__field(u16, tid)
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+		memcpy(__entry->ra, ra, ETH_ALEN);
+		__entry->tid = tid;
+	),
+
+	TP_printk(
+		VIF_PR_FMT " ra:%pM tid:%d",
+		VIF_PR_ARG, __entry->ra, __entry->tid
+	)
+);
+
+DEFINE_EVENT(local_only_evt, api_restart_hw,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(api_beacon_loss,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata),
+
+	TP_ARGS(sdata),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+	),
+
+	TP_printk(
+		VIF_PR_FMT,
+		VIF_PR_ARG
+	)
+);
+
+TRACE_EVENT(api_connection_loss,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata),
+
+	TP_ARGS(sdata),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+	),
+
+	TP_printk(
+		VIF_PR_FMT,
+		VIF_PR_ARG
+	)
+);
+
+TRACE_EVENT(api_cqm_rssi_notify,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata,
+		 enum nl80211_cqm_rssi_threshold_event rssi_event),
+
+	TP_ARGS(sdata, rssi_event),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+		__field(u32, rssi_event)
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+		__entry->rssi_event = rssi_event;
+	),
+
+	TP_printk(
+		VIF_PR_FMT " event:%d",
+		VIF_PR_ARG, __entry->rssi_event
+	)
+);
+
+TRACE_EVENT(api_scan_completed,
+	TP_PROTO(struct ieee80211_local *local, bool aborted),
+
+	TP_ARGS(local, aborted),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(bool, aborted)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->aborted = aborted;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " aborted:%d",
+		LOCAL_PR_ARG, __entry->aborted
+	)
+);
+
+TRACE_EVENT(api_sched_scan_results,
+	TP_PROTO(struct ieee80211_local *local),
+
+	TP_ARGS(local),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT, LOCAL_PR_ARG
+	)
+);
+
+TRACE_EVENT(api_sched_scan_stopped,
+	TP_PROTO(struct ieee80211_local *local),
+
+	TP_ARGS(local),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT, LOCAL_PR_ARG
+	)
+);
+
+TRACE_EVENT(api_sta_block_awake,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta, bool block),
+
+	TP_ARGS(local, sta, block),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+		__field(bool, block)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		STA_ASSIGN;
+		__entry->block = block;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT STA_PR_FMT " block:%d",
+		LOCAL_PR_ARG, STA_PR_ARG, __entry->block
+	)
+);
+
+TRACE_EVENT(api_chswitch_done,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata, bool success),
+
+	TP_ARGS(sdata, success),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+		__field(bool, success)
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+		__entry->success = success;
+	),
+
+	TP_printk(
+		VIF_PR_FMT " success=%d",
+		VIF_PR_ARG, __entry->success
+	)
+);
+
+DEFINE_EVENT(local_only_evt, api_ready_on_channel,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+DEFINE_EVENT(local_only_evt, api_remain_on_channel_expired,
+	TP_PROTO(struct ieee80211_local *local),
+	TP_ARGS(local)
+);
+
+TRACE_EVENT(api_gtk_rekey_notify,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata,
+		 const u8 *bssid, const u8 *replay_ctr),
+
+	TP_ARGS(sdata, bssid, replay_ctr),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+		__array(u8, bssid, ETH_ALEN)
+		__array(u8, replay_ctr, NL80211_REPLAY_CTR_LEN)
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+		memcpy(__entry->bssid, bssid, ETH_ALEN);
+		memcpy(__entry->replay_ctr, replay_ctr, NL80211_REPLAY_CTR_LEN);
+	),
+
+	TP_printk(VIF_PR_FMT, VIF_PR_ARG)
+);
+
+TRACE_EVENT(api_enable_rssi_reports,
+	TP_PROTO(struct ieee80211_sub_if_data *sdata,
+		 int rssi_min_thold, int rssi_max_thold),
+
+	TP_ARGS(sdata, rssi_min_thold, rssi_max_thold),
+
+	TP_STRUCT__entry(
+		VIF_ENTRY
+		__field(int, rssi_min_thold)
+		__field(int, rssi_max_thold)
+	),
+
+	TP_fast_assign(
+		VIF_ASSIGN;
+		__entry->rssi_min_thold = rssi_min_thold;
+		__entry->rssi_max_thold = rssi_max_thold;
+	),
+
+	TP_printk(
+		VIF_PR_FMT " rssi_min_thold =%d, rssi_max_thold = %d",
+		VIF_PR_ARG, __entry->rssi_min_thold, __entry->rssi_max_thold
+	)
+);
+
+TRACE_EVENT(api_eosp,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta),
+
+	TP_ARGS(local, sta),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		STA_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT STA_PR_FMT,
+		LOCAL_PR_ARG, STA_PR_ARG
+	)
+);
+
+/*
+ * Tracing for internal functions
+ * (which may also be called in response to driver calls)
+ */
+
+TRACE_EVENT(wake_queue,
+	TP_PROTO(struct ieee80211_local *local, u16 queue,
+		 enum queue_stop_reason reason),
+
+	TP_ARGS(local, queue, reason),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u16, queue)
+		__field(u32, reason)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->queue = queue;
+		__entry->reason = reason;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " queue:%d, reason:%d",
+		LOCAL_PR_ARG, __entry->queue, __entry->reason
+	)
+);
+
+TRACE_EVENT(stop_queue,
+	TP_PROTO(struct ieee80211_local *local, u16 queue,
+		 enum queue_stop_reason reason),
+
+	TP_ARGS(local, queue, reason),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		__field(u16, queue)
+		__field(u32, reason)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		__entry->queue = queue;
+		__entry->reason = reason;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " queue:%d, reason:%d",
+		LOCAL_PR_ARG, __entry->queue, __entry->reason
+	)
+);
+
+TRACE_EVENT(drv_set_default_unicast_key,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 int key_idx),
+
+	TP_ARGS(local, sdata, key_idx),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(int, key_idx)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		__entry->key_idx = key_idx;
+	),
+
+	TP_printk(LOCAL_PR_FMT VIF_PR_FMT " key_idx:%d",
+		  LOCAL_PR_ARG, VIF_PR_ARG, __entry->key_idx)
+);
+
+TRACE_EVENT(api_radar_detected,
+	TP_PROTO(struct ieee80211_local *local),
+
+	TP_ARGS(local),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " radar detected",
+		LOCAL_PR_ARG
+	)
+);
+
+#ifdef CPTCFG_MAC80211_MESSAGE_TRACING
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM mac80211_msg
+
+#define MAX_MSG_LEN	100
+
+DECLARE_EVENT_CLASS(mac80211_msg_event,
+	TP_PROTO(struct va_format *vaf),
+
+	TP_ARGS(vaf),
+
+	TP_STRUCT__entry(
+		__dynamic_array(char, msg, MAX_MSG_LEN)
+	),
+
+	TP_fast_assign(
+		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
+				       MAX_MSG_LEN, vaf->fmt,
+				       *vaf->va) >= MAX_MSG_LEN);
+	),
+
+	TP_printk("%s", __get_str(msg))
+);
+
+DEFINE_EVENT(mac80211_msg_event, mac80211_info,
+	TP_PROTO(struct va_format *vaf),
+	TP_ARGS(vaf)
+);
+DEFINE_EVENT(mac80211_msg_event, mac80211_dbg,
+	TP_PROTO(struct va_format *vaf),
+	TP_ARGS(vaf)
+);
+DEFINE_EVENT(mac80211_msg_event, mac80211_err,
+	TP_PROTO(struct va_format *vaf),
+	TP_ARGS(vaf)
+);
+#endif
+
+#endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+#include <trace/define_trace.h>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
new file mode 100644
index 0000000..ca234f8
--- /dev/null
+++ b/net/mac80211/tx.c
@@ -0,0 +1,2746 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *
+ * Transmit and frame generation functions.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/bitmap.h>
+#include <linux/rcupdate.h>
+#include <linux/export.h>
+#include <net/net_namespace.h>
+#include <net/ieee80211_radiotap.h>
+#include <net/cfg80211.h>
+#include <net/mac80211.h>
+#include <asm/unaligned.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "led.h"
+#include "mesh.h"
+#include "wep.h"
+#include "wpa.h"
+#include "wme.h"
+#include "rate.h"
+
+/* misc utils */
+
+static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
+				 struct sk_buff *skb, int group_addr,
+				 int next_frag_len)
+{
+	int rate, mrate, erp, dur, i;
+	struct ieee80211_rate *txrate;
+	struct ieee80211_local *local = tx->local;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_hdr *hdr;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+	/* assume HW handles this */
+	if (tx->rate.flags & IEEE80211_TX_RC_MCS)
+		return 0;
+
+	/* uh huh? */
+	if (WARN_ON_ONCE(tx->rate.idx < 0))
+		return 0;
+
+	sband = local->hw.wiphy->bands[info->band];
+	txrate = &sband->bitrates[tx->rate.idx];
+
+	erp = txrate->flags & IEEE80211_RATE_ERP_G;
+
+	/*
+	 * data and mgmt (except PS Poll):
+	 * - during CFP: 32768
+	 * - during contention period:
+	 *   if addr1 is group address: 0
+	 *   if more fragments = 0 and addr1 is individual address: time to
+	 *      transmit one ACK plus SIFS
+	 *   if more fragments = 1 and addr1 is individual address: time to
+	 *      transmit next fragment plus 2 x ACK plus 3 x SIFS
+	 *
+	 * IEEE 802.11, 9.6:
+	 * - control response frame (CTS or ACK) shall be transmitted using the
+	 *   same rate as the immediately previous frame in the frame exchange
+	 *   sequence, if this rate belongs to the PHY mandatory rates, or else
+	 *   at the highest possible rate belonging to the PHY rates in the
+	 *   BSSBasicRateSet
+	 */
+	hdr = (struct ieee80211_hdr *)skb->data;
+	if (ieee80211_is_ctl(hdr->frame_control)) {
+		/* TODO: These control frames are not currently sent by
+		 * mac80211, but should they be implemented, this function
+		 * needs to be updated to support duration field calculation.
+		 *
+		 * RTS: time needed to transmit pending data/mgmt frame plus
+		 *    one CTS frame plus one ACK frame plus 3 x SIFS
+		 * CTS: duration of immediately previous RTS minus time
+		 *    required to transmit CTS and its SIFS
+		 * ACK: 0 if immediately previous directed data/mgmt had
+		 *    more=0, with more=1 duration in ACK frame is duration
+		 *    from previous frame minus time needed to transmit ACK
+		 *    and its SIFS
+		 * PS Poll: BIT(15) | BIT(14) | aid
+		 */
+		return 0;
+	}
+
+	/* data/mgmt */
+	if (0 /* FIX: data/mgmt during CFP */)
+		return cpu_to_le16(32768);
+
+	if (group_addr) /* Group address as the destination - no ACK */
+		return 0;
+
+	/* Individual destination address:
+	 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
+	 * CTS and ACK frames shall be transmitted using the highest rate in
+	 * basic rate set that is less than or equal to the rate of the
+	 * immediately previous frame and that is using the same modulation
+	 * (CCK or OFDM). If no basic rate set matches with these requirements,
+	 * the highest mandatory rate of the PHY that is less than or equal to
+	 * the rate of the previous frame is used.
+	 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
+	 */
+	rate = -1;
+	/* use lowest available if everything fails */
+	mrate = sband->bitrates[0].bitrate;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		struct ieee80211_rate *r = &sband->bitrates[i];
+
+		if (r->bitrate > txrate->bitrate)
+			break;
+
+		if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
+			rate = r->bitrate;
+
+		switch (sband->band) {
+		case IEEE80211_BAND_2GHZ: {
+			u32 flag;
+			if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
+				flag = IEEE80211_RATE_MANDATORY_G;
+			else
+				flag = IEEE80211_RATE_MANDATORY_B;
+			if (r->flags & flag)
+				mrate = r->bitrate;
+			break;
+		}
+		case IEEE80211_BAND_5GHZ:
+			if (r->flags & IEEE80211_RATE_MANDATORY_A)
+				mrate = r->bitrate;
+			break;
+		case IEEE80211_BAND_60GHZ:
+			/* TODO, for now fall through */
+		case IEEE80211_NUM_BANDS:
+			WARN_ON(1);
+			break;
+		}
+	}
+	if (rate == -1) {
+		/* No matching basic rate found; use highest suitable mandatory
+		 * PHY rate */
+		rate = mrate;
+	}
+
+	/* Don't calculate ACKs for QoS Frames with NoAck Policy set */
+	if (ieee80211_is_data_qos(hdr->frame_control) &&
+	    *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
+		dur = 0;
+	else
+		/* Time needed to transmit ACK
+		 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
+		 * to closest integer */
+		dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
+				tx->sdata->vif.bss_conf.use_short_preamble);
+
+	if (next_frag_len) {
+		/* Frame is fragmented: duration increases with time needed to
+		 * transmit next fragment plus ACK and 2 x SIFS. */
+		dur *= 2; /* ACK + SIFS */
+		/* next fragment */
+		dur += ieee80211_frame_duration(sband->band, next_frag_len,
+				txrate->bitrate, erp,
+				tx->sdata->vif.bss_conf.use_short_preamble);
+	}
+
+	return cpu_to_le16(dur);
+}
+
+/* tx handlers */
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
+{
+	struct ieee80211_local *local = tx->local;
+	struct ieee80211_if_managed *ifmgd;
+
+	/* driver doesn't support power save */
+	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
+		return TX_CONTINUE;
+
+	/* hardware does dynamic power save */
+	if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
+		return TX_CONTINUE;
+
+	/* dynamic power save disabled */
+	if (local->hw.conf.dynamic_ps_timeout <= 0)
+		return TX_CONTINUE;
+
+	/* we are scanning, don't enable power save */
+	if (local->scanning)
+		return TX_CONTINUE;
+
+	if (!local->ps_sdata)
+		return TX_CONTINUE;
+
+	/* No point if we're going to suspend */
+	if (local->quiescing)
+		return TX_CONTINUE;
+
+	/* dynamic ps is supported only in managed mode */
+	if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
+		return TX_CONTINUE;
+
+	ifmgd = &tx->sdata->u.mgd;
+
+	/*
+	 * Don't wakeup from power save if u-apsd is enabled, voip ac has
+	 * u-apsd enabled and the frame is in voip class. This effectively
+	 * means that even if all access categories have u-apsd enabled, in
+	 * practise u-apsd is only used with the voip ac. This is a
+	 * workaround for the case when received voip class packets do not
+	 * have correct qos tag for some reason, due the network or the
+	 * peer application.
+	 *
+	 * Note: ifmgd->uapsd_queues access is racy here. If the value is
+	 * changed via debugfs, user needs to reassociate manually to have
+	 * everything in sync.
+	 */
+	if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
+	    (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
+	    skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
+		return TX_CONTINUE;
+
+	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+		ieee80211_stop_queues_by_reason(&local->hw,
+						IEEE80211_MAX_QUEUE_MAP,
+						IEEE80211_QUEUE_STOP_REASON_PS);
+		ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
+		ieee80211_queue_work(&local->hw,
+				     &local->dynamic_ps_disable_work);
+	}
+
+	/* Don't restart the timer if we're not disassociated */
+	if (!ifmgd->associated)
+		return TX_CONTINUE;
+
+	mod_timer(&local->dynamic_ps_timer, jiffies +
+		  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
+
+	return TX_CONTINUE;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
+{
+
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+	bool assoc = false;
+
+	if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
+		return TX_CONTINUE;
+
+	if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
+	    test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
+	    !ieee80211_is_probe_req(hdr->frame_control) &&
+	    !ieee80211_is_nullfunc(hdr->frame_control))
+		/*
+		 * When software scanning only nullfunc frames (to notify
+		 * the sleep state to the AP) and probe requests (for the
+		 * active scan) are allowed, all other frames should not be
+		 * sent and we should not get here, but if we do
+		 * nonetheless, drop them to avoid sending them
+		 * off-channel. See the link below and
+		 * ieee80211_start_scan() for more.
+		 *
+		 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
+		 */
+		return TX_DROP;
+
+	if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
+		return TX_CONTINUE;
+
+	if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
+		return TX_CONTINUE;
+
+	if (tx->flags & IEEE80211_TX_PS_BUFFERED)
+		return TX_CONTINUE;
+
+	if (tx->sta)
+		assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
+
+	if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
+		if (unlikely(!assoc &&
+			     ieee80211_is_data(hdr->frame_control))) {
+#ifdef CPTCFG_MAC80211_VERBOSE_DEBUG
+			sdata_info(tx->sdata,
+				   "dropped data frame to not associated station %pM\n",
+				   hdr->addr1);
+#endif
+			I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
+			return TX_DROP;
+		}
+	} else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
+			    ieee80211_is_data(hdr->frame_control) &&
+			    !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
+		/*
+		 * No associated STAs - no need to send multicast
+		 * frames.
+		 */
+		return TX_DROP;
+	}
+
+	return TX_CONTINUE;
+}
+
+/* This function is called whenever the AP is about to exceed the maximum limit
+ * of buffered frames for power saving STAs. This situation should not really
+ * happen often during normal operation, so dropping the oldest buffered packet
+ * from each queue should be OK to make some room for new frames. */
+static void purge_old_ps_buffers(struct ieee80211_local *local)
+{
+	int total = 0, purged = 0;
+	struct sk_buff *skb;
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		struct ps_data *ps;
+
+		if (sdata->vif.type == NL80211_IFTYPE_AP)
+			ps = &sdata->u.ap.ps;
+		else if (ieee80211_vif_is_mesh(&sdata->vif))
+			ps = &sdata->u.mesh.ps;
+		else
+			continue;
+
+		skb = skb_dequeue(&ps->bc_buf);
+		if (skb) {
+			purged++;
+			dev_kfree_skb(skb);
+		}
+		total += skb_queue_len(&ps->bc_buf);
+	}
+
+	/*
+	 * Drop one frame from each station from the lowest-priority
+	 * AC that has frames at all.
+	 */
+	list_for_each_entry_rcu(sta, &local->sta_list, list) {
+		int ac;
+
+		for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
+			skb = skb_dequeue(&sta->ps_tx_buf[ac]);
+			total += skb_queue_len(&sta->ps_tx_buf[ac]);
+			if (skb) {
+				purged++;
+				ieee80211_free_txskb(&local->hw, skb);
+				break;
+			}
+		}
+	}
+
+	local->total_ps_buffered = total;
+	ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
+}
+
+static ieee80211_tx_result
+ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+	struct ps_data *ps;
+
+	/*
+	 * broadcast/multicast frame
+	 *
+	 * If any of the associated/peer stations is in power save mode,
+	 * the frame is buffered to be sent after DTIM beacon frame.
+	 * This is done either by the hardware or us.
+	 */
+
+	/* powersaving STAs currently only in AP/VLAN/mesh mode */
+	if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
+	    tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		if (!tx->sdata->bss)
+			return TX_CONTINUE;
+
+		ps = &tx->sdata->bss->ps;
+	} else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
+		ps = &tx->sdata->u.mesh.ps;
+	} else {
+		return TX_CONTINUE;
+	}
+
+
+	/* no buffering for ordered frames */
+	if (ieee80211_has_order(hdr->frame_control))
+		return TX_CONTINUE;
+
+	/* no stations in PS mode */
+	if (!atomic_read(&ps->num_sta_ps))
+		return TX_CONTINUE;
+
+	info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
+	if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
+		info->hw_queue = tx->sdata->vif.cab_queue;
+
+	/* device releases frame after DTIM beacon */
+	if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING))
+		return TX_CONTINUE;
+
+	/* buffered in mac80211 */
+	if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
+		purge_old_ps_buffers(tx->local);
+
+	if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
+		ps_dbg(tx->sdata,
+		       "BC TX buffer full - dropping the oldest frame\n");
+		dev_kfree_skb(skb_dequeue(&ps->bc_buf));
+	} else
+		tx->local->total_ps_buffered++;
+
+	skb_queue_tail(&ps->bc_buf, tx->skb);
+
+	return TX_QUEUED;
+}
+
+static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
+			     struct sk_buff *skb)
+{
+	if (!ieee80211_is_mgmt(fc))
+		return 0;
+
+	if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
+		return 0;
+
+	if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *)
+					    skb->data))
+		return 0;
+
+	return 1;
+}
+
+static ieee80211_tx_result
+ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
+{
+	struct sta_info *sta = tx->sta;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+	struct ieee80211_local *local = tx->local;
+
+	if (unlikely(!sta))
+		return TX_CONTINUE;
+
+	if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
+		      test_sta_flag(sta, WLAN_STA_PS_DRIVER)) &&
+		     !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
+		int ac = skb_get_queue_mapping(tx->skb);
+
+		/* only deauth, disassoc and action are bufferable MMPDUs */
+		if (ieee80211_is_mgmt(hdr->frame_control) &&
+		    !ieee80211_is_deauth(hdr->frame_control) &&
+		    !ieee80211_is_disassoc(hdr->frame_control) &&
+		    !ieee80211_is_action(hdr->frame_control)) {
+			info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
+			return TX_CONTINUE;
+		}
+
+		ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
+		       sta->sta.addr, sta->sta.aid, ac);
+		if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
+			purge_old_ps_buffers(tx->local);
+		if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
+			struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
+			ps_dbg(tx->sdata,
+			       "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
+			       sta->sta.addr, ac);
+			ieee80211_free_txskb(&local->hw, old);
+		} else
+			tx->local->total_ps_buffered++;
+
+		info->control.jiffies = jiffies;
+		info->control.vif = &tx->sdata->vif;
+		info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+		skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
+
+		if (!timer_pending(&local->sta_cleanup))
+			mod_timer(&local->sta_cleanup,
+				  round_jiffies(jiffies +
+						STA_INFO_CLEANUP_INTERVAL));
+
+		/*
+		 * We queued up some frames, so the TIM bit might
+		 * need to be set, recalculate it.
+		 */
+		sta_info_recalc_tim(sta);
+
+		return TX_QUEUED;
+	} else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
+		ps_dbg(tx->sdata,
+		       "STA %pM in PS mode, but polling/in SP -> send frame\n",
+		       sta->sta.addr);
+	}
+
+	return TX_CONTINUE;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
+{
+	if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
+		return TX_CONTINUE;
+
+	if (tx->flags & IEEE80211_TX_UNICAST)
+		return ieee80211_tx_h_unicast_ps_buf(tx);
+	else
+		return ieee80211_tx_h_multicast_ps_buf(tx);
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+
+	if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol &&
+		     tx->sdata->control_port_no_encrypt))
+		info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+
+	return TX_CONTINUE;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
+{
+	struct ieee80211_key *key;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+
+	if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
+		tx->key = NULL;
+	else if (tx->sta && (key = rcu_dereference(tx->sta->ptk)))
+		tx->key = key;
+	else if (ieee80211_is_mgmt(hdr->frame_control) &&
+		 is_multicast_ether_addr(hdr->addr1) &&
+		 ieee80211_is_robust_mgmt_frame(hdr) &&
+		 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
+		tx->key = key;
+	else if (is_multicast_ether_addr(hdr->addr1) &&
+		 (key = rcu_dereference(tx->sdata->default_multicast_key)))
+		tx->key = key;
+	else if (!is_multicast_ether_addr(hdr->addr1) &&
+		 (key = rcu_dereference(tx->sdata->default_unicast_key)))
+		tx->key = key;
+	else if (info->flags & IEEE80211_TX_CTL_INJECTED)
+		tx->key = NULL;
+	else if (!tx->sdata->drop_unencrypted)
+		tx->key = NULL;
+	else if (tx->skb->protocol == tx->sdata->control_port_protocol)
+		tx->key = NULL;
+	else if (ieee80211_is_robust_mgmt_frame(hdr) &&
+		 !(ieee80211_is_action(hdr->frame_control) &&
+		   tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP)))
+		tx->key = NULL;
+	else if (ieee80211_is_mgmt(hdr->frame_control) &&
+		 !ieee80211_is_robust_mgmt_frame(hdr))
+		tx->key = NULL;
+	else {
+		I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
+		return TX_DROP;
+	}
+
+	if (tx->key) {
+		bool skip_hw = false;
+
+		tx->key->tx_rx_count++;
+		/* TODO: add threshold stuff again */
+
+		switch (tx->key->conf.cipher) {
+		case WLAN_CIPHER_SUITE_WEP40:
+		case WLAN_CIPHER_SUITE_WEP104:
+		case WLAN_CIPHER_SUITE_TKIP:
+			if (!ieee80211_is_data_present(hdr->frame_control))
+				tx->key = NULL;
+			break;
+		case WLAN_CIPHER_SUITE_CCMP:
+			if (!ieee80211_is_data_present(hdr->frame_control) &&
+			    !ieee80211_use_mfp(hdr->frame_control, tx->sta,
+					       tx->skb))
+				tx->key = NULL;
+			else
+				skip_hw = (tx->key->conf.flags &
+					   IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
+					ieee80211_is_mgmt(hdr->frame_control);
+			break;
+		case WLAN_CIPHER_SUITE_AES_CMAC:
+			if (!ieee80211_is_mgmt(hdr->frame_control))
+				tx->key = NULL;
+			break;
+		}
+
+		if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
+			     !ieee80211_is_deauth(hdr->frame_control)))
+			return TX_DROP;
+
+		if (!skip_hw && tx->key &&
+		    tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
+			info->control.hw_key = &tx->key->conf;
+	}
+
+	return TX_CONTINUE;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+	struct ieee80211_hdr *hdr = (void *)tx->skb->data;
+	struct ieee80211_supported_band *sband;
+	u32 len;
+	struct ieee80211_tx_rate_control txrc;
+	struct ieee80211_sta_rates *ratetbl = NULL;
+	bool assoc = false;
+
+	memset(&txrc, 0, sizeof(txrc));
+
+	sband = tx->local->hw.wiphy->bands[info->band];
+
+	len = min_t(u32, tx->skb->len + FCS_LEN,
+			 tx->local->hw.wiphy->frag_threshold);
+
+	/* set up the tx rate control struct we give the RC algo */
+	txrc.hw = &tx->local->hw;
+	txrc.sband = sband;
+	txrc.bss_conf = &tx->sdata->vif.bss_conf;
+	txrc.skb = tx->skb;
+	txrc.reported_rate.idx = -1;
+	txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
+	if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
+		txrc.max_rate_idx = -1;
+	else
+		txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
+
+	if (tx->sdata->rc_has_mcs_mask[info->band])
+		txrc.rate_idx_mcs_mask =
+			tx->sdata->rc_rateidx_mcs_mask[info->band];
+
+	txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
+		    tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
+		    tx->sdata->vif.type == NL80211_IFTYPE_ADHOC);
+
+	/* set up RTS protection if desired */
+	if (len > tx->local->hw.wiphy->rts_threshold) {
+		txrc.rts = true;
+	}
+
+	info->control.use_rts = txrc.rts;
+	info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
+
+	/*
+	 * Use short preamble if the BSS can handle it, but not for
+	 * management frames unless we know the receiver can handle
+	 * that -- the management frame might be to a station that
+	 * just wants a probe response.
+	 */
+	if (tx->sdata->vif.bss_conf.use_short_preamble &&
+	    (ieee80211_is_data(hdr->frame_control) ||
+	     (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
+		txrc.short_preamble = true;
+
+	info->control.short_preamble = txrc.short_preamble;
+
+	if (tx->sta)
+		assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
+
+	/*
+	 * Lets not bother rate control if we're associated and cannot
+	 * talk to the sta. This should not happen.
+	 */
+	if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
+		 !rate_usable_index_exists(sband, &tx->sta->sta),
+		 "%s: Dropped data frame as no usable bitrate found while "
+		 "scanning and associated. Target station: "
+		 "%pM on %d GHz band\n",
+		 tx->sdata->name, hdr->addr1,
+		 info->band ? 5 : 2))
+		return TX_DROP;
+
+	/*
+	 * If we're associated with the sta at this point we know we can at
+	 * least send the frame at the lowest bit rate.
+	 */
+	rate_control_get_rate(tx->sdata, tx->sta, &txrc);
+
+	if (tx->sta && !info->control.skip_table)
+		ratetbl = rcu_dereference(tx->sta->sta.rates);
+
+	if (unlikely(info->control.rates[0].idx < 0)) {
+		if (ratetbl) {
+			struct ieee80211_tx_rate rate = {
+				.idx = ratetbl->rate[0].idx,
+				.flags = ratetbl->rate[0].flags,
+				.count = ratetbl->rate[0].count
+			};
+
+			if (ratetbl->rate[0].idx < 0)
+				return TX_DROP;
+
+			tx->rate = rate;
+		} else {
+			return TX_DROP;
+		}
+	} else {
+		tx->rate = info->control.rates[0];
+	}
+
+	if (txrc.reported_rate.idx < 0) {
+		txrc.reported_rate = tx->rate;
+		if (tx->sta && ieee80211_is_data(hdr->frame_control))
+			tx->sta->last_tx_rate = txrc.reported_rate;
+	} else if (tx->sta)
+		tx->sta->last_tx_rate = txrc.reported_rate;
+
+	if (ratetbl)
+		return TX_CONTINUE;
+
+	if (unlikely(!info->control.rates[0].count))
+		info->control.rates[0].count = 1;
+
+	if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
+			 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
+		info->control.rates[0].count = 1;
+
+	return TX_CONTINUE;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+	u16 *seq;
+	u8 *qc;
+	int tid;
+
+	/*
+	 * Packet injection may want to control the sequence
+	 * number, if we have no matching interface then we
+	 * neither assign one ourselves nor ask the driver to.
+	 */
+	if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
+		return TX_CONTINUE;
+
+	if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
+		return TX_CONTINUE;
+
+	if (ieee80211_hdrlen(hdr->frame_control) < 24)
+		return TX_CONTINUE;
+
+	if (ieee80211_is_qos_nullfunc(hdr->frame_control))
+		return TX_CONTINUE;
+
+	/*
+	 * Anything but QoS data that has a sequence number field
+	 * (is long enough) gets a sequence number from the global
+	 * counter.
+	 */
+	if (!ieee80211_is_data_qos(hdr->frame_control)) {
+		/* driver should assign sequence number */
+		info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
+		/* for pure STA mode without beacons, we can do it */
+		hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
+		tx->sdata->sequence_number += 0x10;
+		return TX_CONTINUE;
+	}
+
+	/*
+	 * This should be true for injected/management frames only, for
+	 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
+	 * above since they are not QoS-data frames.
+	 */
+	if (!tx->sta)
+		return TX_CONTINUE;
+
+	/* include per-STA, per-TID sequence counter */
+
+	qc = ieee80211_get_qos_ctl(hdr);
+	tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
+	seq = &tx->sta->tid_seq[tid];
+
+	hdr->seq_ctrl = cpu_to_le16(*seq);
+
+	/* Increase the sequence number. */
+	*seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
+
+	return TX_CONTINUE;
+}
+
+static int ieee80211_fragment(struct ieee80211_tx_data *tx,
+			      struct sk_buff *skb, int hdrlen,
+			      int frag_threshold)
+{
+	struct ieee80211_local *local = tx->local;
+	struct ieee80211_tx_info *info;
+	struct sk_buff *tmp;
+	int per_fragm = frag_threshold - hdrlen - FCS_LEN;
+	int pos = hdrlen + per_fragm;
+	int rem = skb->len - hdrlen - per_fragm;
+
+	if (WARN_ON(rem < 0))
+		return -EINVAL;
+
+	/* first fragment was already added to queue by caller */
+
+	while (rem) {
+		int fraglen = per_fragm;
+
+		if (fraglen > rem)
+			fraglen = rem;
+		rem -= fraglen;
+		tmp = dev_alloc_skb(local->tx_headroom +
+				    frag_threshold +
+				    IEEE80211_ENCRYPT_HEADROOM +
+				    IEEE80211_ENCRYPT_TAILROOM);
+		if (!tmp)
+			return -ENOMEM;
+
+		__skb_queue_tail(&tx->skbs, tmp);
+
+		skb_reserve(tmp, local->tx_headroom +
+				 IEEE80211_ENCRYPT_HEADROOM);
+		/* copy control information */
+		memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
+
+		info = IEEE80211_SKB_CB(tmp);
+		info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
+				 IEEE80211_TX_CTL_FIRST_FRAGMENT);
+
+		if (rem)
+			info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
+
+		skb_copy_queue_mapping(tmp, skb);
+		tmp->priority = skb->priority;
+		tmp->dev = skb->dev;
+
+		/* copy header and data */
+		memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
+		memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
+
+		pos += fraglen;
+	}
+
+	/* adjust first fragment's length */
+	skb->len = hdrlen + per_fragm;
+	return 0;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb = tx->skb;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (void *)skb->data;
+	int frag_threshold = tx->local->hw.wiphy->frag_threshold;
+	int hdrlen;
+	int fragnum;
+
+	/* no matter what happens, tx->skb moves to tx->skbs */
+	__skb_queue_tail(&tx->skbs, skb);
+	tx->skb = NULL;
+
+	if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
+		return TX_CONTINUE;
+
+	if (tx->local->ops->set_frag_threshold)
+		return TX_CONTINUE;
+
+	/*
+	 * Warn when submitting a fragmented A-MPDU frame and drop it.
+	 * This scenario is handled in ieee80211_tx_prepare but extra
+	 * caution taken here as fragmented ampdu may cause Tx stop.
+	 */
+	if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
+		return TX_DROP;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+	/* internal error, why isn't DONTFRAG set? */
+	if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
+		return TX_DROP;
+
+	/*
+	 * Now fragment the frame. This will allocate all the fragments and
+	 * chain them (using skb as the first fragment) to skb->next.
+	 * During transmission, we will remove the successfully transmitted
+	 * fragments from this list. When the low-level driver rejects one
+	 * of the fragments then we will simply pretend to accept the skb
+	 * but store it away as pending.
+	 */
+	if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
+		return TX_DROP;
+
+	/* update duration/seq/flags of fragments */
+	fragnum = 0;
+
+	skb_queue_walk(&tx->skbs, skb) {
+		const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
+
+		hdr = (void *)skb->data;
+		info = IEEE80211_SKB_CB(skb);
+
+		if (!skb_queue_is_last(&tx->skbs, skb)) {
+			hdr->frame_control |= morefrags;
+			/*
+			 * No multi-rate retries for fragmented frames, that
+			 * would completely throw off the NAV at other STAs.
+			 */
+			info->control.rates[1].idx = -1;
+			info->control.rates[2].idx = -1;
+			info->control.rates[3].idx = -1;
+			BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
+			info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+		} else {
+			hdr->frame_control &= ~morefrags;
+		}
+		hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
+		fragnum++;
+	}
+
+	return TX_CONTINUE;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+	int ac = -1;
+
+	if (!tx->sta)
+		return TX_CONTINUE;
+
+	skb_queue_walk(&tx->skbs, skb) {
+		ac = skb_get_queue_mapping(skb);
+		tx->sta->tx_fragments++;
+		tx->sta->tx_bytes[ac] += skb->len;
+	}
+	if (ac >= 0)
+		tx->sta->tx_packets[ac]++;
+
+	return TX_CONTINUE;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
+{
+	if (!tx->key)
+		return TX_CONTINUE;
+
+	switch (tx->key->conf.cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		return ieee80211_crypto_wep_encrypt(tx);
+	case WLAN_CIPHER_SUITE_TKIP:
+		return ieee80211_crypto_tkip_encrypt(tx);
+	case WLAN_CIPHER_SUITE_CCMP:
+		return ieee80211_crypto_ccmp_encrypt(tx);
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		return ieee80211_crypto_aes_cmac_encrypt(tx);
+	default:
+		return ieee80211_crypto_hw_encrypt(tx);
+	}
+
+	return TX_DROP;
+}
+
+static ieee80211_tx_result debug_noinline
+ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+	struct ieee80211_hdr *hdr;
+	int next_len;
+	bool group_addr;
+
+	skb_queue_walk(&tx->skbs, skb) {
+		hdr = (void *) skb->data;
+		if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
+			break; /* must not overwrite AID */
+		if (!skb_queue_is_last(&tx->skbs, skb)) {
+			struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
+			next_len = next->len;
+		} else
+			next_len = 0;
+		group_addr = is_multicast_ether_addr(hdr->addr1);
+
+		hdr->duration_id =
+			ieee80211_duration(tx, skb, group_addr, next_len);
+	}
+
+	return TX_CONTINUE;
+}
+
+/* actual transmit path */
+
+static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
+				  struct sk_buff *skb,
+				  struct ieee80211_tx_info *info,
+				  struct tid_ampdu_tx *tid_tx,
+				  int tid)
+{
+	bool queued = false;
+	bool reset_agg_timer = false;
+	struct sk_buff *purge_skb = NULL;
+
+	if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
+		info->flags |= IEEE80211_TX_CTL_AMPDU;
+		reset_agg_timer = true;
+	} else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
+		/*
+		 * nothing -- this aggregation session is being started
+		 * but that might still fail with the driver
+		 */
+	} else {
+		spin_lock(&tx->sta->lock);
+		/*
+		 * Need to re-check now, because we may get here
+		 *
+		 *  1) in the window during which the setup is actually
+		 *     already done, but not marked yet because not all
+		 *     packets are spliced over to the driver pending
+		 *     queue yet -- if this happened we acquire the lock
+		 *     either before or after the splice happens, but
+		 *     need to recheck which of these cases happened.
+		 *
+		 *  2) during session teardown, if the OPERATIONAL bit
+		 *     was cleared due to the teardown but the pointer
+		 *     hasn't been assigned NULL yet (or we loaded it
+		 *     before it was assigned) -- in this case it may
+		 *     now be NULL which means we should just let the
+		 *     packet pass through because splicing the frames
+		 *     back is already done.
+		 */
+		tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
+
+		if (!tid_tx) {
+			/* do nothing, let packet pass through */
+		} else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
+			info->flags |= IEEE80211_TX_CTL_AMPDU;
+			reset_agg_timer = true;
+		} else {
+			queued = true;
+			info->control.vif = &tx->sdata->vif;
+			info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+			__skb_queue_tail(&tid_tx->pending, skb);
+			if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
+				purge_skb = __skb_dequeue(&tid_tx->pending);
+		}
+		spin_unlock(&tx->sta->lock);
+
+		if (purge_skb)
+			ieee80211_free_txskb(&tx->local->hw, purge_skb);
+	}
+
+	/* reset session timer */
+	if (reset_agg_timer && tid_tx->timeout)
+		tid_tx->last_tx = jiffies;
+
+	return queued;
+}
+
+/*
+ * initialises @tx
+ */
+static ieee80211_tx_result
+ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
+		     struct ieee80211_tx_data *tx,
+		     struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_hdr *hdr;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int tid;
+	u8 *qc;
+
+	memset(tx, 0, sizeof(*tx));
+	tx->skb = skb;
+	tx->local = local;
+	tx->sdata = sdata;
+	__skb_queue_head_init(&tx->skbs);
+
+	/*
+	 * If this flag is set to true anywhere, and we get here,
+	 * we are doing the needed processing, so remove the flag
+	 * now.
+	 */
+	info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		tx->sta = rcu_dereference(sdata->u.vlan.sta);
+		if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
+			return TX_DROP;
+	} else if (info->flags & (IEEE80211_TX_CTL_INJECTED |
+				  IEEE80211_TX_INTFL_NL80211_FRAME_TX) ||
+		   tx->sdata->control_port_protocol == tx->skb->protocol) {
+		tx->sta = sta_info_get_bss(sdata, hdr->addr1);
+	}
+	if (!tx->sta)
+		tx->sta = sta_info_get(sdata, hdr->addr1);
+
+	if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
+	    !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
+	    (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) &&
+	    !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) {
+		struct tid_ampdu_tx *tid_tx;
+
+		qc = ieee80211_get_qos_ctl(hdr);
+		tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
+
+		tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
+		if (tid_tx) {
+			bool queued;
+
+			queued = ieee80211_tx_prep_agg(tx, skb, info,
+						       tid_tx, tid);
+
+			if (unlikely(queued))
+				return TX_QUEUED;
+		}
+	}
+
+	if (is_multicast_ether_addr(hdr->addr1)) {
+		tx->flags &= ~IEEE80211_TX_UNICAST;
+		info->flags |= IEEE80211_TX_CTL_NO_ACK;
+	} else
+		tx->flags |= IEEE80211_TX_UNICAST;
+
+	if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
+		if (!(tx->flags & IEEE80211_TX_UNICAST) ||
+		    skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
+		    info->flags & IEEE80211_TX_CTL_AMPDU)
+			info->flags |= IEEE80211_TX_CTL_DONTFRAG;
+	}
+
+	if (!tx->sta)
+		info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+	else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT))
+		info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+
+	info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
+
+	return TX_CONTINUE;
+}
+
+static bool ieee80211_tx_frags(struct ieee80211_local *local,
+			       struct ieee80211_vif *vif,
+			       struct ieee80211_sta *sta,
+			       struct sk_buff_head *skbs,
+			       bool txpending)
+{
+	struct ieee80211_tx_control control;
+	struct sk_buff *skb, *tmp;
+	unsigned long flags;
+
+	skb_queue_walk_safe(skbs, skb, tmp) {
+		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+		int q = info->hw_queue;
+
+#ifdef CPTCFG_MAC80211_VERBOSE_DEBUG
+		if (WARN_ON_ONCE(q >= local->hw.queues)) {
+			__skb_unlink(skb, skbs);
+			ieee80211_free_txskb(&local->hw, skb);
+			continue;
+		}
+#endif
+
+		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+		if (local->queue_stop_reasons[q] ||
+		    (!txpending && !skb_queue_empty(&local->pending[q]))) {
+			if (unlikely(info->flags &
+				     IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
+				if (local->queue_stop_reasons[q] &
+				    ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
+					/*
+					 * Drop off-channel frames if queues
+					 * are stopped for any reason other
+					 * than off-channel operation. Never
+					 * queue them.
+					 */
+					spin_unlock_irqrestore(
+						&local->queue_stop_reason_lock,
+						flags);
+					ieee80211_purge_tx_queue(&local->hw,
+								 skbs);
+					return true;
+				}
+			} else {
+
+				/*
+				 * Since queue is stopped, queue up frames for
+				 * later transmission from the tx-pending
+				 * tasklet when the queue is woken again.
+				 */
+				if (txpending)
+					skb_queue_splice_init(skbs,
+							      &local->pending[q]);
+				else
+					skb_queue_splice_tail_init(skbs,
+								   &local->pending[q]);
+
+				spin_unlock_irqrestore(&local->queue_stop_reason_lock,
+						       flags);
+				return false;
+			}
+		}
+		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+		info->control.vif = vif;
+		control.sta = sta;
+
+		__skb_unlink(skb, skbs);
+		drv_tx(local, &control, skb);
+	}
+
+	return true;
+}
+
+/*
+ * Returns false if the frame couldn't be transmitted but was queued instead.
+ */
+static bool __ieee80211_tx(struct ieee80211_local *local,
+			   struct sk_buff_head *skbs, int led_len,
+			   struct sta_info *sta, bool txpending)
+{
+	struct ieee80211_tx_info *info;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_vif *vif;
+	struct ieee80211_sta *pubsta;
+	struct sk_buff *skb;
+	bool result = true;
+	__le16 fc;
+
+	if (WARN_ON(skb_queue_empty(skbs)))
+		return true;
+
+	skb = skb_peek(skbs);
+	fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
+	info = IEEE80211_SKB_CB(skb);
+	sdata = vif_to_sdata(info->control.vif);
+	if (sta && !sta->uploaded)
+		sta = NULL;
+
+	if (sta)
+		pubsta = &sta->sta;
+	else
+		pubsta = NULL;
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_MONITOR:
+		sdata = rcu_dereference(local->monitor_sdata);
+		if (sdata) {
+			vif = &sdata->vif;
+			info->hw_queue =
+				vif->hw_queue[skb_get_queue_mapping(skb)];
+		} else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
+			dev_kfree_skb(skb);
+			return true;
+		} else
+			vif = NULL;
+		break;
+	case NL80211_IFTYPE_AP_VLAN:
+		sdata = container_of(sdata->bss,
+				     struct ieee80211_sub_if_data, u.ap);
+		/* fall through */
+	default:
+		vif = &sdata->vif;
+		break;
+	}
+
+	result = ieee80211_tx_frags(local, vif, pubsta, skbs,
+				    txpending);
+
+	ieee80211_tpt_led_trig_tx(local, fc, led_len);
+	ieee80211_led_tx(local, 1);
+
+	WARN_ON_ONCE(!skb_queue_empty(skbs));
+
+	return result;
+}
+
+/*
+ * Invoke TX handlers, return 0 on success and non-zero if the
+ * frame was dropped or queued.
+ */
+static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+	ieee80211_tx_result res = TX_DROP;
+
+#define CALL_TXH(txh) \
+	do {				\
+		res = txh(tx);		\
+		if (res != TX_CONTINUE)	\
+			goto txh_done;	\
+	} while (0)
+
+	CALL_TXH(ieee80211_tx_h_dynamic_ps);
+	CALL_TXH(ieee80211_tx_h_check_assoc);
+	CALL_TXH(ieee80211_tx_h_ps_buf);
+	CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
+	CALL_TXH(ieee80211_tx_h_select_key);
+	if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
+		CALL_TXH(ieee80211_tx_h_rate_ctrl);
+
+	if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
+		__skb_queue_tail(&tx->skbs, tx->skb);
+		tx->skb = NULL;
+		goto txh_done;
+	}
+
+	CALL_TXH(ieee80211_tx_h_michael_mic_add);
+	CALL_TXH(ieee80211_tx_h_sequence);
+	CALL_TXH(ieee80211_tx_h_fragment);
+	/* handlers after fragment must be aware of tx info fragmentation! */
+	CALL_TXH(ieee80211_tx_h_stats);
+	CALL_TXH(ieee80211_tx_h_encrypt);
+	if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
+		CALL_TXH(ieee80211_tx_h_calculate_duration);
+#undef CALL_TXH
+
+ txh_done:
+	if (unlikely(res == TX_DROP)) {
+		I802_DEBUG_INC(tx->local->tx_handlers_drop);
+		if (tx->skb)
+			ieee80211_free_txskb(&tx->local->hw, tx->skb);
+		else
+			ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
+		return -1;
+	} else if (unlikely(res == TX_QUEUED)) {
+		I802_DEBUG_INC(tx->local->tx_handlers_queued);
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * Returns false if the frame couldn't be transmitted but was queued instead.
+ */
+static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
+			 struct sk_buff *skb, bool txpending,
+			 enum ieee80211_band band)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_tx_data tx;
+	ieee80211_tx_result res_prepare;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	bool result = true;
+	int led_len;
+
+	if (unlikely(skb->len < 10)) {
+		dev_kfree_skb(skb);
+		return true;
+	}
+
+	/* initialises tx */
+	led_len = skb->len;
+	res_prepare = ieee80211_tx_prepare(sdata, &tx, skb);
+
+	if (unlikely(res_prepare == TX_DROP)) {
+		ieee80211_free_txskb(&local->hw, skb);
+		return true;
+	} else if (unlikely(res_prepare == TX_QUEUED)) {
+		return true;
+	}
+
+	info->band = band;
+
+	/* set up hw_queue value early */
+	if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
+	    !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
+		info->hw_queue =
+			sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
+
+	if (!invoke_tx_handlers(&tx))
+		result = __ieee80211_tx(local, &tx.skbs, led_len,
+					tx.sta, txpending);
+
+	return result;
+}
+
+/* device xmit handlers */
+
+static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
+				struct sk_buff *skb,
+				int head_need, bool may_encrypt)
+{
+	struct ieee80211_local *local = sdata->local;
+	int tail_need = 0;
+
+	if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
+		tail_need = IEEE80211_ENCRYPT_TAILROOM;
+		tail_need -= skb_tailroom(skb);
+		tail_need = max_t(int, tail_need, 0);
+	}
+
+	if (skb_cloned(skb))
+		I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
+	else if (head_need || tail_need)
+		I802_DEBUG_INC(local->tx_expand_skb_head);
+	else
+		return 0;
+
+	if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
+		wiphy_debug(local->hw.wiphy,
+			    "failed to reallocate TX buffer\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
+		    enum ieee80211_band band)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	int headroom;
+	bool may_encrypt;
+
+	may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
+
+	headroom = local->tx_headroom;
+	if (may_encrypt)
+		headroom += IEEE80211_ENCRYPT_HEADROOM;
+	headroom -= skb_headroom(skb);
+	headroom = max_t(int, 0, headroom);
+
+	if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
+		ieee80211_free_txskb(&local->hw, skb);
+		return;
+	}
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	info->control.vif = &sdata->vif;
+
+	if (ieee80211_vif_is_mesh(&sdata->vif)) {
+		if (ieee80211_is_data(hdr->frame_control) &&
+		    is_unicast_ether_addr(hdr->addr1)) {
+			if (mesh_nexthop_resolve(sdata, skb))
+				return; /* skb queued: don't free */
+		} else {
+			ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
+		}
+	}
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27))
+	/* Older kernels do not have the select_queue callback */
+	skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, skb));
+#endif
+	ieee80211_set_qos_hdr(sdata, skb);
+	ieee80211_tx(sdata, skb, false, band);
+}
+
+static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb)
+{
+	struct ieee80211_radiotap_iterator iterator;
+	struct ieee80211_radiotap_header *rthdr =
+		(struct ieee80211_radiotap_header *) skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
+						   NULL);
+	u16 txflags;
+
+	info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
+		       IEEE80211_TX_CTL_DONTFRAG;
+
+	/*
+	 * for every radiotap entry that is present
+	 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
+	 * entries present, or -EINVAL on error)
+	 */
+
+	while (!ret) {
+		ret = ieee80211_radiotap_iterator_next(&iterator);
+
+		if (ret)
+			continue;
+
+		/* see if this argument is something we can use */
+		switch (iterator.this_arg_index) {
+		/*
+		 * You must take care when dereferencing iterator.this_arg
+		 * for multibyte types... the pointer is not aligned.  Use
+		 * get_unaligned((type *)iterator.this_arg) to dereference
+		 * iterator.this_arg for type "type" safely on all arches.
+		*/
+		case IEEE80211_RADIOTAP_FLAGS:
+			if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
+				/*
+				 * this indicates that the skb we have been
+				 * handed has the 32-bit FCS CRC at the end...
+				 * we should react to that by snipping it off
+				 * because it will be recomputed and added
+				 * on transmission
+				 */
+				if (skb->len < (iterator._max_length + FCS_LEN))
+					return false;
+
+				skb_trim(skb, skb->len - FCS_LEN);
+			}
+			if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
+				info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
+			if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
+				info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
+			break;
+
+		case IEEE80211_RADIOTAP_TX_FLAGS:
+			txflags = get_unaligned_le16(iterator.this_arg);
+			if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
+				info->flags |= IEEE80211_TX_CTL_NO_ACK;
+			break;
+
+		/*
+		 * Please update the file
+		 * Documentation/networking/mac80211-injection.txt
+		 * when parsing new fields here.
+		 */
+
+		default:
+			break;
+		}
+	}
+
+	if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
+		return false;
+
+	/*
+	 * remove the radiotap header
+	 * iterator->_max_length was sanity-checked against
+	 * skb->len by iterator init
+	 */
+	skb_pull(skb, iterator._max_length);
+
+	return true;
+}
+
+netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
+					 struct net_device *dev)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *chan;
+	struct ieee80211_radiotap_header *prthdr =
+		(struct ieee80211_radiotap_header *)skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr;
+	struct ieee80211_sub_if_data *tmp_sdata, *sdata;
+	u16 len_rthdr;
+	int hdrlen;
+
+	/* check for not even having the fixed radiotap header part */
+	if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
+		goto fail; /* too short to be possibly valid */
+
+	/* is it a header version we can trust to find length from? */
+	if (unlikely(prthdr->it_version))
+		goto fail; /* only version 0 is supported */
+
+	/* then there must be a radiotap header with a length we can use */
+	len_rthdr = ieee80211_get_radiotap_len(skb->data);
+
+	/* does the skb contain enough to deliver on the alleged length? */
+	if (unlikely(skb->len < len_rthdr))
+		goto fail; /* skb too short for claimed rt header extent */
+
+	/*
+	 * fix up the pointers accounting for the radiotap
+	 * header still being in there.  We are being given
+	 * a precooked IEEE80211 header so no need for
+	 * normal processing
+	 */
+	skb_set_mac_header(skb, len_rthdr);
+	/*
+	 * these are just fixed to the end of the rt area since we
+	 * don't have any better information and at this point, nobody cares
+	 */
+	skb_set_network_header(skb, len_rthdr);
+	skb_set_transport_header(skb, len_rthdr);
+
+	if (skb->len < len_rthdr + 2)
+		goto fail;
+
+	hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+	if (skb->len < len_rthdr + hdrlen)
+		goto fail;
+
+	/*
+	 * Initialize skb->protocol if the injected frame is a data frame
+	 * carrying a rfc1042 header
+	 */
+	if (ieee80211_is_data(hdr->frame_control) &&
+	    skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
+		u8 *payload = (u8 *)hdr + hdrlen;
+
+		if (ether_addr_equal(payload, rfc1042_header))
+			skb->protocol = cpu_to_be16((payload[6] << 8) |
+						    payload[7]);
+	}
+
+	memset(info, 0, sizeof(*info));
+
+	info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
+		      IEEE80211_TX_CTL_INJECTED;
+
+	/* process and remove the injection radiotap header */
+	if (!ieee80211_parse_tx_radiotap(skb))
+		goto fail;
+
+	rcu_read_lock();
+
+	/*
+	 * We process outgoing injected frames that have a local address
+	 * we handle as though they are non-injected frames.
+	 * This code here isn't entirely correct, the local MAC address
+	 * isn't always enough to find the interface to use; for proper
+	 * VLAN/WDS support we will need a different mechanism (which
+	 * likely isn't going to be monitor interfaces).
+	 */
+	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(tmp_sdata))
+			continue;
+		if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
+		    tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+		    tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
+			continue;
+		if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
+			sdata = tmp_sdata;
+			break;
+		}
+	}
+
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!chanctx_conf) {
+		tmp_sdata = rcu_dereference(local->monitor_sdata);
+		if (tmp_sdata)
+			chanctx_conf =
+				rcu_dereference(tmp_sdata->vif.chanctx_conf);
+	}
+
+	if (chanctx_conf)
+		chan = chanctx_conf->def.chan;
+	else if (!local->use_chanctx)
+		chan = local->_oper_chandef.chan;
+	else
+		goto fail_rcu;
+
+	/*
+	 * Frame injection is not allowed if beaconing is not allowed
+	 * or if we need radar detection. Beaconing is usually not allowed when
+	 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
+	 * Passive scan is also used in world regulatory domains where
+	 * your country is not known and as such it should be treated as
+	 * NO TX unless the channel is explicitly allowed in which case
+	 * your current regulatory domain would not have the passive scan
+	 * flag.
+	 *
+	 * Since AP mode uses monitor interfaces to inject/TX management
+	 * frames we can make AP mode the exception to this rule once it
+	 * supports radar detection as its implementation can deal with
+	 * radar detection by itself. We can do that later by adding a
+	 * monitor flag interfaces used for AP support.
+	 */
+	if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR |
+			    IEEE80211_CHAN_PASSIVE_SCAN)))
+		goto fail_rcu;
+
+	ieee80211_xmit(sdata, skb, chan->band);
+	rcu_read_unlock();
+
+	return NETDEV_TX_OK;
+
+fail_rcu:
+	rcu_read_unlock();
+fail:
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK; /* meaning, we dealt with the skb */
+}
+
+/**
+ * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
+ * subinterfaces (wlan#, WDS, and VLAN interfaces)
+ * @skb: packet to be sent
+ * @dev: incoming interface
+ *
+ * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
+ * not be freed, and caller is responsible for either retrying later or freeing
+ * skb).
+ *
+ * This function takes in an Ethernet header and encapsulates it with suitable
+ * IEEE 802.11 header based on which interface the packet is coming in. The
+ * encapsulated packet will then be passed to master interface, wlan#.11, for
+ * transmission (through low-level driver).
+ */
+netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
+				    struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_tx_info *info;
+	int head_need;
+	u16 ethertype, hdrlen,  meshhdrlen = 0;
+	__le16 fc;
+	struct ieee80211_hdr hdr;
+	struct ieee80211s_hdr mesh_hdr __maybe_unused;
+	struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
+	const u8 *encaps_data;
+	int encaps_len, skip_header_bytes;
+	int nh_pos, h_pos;
+	struct sta_info *sta = NULL;
+	bool wme_sta = false, authorized = false, tdls_auth = false;
+	bool tdls_direct = false;
+	bool multicast;
+	u32 info_flags = 0;
+	u16 info_id = 0;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_sub_if_data *ap_sdata;
+	enum ieee80211_band band;
+
+	if (unlikely(skb->len < ETH_HLEN))
+		goto fail;
+
+	/* convert Ethernet header to proper 802.11 header (based on
+	 * operation mode) */
+	ethertype = (skb->data[12] << 8) | skb->data[13];
+	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
+
+	rcu_read_lock();
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP_VLAN:
+		sta = rcu_dereference(sdata->u.vlan.sta);
+		if (sta) {
+			fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
+			/* RA TA DA SA */
+			memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
+			memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
+			memcpy(hdr.addr3, skb->data, ETH_ALEN);
+			memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
+			hdrlen = 30;
+			authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
+			wme_sta = test_sta_flag(sta, WLAN_STA_WME);
+		}
+		ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
+					u.ap);
+		chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
+		if (sta)
+			break;
+		/* fall through */
+	case NL80211_IFTYPE_AP:
+		if (sdata->vif.type == NL80211_IFTYPE_AP)
+			chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
+		/* DA BSSID SA */
+		memcpy(hdr.addr1, skb->data, ETH_ALEN);
+		memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
+		memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
+		hdrlen = 24;
+		band = chanctx_conf->def.chan->band;
+		break;
+	case NL80211_IFTYPE_WDS:
+		fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
+		/* RA TA DA SA */
+		memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
+		memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
+		memcpy(hdr.addr3, skb->data, ETH_ALEN);
+		memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
+		hdrlen = 30;
+		/*
+		 * This is the exception! WDS style interfaces are prohibited
+		 * when channel contexts are in used so this must be valid
+		 */
+		band = local->hw.conf.chandef.chan->band;
+		break;
+#ifdef CPTCFG_MAC80211_MESH
+	case NL80211_IFTYPE_MESH_POINT:
+		if (!sdata->u.mesh.mshcfg.dot11MeshTTL) {
+			/* Do not send frames with mesh_ttl == 0 */
+			sdata->u.mesh.mshstats.dropped_frames_ttl++;
+			goto fail_rcu;
+		}
+
+		if (!is_multicast_ether_addr(skb->data)) {
+			struct sta_info *next_hop;
+			bool mpp_lookup = true;
+
+			mpath = mesh_path_lookup(sdata, skb->data);
+			if (mpath) {
+				mpp_lookup = false;
+				next_hop = rcu_dereference(mpath->next_hop);
+				if (!next_hop ||
+				    !(mpath->flags & (MESH_PATH_ACTIVE |
+						      MESH_PATH_RESOLVING)))
+					mpp_lookup = true;
+			}
+
+			if (mpp_lookup)
+				mppath = mpp_path_lookup(sdata, skb->data);
+
+			if (mppath && mpath)
+				mesh_path_del(mpath->sdata, mpath->dst);
+		}
+
+		/*
+		 * Use address extension if it is a packet from
+		 * another interface or if we know the destination
+		 * is being proxied by a portal (i.e. portal address
+		 * differs from proxied address)
+		 */
+		if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
+		    !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
+			hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
+					skb->data, skb->data + ETH_ALEN);
+			meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
+							       NULL, NULL);
+		} else {
+			/* DS -> MBSS (802.11-2012 13.11.3.3).
+			 * For unicast with unknown forwarding information,
+			 * destination might be in the MBSS or if that fails
+			 * forwarded to another mesh gate. In either case
+			 * resolution will be handled in ieee80211_xmit(), so
+			 * leave the original DA. This also works for mcast */
+			const u8 *mesh_da = skb->data;
+
+			if (mppath)
+				mesh_da = mppath->mpp;
+			else if (mpath)
+				mesh_da = mpath->dst;
+
+			hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
+					mesh_da, sdata->vif.addr);
+			if (is_multicast_ether_addr(mesh_da))
+				/* DA TA mSA AE:SA */
+				meshhdrlen = ieee80211_new_mesh_header(
+						sdata, &mesh_hdr,
+						skb->data + ETH_ALEN, NULL);
+			else
+				/* RA TA mDA mSA AE:DA SA */
+				meshhdrlen = ieee80211_new_mesh_header(
+						sdata, &mesh_hdr, skb->data,
+						skb->data + ETH_ALEN);
+
+		}
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
+		break;
+#endif
+	case NL80211_IFTYPE_STATION:
+		if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
+			bool tdls_peer = false;
+
+			sta = sta_info_get(sdata, skb->data);
+			if (sta) {
+				authorized = test_sta_flag(sta,
+							WLAN_STA_AUTHORIZED);
+				wme_sta = test_sta_flag(sta, WLAN_STA_WME);
+				tdls_peer = test_sta_flag(sta,
+							 WLAN_STA_TDLS_PEER);
+				tdls_auth = test_sta_flag(sta,
+						WLAN_STA_TDLS_PEER_AUTH);
+			}
+
+			/*
+			 * If the TDLS link is enabled, send everything
+			 * directly. Otherwise, allow TDLS setup frames
+			 * to be transmitted indirectly.
+			 */
+			tdls_direct = tdls_peer && (tdls_auth ||
+				 !(ethertype == ETH_P_TDLS && skb->len > 14 &&
+				   skb->data[14] == WLAN_TDLS_SNAP_RFTYPE));
+		}
+
+		if (tdls_direct) {
+			/* link during setup - throw out frames to peer */
+			if (!tdls_auth)
+				goto fail_rcu;
+
+			/* DA SA BSSID */
+			memcpy(hdr.addr1, skb->data, ETH_ALEN);
+			memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
+			memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
+			hdrlen = 24;
+		}  else if (sdata->u.mgd.use_4addr &&
+			    cpu_to_be16(ethertype) != sdata->control_port_protocol) {
+			fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
+					  IEEE80211_FCTL_TODS);
+			/* RA TA DA SA */
+			memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
+			memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
+			memcpy(hdr.addr3, skb->data, ETH_ALEN);
+			memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
+			hdrlen = 30;
+		} else {
+			fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
+			/* BSSID SA DA */
+			memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
+			memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
+			memcpy(hdr.addr3, skb->data, ETH_ALEN);
+			hdrlen = 24;
+		}
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		/* DA SA BSSID */
+		memcpy(hdr.addr1, skb->data, ETH_ALEN);
+		memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
+		memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
+		hdrlen = 24;
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (!chanctx_conf)
+			goto fail_rcu;
+		band = chanctx_conf->def.chan->band;
+		break;
+	default:
+		goto fail_rcu;
+	}
+
+	/*
+	 * There's no need to try to look up the destination
+	 * if it is a multicast address (which can only happen
+	 * in AP mode)
+	 */
+	multicast = is_multicast_ether_addr(hdr.addr1);
+	if (!multicast) {
+		sta = sta_info_get(sdata, hdr.addr1);
+		if (sta) {
+			authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
+			wme_sta = test_sta_flag(sta, WLAN_STA_WME);
+		}
+	}
+
+	/* For mesh, the use of the QoS header is mandatory */
+	if (ieee80211_vif_is_mesh(&sdata->vif))
+		wme_sta = true;
+
+	/* receiver and we are QoS enabled, use a QoS type frame */
+	if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) {
+		fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
+		hdrlen += 2;
+	}
+
+	/*
+	 * Drop unicast frames to unauthorised stations unless they are
+	 * EAPOL frames from the local station.
+	 */
+	if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
+		     !is_multicast_ether_addr(hdr.addr1) && !authorized &&
+		     (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
+		      !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
+#ifdef CPTCFG_MAC80211_VERBOSE_DEBUG
+		net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
+				    dev->name, hdr.addr1);
+#endif
+
+		I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
+
+		goto fail_rcu;
+	}
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
+	if (unlikely(!multicast && skb->sk &&
+		     skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
+		struct sk_buff *orig_skb = skb;
+
+		skb = skb_clone(skb, GFP_ATOMIC);
+		if (skb) {
+			unsigned long flags;
+			int id;
+
+			spin_lock_irqsave(&local->ack_status_lock, flags);
+			id = idr_alloc(&local->ack_status_frames, orig_skb,
+				       1, 0x10000, GFP_ATOMIC);
+			spin_unlock_irqrestore(&local->ack_status_lock, flags);
+
+			if (id >= 0) {
+				info_id = id;
+				info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+			} else if (skb_shared(skb)) {
+				kfree_skb(orig_skb);
+			} else {
+				kfree_skb(skb);
+				skb = orig_skb;
+			}
+		} else {
+			/* couldn't clone -- lose tx status ... */
+			skb = orig_skb;
+		}
+	}
+#endif
+
+	/*
+	 * If the skb is shared we need to obtain our own copy.
+	 */
+	if (skb_shared(skb)) {
+		struct sk_buff *tmp_skb = skb;
+
+		/* can't happen -- skb is a clone if info_id != 0 */
+		WARN_ON(info_id);
+
+		skb = skb_clone(skb, GFP_ATOMIC);
+		kfree_skb(tmp_skb);
+
+		if (!skb)
+			goto fail_rcu;
+	}
+
+	hdr.frame_control = fc;
+	hdr.duration_id = 0;
+	hdr.seq_ctrl = 0;
+
+	skip_header_bytes = ETH_HLEN;
+	if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
+		encaps_data = bridge_tunnel_header;
+		encaps_len = sizeof(bridge_tunnel_header);
+		skip_header_bytes -= 2;
+	} else if (ethertype >= ETH_P_802_3_MIN) {
+		encaps_data = rfc1042_header;
+		encaps_len = sizeof(rfc1042_header);
+		skip_header_bytes -= 2;
+	} else {
+		encaps_data = NULL;
+		encaps_len = 0;
+	}
+
+	nh_pos = skb_network_header(skb) - skb->data;
+	h_pos = skb_transport_header(skb) - skb->data;
+
+	skb_pull(skb, skip_header_bytes);
+	nh_pos -= skip_header_bytes;
+	h_pos -= skip_header_bytes;
+
+	head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
+
+	/*
+	 * So we need to modify the skb header and hence need a copy of
+	 * that. The head_need variable above doesn't, so far, include
+	 * the needed header space that we don't need right away. If we
+	 * can, then we don't reallocate right now but only after the
+	 * frame arrives at the master device (if it does...)
+	 *
+	 * If we cannot, however, then we will reallocate to include all
+	 * the ever needed space. Also, if we need to reallocate it anyway,
+	 * make it big enough for everything we may ever need.
+	 */
+
+	if (head_need > 0 || skb_cloned(skb)) {
+		head_need += IEEE80211_ENCRYPT_HEADROOM;
+		head_need += local->tx_headroom;
+		head_need = max_t(int, 0, head_need);
+		if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
+			ieee80211_free_txskb(&local->hw, skb);
+			skb = NULL;
+			goto fail_rcu;
+		}
+	}
+
+	if (encaps_data) {
+		memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
+		nh_pos += encaps_len;
+		h_pos += encaps_len;
+	}
+
+#ifdef CPTCFG_MAC80211_MESH
+	if (meshhdrlen > 0) {
+		memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
+		nh_pos += meshhdrlen;
+		h_pos += meshhdrlen;
+	}
+#endif
+
+	if (ieee80211_is_data_qos(fc)) {
+		__le16 *qos_control;
+
+		qos_control = (__le16*) skb_push(skb, 2);
+		memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
+		/*
+		 * Maybe we could actually set some fields here, for now just
+		 * initialise to zero to indicate no special operation.
+		 */
+		*qos_control = 0;
+	} else
+		memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
+
+	nh_pos += hdrlen;
+	h_pos += hdrlen;
+
+	dev->stats.tx_packets++;
+	dev->stats.tx_bytes += skb->len;
+
+	/* Update skb pointers to various headers since this modified frame
+	 * is going to go through Linux networking code that may potentially
+	 * need things like pointer to IP header. */
+	skb_set_mac_header(skb, 0);
+	skb_set_network_header(skb, nh_pos);
+	skb_set_transport_header(skb, h_pos);
+
+	info = IEEE80211_SKB_CB(skb);
+	memset(info, 0, sizeof(*info));
+
+	dev->trans_start = jiffies;
+
+	info->flags = info_flags;
+	info->ack_frame_id = info_id;
+
+	ieee80211_xmit(sdata, skb, band);
+	rcu_read_unlock();
+
+	return NETDEV_TX_OK;
+
+ fail_rcu:
+	rcu_read_unlock();
+ fail:
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
+
+
+/*
+ * ieee80211_clear_tx_pending may not be called in a context where
+ * it is possible that it packets could come in again.
+ */
+void ieee80211_clear_tx_pending(struct ieee80211_local *local)
+{
+	struct sk_buff *skb;
+	int i;
+
+	for (i = 0; i < local->hw.queues; i++) {
+		while ((skb = skb_dequeue(&local->pending[i])) != NULL)
+			ieee80211_free_txskb(&local->hw, skb);
+	}
+}
+
+/*
+ * Returns false if the frame couldn't be transmitted but was queued instead,
+ * which in this case means re-queued -- take as an indication to stop sending
+ * more pending frames.
+ */
+static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
+				     struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta;
+	struct ieee80211_hdr *hdr;
+	bool result;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	sdata = vif_to_sdata(info->control.vif);
+
+	if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (unlikely(!chanctx_conf)) {
+			dev_kfree_skb(skb);
+			return true;
+		}
+		result = ieee80211_tx(sdata, skb, true,
+				      chanctx_conf->def.chan->band);
+	} else {
+		struct sk_buff_head skbs;
+
+		__skb_queue_head_init(&skbs);
+		__skb_queue_tail(&skbs, skb);
+
+		hdr = (struct ieee80211_hdr *)skb->data;
+		sta = sta_info_get(sdata, hdr->addr1);
+
+		result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
+	}
+
+	return result;
+}
+
+/*
+ * Transmit all pending packets. Called from tasklet.
+ */
+void ieee80211_tx_pending(unsigned long data)
+{
+	struct ieee80211_local *local = (struct ieee80211_local *)data;
+	unsigned long flags;
+	int i;
+	bool txok;
+
+	rcu_read_lock();
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	for (i = 0; i < local->hw.queues; i++) {
+		/*
+		 * If queue is stopped by something other than due to pending
+		 * frames, or we have no pending frames, proceed to next queue.
+		 */
+		if (local->queue_stop_reasons[i] ||
+		    skb_queue_empty(&local->pending[i]))
+			continue;
+
+		while (!skb_queue_empty(&local->pending[i])) {
+			struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
+			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+			if (WARN_ON(!info->control.vif)) {
+				ieee80211_free_txskb(&local->hw, skb);
+				continue;
+			}
+
+			spin_unlock_irqrestore(&local->queue_stop_reason_lock,
+						flags);
+
+			txok = ieee80211_tx_pending_skb(local, skb);
+			spin_lock_irqsave(&local->queue_stop_reason_lock,
+					  flags);
+			if (!txok)
+				break;
+		}
+
+		if (skb_queue_empty(&local->pending[i]))
+			ieee80211_propagate_queue_wake(local, i);
+	}
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+	rcu_read_unlock();
+}
+
+/* functions for drivers to get certain frames */
+
+static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
+				       struct ps_data *ps, struct sk_buff *skb)
+{
+	u8 *pos, *tim;
+	int aid0 = 0;
+	int i, have_bits = 0, n1, n2;
+
+	/* Generate bitmap for TIM only if there are any STAs in power save
+	 * mode. */
+	if (atomic_read(&ps->num_sta_ps) > 0)
+		/* in the hope that this is faster than
+		 * checking byte-for-byte */
+		have_bits = !bitmap_empty((unsigned long*)ps->tim,
+					  IEEE80211_MAX_AID+1);
+
+	if (ps->dtim_count == 0)
+		ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
+	else
+		ps->dtim_count--;
+
+	tim = pos = (u8 *) skb_put(skb, 6);
+	*pos++ = WLAN_EID_TIM;
+	*pos++ = 4;
+	*pos++ = ps->dtim_count;
+	*pos++ = sdata->vif.bss_conf.dtim_period;
+
+	if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
+		aid0 = 1;
+
+	ps->dtim_bc_mc = aid0 == 1;
+
+	if (have_bits) {
+		/* Find largest even number N1 so that bits numbered 1 through
+		 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
+		 * (N2 + 1) x 8 through 2007 are 0. */
+		n1 = 0;
+		for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
+			if (ps->tim[i]) {
+				n1 = i & 0xfe;
+				break;
+			}
+		}
+		n2 = n1;
+		for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
+			if (ps->tim[i]) {
+				n2 = i;
+				break;
+			}
+		}
+
+		/* Bitmap control */
+		*pos++ = n1 | aid0;
+		/* Part Virt Bitmap */
+		skb_put(skb, n2 - n1);
+		memcpy(pos, ps->tim + n1, n2 - n1 + 1);
+
+		tim[1] = n2 - n1 + 4;
+	} else {
+		*pos++ = aid0; /* Bitmap control */
+		*pos++ = 0; /* Part Virt Bitmap */
+	}
+}
+
+static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
+				    struct ps_data *ps, struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	/*
+	 * Not very nice, but we want to allow the driver to call
+	 * ieee80211_beacon_get() as a response to the set_tim()
+	 * callback. That, however, is already invoked under the
+	 * sta_lock to guarantee consistent and race-free update
+	 * of the tim bitmap in mac80211 and the driver.
+	 */
+	if (local->tim_in_locked_section) {
+		__ieee80211_beacon_add_tim(sdata, ps, skb);
+	} else {
+		spin_lock_bh(&local->tim_lock);
+		__ieee80211_beacon_add_tim(sdata, ps, skb);
+		spin_unlock_bh(&local->tim_lock);
+	}
+
+	return 0;
+}
+
+struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif,
+					 u16 *tim_offset, u16 *tim_length)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct sk_buff *skb = NULL;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_sub_if_data *sdata = NULL;
+	enum ieee80211_band band;
+	struct ieee80211_tx_rate_control txrc;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	rcu_read_lock();
+
+	sdata = vif_to_sdata(vif);
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+
+	if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
+		goto out;
+
+	if (tim_offset)
+		*tim_offset = 0;
+	if (tim_length)
+		*tim_length = 0;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		struct ieee80211_if_ap *ap = &sdata->u.ap;
+		struct beacon_data *beacon = rcu_dereference(ap->beacon);
+
+		if (beacon) {
+			/*
+			 * headroom, head length,
+			 * tail length and maximum TIM length
+			 */
+			skb = dev_alloc_skb(local->tx_headroom +
+					    beacon->head_len +
+					    beacon->tail_len + 256);
+			if (!skb)
+				goto out;
+
+			skb_reserve(skb, local->tx_headroom);
+			memcpy(skb_put(skb, beacon->head_len), beacon->head,
+			       beacon->head_len);
+
+			ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
+
+			if (tim_offset)
+				*tim_offset = beacon->head_len;
+			if (tim_length)
+				*tim_length = skb->len - beacon->head_len;
+
+			if (beacon->tail)
+				memcpy(skb_put(skb, beacon->tail_len),
+				       beacon->tail, beacon->tail_len);
+		} else
+			goto out;
+	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+		struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+		struct ieee80211_hdr *hdr;
+		struct beacon_data *presp = rcu_dereference(ifibss->presp);
+
+		if (!presp)
+			goto out;
+
+		skb = dev_alloc_skb(local->tx_headroom + presp->head_len);
+		if (!skb)
+			goto out;
+		skb_reserve(skb, local->tx_headroom);
+		memcpy(skb_put(skb, presp->head_len), presp->head,
+		       presp->head_len);
+
+		hdr = (struct ieee80211_hdr *) skb->data;
+		hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+						 IEEE80211_STYPE_BEACON);
+	} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
+		struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+		struct beacon_data *bcn = rcu_dereference(ifmsh->beacon);
+
+		if (!bcn)
+			goto out;
+
+		if (ifmsh->sync_ops)
+			ifmsh->sync_ops->adjust_tbtt(
+						sdata);
+
+		skb = dev_alloc_skb(local->tx_headroom +
+				    bcn->head_len +
+				    256 + /* TIM IE */
+				    bcn->tail_len);
+		if (!skb)
+			goto out;
+		skb_reserve(skb, local->tx_headroom);
+		memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len);
+		ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb);
+		memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len);
+	} else {
+		WARN_ON(1);
+		goto out;
+	}
+
+	band = chanctx_conf->def.chan->band;
+
+	info = IEEE80211_SKB_CB(skb);
+
+	info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	info->flags |= IEEE80211_TX_CTL_NO_ACK;
+	info->band = band;
+
+	memset(&txrc, 0, sizeof(txrc));
+	txrc.hw = hw;
+	txrc.sband = local->hw.wiphy->bands[band];
+	txrc.bss_conf = &sdata->vif.bss_conf;
+	txrc.skb = skb;
+	txrc.reported_rate.idx = -1;
+	txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
+	if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
+		txrc.max_rate_idx = -1;
+	else
+		txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
+	txrc.bss = true;
+	rate_control_get_rate(sdata, NULL, &txrc);
+
+	info->control.vif = vif;
+
+	info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
+			IEEE80211_TX_CTL_ASSIGN_SEQ |
+			IEEE80211_TX_CTL_FIRST_FRAGMENT;
+ out:
+	rcu_read_unlock();
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_beacon_get_tim);
+
+struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
+					struct ieee80211_vif *vif)
+{
+	struct ieee80211_if_ap *ap = NULL;
+	struct sk_buff *skb = NULL;
+	struct probe_resp *presp = NULL;
+	struct ieee80211_hdr *hdr;
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	if (sdata->vif.type != NL80211_IFTYPE_AP)
+		return NULL;
+
+	rcu_read_lock();
+
+	ap = &sdata->u.ap;
+	presp = rcu_dereference(ap->probe_resp);
+	if (!presp)
+		goto out;
+
+	skb = dev_alloc_skb(presp->len);
+	if (!skb)
+		goto out;
+
+	memcpy(skb_put(skb, presp->len), presp->data, presp->len);
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	memset(hdr->addr1, 0, sizeof(hdr->addr1));
+
+out:
+	rcu_read_unlock();
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_proberesp_get);
+
+struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
+				     struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_if_managed *ifmgd;
+	struct ieee80211_pspoll *pspoll;
+	struct ieee80211_local *local;
+	struct sk_buff *skb;
+
+	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+		return NULL;
+
+	sdata = vif_to_sdata(vif);
+	ifmgd = &sdata->u.mgd;
+	local = sdata->local;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
+	if (!skb)
+		return NULL;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
+	memset(pspoll, 0, sizeof(*pspoll));
+	pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
+					    IEEE80211_STYPE_PSPOLL);
+	pspoll->aid = cpu_to_le16(ifmgd->aid);
+
+	/* aid in PS-Poll has its two MSBs each set to 1 */
+	pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
+
+	memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
+	memcpy(pspoll->ta, vif->addr, ETH_ALEN);
+
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_pspoll_get);
+
+struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
+				       struct ieee80211_vif *vif)
+{
+	struct ieee80211_hdr_3addr *nullfunc;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_if_managed *ifmgd;
+	struct ieee80211_local *local;
+	struct sk_buff *skb;
+
+	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+		return NULL;
+
+	sdata = vif_to_sdata(vif);
+	ifmgd = &sdata->u.mgd;
+	local = sdata->local;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
+	if (!skb)
+		return NULL;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
+							  sizeof(*nullfunc));
+	memset(nullfunc, 0, sizeof(*nullfunc));
+	nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
+					      IEEE80211_STYPE_NULLFUNC |
+					      IEEE80211_FCTL_TODS);
+	memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
+	memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
+	memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
+
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_nullfunc_get);
+
+struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
+				       struct ieee80211_vif *vif,
+				       const u8 *ssid, size_t ssid_len,
+				       size_t tailroom)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_local *local;
+	struct ieee80211_hdr_3addr *hdr;
+	struct sk_buff *skb;
+	size_t ie_ssid_len;
+	u8 *pos;
+
+	sdata = vif_to_sdata(vif);
+	local = sdata->local;
+	ie_ssid_len = 2 + ssid_len;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
+			    ie_ssid_len + tailroom);
+	if (!skb)
+		return NULL;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
+	memset(hdr, 0, sizeof(*hdr));
+	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					 IEEE80211_STYPE_PROBE_REQ);
+	eth_broadcast_addr(hdr->addr1);
+	memcpy(hdr->addr2, vif->addr, ETH_ALEN);
+	eth_broadcast_addr(hdr->addr3);
+
+	pos = skb_put(skb, ie_ssid_len);
+	*pos++ = WLAN_EID_SSID;
+	*pos++ = ssid_len;
+	if (ssid_len)
+		memcpy(pos, ssid, ssid_len);
+	pos += ssid_len;
+
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_probereq_get);
+
+void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		       const void *frame, size_t frame_len,
+		       const struct ieee80211_tx_info *frame_txctl,
+		       struct ieee80211_rts *rts)
+{
+	const struct ieee80211_hdr *hdr = frame;
+
+	rts->frame_control =
+	    cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
+	rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
+					       frame_txctl);
+	memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
+	memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
+}
+EXPORT_SYMBOL(ieee80211_rts_get);
+
+void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			     const void *frame, size_t frame_len,
+			     const struct ieee80211_tx_info *frame_txctl,
+			     struct ieee80211_cts *cts)
+{
+	const struct ieee80211_hdr *hdr = frame;
+
+	cts->frame_control =
+	    cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
+	cts->duration = ieee80211_ctstoself_duration(hw, vif,
+						     frame_len, frame_txctl);
+	memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
+}
+EXPORT_SYMBOL(ieee80211_ctstoself_get);
+
+struct sk_buff *
+ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
+			  struct ieee80211_vif *vif)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct sk_buff *skb = NULL;
+	struct ieee80211_tx_data tx;
+	struct ieee80211_sub_if_data *sdata;
+	struct ps_data *ps;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+
+	sdata = vif_to_sdata(vif);
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+
+	if (!chanctx_conf)
+		goto out;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		struct beacon_data *beacon =
+				rcu_dereference(sdata->u.ap.beacon);
+
+		if (!beacon || !beacon->head)
+			goto out;
+
+		ps = &sdata->u.ap.ps;
+	} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
+		ps = &sdata->u.mesh.ps;
+	} else {
+		goto out;
+	}
+
+	if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
+		goto out; /* send buffered bc/mc only after DTIM beacon */
+
+	while (1) {
+		skb = skb_dequeue(&ps->bc_buf);
+		if (!skb)
+			goto out;
+		local->total_ps_buffered--;
+
+		if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
+			struct ieee80211_hdr *hdr =
+				(struct ieee80211_hdr *) skb->data;
+			/* more buffered multicast/broadcast frames ==> set
+			 * MoreData flag in IEEE 802.11 header to inform PS
+			 * STAs */
+			hdr->frame_control |=
+				cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+		}
+
+		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+			sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
+		if (!ieee80211_tx_prepare(sdata, &tx, skb))
+			break;
+		dev_kfree_skb_any(skb);
+	}
+
+	info = IEEE80211_SKB_CB(skb);
+
+	tx.flags |= IEEE80211_TX_PS_BUFFERED;
+	info->band = chanctx_conf->def.chan->band;
+
+	if (invoke_tx_handlers(&tx))
+		skb = NULL;
+ out:
+	rcu_read_unlock();
+
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_get_buffered_bc);
+
+void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb, int tid,
+				 enum ieee80211_band band)
+{
+	int ac = ieee802_1d_to_ac[tid & 7];
+
+	skb_set_mac_header(skb, 0);
+	skb_set_network_header(skb, 0);
+	skb_set_transport_header(skb, 0);
+
+	skb_set_queue_mapping(skb, ac);
+	skb->priority = tid;
+
+	skb->dev = sdata->dev;
+
+	/*
+	 * The other path calling ieee80211_xmit is from the tasklet,
+	 * and while we can handle concurrent transmissions locking
+	 * requirements are that we do not come into tx with bhs on.
+	 */
+	local_bh_disable();
+	ieee80211_xmit(sdata, skb, band);
+	local_bh_enable();
+}
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
new file mode 100644
index 0000000..5db8eb5
--- /dev/null
+++ b/net/mac80211/util.c
@@ -0,0 +1,2234 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * utilities for mac80211
+ */
+
+#include <net/mac80211.h>
+#include <linux/netdevice.h>
+#include <linux/export.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/bitmap.h>
+#include <linux/crc32.h>
+#include <net/net_namespace.h>
+#include <net/cfg80211.h>
+#include <net/rtnetlink.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "mesh.h"
+#include "wme.h"
+#include "led.h"
+#include "wep.h"
+
+/* privid for wiphys to determine whether they belong to us or not */
+void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
+
+struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
+{
+	struct ieee80211_local *local;
+	BUG_ON(!wiphy);
+
+	local = wiphy_priv(wiphy);
+	return &local->hw;
+}
+EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
+
+u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
+			enum nl80211_iftype type)
+{
+	__le16 fc = hdr->frame_control;
+
+	 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
+	if (len < 16)
+		return NULL;
+
+	if (ieee80211_is_data(fc)) {
+		if (len < 24) /* drop incorrect hdr len (data) */
+			return NULL;
+
+		if (ieee80211_has_a4(fc))
+			return NULL;
+		if (ieee80211_has_tods(fc))
+			return hdr->addr1;
+		if (ieee80211_has_fromds(fc))
+			return hdr->addr2;
+
+		return hdr->addr3;
+	}
+
+	if (ieee80211_is_mgmt(fc)) {
+		if (len < 24) /* drop incorrect hdr len (mgmt) */
+			return NULL;
+		return hdr->addr3;
+	}
+
+	if (ieee80211_is_ctl(fc)) {
+		if(ieee80211_is_pspoll(fc))
+			return hdr->addr1;
+
+		if (ieee80211_is_back_req(fc)) {
+			switch (type) {
+			case NL80211_IFTYPE_STATION:
+				return hdr->addr2;
+			case NL80211_IFTYPE_AP:
+			case NL80211_IFTYPE_AP_VLAN:
+				return hdr->addr1;
+			default:
+				break; /* fall through to the return */
+			}
+		}
+	}
+
+	return NULL;
+}
+
+void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+	struct ieee80211_hdr *hdr;
+
+	skb_queue_walk(&tx->skbs, skb) {
+		hdr = (struct ieee80211_hdr *) skb->data;
+		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+	}
+}
+
+int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
+			     int rate, int erp, int short_preamble)
+{
+	int dur;
+
+	/* calculate duration (in microseconds, rounded up to next higher
+	 * integer if it includes a fractional microsecond) to send frame of
+	 * len bytes (does not include FCS) at the given rate. Duration will
+	 * also include SIFS.
+	 *
+	 * rate is in 100 kbps, so divident is multiplied by 10 in the
+	 * DIV_ROUND_UP() operations.
+	 */
+
+	if (band == IEEE80211_BAND_5GHZ || erp) {
+		/*
+		 * OFDM:
+		 *
+		 * N_DBPS = DATARATE x 4
+		 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
+		 *	(16 = SIGNAL time, 6 = tail bits)
+		 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
+		 *
+		 * T_SYM = 4 usec
+		 * 802.11a - 17.5.2: aSIFSTime = 16 usec
+		 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
+		 *	signal ext = 6 usec
+		 */
+		dur = 16; /* SIFS + signal ext */
+		dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
+		dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
+		dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
+					4 * rate); /* T_SYM x N_SYM */
+	} else {
+		/*
+		 * 802.11b or 802.11g with 802.11b compatibility:
+		 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
+		 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
+		 *
+		 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
+		 * aSIFSTime = 10 usec
+		 * aPreambleLength = 144 usec or 72 usec with short preamble
+		 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
+		 */
+		dur = 10; /* aSIFSTime = 10 usec */
+		dur += short_preamble ? (72 + 24) : (144 + 48);
+
+		dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
+	}
+
+	return dur;
+}
+
+/* Exported duration function for driver use */
+__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
+					struct ieee80211_vif *vif,
+					enum ieee80211_band band,
+					size_t frame_len,
+					struct ieee80211_rate *rate)
+{
+	struct ieee80211_sub_if_data *sdata;
+	u16 dur;
+	int erp;
+	bool short_preamble = false;
+
+	erp = 0;
+	if (vif) {
+		sdata = vif_to_sdata(vif);
+		short_preamble = sdata->vif.bss_conf.use_short_preamble;
+		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
+			erp = rate->flags & IEEE80211_RATE_ERP_G;
+	}
+
+	dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
+				       short_preamble);
+
+	return cpu_to_le16(dur);
+}
+EXPORT_SYMBOL(ieee80211_generic_frame_duration);
+
+__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
+			      struct ieee80211_vif *vif, size_t frame_len,
+			      const struct ieee80211_tx_info *frame_txctl)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_rate *rate;
+	struct ieee80211_sub_if_data *sdata;
+	bool short_preamble;
+	int erp;
+	u16 dur;
+	struct ieee80211_supported_band *sband;
+
+	sband = local->hw.wiphy->bands[frame_txctl->band];
+
+	short_preamble = false;
+
+	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
+
+	erp = 0;
+	if (vif) {
+		sdata = vif_to_sdata(vif);
+		short_preamble = sdata->vif.bss_conf.use_short_preamble;
+		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
+			erp = rate->flags & IEEE80211_RATE_ERP_G;
+	}
+
+	/* CTS duration */
+	dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
+				       erp, short_preamble);
+	/* Data frame duration */
+	dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
+					erp, short_preamble);
+	/* ACK duration */
+	dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
+					erp, short_preamble);
+
+	return cpu_to_le16(dur);
+}
+EXPORT_SYMBOL(ieee80211_rts_duration);
+
+__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
+				    struct ieee80211_vif *vif,
+				    size_t frame_len,
+				    const struct ieee80211_tx_info *frame_txctl)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_rate *rate;
+	struct ieee80211_sub_if_data *sdata;
+	bool short_preamble;
+	int erp;
+	u16 dur;
+	struct ieee80211_supported_band *sband;
+
+	sband = local->hw.wiphy->bands[frame_txctl->band];
+
+	short_preamble = false;
+
+	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
+	erp = 0;
+	if (vif) {
+		sdata = vif_to_sdata(vif);
+		short_preamble = sdata->vif.bss_conf.use_short_preamble;
+		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
+			erp = rate->flags & IEEE80211_RATE_ERP_G;
+	}
+
+	/* Data frame duration */
+	dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
+				       erp, short_preamble);
+	if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
+		/* ACK duration */
+		dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
+						erp, short_preamble);
+	}
+
+	return cpu_to_le16(dur);
+}
+EXPORT_SYMBOL(ieee80211_ctstoself_duration);
+
+void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
+{
+	struct ieee80211_sub_if_data *sdata;
+	int n_acs = IEEE80211_NUM_ACS;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		n_acs = 1;
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		int ac;
+
+		if (!sdata->dev)
+			continue;
+
+		if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
+			continue;
+
+		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
+		    local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
+			continue;
+
+		for (ac = 0; ac < n_acs; ac++) {
+			int ac_queue = sdata->vif.hw_queue[ac];
+
+			if (ac_queue == queue ||
+			    (sdata->vif.cab_queue == queue &&
+			     local->queue_stop_reasons[ac_queue] == 0 &&
+			     skb_queue_empty(&local->pending[ac_queue])))
+				netif_wake_subqueue(sdata->dev, ac);
+		}
+	}
+}
+
+static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
+				   enum queue_stop_reason reason)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_wake_queue(local, queue, reason);
+
+	if (WARN_ON(queue >= hw->queues))
+		return;
+
+	if (!test_bit(reason, &local->queue_stop_reasons[queue]))
+		return;
+
+	__clear_bit(reason, &local->queue_stop_reasons[queue]);
+
+	if (local->queue_stop_reasons[queue] != 0)
+		/* someone still has this queue stopped */
+		return;
+
+	if (skb_queue_empty(&local->pending[queue])) {
+		rcu_read_lock();
+		ieee80211_propagate_queue_wake(local, queue);
+		rcu_read_unlock();
+	} else
+		tasklet_schedule(&local->tx_pending_tasklet);
+}
+
+void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
+				    enum queue_stop_reason reason)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	unsigned long flags;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	__ieee80211_wake_queue(hw, queue, reason);
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
+{
+	ieee80211_wake_queue_by_reason(hw, queue,
+				       IEEE80211_QUEUE_STOP_REASON_DRIVER);
+}
+EXPORT_SYMBOL(ieee80211_wake_queue);
+
+static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
+				   enum queue_stop_reason reason)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata;
+	int n_acs = IEEE80211_NUM_ACS;
+
+	trace_stop_queue(local, queue, reason);
+
+	if (WARN_ON(queue >= hw->queues))
+		return;
+
+	if (test_bit(reason, &local->queue_stop_reasons[queue]))
+		return;
+
+	__set_bit(reason, &local->queue_stop_reasons[queue]);
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		n_acs = 1;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		int ac;
+
+		if (!sdata->dev)
+			continue;
+
+		for (ac = 0; ac < n_acs; ac++) {
+			if (sdata->vif.hw_queue[ac] == queue ||
+			    sdata->vif.cab_queue == queue)
+				netif_stop_subqueue(sdata->dev, ac);
+		}
+	}
+	rcu_read_unlock();
+}
+
+void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
+				    enum queue_stop_reason reason)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	unsigned long flags;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	__ieee80211_stop_queue(hw, queue, reason);
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
+{
+	ieee80211_stop_queue_by_reason(hw, queue,
+				       IEEE80211_QUEUE_STOP_REASON_DRIVER);
+}
+EXPORT_SYMBOL(ieee80211_stop_queue);
+
+void ieee80211_add_pending_skb(struct ieee80211_local *local,
+			       struct sk_buff *skb)
+{
+	struct ieee80211_hw *hw = &local->hw;
+	unsigned long flags;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int queue = info->hw_queue;
+
+	if (WARN_ON(!info->control.vif)) {
+		ieee80211_free_txskb(&local->hw, skb);
+		return;
+	}
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+	__skb_queue_tail(&local->pending[queue], skb);
+	__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
+				   struct sk_buff_head *skbs,
+				   void (*fn)(void *data), void *data)
+{
+	struct ieee80211_hw *hw = &local->hw;
+	struct sk_buff *skb;
+	unsigned long flags;
+	int queue, i;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	while ((skb = skb_dequeue(skbs))) {
+		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+		if (WARN_ON(!info->control.vif)) {
+			ieee80211_free_txskb(&local->hw, skb);
+			continue;
+		}
+
+		queue = info->hw_queue;
+
+		__ieee80211_stop_queue(hw, queue,
+				IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+
+		__skb_queue_tail(&local->pending[queue], skb);
+	}
+
+	if (fn)
+		fn(data);
+
+	for (i = 0; i < hw->queues; i++)
+		__ieee80211_wake_queue(hw, i,
+			IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
+				     unsigned long queues,
+				     enum queue_stop_reason reason)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	unsigned long flags;
+	int i;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+
+	for_each_set_bit(i, &queues, hw->queues)
+		__ieee80211_stop_queue(hw, i, reason);
+
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+void ieee80211_stop_queues(struct ieee80211_hw *hw)
+{
+	ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_DRIVER);
+}
+EXPORT_SYMBOL(ieee80211_stop_queues);
+
+int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	unsigned long flags;
+	int ret;
+
+	if (WARN_ON(queue >= hw->queues))
+		return true;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
+		       &local->queue_stop_reasons[queue]);
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ieee80211_queue_stopped);
+
+void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
+				     unsigned long queues,
+				     enum queue_stop_reason reason)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	unsigned long flags;
+	int i;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+
+	for_each_set_bit(i, &queues, hw->queues)
+		__ieee80211_wake_queue(hw, i, reason);
+
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+void ieee80211_wake_queues(struct ieee80211_hw *hw)
+{
+	ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_DRIVER);
+}
+EXPORT_SYMBOL(ieee80211_wake_queues);
+
+void ieee80211_flush_queues(struct ieee80211_local *local,
+			    struct ieee80211_sub_if_data *sdata)
+{
+	u32 queues;
+
+	if (!local->ops->flush)
+		return;
+
+	if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
+		int ac;
+
+		queues = 0;
+
+		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+			queues |= BIT(sdata->vif.hw_queue[ac]);
+		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
+			queues |= BIT(sdata->vif.cab_queue);
+	} else {
+		/* all queues */
+		queues = BIT(local->hw.queues) - 1;
+	}
+
+	ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_FLUSH);
+
+	drv_flush(local, queues, false);
+
+	ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_FLUSH);
+}
+
+void ieee80211_iterate_active_interfaces(
+	struct ieee80211_hw *hw, u32 iter_flags,
+	void (*iterator)(void *data, u8 *mac,
+			 struct ieee80211_vif *vif),
+	void *data)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata;
+
+	mutex_lock(&local->iflist_mtx);
+
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_MONITOR:
+		case NL80211_IFTYPE_AP_VLAN:
+			continue;
+		default:
+			break;
+		}
+		if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
+		    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+			continue;
+		if (ieee80211_sdata_running(sdata))
+			iterator(data, sdata->vif.addr,
+				 &sdata->vif);
+	}
+
+	sdata = rcu_dereference_protected(local->monitor_sdata,
+					  lockdep_is_held(&local->iflist_mtx));
+	if (sdata &&
+	    (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
+	     sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+		iterator(data, sdata->vif.addr, &sdata->vif);
+
+	mutex_unlock(&local->iflist_mtx);
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
+
+void ieee80211_iterate_active_interfaces_atomic(
+	struct ieee80211_hw *hw, u32 iter_flags,
+	void (*iterator)(void *data, u8 *mac,
+			 struct ieee80211_vif *vif),
+	void *data)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_MONITOR:
+		case NL80211_IFTYPE_AP_VLAN:
+			continue;
+		default:
+			break;
+		}
+		if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
+		    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+			continue;
+		if (ieee80211_sdata_running(sdata))
+			iterator(data, sdata->vif.addr,
+				 &sdata->vif);
+	}
+
+	sdata = rcu_dereference(local->monitor_sdata);
+	if (sdata &&
+	    (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
+	     sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+		iterator(data, sdata->vif.addr, &sdata->vif);
+
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
+
+/*
+ * Nothing should have been stuffed into the workqueue during
+ * the suspend->resume cycle. If this WARN is seen then there
+ * is a bug with either the driver suspend or something in
+ * mac80211 stuffing into the workqueue which we haven't yet
+ * cleared during mac80211's suspend cycle.
+ */
+static bool ieee80211_can_queue_work(struct ieee80211_local *local)
+{
+	if (WARN(local->suspended && !local->resuming,
+		 "queueing ieee80211 work while going to suspend\n"))
+		return false;
+
+	return true;
+}
+
+void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	if (!ieee80211_can_queue_work(local))
+		return;
+
+	queue_work(local->workqueue, work);
+}
+EXPORT_SYMBOL(ieee80211_queue_work);
+
+void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
+				  struct delayed_work *dwork,
+				  unsigned long delay)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	if (!ieee80211_can_queue_work(local))
+		return;
+
+	queue_delayed_work(local->workqueue, dwork, delay);
+}
+EXPORT_SYMBOL(ieee80211_queue_delayed_work);
+
+u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
+			       struct ieee802_11_elems *elems,
+			       u64 filter, u32 crc)
+{
+	size_t left = len;
+	const u8 *pos = start;
+	bool calc_crc = filter != 0;
+	DECLARE_BITMAP(seen_elems, 256);
+	const u8 *ie;
+
+	bitmap_zero(seen_elems, 256);
+	memset(elems, 0, sizeof(*elems));
+	elems->ie_start = start;
+	elems->total_len = len;
+
+	while (left >= 2) {
+		u8 id, elen;
+		bool elem_parse_failed;
+
+		id = *pos++;
+		elen = *pos++;
+		left -= 2;
+
+		if (elen > left) {
+			elems->parse_error = true;
+			break;
+		}
+
+		switch (id) {
+		case WLAN_EID_SSID:
+		case WLAN_EID_SUPP_RATES:
+		case WLAN_EID_FH_PARAMS:
+		case WLAN_EID_DS_PARAMS:
+		case WLAN_EID_CF_PARAMS:
+		case WLAN_EID_TIM:
+		case WLAN_EID_IBSS_PARAMS:
+		case WLAN_EID_CHALLENGE:
+		case WLAN_EID_RSN:
+		case WLAN_EID_ERP_INFO:
+		case WLAN_EID_EXT_SUPP_RATES:
+		case WLAN_EID_HT_CAPABILITY:
+		case WLAN_EID_HT_OPERATION:
+		case WLAN_EID_VHT_CAPABILITY:
+		case WLAN_EID_VHT_OPERATION:
+		case WLAN_EID_MESH_ID:
+		case WLAN_EID_MESH_CONFIG:
+		case WLAN_EID_PEER_MGMT:
+		case WLAN_EID_PREQ:
+		case WLAN_EID_PREP:
+		case WLAN_EID_PERR:
+		case WLAN_EID_RANN:
+		case WLAN_EID_CHANNEL_SWITCH:
+		case WLAN_EID_EXT_CHANSWITCH_ANN:
+		case WLAN_EID_COUNTRY:
+		case WLAN_EID_PWR_CONSTRAINT:
+		case WLAN_EID_TIMEOUT_INTERVAL:
+		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
+		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
+		/*
+		 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
+		 * that if the content gets bigger it might be needed more than once
+		 */
+			if (test_bit(id, seen_elems)) {
+				elems->parse_error = true;
+				left -= elen;
+				pos += elen;
+				continue;
+			}
+			break;
+		}
+
+		if (calc_crc && id < 64 && (filter & (1ULL << id)))
+			crc = crc32_be(crc, pos - 2, elen + 2);
+
+		elem_parse_failed = false;
+
+		switch (id) {
+		case WLAN_EID_SSID:
+			elems->ssid = pos;
+			elems->ssid_len = elen;
+			break;
+		case WLAN_EID_SUPP_RATES:
+			elems->supp_rates = pos;
+			elems->supp_rates_len = elen;
+			break;
+		case WLAN_EID_DS_PARAMS:
+			if (elen >= 1)
+				elems->ds_params = pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_TIM:
+			if (elen >= sizeof(struct ieee80211_tim_ie)) {
+				elems->tim = (void *)pos;
+				elems->tim_len = elen;
+			} else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_CHALLENGE:
+			elems->challenge = pos;
+			elems->challenge_len = elen;
+			break;
+		case WLAN_EID_VENDOR_SPECIFIC:
+			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
+			    pos[2] == 0xf2) {
+				/* Microsoft OUI (00:50:F2) */
+
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+
+				if (elen >= 5 && pos[3] == 2) {
+					/* OUI Type 2 - WMM IE */
+					if (pos[4] == 0) {
+						elems->wmm_info = pos;
+						elems->wmm_info_len = elen;
+					} else if (pos[4] == 1) {
+						elems->wmm_param = pos;
+						elems->wmm_param_len = elen;
+					}
+				}
+			}
+			break;
+		case WLAN_EID_RSN:
+			elems->rsn = pos;
+			elems->rsn_len = elen;
+			break;
+		case WLAN_EID_ERP_INFO:
+			if (elen >= 1)
+				elems->erp_info = pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_EXT_SUPP_RATES:
+			elems->ext_supp_rates = pos;
+			elems->ext_supp_rates_len = elen;
+			break;
+		case WLAN_EID_HT_CAPABILITY:
+			if (elen >= sizeof(struct ieee80211_ht_cap))
+				elems->ht_cap_elem = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_HT_OPERATION:
+			if (elen >= sizeof(struct ieee80211_ht_operation))
+				elems->ht_operation = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_VHT_CAPABILITY:
+			if (elen >= sizeof(struct ieee80211_vht_cap))
+				elems->vht_cap_elem = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_VHT_OPERATION:
+			if (elen >= sizeof(struct ieee80211_vht_operation))
+				elems->vht_operation = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_OPMODE_NOTIF:
+			if (elen > 0)
+				elems->opmode_notif = pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_MESH_ID:
+			elems->mesh_id = pos;
+			elems->mesh_id_len = elen;
+			break;
+		case WLAN_EID_MESH_CONFIG:
+			if (elen >= sizeof(struct ieee80211_meshconf_ie))
+				elems->mesh_config = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_PEER_MGMT:
+			elems->peering = pos;
+			elems->peering_len = elen;
+			break;
+		case WLAN_EID_MESH_AWAKE_WINDOW:
+			if (elen >= 2)
+				elems->awake_window = (void *)pos;
+			break;
+		case WLAN_EID_PREQ:
+			elems->preq = pos;
+			elems->preq_len = elen;
+			break;
+		case WLAN_EID_PREP:
+			elems->prep = pos;
+			elems->prep_len = elen;
+			break;
+		case WLAN_EID_PERR:
+			elems->perr = pos;
+			elems->perr_len = elen;
+			break;
+		case WLAN_EID_RANN:
+			if (elen >= sizeof(struct ieee80211_rann_ie))
+				elems->rann = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_CHANNEL_SWITCH:
+			if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->ch_switch_ie = (void *)pos;
+			break;
+		case WLAN_EID_EXT_CHANSWITCH_ANN:
+			if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->ext_chansw_ie = (void *)pos;
+			break;
+		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
+			if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->sec_chan_offs = (void *)pos;
+			break;
+		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
+			if (!action ||
+			    elen != sizeof(*elems->wide_bw_chansw_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->wide_bw_chansw_ie = (void *)pos;
+			break;
+		case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
+			if (action) {
+				elem_parse_failed = true;
+				break;
+			}
+			/*
+			 * This is a bit tricky, but as we only care about
+			 * the wide bandwidth channel switch element, so
+			 * just parse it out manually.
+			 */
+			ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
+					      pos, elen);
+			if (ie) {
+				if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
+					elems->wide_bw_chansw_ie =
+						(void *)(ie + 2);
+				else
+					elem_parse_failed = true;
+			}
+			break;
+		case WLAN_EID_COUNTRY:
+			elems->country_elem = pos;
+			elems->country_elem_len = elen;
+			break;
+		case WLAN_EID_PWR_CONSTRAINT:
+			if (elen != 1) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->pwr_constr_elem = pos;
+			break;
+		case WLAN_EID_TIMEOUT_INTERVAL:
+			if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
+				elems->timeout_int = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		default:
+			break;
+		}
+
+		if (elem_parse_failed)
+			elems->parse_error = true;
+		else
+			__set_bit(id, seen_elems);
+
+		left -= elen;
+		pos += elen;
+	}
+
+	if (left != 0)
+		elems->parse_error = true;
+
+	return crc;
+}
+
+void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
+			       bool bss_notify)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_tx_queue_params qparam;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	int ac;
+	bool use_11b, enable_qos;
+	int aCWmin, aCWmax;
+
+	if (!local->ops->conf_tx)
+		return;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return;
+
+	memset(&qparam, 0, sizeof(qparam));
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	use_11b = (chanctx_conf &&
+		   chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
+		 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
+	rcu_read_unlock();
+
+	/*
+	 * By default disable QoS in STA mode for old access points, which do
+	 * not support 802.11e. New APs will provide proper queue parameters,
+	 * that we will configure later.
+	 */
+	enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		/* Set defaults according to 802.11-2007 Table 7-37 */
+		aCWmax = 1023;
+		if (use_11b)
+			aCWmin = 31;
+		else
+			aCWmin = 15;
+
+		if (enable_qos) {
+			switch (ac) {
+			case IEEE80211_AC_BK:
+				qparam.cw_max = aCWmax;
+				qparam.cw_min = aCWmin;
+				qparam.txop = 0;
+				qparam.aifs = 7;
+				break;
+			/* never happens but let's not leave undefined */
+			default:
+			case IEEE80211_AC_BE:
+				qparam.cw_max = aCWmax;
+				qparam.cw_min = aCWmin;
+				qparam.txop = 0;
+				qparam.aifs = 3;
+				break;
+			case IEEE80211_AC_VI:
+				qparam.cw_max = aCWmin;
+				qparam.cw_min = (aCWmin + 1) / 2 - 1;
+				if (use_11b)
+					qparam.txop = 6016/32;
+				else
+					qparam.txop = 3008/32;
+				qparam.aifs = 2;
+				break;
+			case IEEE80211_AC_VO:
+				qparam.cw_max = (aCWmin + 1) / 2 - 1;
+				qparam.cw_min = (aCWmin + 1) / 4 - 1;
+				if (use_11b)
+					qparam.txop = 3264/32;
+				else
+					qparam.txop = 1504/32;
+				qparam.aifs = 2;
+				break;
+			}
+		} else {
+			/* Confiure old 802.11b/g medium access rules. */
+			qparam.cw_max = aCWmax;
+			qparam.cw_min = aCWmin;
+			qparam.txop = 0;
+			qparam.aifs = 2;
+		}
+
+		qparam.uapsd = false;
+
+		sdata->tx_conf[ac] = qparam;
+		drv_conf_tx(local, sdata, ac, &qparam);
+	}
+
+	if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+	    sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
+		sdata->vif.bss_conf.qos = enable_qos;
+		if (bss_notify)
+			ieee80211_bss_info_change_notify(sdata,
+							 BSS_CHANGED_QOS);
+	}
+}
+
+void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
+				  const size_t supp_rates_len,
+				  const u8 *supp_rates)
+{
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	int i, have_higher_than_11mbit = 0;
+
+	/* cf. IEEE 802.11 9.2.12 */
+	for (i = 0; i < supp_rates_len; i++)
+		if ((supp_rates[i] & 0x7f) * 5 > 110)
+			have_higher_than_11mbit = 1;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+
+	if (chanctx_conf &&
+	    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
+	    have_higher_than_11mbit)
+		sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
+	else
+		sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
+	rcu_read_unlock();
+
+	ieee80211_set_wmm_default(sdata, true);
+}
+
+u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
+			      enum ieee80211_band band)
+{
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_rate *bitrates;
+	u32 mandatory_rates;
+	enum ieee80211_rate_flags mandatory_flag;
+	int i;
+
+	sband = local->hw.wiphy->bands[band];
+	if (WARN_ON(!sband))
+		return 1;
+
+	if (band == IEEE80211_BAND_2GHZ)
+		mandatory_flag = IEEE80211_RATE_MANDATORY_B;
+	else
+		mandatory_flag = IEEE80211_RATE_MANDATORY_A;
+
+	bitrates = sband->bitrates;
+	mandatory_rates = 0;
+	for (i = 0; i < sband->n_bitrates; i++)
+		if (bitrates[i].flags & mandatory_flag)
+			mandatory_rates |= BIT(i);
+	return mandatory_rates;
+}
+
+void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
+			 u16 transaction, u16 auth_alg, u16 status,
+			 const u8 *extra, size_t extra_len, const u8 *da,
+			 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
+			 u32 tx_flags)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	int err;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom +
+			    sizeof(*mgmt) + 6 + extra_len);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
+	memset(mgmt, 0, 24 + 6);
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_AUTH);
+	memcpy(mgmt->da, da, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, bssid, ETH_ALEN);
+	mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
+	mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
+	mgmt->u.auth.status_code = cpu_to_le16(status);
+	if (extra)
+		memcpy(skb_put(skb, extra_len), extra, extra_len);
+
+	if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
+		mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+		err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
+		WARN_ON(err);
+	}
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
+					tx_flags;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
+				    const u8 *bssid, u16 stype, u16 reason,
+				    bool send_frame, u8 *frame_buf)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt = (void *)frame_buf;
+
+	/* build frame */
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
+	mgmt->duration = 0; /* initialize only */
+	mgmt->seq_ctrl = 0; /* initialize only */
+	memcpy(mgmt->da, bssid, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, bssid, ETH_ALEN);
+	/* u.deauth.reason_code == u.disassoc.reason_code */
+	mgmt->u.deauth.reason_code = cpu_to_le16(reason);
+
+	if (send_frame) {
+		skb = dev_alloc_skb(local->hw.extra_tx_headroom +
+				    IEEE80211_DEAUTH_FRAME_LEN);
+		if (!skb)
+			return;
+
+		skb_reserve(skb, local->hw.extra_tx_headroom);
+
+		/* copy in frame */
+		memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
+		       mgmt, IEEE80211_DEAUTH_FRAME_LEN);
+
+		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
+		    !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
+			IEEE80211_SKB_CB(skb)->flags |=
+				IEEE80211_TX_INTFL_DONT_ENCRYPT;
+
+		ieee80211_tx_skb(sdata, skb);
+	}
+}
+
+int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
+			     size_t buffer_len, const u8 *ie, size_t ie_len,
+			     enum ieee80211_band band, u32 rate_mask,
+			     u8 channel)
+{
+	struct ieee80211_supported_band *sband;
+	u8 *pos = buffer, *end = buffer + buffer_len;
+	size_t offset = 0, noffset;
+	int supp_rates_len, i;
+	u8 rates[32];
+	int num_rates;
+	int ext_rates_len;
+
+	sband = local->hw.wiphy->bands[band];
+	if (WARN_ON_ONCE(!sband))
+		return 0;
+
+	num_rates = 0;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if ((BIT(i) & rate_mask) == 0)
+			continue; /* skip rate */
+		rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
+	}
+
+	supp_rates_len = min_t(int, num_rates, 8);
+
+	if (end - pos < 2 + supp_rates_len)
+		goto out_err;
+	*pos++ = WLAN_EID_SUPP_RATES;
+	*pos++ = supp_rates_len;
+	memcpy(pos, rates, supp_rates_len);
+	pos += supp_rates_len;
+
+	/* insert "request information" if in custom IEs */
+	if (ie && ie_len) {
+		static const u8 before_extrates[] = {
+			WLAN_EID_SSID,
+			WLAN_EID_SUPP_RATES,
+			WLAN_EID_REQUEST,
+		};
+		noffset = ieee80211_ie_split(ie, ie_len,
+					     before_extrates,
+					     ARRAY_SIZE(before_extrates),
+					     offset);
+		if (end - pos < noffset - offset)
+			goto out_err;
+		memcpy(pos, ie + offset, noffset - offset);
+		pos += noffset - offset;
+		offset = noffset;
+	}
+
+	ext_rates_len = num_rates - supp_rates_len;
+	if (ext_rates_len > 0) {
+		if (end - pos < 2 + ext_rates_len)
+			goto out_err;
+		*pos++ = WLAN_EID_EXT_SUPP_RATES;
+		*pos++ = ext_rates_len;
+		memcpy(pos, rates + supp_rates_len, ext_rates_len);
+		pos += ext_rates_len;
+	}
+
+	if (channel && sband->band == IEEE80211_BAND_2GHZ) {
+		if (end - pos < 3)
+			goto out_err;
+		*pos++ = WLAN_EID_DS_PARAMS;
+		*pos++ = 1;
+		*pos++ = channel;
+	}
+
+	/* insert custom IEs that go before HT */
+	if (ie && ie_len) {
+		static const u8 before_ht[] = {
+			WLAN_EID_SSID,
+			WLAN_EID_SUPP_RATES,
+			WLAN_EID_REQUEST,
+			WLAN_EID_EXT_SUPP_RATES,
+			WLAN_EID_DS_PARAMS,
+			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+		};
+		noffset = ieee80211_ie_split(ie, ie_len,
+					     before_ht, ARRAY_SIZE(before_ht),
+					     offset);
+		if (end - pos < noffset - offset)
+			goto out_err;
+		memcpy(pos, ie + offset, noffset - offset);
+		pos += noffset - offset;
+		offset = noffset;
+	}
+
+	if (sband->ht_cap.ht_supported) {
+		if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
+			goto out_err;
+		pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
+						sband->ht_cap.cap);
+	}
+
+	/*
+	 * If adding more here, adjust code in main.c
+	 * that calculates local->scan_ies_len.
+	 */
+
+	/* add any remaining custom IEs */
+	if (ie && ie_len) {
+		noffset = ie_len;
+		if (end - pos < noffset - offset)
+			goto out_err;
+		memcpy(pos, ie + offset, noffset - offset);
+		pos += noffset - offset;
+	}
+
+	if (sband->vht_cap.vht_supported) {
+		if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
+			goto out_err;
+		pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
+						 sband->vht_cap.cap);
+	}
+
+	return pos - buffer;
+ out_err:
+	WARN_ONCE(1, "not enough space for preq IEs\n");
+	return pos - buffer;
+}
+
+struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
+					  u8 *dst, u32 ratemask,
+					  struct ieee80211_channel *chan,
+					  const u8 *ssid, size_t ssid_len,
+					  const u8 *ie, size_t ie_len,
+					  bool directed)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	u8 chan_no;
+	int ies_len;
+
+	/*
+	 * Do not send DS Channel parameter for directed probe requests
+	 * in order to maximize the chance that we get a response.  Some
+	 * badly-behaved APs don't respond when this parameter is included.
+	 */
+	if (directed)
+		chan_no = 0;
+	else
+		chan_no = ieee80211_frequency_to_channel(chan->center_freq);
+
+	skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
+				     ssid, ssid_len, 100 + ie_len);
+	if (!skb)
+		return NULL;
+
+	ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
+					   skb_tailroom(skb),
+					   ie, ie_len, chan->band,
+					   ratemask, chan_no);
+	skb_put(skb, ies_len);
+
+	if (dst) {
+		mgmt = (struct ieee80211_mgmt *) skb->data;
+		memcpy(mgmt->da, dst, ETH_ALEN);
+		memcpy(mgmt->bssid, dst, ETH_ALEN);
+	}
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+
+	return skb;
+}
+
+void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
+			      const u8 *ssid, size_t ssid_len,
+			      const u8 *ie, size_t ie_len,
+			      u32 ratemask, bool directed, u32 tx_flags,
+			      struct ieee80211_channel *channel, bool scan)
+{
+	struct sk_buff *skb;
+
+	skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
+					ssid, ssid_len,
+					ie, ie_len, directed);
+	if (skb) {
+		IEEE80211_SKB_CB(skb)->flags |= tx_flags;
+		if (scan)
+			ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
+		else
+			ieee80211_tx_skb(sdata, skb);
+	}
+}
+
+u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
+			    struct ieee802_11_elems *elems,
+			    enum ieee80211_band band, u32 *basic_rates)
+{
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_rate *bitrates;
+	size_t num_rates;
+	u32 supp_rates;
+	int i, j;
+	sband = local->hw.wiphy->bands[band];
+
+	if (WARN_ON(!sband))
+		return 1;
+
+	bitrates = sband->bitrates;
+	num_rates = sband->n_bitrates;
+	supp_rates = 0;
+	for (i = 0; i < elems->supp_rates_len +
+		     elems->ext_supp_rates_len; i++) {
+		u8 rate = 0;
+		int own_rate;
+		bool is_basic;
+		if (i < elems->supp_rates_len)
+			rate = elems->supp_rates[i];
+		else if (elems->ext_supp_rates)
+			rate = elems->ext_supp_rates
+				[i - elems->supp_rates_len];
+		own_rate = 5 * (rate & 0x7f);
+		is_basic = !!(rate & 0x80);
+
+		if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
+			continue;
+
+		for (j = 0; j < num_rates; j++) {
+			if (bitrates[j].bitrate == own_rate) {
+				supp_rates |= BIT(j);
+				if (basic_rates && is_basic)
+					*basic_rates |= BIT(j);
+			}
+		}
+	}
+	return supp_rates;
+}
+
+void ieee80211_stop_device(struct ieee80211_local *local)
+{
+	ieee80211_led_radio(local, false);
+	ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
+
+	cancel_work_sync(&local->reconfig_filter);
+
+	flush_workqueue(local->workqueue);
+	drv_stop(local);
+}
+
+static void ieee80211_assign_chanctx(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_chanctx_conf *conf;
+	struct ieee80211_chanctx *ctx;
+
+	if (!local->use_chanctx)
+		return;
+
+	mutex_lock(&local->chanctx_mtx);
+	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					 lockdep_is_held(&local->chanctx_mtx));
+	if (conf) {
+		ctx = container_of(conf, struct ieee80211_chanctx, conf);
+		drv_assign_vif_chanctx(local, sdata, ctx);
+	}
+	mutex_unlock(&local->chanctx_mtx);
+}
+
+int ieee80211_reconfig(struct ieee80211_local *local)
+{
+	struct ieee80211_hw *hw = &local->hw;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_chanctx *ctx;
+	struct sta_info *sta;
+	int res, i;
+	bool reconfig_due_to_wowlan = false;
+
+#ifdef CONFIG_PM
+	if (local->suspended)
+		local->resuming = true;
+
+	if (local->wowlan) {
+		local->wowlan = false;
+		res = drv_resume(local);
+		if (res < 0) {
+			local->resuming = false;
+			return res;
+		}
+		if (res == 0)
+			goto wake_up;
+		WARN_ON(res > 1);
+		/*
+		 * res is 1, which means the driver requested
+		 * to go through a regular reset on wakeup.
+		 */
+		reconfig_due_to_wowlan = true;
+	}
+#endif
+	/* everything else happens only if HW was up & running */
+	if (!local->open_count)
+		goto wake_up;
+
+	/*
+	 * Upon resume hardware can sometimes be goofy due to
+	 * various platform / driver / bus issues, so restarting
+	 * the device may at times not work immediately. Propagate
+	 * the error.
+	 */
+	res = drv_start(local);
+	if (res) {
+		WARN(local->suspended, "Hardware became unavailable "
+		     "upon resume. This could be a software issue "
+		     "prior to suspend or a hardware issue.\n");
+		return res;
+	}
+
+	/* setup fragmentation threshold */
+	drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
+
+	/* setup RTS threshold */
+	drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
+
+	/* reset coverage class */
+	drv_set_coverage_class(local, hw->wiphy->coverage_class);
+
+	ieee80211_led_radio(local, true);
+	ieee80211_mod_tpt_led_trig(local,
+				   IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
+
+	/* add interfaces */
+	sdata = rtnl_dereference(local->monitor_sdata);
+	if (sdata) {
+		/* in HW restart it exists already */
+		WARN_ON(local->resuming);
+		res = drv_add_interface(local, sdata);
+		if (WARN_ON(res)) {
+			rcu_assign_pointer(local->monitor_sdata, NULL);
+			synchronize_net();
+			kfree(sdata);
+		}
+	}
+
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+		    ieee80211_sdata_running(sdata))
+			res = drv_add_interface(local, sdata);
+	}
+
+	/* add channel contexts */
+	if (local->use_chanctx) {
+		mutex_lock(&local->chanctx_mtx);
+		list_for_each_entry(ctx, &local->chanctx_list, list)
+			WARN_ON(drv_add_chanctx(local, ctx));
+		mutex_unlock(&local->chanctx_mtx);
+	}
+
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+		ieee80211_assign_chanctx(local, sdata);
+	}
+
+	sdata = rtnl_dereference(local->monitor_sdata);
+	if (sdata && ieee80211_sdata_running(sdata))
+		ieee80211_assign_chanctx(local, sdata);
+
+	/* add STAs back */
+	mutex_lock(&local->sta_mtx);
+	list_for_each_entry(sta, &local->sta_list, list) {
+		enum ieee80211_sta_state state;
+
+		if (!sta->uploaded)
+			continue;
+
+		/* AP-mode stations will be added later */
+		if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
+			continue;
+
+		for (state = IEEE80211_STA_NOTEXIST;
+		     state < sta->sta_state; state++)
+			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
+					      state + 1));
+	}
+	mutex_unlock(&local->sta_mtx);
+
+	/* reconfigure tx conf */
+	if (hw->queues >= IEEE80211_NUM_ACS) {
+		list_for_each_entry(sdata, &local->interfaces, list) {
+			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+			    sdata->vif.type == NL80211_IFTYPE_MONITOR ||
+			    !ieee80211_sdata_running(sdata))
+				continue;
+
+			for (i = 0; i < IEEE80211_NUM_ACS; i++)
+				drv_conf_tx(local, sdata, i,
+					    &sdata->tx_conf[i]);
+		}
+	}
+
+	/* reconfigure hardware */
+	ieee80211_hw_config(local, ~0);
+
+	ieee80211_configure_filter(local);
+
+	/* Finally also reconfigure all the BSS information */
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		u32 changed;
+
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		/* common change flags for all interface types */
+		changed = BSS_CHANGED_ERP_CTS_PROT |
+			  BSS_CHANGED_ERP_PREAMBLE |
+			  BSS_CHANGED_ERP_SLOT |
+			  BSS_CHANGED_HT |
+			  BSS_CHANGED_BASIC_RATES |
+			  BSS_CHANGED_BEACON_INT |
+			  BSS_CHANGED_BSSID |
+			  BSS_CHANGED_CQM |
+			  BSS_CHANGED_QOS |
+			  BSS_CHANGED_IDLE |
+			  BSS_CHANGED_TXPOWER;
+
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_STATION:
+			changed |= BSS_CHANGED_ASSOC |
+				   BSS_CHANGED_ARP_FILTER |
+				   BSS_CHANGED_PS;
+
+			if (sdata->u.mgd.dtim_period)
+				changed |= BSS_CHANGED_DTIM_PERIOD;
+
+			mutex_lock(&sdata->u.mgd.mtx);
+			ieee80211_bss_info_change_notify(sdata, changed);
+			mutex_unlock(&sdata->u.mgd.mtx);
+			break;
+		case NL80211_IFTYPE_ADHOC:
+			changed |= BSS_CHANGED_IBSS;
+			/* fall through */
+		case NL80211_IFTYPE_AP:
+			changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
+
+			if (sdata->vif.type == NL80211_IFTYPE_AP) {
+				changed |= BSS_CHANGED_AP_PROBE_RESP;
+
+				if (rcu_access_pointer(sdata->u.ap.beacon))
+					drv_start_ap(local, sdata);
+			}
+
+			/* fall through */
+		case NL80211_IFTYPE_MESH_POINT:
+			if (sdata->vif.bss_conf.enable_beacon) {
+				changed |= BSS_CHANGED_BEACON |
+					   BSS_CHANGED_BEACON_ENABLED;
+				ieee80211_bss_info_change_notify(sdata, changed);
+			}
+			break;
+		case NL80211_IFTYPE_WDS:
+			break;
+		case NL80211_IFTYPE_AP_VLAN:
+		case NL80211_IFTYPE_MONITOR:
+			/* ignore virtual */
+			break;
+		case NL80211_IFTYPE_P2P_DEVICE:
+			changed = BSS_CHANGED_IDLE;
+			break;
+		case NL80211_IFTYPE_UNSPECIFIED:
+		case NUM_NL80211_IFTYPES:
+		case NL80211_IFTYPE_P2P_CLIENT:
+		case NL80211_IFTYPE_P2P_GO:
+			WARN_ON(1);
+			break;
+		}
+	}
+
+	ieee80211_recalc_ps(local, -1);
+
+	/*
+	 * The sta might be in psm against the ap (e.g. because
+	 * this was the state before a hw restart), so we
+	 * explicitly send a null packet in order to make sure
+	 * it'll sync against the ap (and get out of psm).
+	 */
+	if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
+		list_for_each_entry(sdata, &local->interfaces, list) {
+			if (sdata->vif.type != NL80211_IFTYPE_STATION)
+				continue;
+			if (!sdata->u.mgd.associated)
+				continue;
+
+			ieee80211_send_nullfunc(local, sdata, 0);
+		}
+	}
+
+	/* APs are now beaconing, add back stations */
+	mutex_lock(&local->sta_mtx);
+	list_for_each_entry(sta, &local->sta_list, list) {
+		enum ieee80211_sta_state state;
+
+		if (!sta->uploaded)
+			continue;
+
+		if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
+			continue;
+
+		for (state = IEEE80211_STA_NOTEXIST;
+		     state < sta->sta_state; state++)
+			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
+					      state + 1));
+	}
+	mutex_unlock(&local->sta_mtx);
+
+	/* add back keys */
+	list_for_each_entry(sdata, &local->interfaces, list)
+		if (ieee80211_sdata_running(sdata))
+			ieee80211_enable_keys(sdata);
+
+ wake_up:
+	local->in_reconfig = false;
+	barrier();
+
+	if (local->monitors == local->open_count && local->monitors > 0)
+		ieee80211_add_virtual_monitor(local);
+
+	/*
+	 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
+	 * sessions can be established after a resume.
+	 *
+	 * Also tear down aggregation sessions since reconfiguring
+	 * them in a hardware restart scenario is not easily done
+	 * right now, and the hardware will have lost information
+	 * about the sessions, but we and the AP still think they
+	 * are active. This is really a workaround though.
+	 */
+	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+		mutex_lock(&local->sta_mtx);
+
+		list_for_each_entry(sta, &local->sta_list, list) {
+			ieee80211_sta_tear_down_BA_sessions(
+					sta, AGG_STOP_LOCAL_REQUEST);
+			clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
+		}
+
+		mutex_unlock(&local->sta_mtx);
+	}
+
+	ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_SUSPEND);
+
+	/*
+	 * If this is for hw restart things are still running.
+	 * We may want to change that later, however.
+	 */
+	if (!local->suspended || reconfig_due_to_wowlan)
+		drv_restart_complete(local);
+
+	if (!local->suspended)
+		return 0;
+
+#ifdef CONFIG_PM
+	/* first set suspended false, then resuming */
+	local->suspended = false;
+	mb();
+	local->resuming = false;
+
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+		if (sdata->vif.type == NL80211_IFTYPE_STATION)
+			ieee80211_sta_restart(sdata);
+	}
+
+	mod_timer(&local->sta_cleanup, jiffies + 1);
+#else
+	WARN_ON(1);
+#endif
+	return 0;
+}
+
+void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_local *local;
+	struct ieee80211_key *key;
+
+	if (WARN_ON(!vif))
+		return;
+
+	sdata = vif_to_sdata(vif);
+	local = sdata->local;
+
+	if (WARN_ON(!local->resuming))
+		return;
+
+	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+		return;
+
+	sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
+
+	mutex_lock(&local->key_mtx);
+	list_for_each_entry(key, &sdata->key_list, list)
+		key->flags |= KEY_FLAG_TAINTED;
+	mutex_unlock(&local->key_mtx);
+}
+EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
+
+void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_chanctx *chanctx;
+
+	mutex_lock(&local->chanctx_mtx);
+
+	chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					lockdep_is_held(&local->chanctx_mtx));
+
+	if (WARN_ON_ONCE(!chanctx_conf))
+		goto unlock;
+
+	chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
+	ieee80211_recalc_smps_chanctx(local, chanctx);
+ unlock:
+	mutex_unlock(&local->chanctx_mtx);
+}
+
+static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
+{
+	int i;
+
+	for (i = 0; i < n_ids; i++)
+		if (ids[i] == id)
+			return true;
+	return false;
+}
+
+/**
+ * ieee80211_ie_split - split an IE buffer according to ordering
+ *
+ * @ies: the IE buffer
+ * @ielen: the length of the IE buffer
+ * @ids: an array with element IDs that are allowed before
+ *	the split
+ * @n_ids: the size of the element ID array
+ * @offset: offset where to start splitting in the buffer
+ *
+ * This function splits an IE buffer by updating the @offset
+ * variable to point to the location where the buffer should be
+ * split.
+ *
+ * It assumes that the given IE buffer is well-formed, this
+ * has to be guaranteed by the caller!
+ *
+ * It also assumes that the IEs in the buffer are ordered
+ * correctly, if not the result of using this function will not
+ * be ordered correctly either, i.e. it does no reordering.
+ *
+ * The function returns the offset where the next part of the
+ * buffer starts, which may be @ielen if the entire (remainder)
+ * of the buffer should be used.
+ */
+size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
+			  const u8 *ids, int n_ids, size_t offset)
+{
+	size_t pos = offset;
+
+	while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
+		pos += 2 + ies[pos + 1];
+
+	return pos;
+}
+
+size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
+{
+	size_t pos = offset;
+
+	while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
+		pos += 2 + ies[pos + 1];
+
+	return pos;
+}
+
+static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
+					    int rssi_min_thold,
+					    int rssi_max_thold)
+{
+	trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+		return;
+
+	/*
+	 * Scale up threshold values before storing it, as the RSSI averaging
+	 * algorithm uses a scaled up value as well. Change this scaling
+	 * factor if the RSSI averaging algorithm changes.
+	 */
+	sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
+	sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
+}
+
+void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
+				    int rssi_min_thold,
+				    int rssi_max_thold)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	WARN_ON(rssi_min_thold == rssi_max_thold ||
+		rssi_min_thold > rssi_max_thold);
+
+	_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
+				       rssi_max_thold);
+}
+EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
+
+void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	_ieee80211_enable_rssi_reports(sdata, 0, 0);
+}
+EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
+
+u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
+			      u16 cap)
+{
+	__le16 tmp;
+
+	*pos++ = WLAN_EID_HT_CAPABILITY;
+	*pos++ = sizeof(struct ieee80211_ht_cap);
+	memset(pos, 0, sizeof(struct ieee80211_ht_cap));
+
+	/* capability flags */
+	tmp = cpu_to_le16(cap);
+	memcpy(pos, &tmp, sizeof(u16));
+	pos += sizeof(u16);
+
+	/* AMPDU parameters */
+	*pos++ = ht_cap->ampdu_factor |
+		 (ht_cap->ampdu_density <<
+			IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
+
+	/* MCS set */
+	memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
+	pos += sizeof(ht_cap->mcs);
+
+	/* extended capabilities */
+	pos += sizeof(__le16);
+
+	/* BF capabilities */
+	pos += sizeof(__le32);
+
+	/* antenna selection */
+	pos += sizeof(u8);
+
+	return pos;
+}
+
+u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
+			       u32 cap)
+{
+	__le32 tmp;
+
+	*pos++ = WLAN_EID_VHT_CAPABILITY;
+	*pos++ = sizeof(struct ieee80211_vht_cap);
+	memset(pos, 0, sizeof(struct ieee80211_vht_cap));
+
+	/* capability flags */
+	tmp = cpu_to_le32(cap);
+	memcpy(pos, &tmp, sizeof(u32));
+	pos += sizeof(u32);
+
+	/* VHT MCS set */
+	memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
+	pos += sizeof(vht_cap->vht_mcs);
+
+	return pos;
+}
+
+u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
+			       const struct cfg80211_chan_def *chandef,
+			       u16 prot_mode)
+{
+	struct ieee80211_ht_operation *ht_oper;
+	/* Build HT Information */
+	*pos++ = WLAN_EID_HT_OPERATION;
+	*pos++ = sizeof(struct ieee80211_ht_operation);
+	ht_oper = (struct ieee80211_ht_operation *)pos;
+	ht_oper->primary_chan = ieee80211_frequency_to_channel(
+					chandef->chan->center_freq);
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_160:
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_80:
+	case NL80211_CHAN_WIDTH_40:
+		if (chandef->center_freq1 > chandef->chan->center_freq)
+			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+		else
+			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+		break;
+	default:
+		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
+		break;
+	}
+	if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
+	    chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
+	    chandef->width != NL80211_CHAN_WIDTH_20)
+		ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
+
+	ht_oper->operation_mode = cpu_to_le16(prot_mode);
+	ht_oper->stbc_param = 0x0000;
+
+	/* It seems that Basic MCS set and Supported MCS set
+	   are identical for the first 10 bytes */
+	memset(&ht_oper->basic_set, 0, 16);
+	memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
+
+	return pos + sizeof(struct ieee80211_ht_operation);
+}
+
+void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
+				  const struct ieee80211_ht_operation *ht_oper,
+				  struct cfg80211_chan_def *chandef)
+{
+	enum nl80211_channel_type channel_type;
+
+	if (!ht_oper) {
+		cfg80211_chandef_create(chandef, control_chan,
+					NL80211_CHAN_NO_HT);
+		return;
+	}
+
+	switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
+	case IEEE80211_HT_PARAM_CHA_SEC_NONE:
+		channel_type = NL80211_CHAN_HT20;
+		break;
+	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+		channel_type = NL80211_CHAN_HT40PLUS;
+		break;
+	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+		channel_type = NL80211_CHAN_HT40MINUS;
+		break;
+	default:
+		channel_type = NL80211_CHAN_NO_HT;
+	}
+
+	cfg80211_chandef_create(chandef, control_chan, channel_type);
+}
+
+int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
+			    struct sk_buff *skb, bool need_basic,
+			    enum ieee80211_band band)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	int rate;
+	u8 i, rates, *pos;
+	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
+
+	sband = local->hw.wiphy->bands[band];
+	rates = sband->n_bitrates;
+	if (rates > 8)
+		rates = 8;
+
+	if (skb_tailroom(skb) < rates + 2)
+		return -ENOMEM;
+
+	pos = skb_put(skb, rates + 2);
+	*pos++ = WLAN_EID_SUPP_RATES;
+	*pos++ = rates;
+	for (i = 0; i < rates; i++) {
+		u8 basic = 0;
+		if (need_basic && basic_rates & BIT(i))
+			basic = 0x80;
+		rate = sband->bitrates[i].bitrate;
+		*pos++ = basic | (u8) (rate / 5);
+	}
+
+	return 0;
+}
+
+int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
+				struct sk_buff *skb, bool need_basic,
+				enum ieee80211_band band)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	int rate;
+	u8 i, exrates, *pos;
+	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
+
+	sband = local->hw.wiphy->bands[band];
+	exrates = sband->n_bitrates;
+	if (exrates > 8)
+		exrates -= 8;
+	else
+		exrates = 0;
+
+	if (skb_tailroom(skb) < exrates + 2)
+		return -ENOMEM;
+
+	if (exrates) {
+		pos = skb_put(skb, exrates + 2);
+		*pos++ = WLAN_EID_EXT_SUPP_RATES;
+		*pos++ = exrates;
+		for (i = 8; i < sband->n_bitrates; i++) {
+			u8 basic = 0;
+			if (need_basic && basic_rates & BIT(i))
+				basic = 0x80;
+			rate = sband->bitrates[i].bitrate;
+			*pos++ = basic | (u8) (rate / 5);
+		}
+	}
+	return 0;
+}
+
+int ieee80211_ave_rssi(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
+		/* non-managed type inferfaces */
+		return 0;
+	}
+	return ifmgd->ave_beacon_signal / 16;
+}
+EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
+
+u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
+{
+	if (!mcs)
+		return 1;
+
+	/* TODO: consider rx_highest */
+
+	if (mcs->rx_mask[3])
+		return 4;
+	if (mcs->rx_mask[2])
+		return 3;
+	if (mcs->rx_mask[1])
+		return 2;
+	return 1;
+}
+
+/**
+ * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
+ * @local: mac80211 hw info struct
+ * @status: RX status
+ * @mpdu_len: total MPDU length (including FCS)
+ * @mpdu_offset: offset into MPDU to calculate timestamp at
+ *
+ * This function calculates the RX timestamp at the given MPDU offset, taking
+ * into account what the RX timestamp was. An offset of 0 will just normalize
+ * the timestamp to TSF at beginning of MPDU reception.
+ */
+u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
+				     struct ieee80211_rx_status *status,
+				     unsigned int mpdu_len,
+				     unsigned int mpdu_offset)
+{
+	u64 ts = status->mactime;
+	struct rate_info ri;
+	u16 rate;
+
+	if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
+		return 0;
+
+	memset(&ri, 0, sizeof(ri));
+
+	/* Fill cfg80211 rate info */
+	if (status->flag & RX_FLAG_HT) {
+		ri.mcs = status->rate_idx;
+		ri.flags |= RATE_INFO_FLAGS_MCS;
+		if (status->flag & RX_FLAG_40MHZ)
+			ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+		if (status->flag & RX_FLAG_SHORT_GI)
+			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
+	} else if (status->flag & RX_FLAG_VHT) {
+		ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
+		ri.mcs = status->rate_idx;
+		ri.nss = status->vht_nss;
+		if (status->flag & RX_FLAG_40MHZ)
+			ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+		if (status->flag & RX_FLAG_80MHZ)
+			ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
+		if (status->flag & RX_FLAG_80P80MHZ)
+			ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
+		if (status->flag & RX_FLAG_160MHZ)
+			ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
+		if (status->flag & RX_FLAG_SHORT_GI)
+			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
+	} else {
+		struct ieee80211_supported_band *sband;
+
+		sband = local->hw.wiphy->bands[status->band];
+		ri.legacy = sband->bitrates[status->rate_idx].bitrate;
+	}
+
+	rate = cfg80211_calculate_bitrate(&ri);
+	if (WARN_ONCE(!rate,
+		      "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
+		      status->flag, status->rate_idx, status->vht_nss))
+		return 0;
+
+	/* rewind from end of MPDU */
+	if (status->flag & RX_FLAG_MACTIME_END)
+		ts -= mpdu_len * 8 * 10 / rate;
+
+	ts += mpdu_offset * 8 * 10 / rate;
+
+	return ts;
+}
+
+void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
+
+		if (sdata->wdev.cac_started) {
+			ieee80211_vif_release_channel(sdata);
+			cfg80211_cac_event(sdata->dev,
+					   NL80211_RADAR_CAC_ABORTED,
+					   GFP_KERNEL);
+		}
+	}
+	mutex_unlock(&local->iflist_mtx);
+}
+
+void ieee80211_dfs_radar_detected_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, radar_detected_work);
+	struct cfg80211_chan_def chandef;
+
+	ieee80211_dfs_cac_cancel(local);
+
+	if (local->use_chanctx)
+		/* currently not handled */
+		WARN_ON(1);
+	else {
+		chandef = local->hw.conf.chandef;
+		cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
+	}
+}
+
+void ieee80211_radar_detected(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_radar_detected(local);
+
+	ieee80211_queue_work(hw, &local->radar_detected_work);
+}
+EXPORT_SYMBOL(ieee80211_radar_detected);
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
new file mode 100644
index 0000000..171344d
--- /dev/null
+++ b/net/mac80211/vht.c
@@ -0,0 +1,405 @@
+/*
+ * VHT handling
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ieee80211.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "rate.h"
+
+
+static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata,
+				   struct ieee80211_sta_vht_cap *vht_cap,
+				   u32 flag)
+{
+	__le32 le_flag = cpu_to_le32(flag);
+
+	if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag &&
+	    !(sdata->u.mgd.vht_capa.vht_cap_info & le_flag))
+		vht_cap->cap &= ~flag;
+}
+
+void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
+				      struct ieee80211_sta_vht_cap *vht_cap)
+{
+	int i;
+	u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n;
+
+	if (!vht_cap->vht_supported)
+		return;
+
+	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+		return;
+
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_RXLDPC);
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_SHORT_GI_80);
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_SHORT_GI_160);
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_TXSTBC);
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE);
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE);
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN);
+	__check_vhtcap_disable(sdata, vht_cap,
+			       IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN);
+
+	/* Allow user to decrease AMPDU length exponent */
+	if (sdata->u.mgd.vht_capa_mask.vht_cap_info &
+	    cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) {
+		u32 cap, n;
+
+		n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) &
+			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
+		n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
+		cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
+		cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
+
+		if (n < cap) {
+			vht_cap->cap &=
+				~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
+			vht_cap->cap |=
+				n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
+		}
+	}
+
+	/* Allow the user to decrease MCSes */
+	rxmcs_mask =
+		le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map);
+	rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map);
+	rxmcs_n &= rxmcs_mask;
+	rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
+
+	txmcs_mask =
+		le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map);
+	txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map);
+	txmcs_n &= txmcs_mask;
+	txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
+	for (i = 0; i < 8; i++) {
+		u8 m, n, c;
+
+		m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+		n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+		c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+
+		if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
+			  n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
+			rxmcs_cap &= ~(3 << 2*i);
+			rxmcs_cap |= (rxmcs_n & (3 << 2*i));
+		}
+
+		m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+		n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+		c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+
+		if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
+			  n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
+			txmcs_cap &= ~(3 << 2*i);
+			txmcs_cap |= (txmcs_n & (3 << 2*i));
+		}
+	}
+	vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap);
+	vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap);
+}
+
+void
+ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_supported_band *sband,
+				    const struct ieee80211_vht_cap *vht_cap_ie,
+				    struct sta_info *sta)
+{
+	struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
+	struct ieee80211_sta_vht_cap own_cap;
+	u32 cap_info, i;
+
+	memset(vht_cap, 0, sizeof(*vht_cap));
+
+	if (!sta->sta.ht_cap.ht_supported)
+		return;
+
+	if (!vht_cap_ie || !sband->vht_cap.vht_supported)
+		return;
+
+	/* A VHT STA must support 40 MHz */
+	if (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
+		return;
+
+	vht_cap->vht_supported = true;
+
+	own_cap = sband->vht_cap;
+	/*
+	 * If user has specified capability overrides, take care
+	 * of that if the station we're setting up is the AP that
+	 * we advertised a restricted capability set to. Override
+	 * our own capabilities and then use those below.
+	 */
+	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+	    !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
+		ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
+
+	/* take some capabilities as-is */
+	cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
+	vht_cap->cap = cap_info;
+	vht_cap->cap &= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
+			IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 |
+			IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
+			IEEE80211_VHT_CAP_RXLDPC |
+			IEEE80211_VHT_CAP_VHT_TXOP_PS |
+			IEEE80211_VHT_CAP_HTC_VHT |
+			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
+			IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB |
+			IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB |
+			IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
+			IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
+
+	/* and some based on our own capabilities */
+	switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
+	case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
+		vht_cap->cap |= cap_info &
+				IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
+		break;
+	case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
+		vht_cap->cap |= cap_info &
+				IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
+		break;
+	default:
+		/* nothing */
+		break;
+	}
+
+	/* symmetric capabilities */
+	vht_cap->cap |= cap_info & own_cap.cap &
+			(IEEE80211_VHT_CAP_SHORT_GI_80 |
+			 IEEE80211_VHT_CAP_SHORT_GI_160);
+
+	/* remaining ones */
+	if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) {
+		vht_cap->cap |= cap_info &
+				(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
+				 IEEE80211_VHT_CAP_BEAMFORMER_ANTENNAS_MAX |
+				 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MAX);
+	}
+
+	if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
+		vht_cap->cap |= cap_info &
+				IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
+
+	if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)
+		vht_cap->cap |= cap_info &
+				IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
+
+	if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)
+		vht_cap->cap |= cap_info &
+				IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE;
+
+	if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC)
+		vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK;
+
+	if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
+		vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC;
+
+	/* Copy peer MCS info, the driver might need them. */
+	memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
+	       sizeof(struct ieee80211_vht_mcs_info));
+
+	/* but also restrict MCSes */
+	for (i = 0; i < 8; i++) {
+		u16 own_rx, own_tx, peer_rx, peer_tx;
+
+		own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map);
+		own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+
+		own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map);
+		own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+
+		peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
+		peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+
+		peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
+		peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
+
+		if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
+			if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
+				peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
+			else if (own_rx < peer_tx)
+				peer_tx = own_rx;
+		}
+
+		if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
+			if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
+				peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
+			else if (own_tx < peer_rx)
+				peer_rx = own_tx;
+		}
+
+		vht_cap->vht_mcs.rx_mcs_map &=
+			~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
+		vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2);
+
+		vht_cap->vht_mcs.tx_mcs_map &=
+			~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
+		vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2);
+	}
+
+	/* finally set up the bandwidth */
+	switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
+	case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
+	case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
+		sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
+		break;
+	default:
+		sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
+	}
+
+	sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
+}
+
+enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	u32 cap = sta->sta.vht_cap.cap;
+	enum ieee80211_sta_rx_bandwidth bw;
+
+	if (!sta->sta.vht_cap.vht_supported) {
+		bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+				IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+		goto check_max;
+	}
+
+	switch (sdata->vif.bss_conf.chandef.width) {
+	default:
+		WARN_ON_ONCE(1);
+		/* fall through */
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_20:
+	case NL80211_CHAN_WIDTH_40:
+		bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+				IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
+				IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) {
+			bw = IEEE80211_STA_RX_BW_160;
+			break;
+		}
+		/* fall through */
+	case NL80211_CHAN_WIDTH_80P80:
+		if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
+				IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) {
+			bw = IEEE80211_STA_RX_BW_160;
+			break;
+		}
+		/* fall through */
+	case NL80211_CHAN_WIDTH_80:
+		bw = IEEE80211_STA_RX_BW_80;
+	}
+
+ check_max:
+	if (bw > sta->cur_max_bandwidth)
+		bw = sta->cur_max_bandwidth;
+	return bw;
+}
+
+void ieee80211_sta_set_rx_nss(struct sta_info *sta)
+{
+	u8 ht_rx_nss = 0, vht_rx_nss = 0;
+
+	/* if we received a notification already don't overwrite it */
+	if (sta->sta.rx_nss)
+		return;
+
+	if (sta->sta.ht_cap.ht_supported) {
+		if (sta->sta.ht_cap.mcs.rx_mask[0])
+			ht_rx_nss++;
+		if (sta->sta.ht_cap.mcs.rx_mask[1])
+			ht_rx_nss++;
+		if (sta->sta.ht_cap.mcs.rx_mask[2])
+			ht_rx_nss++;
+		if (sta->sta.ht_cap.mcs.rx_mask[3])
+			ht_rx_nss++;
+		/* FIXME: consider rx_highest? */
+	}
+
+	if (sta->sta.vht_cap.vht_supported) {
+		int i;
+		u16 rx_mcs_map;
+
+		rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
+
+		for (i = 7; i >= 0; i--) {
+			u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
+
+			if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
+				vht_rx_nss = i + 1;
+				break;
+			}
+		}
+		/* FIXME: consider rx_highest? */
+	}
+
+	ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
+	sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
+}
+
+void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
+				 struct sta_info *sta, u8 opmode,
+				 enum ieee80211_band band, bool nss_only)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	enum ieee80211_sta_rx_bandwidth new_bw;
+	u32 changed = 0;
+	u8 nss;
+
+	sband = local->hw.wiphy->bands[band];
+
+	/* ignore - no support for BF yet */
+	if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
+		return;
+
+	nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
+	nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
+	nss += 1;
+
+	if (sta->sta.rx_nss != nss) {
+		sta->sta.rx_nss = nss;
+		changed |= IEEE80211_RC_NSS_CHANGED;
+	}
+
+	if (nss_only)
+		goto change;
+
+	switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
+	case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
+		sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
+		break;
+	case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
+		sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
+		break;
+	case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
+		sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
+		break;
+	case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
+		sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
+		break;
+	}
+
+	new_bw = ieee80211_sta_cur_vht_bw(sta);
+	if (new_bw != sta->sta.bandwidth) {
+		sta->sta.bandwidth = new_bw;
+		changed |= IEEE80211_RC_NSS_CHANGED;
+	}
+
+ change:
+	if (changed)
+		rate_control_rate_update(local, sband, sta, changed);
+}
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
new file mode 100644
index 0000000..c04d401
--- /dev/null
+++ b/net/mac80211/wep.c
@@ -0,0 +1,357 @@
+/*
+ * Software WEP encryption implementation
+ * Copyright 2002, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2003, Instant802 Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/random.h>
+#include <linux/compiler.h>
+#include <linux/crc32.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "wep.h"
+
+
+int ieee80211_wep_init(struct ieee80211_local *local)
+{
+	/* start WEP IV from a random value */
+	get_random_bytes(&local->wep_iv, WEP_IV_LEN);
+
+	local->wep_tx_tfm = crypto_alloc_cipher("arc4", 0, CRYPTO_ALG_ASYNC);
+	if (IS_ERR(local->wep_tx_tfm)) {
+		local->wep_rx_tfm = ERR_PTR(-EINVAL);
+		return PTR_ERR(local->wep_tx_tfm);
+	}
+
+	local->wep_rx_tfm = crypto_alloc_cipher("arc4", 0, CRYPTO_ALG_ASYNC);
+	if (IS_ERR(local->wep_rx_tfm)) {
+		crypto_free_cipher(local->wep_tx_tfm);
+		local->wep_tx_tfm = ERR_PTR(-EINVAL);
+		return PTR_ERR(local->wep_rx_tfm);
+	}
+
+	return 0;
+}
+
+void ieee80211_wep_free(struct ieee80211_local *local)
+{
+	if (!IS_ERR(local->wep_tx_tfm))
+		crypto_free_cipher(local->wep_tx_tfm);
+	if (!IS_ERR(local->wep_rx_tfm))
+		crypto_free_cipher(local->wep_rx_tfm);
+}
+
+static inline bool ieee80211_wep_weak_iv(u32 iv, int keylen)
+{
+	/*
+	 * Fluhrer, Mantin, and Shamir have reported weaknesses in the
+	 * key scheduling algorithm of RC4. At least IVs (KeyByte + 3,
+	 * 0xff, N) can be used to speedup attacks, so avoid using them.
+	 */
+	if ((iv & 0xff00) == 0xff00) {
+		u8 B = (iv >> 16) & 0xff;
+		if (B >= 3 && B < 3 + keylen)
+			return true;
+	}
+	return false;
+}
+
+
+static void ieee80211_wep_get_iv(struct ieee80211_local *local,
+				 int keylen, int keyidx, u8 *iv)
+{
+	local->wep_iv++;
+	if (ieee80211_wep_weak_iv(local->wep_iv, keylen))
+		local->wep_iv += 0x0100;
+
+	if (!iv)
+		return;
+
+	*iv++ = (local->wep_iv >> 16) & 0xff;
+	*iv++ = (local->wep_iv >> 8) & 0xff;
+	*iv++ = local->wep_iv & 0xff;
+	*iv++ = keyidx << 6;
+}
+
+
+static u8 *ieee80211_wep_add_iv(struct ieee80211_local *local,
+				struct sk_buff *skb,
+				int keylen, int keyidx)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	unsigned int hdrlen;
+	u8 *newhdr;
+
+	hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+
+	if (WARN_ON(skb_tailroom(skb) < WEP_ICV_LEN ||
+		    skb_headroom(skb) < WEP_IV_LEN))
+		return NULL;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	newhdr = skb_push(skb, WEP_IV_LEN);
+	memmove(newhdr, newhdr + WEP_IV_LEN, hdrlen);
+
+	/* the HW only needs room for the IV, but not the actual IV */
+	if (info->control.hw_key &&
+	    (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
+		return newhdr + hdrlen;
+
+	skb_set_network_header(skb, skb_network_offset(skb) + WEP_IV_LEN);
+	ieee80211_wep_get_iv(local, keylen, keyidx, newhdr + hdrlen);
+	return newhdr + hdrlen;
+}
+
+
+static void ieee80211_wep_remove_iv(struct ieee80211_local *local,
+				    struct sk_buff *skb,
+				    struct ieee80211_key *key)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	unsigned int hdrlen;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	memmove(skb->data + WEP_IV_LEN, skb->data, hdrlen);
+	skb_pull(skb, WEP_IV_LEN);
+}
+
+
+/* Perform WEP encryption using given key. data buffer must have tailroom
+ * for 4-byte ICV. data_len must not include this ICV. Note: this function
+ * does _not_ add IV. data = RC4(data | CRC32(data)) */
+int ieee80211_wep_encrypt_data(struct crypto_cipher *tfm, u8 *rc4key,
+			       size_t klen, u8 *data, size_t data_len)
+{
+	__le32 icv;
+	int i;
+
+	if (IS_ERR(tfm))
+		return -1;
+
+	icv = cpu_to_le32(~crc32_le(~0, data, data_len));
+	put_unaligned(icv, (__le32 *)(data + data_len));
+
+	crypto_cipher_setkey(tfm, rc4key, klen);
+	for (i = 0; i < data_len + WEP_ICV_LEN; i++)
+		crypto_cipher_encrypt_one(tfm, data + i, data + i);
+
+	return 0;
+}
+
+
+/* Perform WEP encryption on given skb. 4 bytes of extra space (IV) in the
+ * beginning of the buffer 4 bytes of extra space (ICV) in the end of the
+ * buffer will be added. Both IV and ICV will be transmitted, so the
+ * payload length increases with 8 bytes.
+ *
+ * WEP frame payload: IV + TX key idx, RC4(data), ICV = RC4(CRC32(data))
+ */
+int ieee80211_wep_encrypt(struct ieee80211_local *local,
+			  struct sk_buff *skb,
+			  const u8 *key, int keylen, int keyidx)
+{
+	u8 *iv;
+	size_t len;
+	u8 rc4key[3 + WLAN_KEY_LEN_WEP104];
+
+	iv = ieee80211_wep_add_iv(local, skb, keylen, keyidx);
+	if (!iv)
+		return -1;
+
+	len = skb->len - (iv + WEP_IV_LEN - skb->data);
+
+	/* Prepend 24-bit IV to RC4 key */
+	memcpy(rc4key, iv, 3);
+
+	/* Copy rest of the WEP key (the secret part) */
+	memcpy(rc4key + 3, key, keylen);
+
+	/* Add room for ICV */
+	skb_put(skb, WEP_ICV_LEN);
+
+	return ieee80211_wep_encrypt_data(local->wep_tx_tfm, rc4key, keylen + 3,
+					  iv + WEP_IV_LEN, len);
+}
+
+
+/* Perform WEP decryption using given key. data buffer includes encrypted
+ * payload, including 4-byte ICV, but _not_ IV. data_len must not include ICV.
+ * Return 0 on success and -1 on ICV mismatch. */
+int ieee80211_wep_decrypt_data(struct crypto_cipher *tfm, u8 *rc4key,
+			       size_t klen, u8 *data, size_t data_len)
+{
+	__le32 crc;
+	int i;
+
+	if (IS_ERR(tfm))
+		return -1;
+
+	crypto_cipher_setkey(tfm, rc4key, klen);
+	for (i = 0; i < data_len + WEP_ICV_LEN; i++)
+		crypto_cipher_decrypt_one(tfm, data + i, data + i);
+
+	crc = cpu_to_le32(~crc32_le(~0, data, data_len));
+	if (memcmp(&crc, data + data_len, WEP_ICV_LEN) != 0)
+		/* ICV mismatch */
+		return -1;
+
+	return 0;
+}
+
+
+/* Perform WEP decryption on given skb. Buffer includes whole WEP part of
+ * the frame: IV (4 bytes), encrypted payload (including SNAP header),
+ * ICV (4 bytes). skb->len includes both IV and ICV.
+ *
+ * Returns 0 if frame was decrypted successfully and ICV was correct and -1 on
+ * failure. If frame is OK, IV and ICV will be removed, i.e., decrypted payload
+ * is moved to the beginning of the skb and skb length will be reduced.
+ */
+static int ieee80211_wep_decrypt(struct ieee80211_local *local,
+				 struct sk_buff *skb,
+				 struct ieee80211_key *key)
+{
+	u32 klen;
+	u8 rc4key[3 + WLAN_KEY_LEN_WEP104];
+	u8 keyidx;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	unsigned int hdrlen;
+	size_t len;
+	int ret = 0;
+
+	if (!ieee80211_has_protected(hdr->frame_control))
+		return -1;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	if (skb->len < hdrlen + WEP_IV_LEN + WEP_ICV_LEN)
+		return -1;
+
+	len = skb->len - hdrlen - WEP_IV_LEN - WEP_ICV_LEN;
+
+	keyidx = skb->data[hdrlen + 3] >> 6;
+
+	if (!key || keyidx != key->conf.keyidx)
+		return -1;
+
+	klen = 3 + key->conf.keylen;
+
+	/* Prepend 24-bit IV to RC4 key */
+	memcpy(rc4key, skb->data + hdrlen, 3);
+
+	/* Copy rest of the WEP key (the secret part) */
+	memcpy(rc4key + 3, key->conf.key, key->conf.keylen);
+
+	if (ieee80211_wep_decrypt_data(local->wep_rx_tfm, rc4key, klen,
+				       skb->data + hdrlen + WEP_IV_LEN,
+				       len))
+		ret = -1;
+
+	/* Trim ICV */
+	skb_trim(skb, skb->len - WEP_ICV_LEN);
+
+	/* Remove IV */
+	memmove(skb->data + WEP_IV_LEN, skb->data, hdrlen);
+	skb_pull(skb, WEP_IV_LEN);
+
+	return ret;
+}
+
+
+static bool ieee80211_wep_is_weak_iv(struct sk_buff *skb,
+				     struct ieee80211_key *key)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	unsigned int hdrlen;
+	u8 *ivpos;
+	u32 iv;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	ivpos = skb->data + hdrlen;
+	iv = (ivpos[0] << 16) | (ivpos[1] << 8) | ivpos[2];
+
+	return ieee80211_wep_weak_iv(iv, key->conf.keylen);
+}
+
+ieee80211_rx_result
+ieee80211_crypto_wep_decrypt(struct ieee80211_rx_data *rx)
+{
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	__le16 fc = hdr->frame_control;
+
+	if (!ieee80211_is_data(fc) && !ieee80211_is_auth(fc))
+		return RX_CONTINUE;
+
+	if (!(status->flag & RX_FLAG_DECRYPTED)) {
+		if (skb_linearize(rx->skb))
+			return RX_DROP_UNUSABLE;
+		if (rx->sta && ieee80211_wep_is_weak_iv(rx->skb, rx->key))
+			rx->sta->wep_weak_iv_count++;
+		if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key))
+			return RX_DROP_UNUSABLE;
+	} else if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
+		if (!pskb_may_pull(rx->skb, ieee80211_hdrlen(fc) + WEP_IV_LEN))
+			return RX_DROP_UNUSABLE;
+		if (rx->sta && ieee80211_wep_is_weak_iv(rx->skb, rx->key))
+			rx->sta->wep_weak_iv_count++;
+		ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
+		/* remove ICV */
+		if (pskb_trim(rx->skb, rx->skb->len - WEP_ICV_LEN))
+			return RX_DROP_UNUSABLE;
+	}
+
+	return RX_CONTINUE;
+}
+
+static int wep_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_key_conf *hw_key = info->control.hw_key;
+
+	if (!hw_key) {
+		if (ieee80211_wep_encrypt(tx->local, skb, tx->key->conf.key,
+					  tx->key->conf.keylen,
+					  tx->key->conf.keyidx))
+			return -1;
+	} else if ((hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+		   (hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
+		if (!ieee80211_wep_add_iv(tx->local, skb,
+					  tx->key->conf.keylen,
+					  tx->key->conf.keyidx))
+			return -1;
+	}
+
+	return 0;
+}
+
+ieee80211_tx_result
+ieee80211_crypto_wep_encrypt(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+
+	ieee80211_tx_set_protected(tx);
+
+	skb_queue_walk(&tx->skbs, skb) {
+		if (wep_encrypt_skb(tx, skb) < 0) {
+			I802_DEBUG_INC(tx->local->tx_handlers_drop_wep);
+			return TX_DROP;
+		}
+	}
+
+	return TX_CONTINUE;
+}
diff --git a/net/mac80211/wep.h b/net/mac80211/wep.h
new file mode 100644
index 0000000..9615749
--- /dev/null
+++ b/net/mac80211/wep.h
@@ -0,0 +1,34 @@
+/*
+ * Software WEP encryption implementation
+ * Copyright 2002, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2003, Instant802 Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef WEP_H
+#define WEP_H
+
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include "ieee80211_i.h"
+#include "key.h"
+
+int ieee80211_wep_init(struct ieee80211_local *local);
+void ieee80211_wep_free(struct ieee80211_local *local);
+int ieee80211_wep_encrypt_data(struct crypto_cipher *tfm, u8 *rc4key,
+				size_t klen, u8 *data, size_t data_len);
+int ieee80211_wep_encrypt(struct ieee80211_local *local,
+			  struct sk_buff *skb,
+			  const u8 *key, int keylen, int keyidx);
+int ieee80211_wep_decrypt_data(struct crypto_cipher *tfm, u8 *rc4key,
+			       size_t klen, u8 *data, size_t data_len);
+
+ieee80211_rx_result
+ieee80211_crypto_wep_decrypt(struct ieee80211_rx_data *rx);
+ieee80211_tx_result
+ieee80211_crypto_wep_encrypt(struct ieee80211_tx_data *tx);
+
+#endif /* WEP_H */
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
new file mode 100644
index 0000000..8f30140
--- /dev/null
+++ b/net/mac80211/wme.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright 2004, Instant802 Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/module.h>
+#include <linux/if_arp.h>
+#include <linux/types.h>
+#include <net/ip.h>
+#include <net/pkt_sched.h>
+
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "wme.h"
+
+/* Default mapping in classifier to work with default
+ * queue setup.
+ */
+const int ieee802_1d_to_ac[8] = {
+	IEEE80211_AC_BE,
+	IEEE80211_AC_BK,
+	IEEE80211_AC_BK,
+	IEEE80211_AC_BE,
+	IEEE80211_AC_VI,
+	IEEE80211_AC_VI,
+	IEEE80211_AC_VO,
+	IEEE80211_AC_VO
+};
+
+static int wme_downgrade_ac(struct sk_buff *skb)
+{
+	switch (skb->priority) {
+	case 6:
+	case 7:
+		skb->priority = 5; /* VO -> VI */
+		return 0;
+	case 4:
+	case 5:
+		skb->priority = 3; /* VI -> BE */
+		return 0;
+	case 0:
+	case 3:
+		skb->priority = 2; /* BE -> BK */
+		return 0;
+	default:
+		return -1;
+	}
+}
+
+static u16 ieee80211_downgrade_queue(struct ieee80211_sub_if_data *sdata,
+				     struct sk_buff *skb)
+{
+	/* in case we are a client verify acm is not set for this ac */
+	while (unlikely(sdata->wmm_acm & BIT(skb->priority))) {
+		if (wme_downgrade_ac(skb)) {
+			/*
+			 * This should not really happen. The AP has marked all
+			 * lower ACs to require admission control which is not
+			 * a reasonable configuration. Allow the frame to be
+			 * transmitted using AC_BK as a workaround.
+			 */
+			break;
+		}
+	}
+
+	/* look up which queue to use for frames with this 1d tag */
+	return ieee802_1d_to_ac[skb->priority];
+}
+
+/* Indicate which queue to use for this fully formed 802.11 frame */
+u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb,
+				 struct ieee80211_hdr *hdr)
+{
+	struct ieee80211_local *local = sdata->local;
+	u8 *p;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return 0;
+
+	if (!ieee80211_is_data(hdr->frame_control)) {
+		skb->priority = 7;
+		return ieee802_1d_to_ac[skb->priority];
+	}
+	if (!ieee80211_is_data_qos(hdr->frame_control)) {
+		skb->priority = 0;
+		return ieee802_1d_to_ac[skb->priority];
+	}
+
+	p = ieee80211_get_qos_ctl(hdr);
+	skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
+
+	return ieee80211_downgrade_queue(sdata, skb);
+}
+
+/* Indicate which queue to use. */
+u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
+			   struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta = NULL;
+	const u8 *ra = NULL;
+	bool qos = false;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS || skb->len < 6) {
+		skb->priority = 0; /* required for correct WPA/11i MIC */
+		return 0;
+	}
+
+	rcu_read_lock();
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP_VLAN:
+		sta = rcu_dereference(sdata->u.vlan.sta);
+		if (sta) {
+			qos = test_sta_flag(sta, WLAN_STA_WME);
+			break;
+		}
+	case NL80211_IFTYPE_AP:
+		ra = skb->data;
+		break;
+	case NL80211_IFTYPE_WDS:
+		ra = sdata->u.wds.remote_addr;
+		break;
+#ifdef CPTCFG_MAC80211_MESH
+	case NL80211_IFTYPE_MESH_POINT:
+		qos = true;
+		break;
+#endif
+	case NL80211_IFTYPE_STATION:
+		ra = sdata->u.mgd.bssid;
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		ra = skb->data;
+		break;
+	default:
+		break;
+	}
+
+	if (!sta && ra && !is_multicast_ether_addr(ra)) {
+		sta = sta_info_get(sdata, ra);
+		if (sta)
+			qos = test_sta_flag(sta, WLAN_STA_WME);
+	}
+	rcu_read_unlock();
+
+	if (!qos) {
+		skb->priority = 0; /* required for correct WPA/11i MIC */
+		return IEEE80211_AC_BE;
+	}
+
+	/* use the data classifier to determine what 802.1d tag the
+	 * data frame has */
+	skb->priority = cfg80211_classify8021d(skb);
+
+	return ieee80211_downgrade_queue(sdata, skb);
+}
+
+/**
+ * ieee80211_set_qos_hdr - Fill in the QoS header if there is one.
+ *
+ * @sdata: local subif
+ * @skb: packet to be updated
+ */
+void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
+			   struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (void *)skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	u8 *p;
+	u8 ack_policy, tid;
+
+	if (!ieee80211_is_data_qos(hdr->frame_control))
+		return;
+
+	p = ieee80211_get_qos_ctl(hdr);
+	tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
+
+	/* preserve EOSP bit */
+	ack_policy = *p & IEEE80211_QOS_CTL_EOSP;
+
+	if (is_multicast_ether_addr(hdr->addr1) ||
+	    sdata->noack_map & BIT(tid)) {
+		ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
+		info->flags |= IEEE80211_TX_CTL_NO_ACK;
+	}
+
+	/* qos header is 2 bytes */
+	*p++ = ack_policy | tid;
+	if (ieee80211_vif_is_mesh(&sdata->vif)) {
+		/* preserve RSPI and Mesh PS Level bit */
+		*p &= ((IEEE80211_QOS_CTL_RSPI |
+			IEEE80211_QOS_CTL_MESH_PS_LEVEL) >> 8);
+
+		/* Nulls don't have a mesh header (frame body) */
+		if (!ieee80211_is_qos_nullfunc(hdr->frame_control))
+			*p |= (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8);
+	} else {
+		*p = 0;
+	}
+}
diff --git a/net/mac80211/wme.h b/net/mac80211/wme.h
new file mode 100644
index 0000000..7fea4bb
--- /dev/null
+++ b/net/mac80211/wme.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _WME_H
+#define _WME_H
+
+#include <linux/netdevice.h>
+#include "ieee80211_i.h"
+
+extern const int ieee802_1d_to_ac[8];
+
+u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb,
+				 struct ieee80211_hdr *hdr);
+u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
+			   struct sk_buff *skb);
+void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
+			   struct sk_buff *skb);
+
+#endif /* _WME_H */
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
new file mode 100644
index 0000000..c7c6d64
--- /dev/null
+++ b/net/mac80211/wpa.c
@@ -0,0 +1,700 @@
+/*
+ * Copyright 2002-2004, Instant802 Networks, Inc.
+ * Copyright 2008, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/compiler.h>
+#include <linux/ieee80211.h>
+#include <linux/gfp.h>
+#include <asm/unaligned.h>
+#include <net/mac80211.h>
+#include <crypto/aes.h>
+
+#include "ieee80211_i.h"
+#include "michael.h"
+#include "tkip.h"
+#include "aes_ccm.h"
+#include "aes_cmac.h"
+#include "wpa.h"
+
+ieee80211_tx_result
+ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
+{
+	u8 *data, *key, *mic;
+	size_t data_len;
+	unsigned int hdrlen;
+	struct ieee80211_hdr *hdr;
+	struct sk_buff *skb = tx->skb;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int tail;
+
+	hdr = (struct ieee80211_hdr *)skb->data;
+	if (!tx->key || tx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
+	    skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
+		return TX_CONTINUE;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	if (skb->len < hdrlen)
+		return TX_DROP;
+
+	data = skb->data + hdrlen;
+	data_len = skb->len - hdrlen;
+
+	if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE)) {
+		/* Need to use software crypto for the test */
+		info->control.hw_key = NULL;
+	}
+
+	if (info->control.hw_key &&
+	    (info->flags & IEEE80211_TX_CTL_DONTFRAG ||
+	     tx->local->ops->set_frag_threshold) &&
+	    !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
+		/* hwaccel - with no need for SW-generated MMIC */
+		return TX_CONTINUE;
+	}
+
+	tail = MICHAEL_MIC_LEN;
+	if (!info->control.hw_key)
+		tail += TKIP_ICV_LEN;
+
+	if (WARN_ON(skb_tailroom(skb) < tail ||
+		    skb_headroom(skb) < TKIP_IV_LEN))
+		return TX_DROP;
+
+	key = &tx->key->conf.key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY];
+	mic = skb_put(skb, MICHAEL_MIC_LEN);
+	michael_mic(key, hdr, data, data_len, mic);
+	if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE))
+		mic[0]++;
+
+	return TX_CONTINUE;
+}
+
+
+ieee80211_rx_result
+ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
+{
+	u8 *data, *key = NULL;
+	size_t data_len;
+	unsigned int hdrlen;
+	u8 mic[MICHAEL_MIC_LEN];
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+
+	/*
+	 * it makes no sense to check for MIC errors on anything other
+	 * than data frames.
+	 */
+	if (!ieee80211_is_data_present(hdr->frame_control))
+		return RX_CONTINUE;
+
+	/*
+	 * No way to verify the MIC if the hardware stripped it or
+	 * the IV with the key index. In this case we have solely rely
+	 * on the driver to set RX_FLAG_MMIC_ERROR in the event of a
+	 * MIC failure report.
+	 */
+	if (status->flag & (RX_FLAG_MMIC_STRIPPED | RX_FLAG_IV_STRIPPED)) {
+		if (status->flag & RX_FLAG_MMIC_ERROR)
+			goto mic_fail_no_key;
+
+		if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key &&
+		    rx->key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
+			goto update_iv;
+
+		return RX_CONTINUE;
+	}
+
+	/*
+	 * Some hardware seems to generate Michael MIC failure reports; even
+	 * though, the frame was not encrypted with TKIP and therefore has no
+	 * MIC. Ignore the flag them to avoid triggering countermeasures.
+	 */
+	if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
+	    !(status->flag & RX_FLAG_DECRYPTED))
+		return RX_CONTINUE;
+
+	if (rx->sdata->vif.type == NL80211_IFTYPE_AP && rx->key->conf.keyidx) {
+		/*
+		 * APs with pairwise keys should never receive Michael MIC
+		 * errors for non-zero keyidx because these are reserved for
+		 * group keys and only the AP is sending real multicast
+		 * frames in the BSS. (
+		 */
+		return RX_DROP_UNUSABLE;
+	}
+
+	if (status->flag & RX_FLAG_MMIC_ERROR)
+		goto mic_fail;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	if (skb->len < hdrlen + MICHAEL_MIC_LEN)
+		return RX_DROP_UNUSABLE;
+
+	if (skb_linearize(rx->skb))
+		return RX_DROP_UNUSABLE;
+	hdr = (void *)skb->data;
+
+	data = skb->data + hdrlen;
+	data_len = skb->len - hdrlen - MICHAEL_MIC_LEN;
+	key = &rx->key->conf.key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY];
+	michael_mic(key, hdr, data, data_len, mic);
+	if (memcmp(mic, data + data_len, MICHAEL_MIC_LEN) != 0)
+		goto mic_fail;
+
+	/* remove Michael MIC from payload */
+	skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
+
+update_iv:
+	/* update IV in key information to be able to detect replays */
+	rx->key->u.tkip.rx[rx->security_idx].iv32 = rx->tkip_iv32;
+	rx->key->u.tkip.rx[rx->security_idx].iv16 = rx->tkip_iv16;
+
+	return RX_CONTINUE;
+
+mic_fail:
+	rx->key->u.tkip.mic_failures++;
+
+mic_fail_no_key:
+	/*
+	 * In some cases the key can be unset - e.g. a multicast packet, in
+	 * a driver that supports HW encryption. Send up the key idx only if
+	 * the key is set.
+	 */
+	mac80211_ev_michael_mic_failure(rx->sdata,
+					rx->key ? rx->key->conf.keyidx : -1,
+					(void *) skb->data, NULL, GFP_ATOMIC);
+	return RX_DROP_UNUSABLE;
+}
+
+
+static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_key *key = tx->key;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	unsigned int hdrlen;
+	int len, tail;
+	u8 *pos;
+
+	if (info->control.hw_key &&
+	    !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
+	    !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
+		/* hwaccel - with no need for software-generated IV */
+		return 0;
+	}
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	len = skb->len - hdrlen;
+
+	if (info->control.hw_key)
+		tail = 0;
+	else
+		tail = TKIP_ICV_LEN;
+
+	if (WARN_ON(skb_tailroom(skb) < tail ||
+		    skb_headroom(skb) < TKIP_IV_LEN))
+		return -1;
+
+	pos = skb_push(skb, TKIP_IV_LEN);
+	memmove(pos, pos + TKIP_IV_LEN, hdrlen);
+	skb_set_network_header(skb, skb_network_offset(skb) + TKIP_IV_LEN);
+	pos += hdrlen;
+
+	/* the HW only needs room for the IV, but not the actual IV */
+	if (info->control.hw_key &&
+	    (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
+		return 0;
+
+	/* Increase IV for the frame */
+	spin_lock(&key->u.tkip.txlock);
+	key->u.tkip.tx.iv16++;
+	if (key->u.tkip.tx.iv16 == 0)
+		key->u.tkip.tx.iv32++;
+	pos = ieee80211_tkip_add_iv(pos, key);
+	spin_unlock(&key->u.tkip.txlock);
+
+	/* hwaccel - with software IV */
+	if (info->control.hw_key)
+		return 0;
+
+	/* Add room for ICV */
+	skb_put(skb, TKIP_ICV_LEN);
+
+	return ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm,
+					   key, skb, pos, len);
+}
+
+
+ieee80211_tx_result
+ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+
+	ieee80211_tx_set_protected(tx);
+
+	skb_queue_walk(&tx->skbs, skb) {
+		if (tkip_encrypt_skb(tx, skb) < 0)
+			return TX_DROP;
+	}
+
+	return TX_CONTINUE;
+}
+
+
+ieee80211_rx_result
+ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
+	int hdrlen, res, hwaccel = 0;
+	struct ieee80211_key *key = rx->key;
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+	if (!ieee80211_is_data(hdr->frame_control))
+		return RX_CONTINUE;
+
+	if (!rx->sta || skb->len - hdrlen < 12)
+		return RX_DROP_UNUSABLE;
+
+	/* it may be possible to optimize this a bit more */
+	if (skb_linearize(rx->skb))
+		return RX_DROP_UNUSABLE;
+	hdr = (void *)skb->data;
+
+	/*
+	 * Let TKIP code verify IV, but skip decryption.
+	 * In the case where hardware checks the IV as well,
+	 * we don't even get here, see ieee80211_rx_h_decrypt()
+	 */
+	if (status->flag & RX_FLAG_DECRYPTED)
+		hwaccel = 1;
+
+	res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm,
+					  key, skb->data + hdrlen,
+					  skb->len - hdrlen, rx->sta->sta.addr,
+					  hdr->addr1, hwaccel, rx->security_idx,
+					  &rx->tkip_iv32,
+					  &rx->tkip_iv16);
+	if (res != TKIP_DECRYPT_OK)
+		return RX_DROP_UNUSABLE;
+
+	/* Trim ICV */
+	skb_trim(skb, skb->len - TKIP_ICV_LEN);
+
+	/* Remove IV */
+	memmove(skb->data + TKIP_IV_LEN, skb->data, hdrlen);
+	skb_pull(skb, TKIP_IV_LEN);
+
+	return RX_CONTINUE;
+}
+
+
+static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *scratch,
+				int encrypted)
+{
+	__le16 mask_fc;
+	int a4_included, mgmt;
+	u8 qos_tid;
+	u8 *b_0, *aad;
+	u16 data_len, len_a;
+	unsigned int hdrlen;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+
+	memset(scratch, 0, 6 * AES_BLOCK_SIZE);
+
+	b_0 = scratch + 3 * AES_BLOCK_SIZE;
+	aad = scratch + 4 * AES_BLOCK_SIZE;
+
+	/*
+	 * Mask FC: zero subtype b4 b5 b6 (if not mgmt)
+	 * Retry, PwrMgt, MoreData; set Protected
+	 */
+	mgmt = ieee80211_is_mgmt(hdr->frame_control);
+	mask_fc = hdr->frame_control;
+	mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
+				IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
+	if (!mgmt)
+		mask_fc &= ~cpu_to_le16(0x0070);
+	mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	len_a = hdrlen - 2;
+	a4_included = ieee80211_has_a4(hdr->frame_control);
+
+	if (ieee80211_is_data_qos(hdr->frame_control))
+		qos_tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
+	else
+		qos_tid = 0;
+
+	data_len = skb->len - hdrlen - CCMP_HDR_LEN;
+	if (encrypted)
+		data_len -= CCMP_MIC_LEN;
+
+	/* First block, b_0 */
+	b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */
+	/* Nonce: Nonce Flags | A2 | PN
+	 * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
+	 */
+	b_0[1] = qos_tid | (mgmt << 4);
+	memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
+	memcpy(&b_0[8], pn, CCMP_PN_LEN);
+	/* l(m) */
+	put_unaligned_be16(data_len, &b_0[14]);
+
+	/* AAD (extra authenticate-only data) / masked 802.11 header
+	 * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
+	put_unaligned_be16(len_a, &aad[0]);
+	put_unaligned(mask_fc, (__le16 *)&aad[2]);
+	memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
+
+	/* Mask Seq#, leave Frag# */
+	aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
+	aad[23] = 0;
+
+	if (a4_included) {
+		memcpy(&aad[24], hdr->addr4, ETH_ALEN);
+		aad[30] = qos_tid;
+		aad[31] = 0;
+	} else {
+		memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
+		aad[24] = qos_tid;
+	}
+}
+
+
+static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn, int key_id)
+{
+	hdr[0] = pn[5];
+	hdr[1] = pn[4];
+	hdr[2] = 0;
+	hdr[3] = 0x20 | (key_id << 6);
+	hdr[4] = pn[3];
+	hdr[5] = pn[2];
+	hdr[6] = pn[1];
+	hdr[7] = pn[0];
+}
+
+
+static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr)
+{
+	pn[0] = hdr[7];
+	pn[1] = hdr[6];
+	pn[2] = hdr[5];
+	pn[3] = hdr[4];
+	pn[4] = hdr[1];
+	pn[5] = hdr[0];
+}
+
+
+static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct ieee80211_key *key = tx->key;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int hdrlen, len, tail;
+	u8 *pos;
+	u8 pn[6];
+	u64 pn64;
+	u8 scratch[6 * AES_BLOCK_SIZE];
+
+	if (info->control.hw_key &&
+	    !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
+	    !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
+		/*
+		 * hwaccel has no need for preallocated room for CCMP
+		 * header or MIC fields
+		 */
+		return 0;
+	}
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+	len = skb->len - hdrlen;
+
+	if (info->control.hw_key)
+		tail = 0;
+	else
+		tail = CCMP_MIC_LEN;
+
+	if (WARN_ON(skb_tailroom(skb) < tail ||
+		    skb_headroom(skb) < CCMP_HDR_LEN))
+		return -1;
+
+	pos = skb_push(skb, CCMP_HDR_LEN);
+	memmove(pos, pos + CCMP_HDR_LEN, hdrlen);
+	skb_set_network_header(skb, skb_network_offset(skb) + CCMP_HDR_LEN);
+
+	/* the HW only needs room for the IV, but not the actual IV */
+	if (info->control.hw_key &&
+	    (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
+		return 0;
+
+	hdr = (struct ieee80211_hdr *) pos;
+	pos += hdrlen;
+
+	pn64 = atomic64_inc_return(&key->u.ccmp.tx_pn);
+
+	pn[5] = pn64;
+	pn[4] = pn64 >> 8;
+	pn[3] = pn64 >> 16;
+	pn[2] = pn64 >> 24;
+	pn[1] = pn64 >> 32;
+	pn[0] = pn64 >> 40;
+
+	ccmp_pn2hdr(pos, pn, key->conf.keyidx);
+
+	/* hwaccel - with software CCMP header */
+	if (info->control.hw_key)
+		return 0;
+
+	pos += CCMP_HDR_LEN;
+	ccmp_special_blocks(skb, pn, scratch, 0);
+	ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, scratch, pos, len,
+				  pos, skb_put(skb, CCMP_MIC_LEN));
+
+	return 0;
+}
+
+
+ieee80211_tx_result
+ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+
+	ieee80211_tx_set_protected(tx);
+
+	skb_queue_walk(&tx->skbs, skb) {
+		if (ccmp_encrypt_skb(tx, skb) < 0)
+			return TX_DROP;
+	}
+
+	return TX_CONTINUE;
+}
+
+
+ieee80211_rx_result
+ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	int hdrlen;
+	struct ieee80211_key *key = rx->key;
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	u8 pn[CCMP_PN_LEN];
+	int data_len;
+	int queue;
+
+	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+	if (!ieee80211_is_data(hdr->frame_control) &&
+	    !ieee80211_is_robust_mgmt_frame(hdr))
+		return RX_CONTINUE;
+
+	data_len = skb->len - hdrlen - CCMP_HDR_LEN - CCMP_MIC_LEN;
+	if (!rx->sta || data_len < 0)
+		return RX_DROP_UNUSABLE;
+
+	if (status->flag & RX_FLAG_DECRYPTED) {
+		if (!pskb_may_pull(rx->skb, hdrlen + CCMP_HDR_LEN))
+			return RX_DROP_UNUSABLE;
+	} else {
+		if (skb_linearize(rx->skb))
+			return RX_DROP_UNUSABLE;
+	}
+
+	ccmp_hdr2pn(pn, skb->data + hdrlen);
+
+	queue = rx->security_idx;
+
+	if (memcmp(pn, key->u.ccmp.rx_pn[queue], CCMP_PN_LEN) <= 0) {
+		key->u.ccmp.replays++;
+		return RX_DROP_UNUSABLE;
+	}
+
+	if (!(status->flag & RX_FLAG_DECRYPTED)) {
+		u8 scratch[6 * AES_BLOCK_SIZE];
+		/* hardware didn't decrypt/verify MIC */
+		ccmp_special_blocks(skb, pn, scratch, 1);
+
+		if (ieee80211_aes_ccm_decrypt(
+			    key->u.ccmp.tfm, scratch,
+			    skb->data + hdrlen + CCMP_HDR_LEN, data_len,
+			    skb->data + skb->len - CCMP_MIC_LEN,
+			    skb->data + hdrlen + CCMP_HDR_LEN))
+			return RX_DROP_UNUSABLE;
+	}
+
+	memcpy(key->u.ccmp.rx_pn[queue], pn, CCMP_PN_LEN);
+
+	/* Remove CCMP header and MIC */
+	if (pskb_trim(skb, skb->len - CCMP_MIC_LEN))
+		return RX_DROP_UNUSABLE;
+	memmove(skb->data + CCMP_HDR_LEN, skb->data, hdrlen);
+	skb_pull(skb, CCMP_HDR_LEN);
+
+	return RX_CONTINUE;
+}
+
+
+static void bip_aad(struct sk_buff *skb, u8 *aad)
+{
+	__le16 mask_fc;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+
+	/* BIP AAD: FC(masked) || A1 || A2 || A3 */
+
+	/* FC type/subtype */
+	/* Mask FC Retry, PwrMgt, MoreData flags to zero */
+	mask_fc = hdr->frame_control;
+	mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY | IEEE80211_FCTL_PM |
+				IEEE80211_FCTL_MOREDATA);
+	put_unaligned(mask_fc, (__le16 *) &aad[0]);
+	/* A1 || A2 || A3 */
+	memcpy(aad + 2, &hdr->addr1, 3 * ETH_ALEN);
+}
+
+
+static inline void bip_ipn_set64(u8 *d, u64 pn)
+{
+	*d++ = pn;
+	*d++ = pn >> 8;
+	*d++ = pn >> 16;
+	*d++ = pn >> 24;
+	*d++ = pn >> 32;
+	*d = pn >> 40;
+}
+
+static inline void bip_ipn_swap(u8 *d, const u8 *s)
+{
+	*d++ = s[5];
+	*d++ = s[4];
+	*d++ = s[3];
+	*d++ = s[2];
+	*d++ = s[1];
+	*d = s[0];
+}
+
+
+ieee80211_tx_result
+ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_key *key = tx->key;
+	struct ieee80211_mmie *mmie;
+	u8 aad[20];
+	u64 pn64;
+
+	if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
+		return TX_DROP;
+
+	skb = skb_peek(&tx->skbs);
+
+	info = IEEE80211_SKB_CB(skb);
+
+	if (info->control.hw_key)
+		return TX_CONTINUE;
+
+	if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
+		return TX_DROP;
+
+	mmie = (struct ieee80211_mmie *) skb_put(skb, sizeof(*mmie));
+	mmie->element_id = WLAN_EID_MMIE;
+	mmie->length = sizeof(*mmie) - 2;
+	mmie->key_id = cpu_to_le16(key->conf.keyidx);
+
+	/* PN = PN + 1 */
+	pn64 = atomic64_inc_return(&key->u.aes_cmac.tx_pn);
+
+	bip_ipn_set64(mmie->sequence_number, pn64);
+
+	bip_aad(skb, aad);
+
+	/*
+	 * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
+	 */
+	ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
+			   skb->data + 24, skb->len - 24, mmie->mic);
+
+	return TX_CONTINUE;
+}
+
+
+ieee80211_rx_result
+ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
+{
+	struct sk_buff *skb = rx->skb;
+	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_key *key = rx->key;
+	struct ieee80211_mmie *mmie;
+	u8 aad[20], mic[8], ipn[6];
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+
+	if (!ieee80211_is_mgmt(hdr->frame_control))
+		return RX_CONTINUE;
+
+	/* management frames are already linear */
+
+	if (skb->len < 24 + sizeof(*mmie))
+		return RX_DROP_UNUSABLE;
+
+	mmie = (struct ieee80211_mmie *)
+		(skb->data + skb->len - sizeof(*mmie));
+	if (mmie->element_id != WLAN_EID_MMIE ||
+	    mmie->length != sizeof(*mmie) - 2)
+		return RX_DROP_UNUSABLE; /* Invalid MMIE */
+
+	bip_ipn_swap(ipn, mmie->sequence_number);
+
+	if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
+		key->u.aes_cmac.replays++;
+		return RX_DROP_UNUSABLE;
+	}
+
+	if (!(status->flag & RX_FLAG_DECRYPTED)) {
+		/* hardware didn't decrypt/verify MIC */
+		bip_aad(skb, aad);
+		ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
+				   skb->data + 24, skb->len - 24, mic);
+		if (memcmp(mic, mmie->mic, sizeof(mmie->mic)) != 0) {
+			key->u.aes_cmac.icverrors++;
+			return RX_DROP_UNUSABLE;
+		}
+	}
+
+	memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
+
+	/* Remove MMIE */
+	skb_trim(skb, skb->len - sizeof(*mmie));
+
+	return RX_CONTINUE;
+}
+
+ieee80211_tx_result
+ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx)
+{
+	struct sk_buff *skb;
+	struct ieee80211_tx_info *info = NULL;
+
+	skb_queue_walk(&tx->skbs, skb) {
+		info  = IEEE80211_SKB_CB(skb);
+
+		/* handle hw-only algorithm */
+		if (!info->control.hw_key)
+			return TX_DROP;
+	}
+
+	ieee80211_tx_set_protected(tx);
+
+	return TX_CONTINUE;
+}
diff --git a/net/mac80211/wpa.h b/net/mac80211/wpa.h
new file mode 100644
index 0000000..07e33f8
--- /dev/null
+++ b/net/mac80211/wpa.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2002-2004, Instant802 Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef WPA_H
+#define WPA_H
+
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include "ieee80211_i.h"
+
+ieee80211_tx_result
+ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx);
+ieee80211_rx_result
+ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx);
+
+ieee80211_tx_result
+ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx);
+ieee80211_rx_result
+ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx);
+
+ieee80211_tx_result
+ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx);
+ieee80211_rx_result
+ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx);
+
+ieee80211_tx_result
+ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx);
+ieee80211_rx_result
+ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx);
+ieee80211_tx_result
+ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx);
+
+#endif /* WPA_H */