mac80211: rt2x00: import upstream changes and rebase our patches

Some of our local patches have been accepted upstream. And there are
some more relevant changes (mostly for rt2800usb). Import them and
rebase our remaining local patches on top.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 61 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/020-02-rt2x00usb-do-not-anchor-rx-and-tx-urb-s.patch b/package/kernel/mac80211/patches/020-02-rt2x00usb-do-not-anchor-rx-and-tx-urb-s.patch
new file mode 100644
index 0000000000..6510b55c79
--- /dev/null
+++ b/package/kernel/mac80211/patches/020-02-rt2x00usb-do-not-anchor-rx-and-tx-urb-s.patch
@@ -0,0 +1,61 @@
+From 93c7018ec16bb83399dd4db61c361a6d6aba0d5a Mon Sep 17 00:00:00 2001
+From: Stanislaw Gruszka <sgruszka@redhat.com>
+Date: Wed, 8 Feb 2017 12:18:09 +0100
+Subject: [PATCH 02/19] rt2x00usb: do not anchor rx and tx urb's
+
+We might kill TX or RX urb during rt2x00usb_flush_entry(), what can
+cause anchor list corruption like shown below:
+
+[ 2074.035633] WARNING: CPU: 2 PID: 14480 at lib/list_debug.c:33 __list_add+0xac/0xc0
+[ 2074.035634] list_add corruption. prev->next should be next (ffff88020f362c28), but was dead000000000100. (prev=ffff8801d161bb70).
+<snip>
+[ 2074.035670] Call Trace:
+[ 2074.035672]  [<ffffffff813bde47>] dump_stack+0x63/0x8c
+[ 2074.035674]  [<ffffffff810a2231>] __warn+0xd1/0xf0
+[ 2074.035676]  [<ffffffff810a22af>] warn_slowpath_fmt+0x5f/0x80
+[ 2074.035678]  [<ffffffffa073855d>] ? rt2x00usb_register_write_lock+0x3d/0x60 [rt2800usb]
+[ 2074.035679]  [<ffffffff813dbe4c>] __list_add+0xac/0xc0
+[ 2074.035681]  [<ffffffff81591c6c>] usb_anchor_urb+0x4c/0xa0
+[ 2074.035683]  [<ffffffffa07322af>] rt2x00usb_kick_rx_entry+0xaf/0x100 [rt2x00usb]
+[ 2074.035684]  [<ffffffffa0732322>] rt2x00usb_clear_entry+0x22/0x30 [rt2x00usb]
+
+To fix do not anchor TX and RX urb's, it is not needed as during
+shutdown we kill those urbs in rt2x00usb_free_entries().
+
+Cc: Vishal Thanki <vishalthanki@gmail.com>
+Fixes: 8b4c0009313f ("rt2x00usb: Use usb anchor to manage URB")
+Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2x00usb.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+index 5a2bf9f63cd7..fe13dd07cc2a 100644
+--- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+@@ -319,10 +319,8 @@ static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data)
+ 			  entry->skb->data, length,
+ 			  rt2x00usb_interrupt_txdone, entry);
+ 
+-	usb_anchor_urb(entry_priv->urb, rt2x00dev->anchor);
+ 	status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
+ 	if (status) {
+-		usb_unanchor_urb(entry_priv->urb);
+ 		if (status == -ENODEV)
+ 			clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
+ 		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+@@ -410,10 +408,8 @@ static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data)
+ 			  entry->skb->data, entry->skb->len,
+ 			  rt2x00usb_interrupt_rxdone, entry);
+ 
+-	usb_anchor_urb(entry_priv->urb, rt2x00dev->anchor);
+ 	status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
+ 	if (status) {
+-		usb_unanchor_urb(entry_priv->urb);
+ 		if (status == -ENODEV)
+ 			clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
+ 		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+-- 
+2.12.1
+