mac80211: backport some upstream fixes

Backports the following upstream fixes:

mac80211: initialize fast-xmit 'info' later
mac80211: fix legacy and invalid rx-rate report
mac80211: fix tid_agg_rx NULL dereference

Compiled and tested on: cns3xxx

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/349-mac80211-fix-legacy-invalid-rxrate.patch b/package/kernel/mac80211/patches/349-mac80211-fix-legacy-invalid-rxrate.patch
new file mode 100644
index 0000000000..c160515892
--- /dev/null
+++ b/package/kernel/mac80211/patches/349-mac80211-fix-legacy-invalid-rxrate.patch
@@ -0,0 +1,60 @@
+From a17d93ff3a950fefaea40e4a4bf3669b9137c533 Mon Sep 17 00:00:00 2001
+From: Ben Greear <greearb@candelatech.com>
+Date: Wed, 14 Dec 2016 11:30:38 -0800
+Subject: [PATCH] mac80211: fix legacy and invalid rx-rate report
+
+This fixes obtaining the rate info via sta_set_sinfo
+when the rx rate is invalid (for instance, on IBSS
+interface that has received no frames from one of its
+peers).
+
+Also initialize rinfo->flags for legacy rates, to not
+rely on the whole sinfo being initialized to zero.
+
+Signed-off-by: Ben Greear <greearb@candelatech.com>
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+ net/mac80211/sta_info.c | 14 ++++++++------
+ 1 file changed, 8 insertions(+), 6 deletions(-)
+
+--- a/net/mac80211/sta_info.c
++++ b/net/mac80211/sta_info.c
+@@ -1975,6 +1975,7 @@ static void sta_stats_decode_rate(struct
+ 		u16 brate;
+ 		unsigned int shift;
+ 
++		rinfo->flags = 0;
+ 		sband = local->hw.wiphy->bands[(rate >> 4) & 0xf];
+ 		brate = sband->bitrates[rate & 0xf].bitrate;
+ 		if (rinfo->bw == RATE_INFO_BW_5)
+@@ -1990,14 +1991,15 @@ static void sta_stats_decode_rate(struct
+ 		rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
+ }
+ 
+-static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
++static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
+ {
+ 	u16 rate = ACCESS_ONCE(sta_get_last_rx_stats(sta)->last_rate);
+ 
+ 	if (rate == STA_STATS_RATE_INVALID)
+-		rinfo->flags = 0;
+-	else
+-		sta_stats_decode_rate(sta->local, rate, rinfo);
++		return -EINVAL;
++
++	sta_stats_decode_rate(sta->local, rate, rinfo);
++	return 0;
+ }
+ 
+ static void sta_set_tidstats(struct sta_info *sta,
+@@ -2202,8 +2204,8 @@ void sta_set_sinfo(struct sta_info *sta,
+ 	}
+ 
+ 	if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
+-		sta_set_rate_info_rx(sta, &sinfo->rxrate);
+-		sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
++		if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
++			sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
+ 	}
+ 
+ 	sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);