From 987c285c2ae2e4e32aca3a9b3252d28171c75711 Mon Sep 17 00:00:00 2001
From: Arik Nemtsov <arik@wizery.com>
Date: Mon, 5 Nov 2012 10:27:52 +0200
Subject: [PATCH] mac80211: sync acccess to tx_filtered/ps_tx_buf queues

These are accessed without a lock when ending STA PSM. If the
sta_cleanup timer accesses these lists at the same time, we might crash.

This may fix some mysterious crashes we had during
ieee80211_sta_ps_deliver_wakeup.

Cc: stable@vger.kernel.org
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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