[PATCH] mac80211: Don't restart sta-timer if not associated.

[greearb@candelatech.com]

From: Ben Greear <greearb@candelatech.com>

I found another crash when deleting lots of virtual stations
in a congested environment.  I think the problem is that
the ieee80211_mlme_notify_scan_completed could call
ieee80211_restart_sta_timer for a non-associated interface
that was about to be deleted.

With the following patch I am unable to reproduce the
crash.

Signed-off-by: Ben Greear <greearb@candelatech.com>
---
:100644 100644 81e0619... a1cc8c4... M	net/mac80211/mlme.c
 net/mac80211/mlme.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 81e0619..a1cc8c4 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2931,6 +2931,9 @@ static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
 	u32 flags;
 
 	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+		if (unlikely(!sdata->u.mgd.associated))
+			return;
+
 		__ieee80211_stop_poll(sdata);
 
 		/* let's probe the connection once */
-- 
1.7.3.4