From: Stanislaw Gruszka <sgruszka@redhat.com>
Date: Wed, 28 Mar 2012 14:01:20 +0000 (+0200)
Subject: mac80211: protect ->scanning by mutex in ieee80211_work_work()
X-Git-Tag: upstream/snapshot3+hdmi~7403^2~410^2~77
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5f5460706e5feaef286aacce37647f7e57d026e4;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

mac80211: protect ->scanning by mutex in ieee80211_work_work()

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/work.c b/net/mac80211/work.c
index 1f74af3..b2650a9 100644
--- a/net/mac80211/work.c
+++ b/net/mac80211/work.c
@@ -122,9 +122,6 @@ static void ieee80211_work_work(struct work_struct *work)
 	enum work_action rma;
 	bool remain_off_channel = false;
 
-	if (local->scanning)
-		return;
-
 	/*
 	 * ieee80211_queue_work() should have picked up most cases,
 	 * here we'll pick the rest.
@@ -134,6 +131,11 @@ static void ieee80211_work_work(struct work_struct *work)
 
 	mutex_lock(&local->mtx);
 
+	if (local->scanning) {
+		mutex_unlock(&local->mtx);
+		return;
+	}
+
 	ieee80211_recalc_idle(local);
 
 	list_for_each_entry_safe(wk, tmp, &local->work_list, list) {