From: Barak Bercovitz <barak@wizery.com>
Date: Thu, 5 Dec 2013 09:21:26 +0000 (+0200)
Subject: cfg80211: stop sched scan only when needed
X-Git-Tag: next-20131220~59^2~78
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=24d584d70e478bf2e815135e8bf60f72685046f7;p=karo-tx-linux.git

cfg80211: stop sched scan only when needed

cfg80211_leave stops sched scan when any station vif
is leaving. Add an explicit check and call it only
when the relevant vif (the one we scan on) is leaving.

Signed-off-by: Barak Bercovitz <barak@wizery.com>
[Eliad - changed the commit message a bit]
Signed-off-by: Eliad Peller <eliad@wizery.com>
[Johannes - add ASSERT_RTNL since that protects the pointer]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/wireless/core.c b/net/wireless/core.c
index fc968c861ee4..c0443558b7bf 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -756,13 +756,16 @@ void cfg80211_leave(struct cfg80211_registered_device *rdev,
 {
 	struct net_device *dev = wdev->netdev;
 
+	ASSERT_RTNL();
+
 	switch (wdev->iftype) {
 	case NL80211_IFTYPE_ADHOC:
 		cfg80211_leave_ibss(rdev, dev, true);
 		break;
 	case NL80211_IFTYPE_P2P_CLIENT:
 	case NL80211_IFTYPE_STATION:
-		__cfg80211_stop_sched_scan(rdev, false);
+		if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
+			__cfg80211_stop_sched_scan(rdev, false);
 
 		wdev_lock(wdev);
 #ifdef CONFIG_CFG80211_WEXT