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>

1 files changed, 4 insertions, 1 deletions

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