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 fc968c8..c044355 100644 (file)
--- 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