cfg80211: fix P2P-Device stop locking

cfg80211_stop_p2p_device() requires the devlist_mtx to
be held, but nl80211_stop_p2p_device() doesn't acquire
it which is a locking error and causes a warning (when
lockdep is enabled). Fix this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 212d2aa..3abcbba 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -8159,9 +8159,11 @@ static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
        if (!rdev->ops->stop_p2p_device)
                return -EOPNOTSUPP;
 
+       mutex_lock(&rdev->devlist_mtx);
        mutex_lock(&rdev->sched_scan_mtx);
        cfg80211_stop_p2p_device(rdev, wdev);
        mutex_unlock(&rdev->sched_scan_mtx);
+       mutex_unlock(&rdev->devlist_mtx);
 
        return 0;
 }