cfg80211: respect iface combinations when starting operation

devlist_mtx locking is changed to accomodate changes.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/wireless/core.c b/net/wireless/core.c
index b26695ad3e97..ca2b95f24846 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -990,7 +990,9 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
                         return notifier_from_errno(-EOPNOTSUPP);
                 if (rfkill_blocked(rdev->rfkill))
                         return notifier_from_errno(-ERFKILL);
+                mutex_lock(&rdev->devlist_mtx);
                 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
+                mutex_unlock(&rdev->devlist_mtx);
                 if (ret)
                         return notifier_from_errno(ret);
                 cfg80211_lock_rdev(rdev);