mac80211: fix a race condition when bringing up wds sta interfaces on the ap

SVN-Revision: 18377

package/mac80211/patches/520-nl80211_vlan_add_fix.patch

@@ -0,0 +1,20 @@
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -1813,7 +1813,7 @@ static int nl80211_get_station(struct sk
+ }
+ 
+ /*
+- * Get vlan interface making sure it is on the right wiphy.
++ * Get vlan interface making sure it is running and on the right wiphy.
+  */
+ static int get_vlan(struct genl_info *info,
+ 		    struct cfg80211_registered_device *rdev,
+@@ -1831,6 +1831,8 @@ static int get_vlan(struct genl_info *in
+ 			return -EINVAL;
+ 		if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
+ 			return -EINVAL;
++		if (!netif_running(*vlan))
++			return -ENETDOWN;
+ 	}
+ 	return 0;
+ }