mac80211: fix harmless station flush warning

If an interface is set down while authenticating or
associating, there's a station entry that will be
removed by the flushing in do_stop() and that will
cause a warning. It's otherwise harmless, but avoid
the warning by calling ieee80211_mgd_stop() first.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/iface.c

@@ -696,6 +696,9 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 
 	ieee80211_roc_purge(sdata);
 
+	if (sdata->vif.type == NL80211_IFTYPE_STATION)
+		ieee80211_mgd_stop(sdata);
+
 	/*
 	 * Remove all stations associated with this interface.
 	 *
@@ -783,8 +786,6 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 			}
 		}
 		spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
-	} else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
-		ieee80211_mgd_stop(sdata);
 	}
 
 	if (going_down)