nl80211: Ignore ifdown event if mode change triggered it

When driver_nl80211.c has to set the netdev down to change iftype, an
RTM_NEWLINK event is generated. Do not generate
EVENT_INTERFACE_DISABLED event based on that.

src/drivers/driver_nl80211.c

@@ -129,6 +129,7 @@ struct wpa_driver_nl80211_data {
 	int ifindex;
 	int if_removed;
 	int if_disabled;
+	int ignore_if_down_event;
 	struct rfkill_data *rfkill;
 	struct wpa_driver_capa capa;
 	int has_capability;
@@ -486,8 +487,15 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 
 	if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 		wpa_printf(MSG_DEBUG, "nl80211: Interface down");
-		drv->if_disabled = 1;
-		wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
+		if (drv->ignore_if_down_event) {
+			wpa_printf(MSG_DEBUG, "nl80211: Ignore interface down "
+				   "event generated by mode change");
+			drv->ignore_if_down_event = 0;
+		} else {
+			drv->if_disabled = 1;
+			wpa_supplicant_event(drv->ctx,
+					     EVENT_INTERFACE_DISABLED, NULL);
+		}
 	}
 
 	if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
@@ -5051,6 +5059,7 @@ static int wpa_driver_nl80211_set_mode(void *priv, int mode)
 		wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
 			   "interface is down");
 		drv->nlmode = nlmode;
+		drv->ignore_if_down_event = 1;
 	}
 
 done: