nl80211: Fix br_ifindex storing when hostapd creates the bridge

Commit 6c6678e7a456d4af58a2bf24ec8f15fb8b8b24ef ('nl80211: Make
br_ifindex available in i802_bss') did not cover the case where
i802_check_bridge() ends up creating the bridge interface. That left
bss->br_ifindex zero and prevented neighbor addition. Extend that
functionality to update br_ifindex once the bridge netdev has been
added.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/drivers/driver_nl80211.c

@@ -6341,7 +6341,6 @@ static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
 
 	os_strlcpy(bss->brname, brname, IFNAMSIZ);
 	br_ifindex = if_nametoindex(brname);
-	bss->br_ifindex = br_ifindex;
 	if (br_ifindex == 0) {
 		/*
 		 * Bridge was configured, but the bridge device does
@@ -6354,8 +6353,10 @@ static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
 			return -1;
 		}
 		bss->added_bridge = 1;
-		add_ifidx(drv, if_nametoindex(brname));
+		br_ifindex = if_nametoindex(brname);
+		add_ifidx(drv, br_ifindex);
 	}
+	bss->br_ifindex = br_ifindex;
 
 	if (linux_br_get(in_br, ifname) == 0) {
 		if (os_strcmp(in_br, brname) == 0)