Index: hostapd-2021-02-20-59e9794c/src/ap/vlan_init.c
===================================================================
--- hostapd-2021-02-20-59e9794c.orig/src/ap/vlan_init.c
+++ hostapd-2021-02-20-59e9794c/src/ap/vlan_init.c
@@ -37,7 +37,14 @@ static int vlan_if_add(struct hostapd_da
 	}
 #endif /* CONFIG_WEP */
 
-	if (!vlan_exists)
+	if (!hapd->driver || !hapd->driver->if_add) {
+		char *dot = strstr(vlan->ifname, ".");
+		if (dot)
+			*dot = '\0';
+		ret = 0;
+	}
+	
+	else if (!vlan_exists)
 		ret = hostapd_vlan_if_add(hapd, vlan->ifname);
 	else if (!existsok)
 		return -1;
Index: hostapd-2021-02-20-59e9794c/src/ap/vlan_init.c
===================================================================
--- hostapd-2021-02-20-59e9794c.orig/src/ap/vlan_init.c
+++ hostapd-2021-02-20-59e9794c/src/ap/vlan_init.c
@@ -59,7 +59,7 @@ static int vlan_if_add(struct hostapd_da
 	if (hapd->wpa_auth)
 		ret = wpa_auth_ensure_group(hapd->wpa_auth, vlan->vlan_id);
 
-	if (!ret && !vlan_exists)
+	if (!ret && !vlan_exists && hapd->driver->if_add)
 		hostapd_ubus_add_vlan(hapd, vlan);
 
 	if (ret == 0)