Disable interface if ACS fails

In case of Automatic Channel Selection (ACS) failure, we do not have a
real fallback path. Interface still remains in ACS state. To reflect we
did not succeed with ACS, simply disable the interface and indicate this
to user/upper layer entity so that a suitable recovery or error
notification can be performed.

Signed-off-by: Pawel Kulakowski <pawel.kulakowski@tieto.com>

src/ap/acs.c

@@ -284,6 +284,7 @@ static void acs_fail(struct hostapd_iface *iface)
 {
 	wpa_printf(MSG_ERROR, "ACS: Failed to start");
 	acs_cleanup(iface);
+	hostapd_disable_iface(iface);
 }