Use minimal scan delay upon EVENT_INTERFACE_ADDED

This patch resets the static interface_count to zero in case of
wpa_supplicant_driver_init() call for wpa_s which is in
INTERFACE_DISABLED state. This interface_count is used for the delay of
the scan which is now minimal for dynamically added interfaces. This may
collide with a scan for another interface, but the same is true for any
chosen delay in this scenario. Also the state change to DISCONNECTED is
moved to wpa_supplicant_driver_init() so it will move from
INTERFACE_DISABLED to INACTIVE when there are no enabled networks.

Tested-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>

wpa_supplicant/events.c

@@ -2311,7 +2311,6 @@ wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
 			wpa_msg(wpa_s, MSG_INFO, "Failed to initialize the "
 				"driver after interface was added");
 		}
-		wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 		break;
 	case EVENT_INTERFACE_REMOVED:
 		wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was removed");

wpa_supplicant/wpa_supplicant.c

@@ -2623,6 +2623,10 @@ int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
 	wpa_s->prev_scan_wildcard = 0;
 
 	if (wpa_supplicant_enabled_networks(wpa_s)) {
+		if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
+			wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
+			interface_count = 0;
+		}
 		if (wpa_supplicant_delayed_sched_scan(wpa_s, interface_count,
 						      100000))
 			wpa_supplicant_req_scan(wpa_s, interface_count,