Input: xpad - re-send LED command on present event

The controller only receives commands when its present. So for the
correct LED to be lit the LED command has to be sent on the present
event.
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/joystick/xpad.c

@@ -344,6 +344,7 @@ struct usb_xpad {
 
 	int mapping;			/* map d-pad to buttons or to axes */
 	int xtype;			/* type of xbox device */
+	unsigned long led_no;		/* led to lit on xbox360 controllers */
 };
 
 /*
@@ -488,6 +489,8 @@ static void xpad360_process_packet(struct usb_xpad *xpad,
 	input_sync(dev);
 }
 
+static void xpad_identify_controller(struct usb_xpad *xpad);
+
 /*
  * xpad360w_process_packet
  *
@@ -510,6 +513,11 @@ static void xpad360w_process_packet(struct usb_xpad *xpad, u16 cmd, unsigned cha
 		if (data[1] & 0x80) {
 			xpad->pad_present = 1;
 			usb_submit_urb(xpad->bulk_out, GFP_ATOMIC);
+			/*
+			 * Light up the segment corresponding to
+			 * controller number.
+			 */
+			xpad_identify_controller(xpad);
 		} else
 			xpad->pad_present = 0;
 	}
@@ -934,6 +942,12 @@ static void xpad_send_led_command(struct usb_xpad *xpad, int command)
 	mutex_unlock(&xpad->odata_mutex);
 }
 
+static void xpad_identify_controller(struct usb_xpad *xpad)
+{
+	/* Light up the segment corresponding to controller number */
+	xpad_send_led_command(xpad, (xpad->led_no % 4) + 2);
+}
+
 static void xpad_led_set(struct led_classdev *led_cdev,
 			 enum led_brightness value)
 {
@@ -945,8 +959,7 @@ static void xpad_led_set(struct led_classdev *led_cdev,
 
 static int xpad_led_probe(struct usb_xpad *xpad)
 {
-	static atomic_t led_seq	= ATOMIC_INIT(-1);
-	unsigned long led_no;
+	static atomic_t led_seq = ATOMIC_INIT(-1);
 	struct xpad_led *led;
 	struct led_classdev *led_cdev;
 	int error;
@@ -958,9 +971,9 @@ static int xpad_led_probe(struct usb_xpad *xpad)
 	if (!led)
 		return -ENOMEM;
 
-	led_no = atomic_inc_return(&led_seq);
+	xpad->led_no = atomic_inc_return(&led_seq);
 
-	snprintf(led->name, sizeof(led->name), "xpad%lu", led_no);
+	snprintf(led->name, sizeof(led->name), "xpad%lu", xpad->led_no);
 	led->xpad = xpad;
 
 	led_cdev = &led->led_cdev;
@@ -974,10 +987,8 @@ static int xpad_led_probe(struct usb_xpad *xpad)
 		return error;
 	}
 
-	/*
-	 * Light up the segment corresponding to controller number
-	 */
-	xpad_send_led_command(xpad, (led_no % 4) + 2);
+	/* Light up the segment corresponding to controller number */
+	xpad_identify_controller(xpad);
 
 	return 0;
 }
@@ -994,6 +1005,7 @@ static void xpad_led_disconnect(struct usb_xpad *xpad)
 #else
 static int xpad_led_probe(struct usb_xpad *xpad) { return 0; }
 static void xpad_led_disconnect(struct usb_xpad *xpad) { }
+static void xpad_identify_controller(struct usb_xpad *xpad) { }
 #endif