media: imon: fix timer racing disconnect

The timer will report events for an input device.
Reporting events for an unregistered device is bad.
Hence the timer must be killed first.
Signed-off-by: NOliver Neukum <oneukum@suse.com>
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/rc/imon.c

@@ -2537,8 +2537,8 @@ static void imon_disconnect(struct usb_interface *interface)
 		usb_kill_urb(ictx->rx_urb_intf1);
 		usb_put_dev(ictx->usbdev_intf1);
 		if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
-			input_unregister_device(ictx->touch);
 			del_timer_sync(&ictx->ttimer);
+			input_unregister_device(ictx->touch);
 		}
 	}