Input: Fix a warning in hid-core.

Signed-off-by: NVojtech Pavlik <vojtech@suse.cz>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

drivers/usb/input/hid-core.c

@@ -1235,7 +1235,7 @@ int hid_wait_io(struct hid_device *hid)
 
 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 {
-	usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 		HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
 		ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
 }