uvc_queue_poll   1451 drivers/media/usb/uvc/uvc_v4l2.c 	return uvc_queue_poll(&stream->queue, file, wait);
uvc_queue_poll    772 drivers/media/usb/uvc/uvcvideo.h __poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,