Commit ed3de601 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
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V4L/DVB: uvcvideo: Use POLLOUT and POLLWRNORM for output devices 



The V4L2 specification requires drivers to use the write events in the
file operations poll handler for output devices. The uvcvideo driver
erroneously used read events for all devices. Fix this.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 35a00c41

drivers/media/video/uvc/uvc_queue.c

+6 −2
Original line number Diff line number Diff line
@@ -388,8 +388,12 @@ unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, 


	poll_wait(file, &buf->wait, wait);

	if (buf->state == UVC_BUF_STATE_DONE ||

	    buf->state == UVC_BUF_STATE_ERROR)

	    buf->state == UVC_BUF_STATE_ERROR) {

		if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)

			mask |= POLLIN | POLLRDNORM;

		else

			mask |= POLLOUT | POLLWRNORM;

	}



done:

	mutex_unlock(&queue->mutex);