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V4L/DVB: uvcvideo: Use POLLOUT and POLLWRNORM for output devices

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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: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2010-03-31 12:29:26 -03:00 committed by Mauro Carvalho Chehab
parent 35a00c41ea
commit ed3de6015a
1 changed files with 6 additions and 2 deletions
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8
drivers/media/video/uvc/uvc_queue.c
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@ -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)
mask |= POLLIN | POLLRDNORM;
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);