From: Laurent Pinchart Date: Wed, 31 Mar 2010 15:29:26 +0000 (-0300) Subject: V4L/DVB: uvcvideo: Use POLLOUT and POLLWRNORM for output devices X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ed3de6015a920c131fbcc770fb95097fde592d86;p=linux-beck.git 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: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c index 4a925a31b0e0..133c78d113ac 100644 --- a/drivers/media/video/uvc/uvc_queue.c +++ b/drivers/media/video/uvc/uvc_queue.c @@ -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);