diff options
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-video.c')
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-video.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c index 68068c6d098..66bbd2e7110 100644 --- a/drivers/media/video/cx23885/cx23885-video.c +++ b/drivers/media/video/cx23885/cx23885-video.c @@ -796,6 +796,7 @@ static unsigned int video_poll(struct file *file, { struct cx23885_fh *fh = file->private_data; struct cx23885_buffer *buf; + unsigned int rc = POLLERR; if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) { if (!res_get(fh->dev, fh, RESOURCE_VBI)) @@ -803,23 +804,28 @@ static unsigned int video_poll(struct file *file, return videobuf_poll_stream(file, &fh->vbiq, wait); } + mutex_lock(&fh->vidq.vb_lock); if (res_check(fh, RESOURCE_VIDEO)) { /* streaming capture */ if (list_empty(&fh->vidq.stream)) - return POLLERR; + goto done; buf = list_entry(fh->vidq.stream.next, struct cx23885_buffer, vb.stream); } else { /* read() capture */ buf = (struct cx23885_buffer *)fh->vidq.read_buf; if (NULL == buf) - return POLLERR; + goto done; } poll_wait(file, &buf->vb.done, wait); if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) - return POLLIN|POLLRDNORM; - return 0; + rc = POLLIN|POLLRDNORM; + else + rc = 0; +done: + mutex_unlock(&fh->vidq.vb_lock); + return rc; } static int video_release(struct file *file) |