From: Pawel Osciak <[email protected]> Streamon should return -EINVAL if called on an output device and no buffers are queued.
Signed-off-by: Pawel Osciak <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> Signed-off-by: Marek Szyprowski <[email protected]> --- drivers/media/video/videobuf-core.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c index ce1595b..2cdf8ed 100644 --- a/drivers/media/video/videobuf-core.c +++ b/drivers/media/video/videobuf-core.c @@ -725,6 +725,17 @@ int videobuf_streamon(struct videobuf_queue *q) int retval; mutex_lock(&q->vb_lock); + + if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT + || q->type == V4L2_BUF_TYPE_VBI_OUTPUT + || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) { + if (list_empty(&q->stream)) { + dprintk(1, "streamon: no output buffers queued\n"); + retval = -EINVAL; + goto done; + } + } + retval = -EBUSY; if (q->reading) goto done; -- 1.7.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
