From: Pawel Osciak <p.osciak@xxxxxxxxxxx>
Streamon should return -EINVAL if called on an output device and no
buffers are queued.
Signed-off-by: Pawel Osciak <p.osciak@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
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
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