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| author | Ricardo Ribalda <ricardo.ribalda@gmail.com> | 2014-01-08 05:01:33 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-02-04 06:30:21 -0200 |
| commit | 548df7831adc34eca3ccefa29f768cef84315d6e (patch) | |
| tree | b08569613739558ead89bffdb095aeef41687a2a /drivers/media | |
| parent | cca36e2eecec2b8fc869a50ffd3bd0adeed92b8b (diff) | |
| download | linux-548df7831adc34eca3ccefa29f768cef84315d6e.tar.bz2 | |
[media] vb2: Check if there are buffers before streamon
This patch adds a test preventing streamon() if there is no buffer
ready.
Without this patch, a user could call streamon() before
preparing any buffer. This leads to a situation where if he calls
close() before calling streamoff() the device is kept streaming.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 5a5fb7f09b7b..a127925c9d61 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -1776,6 +1776,11 @@ static int vb2_internal_streamon(struct vb2_queue *q, enum v4l2_buf_type type) return 0; } + if (!q->num_buffers) { + dprintk(1, "streamon: no buffers have been allocated\n"); + return -EINVAL; + } + /* * If any buffers were queued before streamon, * we can now pass them to driver for processing. |