On 06/28/2018 09:25 PM, Ezequiel Garcia wrote:
> v4l_queue_export_bufs uses the v4l_fd type when calling
> EXPBUF ioctl. However, this doesn't work on mem2mem
> where there are one capture queue and one output queue
> associated to the device.
>
> The current code calls v4l_queue_export_bufs with the
> wrong type, failing as:
>
> fail: v4l2-test-buffers.cpp(544): q_.export_bufs(node)
> test VIDIOC_EXPBUF: FAIL
>
> Fix this by using the queue type instead.
I changed this by requiring that the exp_type is provided by the caller.
Thanks for reporting this!
Regards,
Hans
>
> Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
> ---
> utils/common/v4l-helpers.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/utils/common/v4l-helpers.h b/utils/common/v4l-helpers.h
> index 83d8d7d9c073..d6866f04e23a 100644
> --- a/utils/common/v4l-helpers.h
> +++ b/utils/common/v4l-helpers.h
> @@ -1633,7 +1633,7 @@ static inline int v4l_queue_export_bufs(struct v4l_fd *f, struct v4l_queue *q,
> unsigned b, p;
> int ret = 0;
>
> - expbuf.type = exp_type ? : f->type;
> + expbuf.type = exp_type ? : q->type;
> expbuf.flags = O_RDWR;
> memset(expbuf.reserved, 0, sizeof(expbuf.reserved));
> for (b = 0; b < v4l_queue_g_buffers(q); b++) {
>
