On 07/08/2014 11:41 AM, Ian Molton wrote:
> Videobuf2 complains about buffers that are still marked ACTIVE (in use by the
> driver) following a call to stop_streaming().
>
> This patch returns all active buffers to state ERROR prior to stopping.
>
> Note: this introduces a (non fatal) race condition as the stream is not
> guaranteed to be stopped at this point.
>
> Signed-off-by: Ian Molton <ian.mol...@codethink.co.uk>
> Signed-off-by: William Towle <william.to...@codethink.co.uk>
> ---
> drivers/media/platform/soc_camera/rcar_vin.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/media/platform/soc_camera/rcar_vin.c
> b/drivers/media/platform/soc_camera/rcar_vin.c
> index 7154500..06ce705 100644
> --- a/drivers/media/platform/soc_camera/rcar_vin.c
> +++ b/drivers/media/platform/soc_camera/rcar_vin.c
> @@ -513,8 +513,14 @@ static void rcar_vin_stop_streaming(struct vb2_queue *vq)
> struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> struct rcar_vin_priv *priv = ici->priv;
> struct list_head *buf_head, *tmp;
> + int i;
>
> spin_lock_irq(&priv->lock);
> +
> + for (i = 0; i < vq->num_buffers; ++i)
> + if (vq->bufs[i]->state == VB2_BUF_STATE_ACTIVE)
> + vb2_buffer_done(vq->bufs[i], VB2_BUF_STATE_ERROR);
> +
> list_for_each_safe(buf_head, tmp, &priv->capture)
> list_del_init(buf_head);
I'm assuming all buffers that are queued to the driver via buf_queue() are
linked into priv->capture. So you would typically call vb2_buffer_done
when you are walking that list:
list_for_each_safe(buf_head, tmp, &priv->capture) {
// usually you go from buf_head to the real buffer struct
// containing a vb2_buffer struct
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
list_del_init(buf_head);
}
Please use this rather than looking into internal vb2_queue datastructures.
Regards,
Hans
> spin_unlock_irq(&priv->lock);
>
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