Re: [PATCH v14 42/56] media: usb: usbtv: Stop direct calls to queue num_buffers field

Andrzej Pietrasiewicz
2023-11-09T11:37:20Z

W dniu 31.10.2023 o 17:30, Benjamin Gaignard pisze:
> Use vb2_get_num_buffers() to avoid using queue num_buffers field directly.
> This allows us to change how the number of buffers is computed in the
> future.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>

Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>

> ---
> drivers/media/usb/usbtv/usbtv-video.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c
> index 1e30e05953dc..62a583040cd4 100644
> --- a/drivers/media/usb/usbtv/usbtv-video.c
> +++ b/drivers/media/usb/usbtv/usbtv-video.c
> @@ -726,9 +726,10 @@ static int usbtv_queue_setup(struct vb2_queue *vq,
> {
> struct usbtv *usbtv = vb2_get_drv_priv(vq);
> unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
> + unsigned int q_num_bufs = vb2_get_num_buffers(vq);
>
> - if (vq->num_buffers + *nbuffers < 2)
> - *nbuffers = 2 - vq->num_buffers;
> + if (q_num_bufs + *nbuffers < 2)
> + *nbuffers = 2 - q_num_bufs;
> if (*nplanes)
> return sizes[0] < size ? -EINVAL : 0;
> *nplanes = 1;