Re: [PATCH v14 40/56] media: usb: cx231xx: Stop direct calls to queue num_buffers field

[Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>]

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@xxxxxxxxxxxxx>

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

> ---
>   drivers/media/usb/cx231xx/cx231xx-417.c   | 5 +++--
>   drivers/media/usb/cx231xx/cx231xx-video.c | 5 +++--
>   2 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/usb/cx231xx/cx231xx-417.c b/drivers/media/usb/cx231xx/cx231xx-417.c
> index fe4410a5e128..45973fe690b2 100644
> --- a/drivers/media/usb/cx231xx/cx231xx-417.c
> +++ b/drivers/media/usb/cx231xx/cx231xx-417.c
> @@ -1218,12 +1218,13 @@ static int queue_setup(struct vb2_queue *vq,
>   {
>   	struct cx231xx *dev = vb2_get_drv_priv(vq);
>   	unsigned int size = mpeglinesize * mpeglines;
> +	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
>   
>   	dev->ts1.ts_packet_size  = mpeglinesize;
>   	dev->ts1.ts_packet_count = mpeglines;
>   
> -	if (vq->num_buffers + *nbuffers < CX231XX_MIN_BUF)
> -		*nbuffers = CX231XX_MIN_BUF - vq->num_buffers;
> +	if (q_num_bufs + *nbuffers < CX231XX_MIN_BUF)
> +		*nbuffers = CX231XX_MIN_BUF - q_num_bufs;
>   
>   	if (*nplanes)
>   		return sizes[0] < size ? -EINVAL : 0;
> diff --git a/drivers/media/usb/cx231xx/cx231xx-video.c b/drivers/media/usb/cx231xx/cx231xx-video.c
> index e23b8ccd79d4..c8eb4222319d 100644
> --- a/drivers/media/usb/cx231xx/cx231xx-video.c
> +++ b/drivers/media/usb/cx231xx/cx231xx-video.c
> @@ -714,11 +714,12 @@ static int queue_setup(struct vb2_queue *vq,
>   		       unsigned int sizes[], struct device *alloc_devs[])
>   {
>   	struct cx231xx *dev = vb2_get_drv_priv(vq);
> +	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
>   
>   	dev->size = (dev->width * dev->height * dev->format->depth + 7) >> 3;
>   
> -	if (vq->num_buffers + *nbuffers < CX231XX_MIN_BUF)
> -		*nbuffers = CX231XX_MIN_BUF - vq->num_buffers;
> +	if (q_num_bufs + *nbuffers < CX231XX_MIN_BUF)
> +		*nbuffers = CX231XX_MIN_BUF - q_num_bufs;
>   
>   	if (*nplanes)
>   		return sizes[0] < dev->size ? -EINVAL : 0;