diff mbox series

[v14,23/56] media: pci: cx18: Stop direct calls to queue num_buffers field

Message ID 20231031163104.112469-24-benjamin.gaignard@collabora.com
State New
Headers
Series Add DELETE_BUF ioctl |

Commit Message

Benjamin Gaignard Oct. 31, 2023, 4:30 p.m. UTC 
  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>
CC: Sergey Kozlov <serjk@netup.ru>
CC: Abylay Ospan <aospan@netup.ru>
---
 drivers/media/pci/cx18/cx18-streams.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Comments

Andrzej Pietrasiewicz Nov. 9, 2023, 10:07 a.m. UTC | #1 
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>

> CC: Sergey Kozlov <serjk@netup.ru>
> CC: Abylay Ospan <aospan@netup.ru>
> ---
>   drivers/media/pci/cx18/cx18-streams.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/pci/cx18/cx18-streams.c b/drivers/media/pci/cx18/cx18-streams.c
> index 597472754c4c..cfbc4a907802 100644
> --- a/drivers/media/pci/cx18/cx18-streams.c
> +++ b/drivers/media/pci/cx18/cx18-streams.c
> @@ -104,6 +104,7 @@ static int cx18_queue_setup(struct vb2_queue *vq,
>   			    unsigned int *nbuffers, unsigned int *nplanes,
>   			    unsigned int sizes[], struct device *alloc_devs[])
>   {
> +	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
>   	struct cx18_stream *s = vb2_get_drv_priv(vq);
>   	struct cx18 *cx = s->cx;
>   	unsigned int szimage;
> @@ -121,8 +122,8 @@ static int cx18_queue_setup(struct vb2_queue *vq,
>   	 * Let's request at least three buffers: two for the
>   	 * DMA engine and one for userspace.
>   	 */
> -	if (vq->num_buffers + *nbuffers < 3)
> -		*nbuffers = 3 - vq->num_buffers;
> +	if (q_num_bufs + *nbuffers < 3)
> +		*nbuffers = 3 - q_num_bufs;
>   
>   	if (*nplanes) {
>   		if (*nplanes != 1 || sizes[0] < szimage)
diff mbox series

Patch

diff --git a/drivers/media/pci/cx18/cx18-streams.c b/drivers/media/pci/cx18/cx18-streams.c
index 597472754c4c..cfbc4a907802 100644
--- a/drivers/media/pci/cx18/cx18-streams.c
+++ b/drivers/media/pci/cx18/cx18-streams.c
@@ -104,6 +104,7 @@  static int cx18_queue_setup(struct vb2_queue *vq,
 			    unsigned int *nbuffers, unsigned int *nplanes,
 			    unsigned int sizes[], struct device *alloc_devs[])
 {
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 	struct cx18_stream *s = vb2_get_drv_priv(vq);
 	struct cx18 *cx = s->cx;
 	unsigned int szimage;
@@ -121,8 +122,8 @@  static int cx18_queue_setup(struct vb2_queue *vq,
 	 * Let's request at least three buffers: two for the
 	 * DMA engine and one for userspace.
 	 */
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
+	if (q_num_bufs + *nbuffers < 3)
+		*nbuffers = 3 - q_num_bufs;
 
 	if (*nplanes) {
 		if (*nplanes != 1 || sizes[0] < szimage)