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media: usb: usbtv: Stop direct calls to queue num_buffers field

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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>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Benjamin Gaignard 2023-11-09 17:34:58 +01:00 committed by Mauro Carvalho Chehab
parent 7e17d44d61
commit 4545ca51dd
1 changed files with 3 additions and 2 deletions
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5
drivers/media/usb/usbtv/usbtv-video.c
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@ -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;