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

Benjamin Gaignard
2023-10-31T16:39:00Z

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>
---
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;
--
2.39.2