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Subject: media: pci: cx18: Stop direct calls to queue num_buffers field
Author: Benjamin Gaignard <benjamin.gaign...@collabora.com>
Date: Thu Nov 9 17:34:39 2023 +0100
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.gaign...@collabora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrze...@collabora.com>
CC: Sergey Kozlov <se...@netup.ru>
CC: Abylay Ospan <aos...@netup.ru>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mche...@kernel.org>
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)
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