[PATCH v3 03/11] media: videobuf2: Remove VB2_MAX_FRAME limit on buffer storage

Benjamin Gaignard
2023-06-22T13:14:10Z

Remove VB2_MAX_FRAME buffer limit since Xarray allows to store
more than that.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
drivers/media/common/videobuf2/videobuf2-core.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index f1ff7af34a9f..86e1e926fa45 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -455,9 +455,9 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
struct vb2_buffer *vb;
int ret;

- /* Ensure that q->num_buffers+num_buffers is below VB2_MAX_FRAME */
+ /* Ensure that q->num_buffers + num_buffers is UINT_MAX */
num_buffers = min_t(unsigned int, num_buffers,
- VB2_MAX_FRAME - q->num_buffers);
+ UINT_MAX - q->num_buffers);

for (buffer = 0; buffer < num_buffers; ++buffer) {
/* Allocate vb2 buffer structures */
@@ -858,9 +858,9 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
/*
* Make sure the requested values and current defaults are sane.
*/
- WARN_ON(q->min_buffers_needed > VB2_MAX_FRAME);
+ WARN_ON(q->min_buffers_needed > UINT_MAX);
num_buffers = max_t(unsigned int, *count, q->min_buffers_needed);
- num_buffers = min_t(unsigned int, num_buffers, VB2_MAX_FRAME);
+ num_buffers = min_t(unsigned int, num_buffers, UINT_MAX);
memset(q->alloc_devs, 0, sizeof(q->alloc_devs));
/*
* Set this now to ensure that drivers see the correct q->memory value
@@ -976,11 +976,6 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
bool no_previous_buffers = !q->num_buffers;
int ret;

- if (q->num_buffers == VB2_MAX_FRAME) {
- dprintk(q, 1, "maximum number of buffers already allocated\n");
- return -ENOBUFS;
- }
-
if (no_previous_buffers) {
if (q->waiting_in_dqbuf && *count) {
dprintk(q, 1, "another dup()ped fd is waiting for a buffer\n");
@@ -1005,7 +1000,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
return -EINVAL;
}

- num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers);
+ num_buffers = min(*count, UINT_MAX - q->num_buffers);

if (requested_planes && requested_sizes) {
num_planes = requested_planes;
--
2.39.2