[PATCH v7 04/49] media: amphion: Use vb2_get_buffer() instead of directly access to buffers array

Benjamin Gaignard
2023-09-14T13:33:41Z

Use vb2_get_buffer() instead of directly access to vb2_buffer buffer array.
This could allow to change the type bufs[] field of vb2_buffer structure if
needed.
After each call to vb2_get_buffer() we need to be sure that we get
a valid pointer so check the return value of all of them.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
drivers/media/platform/amphion/vpu_dbg.c | 22 ++++++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/amphion/vpu_dbg.c b/drivers/media/platform/amphion/vpu_dbg.c
index 982c2c777484..a462d6fe4ea9 100644
--- a/drivers/media/platform/amphion/vpu_dbg.c
+++ b/drivers/media/platform/amphion/vpu_dbg.c
@@ -140,11 +140,18 @@ static int vpu_dbg_instance(struct seq_file *s, void *data)

vq = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx);
for (i = 0; i < vq->num_buffers; i++) {
- struct vb2_buffer *vb = vq->bufs[i];
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct vb2_buffer *vb;
+ struct vb2_v4l2_buffer *vbuf;
+
+ vb = vb2_get_buffer(vq, i);
+ if (!vb)
+ continue;

if (vb->state == VB2_BUF_STATE_DEQUEUED)
continue;
+
+ vbuf = to_vb2_v4l2_buffer(vb);
+
num = scnprintf(str, sizeof(str),
"output [%2d] state = %10s, %8s\n",
i, vb2_stat_name[vb->state],
@@ -155,11 +162,18 @@ static int vpu_dbg_instance(struct seq_file *s, void *data)

vq = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
for (i = 0; i < vq->num_buffers; i++) {
- struct vb2_buffer *vb = vq->bufs[i];
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct vb2_buffer *vb;
+ struct vb2_v4l2_buffer *vbuf;
+
+ vb = vb2_get_buffer(vq, i);
+ if (!vb)
+ continue;

if (vb->state == VB2_BUF_STATE_DEQUEUED)
continue;
+
+ vbuf = to_vb2_v4l2_buffer(vb);
+
num = scnprintf(str, sizeof(str),
"capture[%2d] state = %10s, %8s\n",
i, vb2_stat_name[vb->state],
--
2.39.2