Thread (98 messages) 98 messages, 3 authors, 2023-09-21

Re: [PATCH v7 06/49] media: mediatek: vdec: Use vb2_get_buffer() instead of directly access to buffers array

From: Hans Verkuil <hidden>
Date: 2023-09-19 09:37:41
Also in: linux-arm-msm, linux-media, linux-mediatek, linux-rockchip, linux-staging, lkml

On 14/09/2023 15:32, Benjamin Gaignard wrote:
quoted hunk ↗ jump to hunk
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>
---
 .../platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
index e393e3e668f8..3d2ae0e1b5b6 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
@@ -1696,7 +1696,7 @@ static int vdec_vp9_slice_setup_core_buffer(struct vdec_vp9_slice_instance *inst
 
 	/* update internal buffer's width/height */
 	for (i = 0; i < vq->num_buffers; i++) {
-		if (vb == vq->bufs[i]) {
+		if (vb == vb2_get_buffer(vq, i)) {
The original code here is silly...
 			instance->dpb[i].width = w;
 			instance->dpb[i].height = h;
 			break;
...This can just be changed to:

	instance->dpb[vb->index].width = w;
	instance->dpb[vb->index].height = h;

No need to loop.

Regards,

	Hans

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