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SubjectRe: [PATCH] media: mtk-vcodec: fix access to incorrect planes member
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On Tue, 2019-03-26 at 16:44 +0900, Alexandre Courbot wrote:
> Commit 0650a91499e0 ("media: mtk-vcodec: Correct return type for mem2mem
> buffer helpers") fixed the return types for mem2mem buffer helper
> functions by changing a few local variables from vb2_buffer to
> vb2_v4l2_buffer. However, it left a few accesses to vb2_buffer::planes
> as-is, accidentally turning them into accesses to
> vb2_v4l2_buffer::planes and resulting in values being read from/written
> to the wrong place.
>
> Fix this by inserting vb2_buf into these accesses so they mimic their
> original behavior.
>
> Fixes: 0650a91499e0 ("media: mtk-vcodec: Correct return type for mem2mem buffer helpers")
>

Hm, having these multiple "vb2_planes planes" fields is extremely confusing!

Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>

Thanks for fixing this,
Eze

> Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
> ---
> drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c | 4 ++--
> drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c | 10 +++++-----
> 2 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
> index a85c7cc8328e..e20b340855e7 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
> @@ -388,7 +388,7 @@ static void mtk_vdec_worker(struct work_struct *work)
> }
> buf.va = vb2_plane_vaddr(&src_buf->vb2_buf, 0);
> buf.dma_addr = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
> - buf.size = (size_t)src_buf->planes[0].bytesused;
> + buf.size = (size_t)src_buf->vb2_buf.planes[0].bytesused;
> if (!buf.va) {
> v4l2_m2m_job_finish(dev->m2m_dev_dec, ctx->m2m_ctx);
> mtk_v4l2_err("[%d] id=%d src_addr is NULL!!",
> @@ -1155,7 +1155,7 @@ static void vb2ops_vdec_buf_queue(struct vb2_buffer *vb)
>
> src_mem.va = vb2_plane_vaddr(&src_buf->vb2_buf, 0);
> src_mem.dma_addr = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
> - src_mem.size = (size_t)src_buf->planes[0].bytesused;
> + src_mem.size = (size_t)src_buf->vb2_buf.planes[0].bytesused;
> mtk_v4l2_debug(2,
> "[%d] buf id=%d va=%p dma=%pad size=%zx",
> ctx->id, src_buf->vb2_buf.index,
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> index c6b48b5925fb..50351adafc47 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> @@ -894,7 +894,7 @@ static void vb2ops_venc_stop_streaming(struct vb2_queue *q)
>
> if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
> while ((dst_buf = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx))) {
> - dst_buf->planes[0].bytesused = 0;
> + dst_buf->vb2_buf.planes[0].bytesused = 0;
> v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
> }
> } else {
> @@ -947,7 +947,7 @@ static int mtk_venc_encode_header(void *priv)
>
> bs_buf.va = vb2_plane_vaddr(&dst_buf->vb2_buf, 0);
> bs_buf.dma_addr = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
> - bs_buf.size = (size_t)dst_buf->planes[0].length;
> + bs_buf.size = (size_t)dst_buf->vb2_buf.planes[0].length;
>
> mtk_v4l2_debug(1,
> "[%d] buf id=%d va=0x%p dma_addr=0x%llx size=%zu",
> @@ -976,7 +976,7 @@ static int mtk_venc_encode_header(void *priv)
> }
>
> ctx->state = MTK_STATE_HEADER;
> - dst_buf->planes[0].bytesused = enc_result.bs_size;
> + dst_buf->vb2_buf.planes[0].bytesused = enc_result.bs_size;
> v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
>
> return 0;
> @@ -1107,12 +1107,12 @@ static void mtk_venc_worker(struct work_struct *work)
>
> if (ret) {
> v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
> - dst_buf->planes[0].bytesused = 0;
> + dst_buf->vb2_buf.planes[0].bytesused = 0;
> v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
> mtk_v4l2_err("venc_if_encode failed=%d", ret);
> } else {
> v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
> - dst_buf->planes[0].bytesused = enc_result.bs_size;
> + dst_buf->vb2_buf.planes[0].bytesused = enc_result.bs_size;
> v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
> mtk_v4l2_debug(2, "venc_if_encode bs size=%d",
> enc_result.bs_size);


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