[PATCH v11 11/56] media: mediatek: jpeg: Use vb2_get_buffer() instead of directly access to buffers array

Benjamin Gaignard
2023-10-12T11:47:03Z

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>
CC: Bin Liu <bin.liu@mediatek.com>
CC: Matthias Brugger <matthias.bgg@gmail.com>
---
drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
index 7194f88edc0f..73a063b1569b 100644
--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
@@ -598,12 +598,11 @@ static int mtk_jpeg_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
goto end;

vq = v4l2_m2m_get_vq(fh->m2m_ctx, buf->type);
- if (buf->index >= vq->num_buffers) {
- dev_err(ctx->jpeg->dev, "buffer index out of range\n");
+ vb = vb2_get_buffer(vq, buf->index);
+ if (!vb) {
+ dev_err(ctx->jpeg->dev, "buffer not found\n");
return -EINVAL;
}
-
- vb = vq->bufs[buf->index];
jpeg_src_buf = mtk_jpeg_vb2_to_srcbuf(vb);
jpeg_src_buf->bs_size = buf->m.planes[0].bytesused;

--
2.39.2