[PATCH v6 05/18] media: mediatek: jpeg: Use vb2_get_buffer() instead of directly access to buffers array

[Benjamin Gaignard <benjamin.gaignard@collabora.com>]

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/mediatek/jpeg/mtk_jpeg_core.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
index 621038aab116..62910a1b8a98 100644
--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
@@ -603,7 +603,11 @@ static int mtk_jpeg_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 		return -EINVAL;
 	}
 
-	vb = vq->bufs[buf->index];
+	vb = vb2_get_buffer(vq, buf->index);
+	if (!vb) {
+		dev_err(ctx->jpeg->dev, "buffer not found\n");
+		return -EINVAL;
+	}
 	jpeg_src_buf = mtk_jpeg_vb2_to_srcbuf(vb);
 	jpeg_src_buf->bs_size = buf->m.planes[0].bytesused;
 
-- 
2.39.2