[PATCH v6 07/18] media: sti: hva: 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/st/sti/hva/hva-v4l2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/st/sti/hva/hva-v4l2.c b/drivers/media/platform/st/sti/hva/hva-v4l2.c
index 3a848ca32a0e..326be09bdb55 100644
--- a/drivers/media/platform/st/sti/hva/hva-v4l2.c
+++ b/drivers/media/platform/st/sti/hva/hva-v4l2.c
@@ -577,6 +577,10 @@ static int hva_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 		}
 
 		vb2_buf = vb2_get_buffer(vq, buf->index);
+		if (!vb2_buf) {
+			dev_dbg(dev, "%s buffer index %d not found\n", ctx->name, buf->index);
+			return -EINVAL;
+		}
 		stream = to_hva_stream(to_vb2_v4l2_buffer(vb2_buf));
 		stream->bytesused = buf->bytesused;
 	}
-- 
2.39.2