media: videobuf2: Use vb2_buffer instead of index

Directly use vb2_buffer pointer instead of index inside queue array.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

1 files changed, 30 insertions, 21 deletions

diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
index c7a54d82a55e..d19d82a75ac6 100644
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -364,13 +364,12 @@ static void set_buffer_cache_hints(struct vb2_queue *q,
 }
 
 static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *mdev,
-				    struct v4l2_buffer *b, bool is_prepare,
-				    struct media_request **p_req)
+				    struct vb2_buffer *vb, struct v4l2_buffer *b,
+				    bool is_prepare, struct media_request **p_req)
 {
 	const char *opname = is_prepare ? "prepare_buf" : "qbuf";
 	struct media_request *req;
 	struct vb2_v4l2_buffer *vbuf;
-	struct vb2_buffer *vb;
 	int ret;
 
 	if (b->type != q->type) {
@@ -378,23 +377,11 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md
 		return -EINVAL;
 	}
 
-	if (b->index >= q->num_buffers) {
-		dprintk(q, 1, "%s: buffer index out of range\n", opname);
-		return -EINVAL;
-	}
-
-	if (q->bufs[b->index] == NULL) {
-		/* Should never happen */
-		dprintk(q, 1, "%s: buffer is NULL\n", opname);
-		return -EINVAL;
-	}
-
 	if (b->memory != q->memory) {
 		dprintk(q, 1, "%s: invalid memory type\n", opname);
 		return -EINVAL;
 	}
 
-	vb = q->bufs[b->index];
 	vbuf = to_vb2_v4l2_buffer(vb);
 	ret = __verify_planes_array(vb, b);
 	if (ret)
@@ -667,7 +654,7 @@ int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b)
 	vb = q->bufs[b->index];
 	ret = __verify_planes_array(vb, b);
 	if (!ret)
-		vb2_core_querybuf(q, b->index, b);
+		vb2_core_querybuf(q, vb, b);
 	return ret;
 }
 EXPORT_SYMBOL(vb2_querybuf);
@@ -723,6 +710,7 @@ EXPORT_SYMBOL_GPL(vb2_reqbufs);
 int vb2_prepare_buf(struct vb2_queue *q, struct media_device *mdev,
 		    struct v4l2_buffer *b)
 {
+	struct vb2_buffer *vb;
 	int ret;
 
 	if (vb2_fileio_is_active(q)) {
@@ -733,9 +721,15 @@ int vb2_prepare_buf(struct vb2_queue *q, struct media_device *mdev,
 	if (b->flags & V4L2_BUF_FLAG_REQUEST_FD)
 		return -EINVAL;
 
-	ret = vb2_queue_or_prepare_buf(q, mdev, b, true, NULL);
+	if (b->index >= q->num_buffers) {
+		dprintk(q, 1, "buffer index out of range\n");
+		return -EINVAL;
+	}
+	vb = q->bufs[b->index];
 
-	return ret ? ret : vb2_core_prepare_buf(q, b->index, b);
+	ret = vb2_queue_or_prepare_buf(q, mdev, vb, b, true, NULL);
+
+	return ret ? ret : vb2_core_prepare_buf(q, vb, b);
 }
 EXPORT_SYMBOL_GPL(vb2_prepare_buf);
 
@@ -803,6 +797,7 @@ int vb2_qbuf(struct vb2_queue *q, struct media_device *mdev,
 	     struct v4l2_buffer *b)
 {
 	struct media_request *req = NULL;
+	struct vb2_buffer *vb;
 	int ret;
 
 	if (vb2_fileio_is_active(q)) {
@@ -810,10 +805,16 @@ int vb2_qbuf(struct vb2_queue *q, struct media_device *mdev,
 		return -EBUSY;
 	}
 
-	ret = vb2_queue_or_prepare_buf(q, mdev, b, false, &req);
+	if (b->index >= q->num_buffers) {
+		dprintk(q, 1, "buffer index out of range\n");
+		return -EINVAL;
+	}
+	vb = q->bufs[b->index];
+
+	ret = vb2_queue_or_prepare_buf(q, mdev, vb, b, false, &req);
 	if (ret)
 		return ret;
-	ret = vb2_core_qbuf(q, b->index, b, req);
+	ret = vb2_core_qbuf(q, vb, b, req);
 	if (req)
 		media_request_put(req);
 	return ret;
@@ -873,7 +874,15 @@ EXPORT_SYMBOL_GPL(vb2_streamoff);
 
 int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
 {
-	return vb2_core_expbuf(q, &eb->fd, eb->type, eb->index,
+	struct vb2_buffer *vb;
+
+	if (eb->index >= q->num_buffers) {
+		dprintk(q, 1, "buffer index out of range\n");
+		return -EINVAL;
+	}
+	vb = q->bufs[eb->index];
+
+	return vb2_core_expbuf(q, &eb->fd, eb->type, vb,
 				eb->plane, eb->flags);
 }
 EXPORT_SYMBOL_GPL(vb2_expbuf);