[media] videobuf2-core: move __setup_lengths into __vb2_queue_alloc()

Rather than setting up the lengths at the end, set them up when
the vb2_buffer is allocated. This also ensures that buf_init()
sees the right length values.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/v4l2-core/videobuf2-core.c

@@ -286,25 +286,6 @@ static void __vb2_buf_dmabuf_put(struct vb2_buffer *vb)
 		__vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
 }
 
-/**
- * __setup_lengths() - setup initial lengths for every plane in
- * every buffer on the queue
- */
-static void __setup_lengths(struct vb2_queue *q, unsigned int n)
-{
-	unsigned int buffer, plane;
-	struct vb2_buffer *vb;
-
-	for (buffer = q->num_buffers; buffer < q->num_buffers + n; ++buffer) {
-		vb = q->bufs[buffer];
-		if (!vb)
-			continue;
-
-		for (plane = 0; plane < vb->num_planes; ++plane)
-			vb->planes[plane].length = q->plane_sizes[plane];
-	}
-}
-
 /**
  * __setup_offsets() - setup unique offsets ("cookies") for every plane in
  * every buffer on the queue
@@ -351,7 +332,7 @@ static void __setup_offsets(struct vb2_queue *q, unsigned int n)
 static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
 			     unsigned int num_buffers, unsigned int num_planes)
 {
-	unsigned int buffer;
+	unsigned int buffer, plane;
 	struct vb2_buffer *vb;
 	int ret;
 
@@ -369,6 +350,8 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
 		vb->index = q->num_buffers + buffer;
 		vb->type = q->type;
 		vb->memory = memory;
+		for (plane = 0; plane < num_planes; ++plane)
+			vb->planes[plane].length = q->plane_sizes[plane];
 
 		/* Allocate video buffer memory for the MMAP type */
 		if (memory == VB2_MEMORY_MMAP) {
@@ -397,7 +380,6 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
 		q->bufs[q->num_buffers + buffer] = vb;
 	}
 
-	__setup_lengths(q, buffer);
 	if (memory == VB2_MEMORY_MMAP)
 		__setup_offsets(q, buffer);