On 09/19/2012 04:37 PM, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> The plane verification should be done before actually queuing or
> dequeuing buffers, so move it out of __fill_v4l2_buffer and call it
> as a separate step.
>
> The also makes it possible to change the return type of __fill_v4l2_buffer
> to void.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Reviewed-by: Sylwester Nawrocki <s.nawro...@samsung.com>
Tested-by: Sylwester Nawrocki <s.nawro...@samsung.com>
There are just two small comment below...
> ---
> drivers/media/v4l2-core/videobuf2-core.c | 29 +++++++++++++++++------------
> 1 file changed, 17 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/videobuf2-core.c
> b/drivers/media/v4l2-core/videobuf2-core.c
> index 2e26e58..929cc99 100644
> --- a/drivers/media/v4l2-core/videobuf2-core.c
> +++ b/drivers/media/v4l2-core/videobuf2-core.c
> @@ -276,6 +276,9 @@ static void __vb2_queue_free(struct vb2_queue *q,
> unsigned int buffers)
> */
> static int __verify_planes_array(struct vb2_queue *q, const struct
> v4l2_buffer *b)
> {
> + if (!V4L2_TYPE_IS_MULTIPLANAR(b->type))
> + return 0;
> +
> /* Is memory for copying plane information present? */
> if (NULL == b->m.planes) {
> dprintk(1, "Multi-planar buffer passed but "
> @@ -331,10 +334,9 @@ static bool __buffers_in_use(struct vb2_queue *q)
> * __fill_v4l2_buffer() - fill in a struct v4l2_buffer with information to be
> * returned to userspace
> */
> -static int __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b)
> +static void __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b)
> {
> struct vb2_queue *q = vb->vb2_queue;
> - int ret;
>
> /* Copy back data such as timestamp, flags, etc. */
> memcpy(b, &vb->v4l2_buf, offsetof(struct v4l2_buffer, m));
> @@ -342,10 +344,6 @@ static int __fill_v4l2_buffer(struct vb2_buffer *vb,
> struct v4l2_buffer *b)
> b->reserved = vb->v4l2_buf.reserved;
>
> if (V4L2_TYPE_IS_MULTIPLANAR(q->type)) {
> - ret = __verify_planes_array(q, b);
> - if (ret)
> - return ret;
> -
> /*
> * Fill in plane-related data if userspace provided an array
> * for it. The memory and size is verified above.
This comment should be updated, since __verify_planes_array() is now removed.
> @@ -391,8 +389,6 @@ static int __fill_v4l2_buffer(struct vb2_buffer *vb,
> struct v4l2_buffer *b)
>
> if (__buffer_in_use(q, vb))
> b->flags |= V4L2_BUF_FLAG_MAPPED;
> -
> - return 0;
> }
>
> /**
> @@ -411,6 +407,7 @@ static int __fill_v4l2_buffer(struct vb2_buffer *vb,
> struct v4l2_buffer *b)
> int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b)
> {
> struct vb2_buffer *vb;
> + int ret;
>
> if (b->type != q->type) {
> dprintk(1, "querybuf: wrong buffer type\n");
> @@ -422,8 +419,10 @@ int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer
> *b)
> return -EINVAL;
> }
> vb = q->bufs[b->index];
> -
> - return __fill_v4l2_buffer(vb, b);
> + ret = __verify_planes_array(q, b);
> + if (!ret)
> + __fill_v4l2_buffer(vb, b);
> + return ret;
> }
> EXPORT_SYMBOL(vb2_querybuf);
>
> @@ -1061,8 +1060,8 @@ int vb2_prepare_buf(struct vb2_queue *q, struct
> v4l2_buffer *b)
> dprintk(1, "%s(): invalid buffer state %d\n", __func__,
> vb->state);
> return -EINVAL;
> }
> -
> - ret = __buf_prepare(vb, b);
> + ret = __verify_planes_array(q, b);
> + ret = ret ? ret : __buf_prepare(vb, b);
Could we just make it:
ret = __verify_planes_array(q, b);
if (ret < 0)
return ret;
ret = __buf_prepare(vb, b);
if (ret < 0)
return ret;
?
> if (ret < 0)
> return ret;
>
> @@ -1149,6 +1148,9 @@ int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
> ret = -EINVAL;
> goto unlock;
> }
> + ret = __verify_planes_array(q, b);
> + if (ret)
> + return ret;
>
> switch (vb->state) {
> case VB2_BUF_STATE_DEQUEUED:
> @@ -1337,6 +1339,9 @@ int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer
> *b, bool nonblocking)
> dprintk(1, "dqbuf: invalid buffer type\n");
> return -EINVAL;
> }
> + ret = __verify_planes_array(q, b);
> + if (ret)
> + return ret;
>
> ret = __vb2_get_done_vb(q, &vb, nonblocking);
> if (ret < 0) {
--
Regards,
Sylwester
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