Re: [PATCH] [media] vb2: include length in dmabuf qbuf debug message

[Sakari Ailus]

Hi Javier,

Thanks for the patch!

On Thu, Jul 14, 2016 at 11:09:34AM -0400, Javier Martinez Canillas wrote:
> If the the VIDIOC_QBUF ioctl fails due a wrong dmabuf length,
> it's useful to get the invalid length as a debug information.
> 
> Before this patch:
> 
> vb2-core: __qbuf_dmabuf: invalid dmabuf length for plane 1
> 
> After this patch:
> 
> vb2-core: __qbuf_dmabuf: invalid dmabuf length 221248 for plane 1
> 
> Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
> 
> ---
> 
>  drivers/media/v4l2-core/videobuf2-core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
> index ca8ffeb56d72..97d1483e0f7a 100644
> --- a/drivers/media/v4l2-core/videobuf2-core.c
> +++ b/drivers/media/v4l2-core/videobuf2-core.c
> @@ -1228,8 +1228,8 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const void *pb)
>  			planes[plane].length = dbuf->size;
>  
>  		if (planes[plane].length < vb->planes[plane].min_length) {
> -			dprintk(1, "invalid dmabuf length for plane %d\n",
> -				plane);
> +			dprintk(1, "invalid dmabuf length %d for plane %d\n",

%u, please. You might want to print the minimum length as well.

> +				planes[plane].length, plane);
>  			dma_buf_put(dbuf);
>  			ret = -EINVAL;
>  			goto err;

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@xxxxxx	XMPP: sailus@xxxxxxxxxxxxxx