linux-kernel - Re: [PATCH for v5.6] hantro: Fix broken media controller links

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Date:   Tue, 04 Feb 2020 14:58:51 -0500
From:   Nicolas Dufresne <nicolas@...fresne.ca>
To:     Ezequiel Garcia <ezequiel@...labora.com>,
        linux-media@...r.kernel.org
Cc:     kernel@...labora.com, linux-kernel@...r.kernel.org,
        Hans Verkuil <hverkuil@...all.nl>, stable@...r.kernel.org
Subject: Re: [PATCH for v5.6] hantro: Fix broken media controller links

Le mardi 04 février 2020 à 16:38 -0300, Ezequiel Garcia a écrit :
> The driver currently creates a broken topology,
> with a source-to-source link and a sink-to-sink
> link instead of two source-to-sink links.
> 
> Reported-by: Nicolas Dufresne <nicolas@...fresne.ca>
> Cc: <stable@...r.kernel.org>      # for v5.3 and up
> Signed-off-by: Ezequiel Garcia <ezequiel@...labora.com>

Tested-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

> ---
>  drivers/staging/media/hantro/hantro_drv.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/media/hantro/hantro_drv.c
> b/drivers/staging/media/hantro/hantro_drv.c
> index 448493a08805..840b96bee082 100644
> --- a/drivers/staging/media/hantro/hantro_drv.c
> +++ b/drivers/staging/media/hantro/hantro_drv.c
> @@ -556,13 +556,13 @@ static int hantro_attach_func(struct hantro_dev *vpu,
>  		goto err_rel_entity1;
>  
>  	/* Connect the three entities */
> -	ret = media_create_pad_link(&func->vdev.entity, 0, &func->proc, 1,
> +	ret = media_create_pad_link(&func->vdev.entity, 0, &func->proc, 0,

As for the m2m comment, some local define to name the pad index would make this
readable.

>  				    MEDIA_LNK_FL_IMMUTABLE |
>  				    MEDIA_LNK_FL_ENABLED);
>  	if (ret)
>  		goto err_rel_entity2;
>  
> -	ret = media_create_pad_link(&func->proc, 0, &func->sink, 0,
> +	ret = media_create_pad_link(&func->proc, 1, &func->sink, 0,
>  				    MEDIA_LNK_FL_IMMUTABLE |
>  				    MEDIA_LNK_FL_ENABLED);
>  	if (ret)