linux-kernel - Re: [PATCH] media: mediatek: vcodec: Handle invalid decoder vsi

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Date: Fri, 22 Mar 2024 10:44:31 -0400
From: Nicolas Dufresne <nicolas.dufresne@...labora.com>
To: Irui Wang <irui.wang@...iatek.com>, Hans Verkuil
 <hverkuil-cisco@...all.nl>,  Mauro Carvalho Chehab <mchehab@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>, Yunfei Dong
 <yunfei.dong@...iatek.com>, angelogioacchino.delregno@...labora.com, 
 sebastian.fricke@...labora.com
Cc: Longfei Wang <longfei.wang@...iatek.com>, Maoguang Meng
 <maoguang.meng@...iatek.com>, 
 Project_Global_Chrome_Upstream_Group@...iatek.com,
 linux-media@...r.kernel.org,  linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,  linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] media: mediatek: vcodec: Handle invalid decoder vsi

Hi,

Le mercredi 20 mars 2024 à 14:13 +0800, Irui Wang a écrit :
> Handle invalid decoder vsi in vpu_dec_init to ensure the decoder vsi is
> valid for future use.
> 
> Signed-off-by: Irui Wang <irui.wang@...iatek.com>
> ---
>  .../media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c    | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
> index 82e57ae983d5..17770993fe5a 100644
> --- a/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
> +++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
> @@ -231,6 +231,12 @@ int vpu_dec_init(struct vdec_vpu_inst *vpu)
>  	mtk_vdec_debug(vpu->ctx, "vdec_inst=%p", vpu);
>  
>  	err = vcodec_vpu_send_msg(vpu, (void *)&msg, sizeof(msg));
> +
> +	if (IS_ERR_OR_NULL(vpu->vsi)) {
> +		mtk_vdec_err(vpu->ctx, "invalid vdec vsi, status=%d", err);
> +		return -EINVAL;
> +	}
> +

Make sense, though on the cosmetic side, were is the err value from if the vsi
pointer is NULL ?

Nicolas

>  	mtk_vdec_debug(vpu->ctx, "- ret=%d", err);
>  	return err;
>  }