linux-kernel - Re: [PATCH 04/11] media: sun6i-csi: add a missing return code

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Date:   Thu, 17 Jun 2021 13:37:40 +0800
From:   yong <yong.deng@...ewell.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 04/11] media: sun6i-csi: add a missing return code

Hi,

It does not mean there is a error. As the comment, it just check if the
csi is powered.

On Wed, 16 Jun 2021 14:28:30 +0200
Mauro Carvalho Chehab <mchehab+huawei@...nel.org> wrote:

> As pointed by smatch, there's a missing return code:
> 
> 	drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c:485
> sun6i_video_open() warn: missing error code 'ret'
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
>  drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c index
> 3181d0781b61..07b2161392d2 100644 ---
> a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c +++
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c @@ -481,8
> +481,10 @@ static int sun6i_video_open(struct file *file) goto
> fh_release; 
>  	/* check if already powered */
> -	if (!v4l2_fh_is_singular_file(file))
> +	if (!v4l2_fh_is_singular_file(file)) {
> +		ret = -EBUSY;
>  		goto unlock;
> +	}
>  
>  	ret = sun6i_csi_set_power(video->csi, true);
>  	if (ret < 0)

Thanks