linux-kernel - Re: [PATCH 3/3] media: atomisp: handle errors at sh_css_create_isp

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Date:   Fri, 12 Nov 2021 13:49:07 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Deepak R Varma <drv@...lo.com>,
        Ding Xiang <dingxiang@...s.chinamobile.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Robert Foss <robert.foss@...aro.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Yang Li <abaci-bugfix@...ux.alibaba.com>,
        Zheng Yongjun <zhengyongjun3@...wei.com>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, llvm@...ts.linux.dev
Subject: Re: [PATCH 3/3] media: atomisp: handle errors at
 sh_css_create_isp_params()

On Thu, Nov 11, 2021 at 11:08:53PM +0000, Mauro Carvalho Chehab wrote:
> The succ var tracks memory allocation erros on this function.
> 
> Fix it, in order to stop this W=1 Werror in clang:
> 
> drivers/staging/media/atomisp/pci/sh_css_params.c:2430:7: error: variable 'succ' set but not used [-Werror,-Wunused-but-set-variable]
>         bool succ = true;
>              ^
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
> 
> To mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH 0/3] at: https://lore.kernel.org/all/cover.1636672052.git.mchehab+huawei@kernel.org/
> 
>  drivers/staging/media/atomisp/pci/sh_css_params.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/staging/media/atomisp/pci/sh_css_params.c b/drivers/staging/media/atomisp/pci/sh_css_params.c
> index dbd3bfe3d343..3cc5b82a8a31 100644
> --- a/drivers/staging/media/atomisp/pci/sh_css_params.c
> +++ b/drivers/staging/media/atomisp/pci/sh_css_params.c
> @@ -2473,6 +2473,10 @@ sh_css_create_isp_params(struct ia_css_stream *stream,
>  	succ &= (ddr_ptrs->macc_tbl != mmgr_NULL);
>  
>  	*isp_params_out = params;
> +
> +	if (!succ)
> +		return -ENOMEM;
> +
>  	return err;
>  }
>  
> -- 
> 2.33.1
> 
>