linux-kernel - Re: [PATCH v2] fpga: stratix10-soc: Do not use ret uninitialized in s10

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Date:   Wed, 1 Dec 2021 08:48:24 +0800
From:   Xu Yilun <yilun.xu@...el.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Moritz Fischer <mdf@...nel.org>, Wu Hao <hao.wu@...el.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, Russ Weight <russell.h.weight@...el.com>,
        Tom Rix <trix@...hat.com>
Subject: Re: [PATCH v2] fpga: stratix10-soc: Do not use ret uninitialized in
 s10_probe()

On Tue, Nov 30, 2021 at 03:11:24PM -0700, Nathan Chancellor wrote:
> Clang warns:
> 
> drivers/fpga/stratix10-soc.c:431:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
>         return ret;
>                ^~~
> 
> ret is only assigned in an error path now so just return 0 directly.
> 
> Fixes: 4ba0b2c294fe ("fpga: mgr: Use standard dev_release for class driver")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1517
> Reviewed-by: Russ Weight <russell.h.weight@...el.com>
> Reviewed-by: Tom Rix <trix@...hat.com>
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>

Acked-by: Xu Yilun <yilun.xu@...el.com>

Thanks,
Yilun

> ---
> 
> v1 -> v2: https://lore.kernel.org/r/20211129161009.3625548-1-nathan@kernel.org/
> 
> * Drop clang's suggestion text (Tom).
> 
> * Pick up Russ and Tom's review tags.
> 
>  drivers/fpga/stratix10-soc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
> index 737d14c6e0de..357cea58ec98 100644
> --- a/drivers/fpga/stratix10-soc.c
> +++ b/drivers/fpga/stratix10-soc.c
> @@ -428,7 +428,7 @@ static int s10_probe(struct platform_device *pdev)
>  	}
>  
>  	platform_set_drvdata(pdev, mgr);
> -	return ret;
> +	return 0;
>  
>  probe_err:
>  	stratix10_svc_free_channel(priv->chan);
> 
> base-commit: 8886a579744fbfa53e69aa453ed10ae3b1f9abac
> -- 
> 2.34.1