linux-kernel - Re: [PATCH] net: dsa: return success if there was nothing to do

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Message-ID: <YiO1yrlc2lLOx2KR@lunn.ch>
Date:   Sat, 5 Mar 2022 20:11:06 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     trix@...hat.com
Cc:     vivien.didelot@...il.com, f.fainelli@...il.com, olteanv@...il.com,
        davem@...emloft.net, kuba@...nel.org, nathan@...nel.org,
        ndesaulniers@...gle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] net: dsa: return success if there was nothing to do

On Sat, Mar 05, 2022 at 09:14:48AM -0800, trix@...hat.com wrote:
> From: Tom Rix <trix@...hat.com>
> 
> Clang static analysis reports this representative issue
> dsa.c:486:2: warning: Undefined or garbage value
>   returned to caller
>   return err;
>   ^~~~~~~~~~
> 
> err is only set in the loop.  If the loop is empty,
> garbage will be returned.  So initialize err to 0
> to handle this noop case.
> 
> Signed-off-by: Tom Rix <trix@...hat.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew