netdev - Re: [PATCH v2 net-next] failover: Add missing check to validate 'slave_dev' in net_failover_slave

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Date:   Wed, 05 Sep 2018 22:16:28 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     yuehaibing@...wei.com
Cc:     sridhar.samudrala@...el.com, stephen@...workplumber.org,
        dan.carpenter@...cle.com, alexander.h.duyck@...el.com,
        jeffrey.t.kirsher@...el.com, liran.alon@...cle.com,
        joao.m.martins@...cle.com, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH v2 net-next] failover: Add missing check to validate
 'slave_dev' in net_failover_slave_unregister

From: YueHaibing <yuehaibing@...wei.com>
Date: Tue, 4 Sep 2018 02:56:26 +0000

> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> drivers/net/net_failover.c: In function 'net_failover_slave_unregister':
> drivers/net/net_failover.c:598:35: warning:
>  variable 'primary_dev' set but not used [-Wunused-but-set-variable]
> 
> There should check the validity of 'slave_dev'.
> 
> Fixes: cfc80d9a1163 ("net: Introduce net_failover driver")
> 
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
> v2: use WARN_ON_ONCE as Liran Alon suggested

Applied.