linux-kernel - Re: [PATCH] ipvlan: Remove NULL check before dev

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Date:   Thu, 11 May 2023 08:54:53 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Yang Li <yang.lee@...ux.alibaba.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH] ipvlan: Remove NULL check before dev_{put, hold}

On Thu, 11 May 2023 15:21:19 +0800
Yang Li <yang.lee@...ux.alibaba.com> wrote:

> The call netdev_{put, hold} of dev_{put, hold} will check NULL,
> so there is no need to check before using dev_{put, hold},
> remove it to silence the warning:
> 
> ./drivers/net/ipvlan/ipvlan_core.c:559:3-11: WARNING: NULL check before dev_{put, hold} functions is not needed.
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4930
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>

Maybe add new coccinelle script for this? scripts/free/dev_hold.cocci?