Received-SPF: pass (google.com: domain of linux-wireless-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Sender: kvalo=codeaurora.org@mg.codeaurora.org
DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org CC250C433F1
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: Re: brcmsmac: Drop unnecessary NULL check after container_of
From:   Kalle Valo <kvalo@codeaurora.org>
In-Reply-To: <20210511235629.1686038-1-linux@roeck-us.net>
References: <20210511235629.1686038-1-linux@roeck-us.net>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Arend van Spriel <aspriel@gmail.com>,
        "David S . Miller" <davem@davemloft.net>,
        linux-wireless@vger.kernel.org,
        brcm80211-dev-list.pdl@broadcom.com, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, Guenter Roeck <linux@roeck-us.net>
User-Agent: pwcli/0.1.0-git (https://github.com/kvalo/pwcli/) Python/3.7.3
Message-Id: <20210615104240.57EF3C433F1@smtp.codeaurora.org>
Date:   Tue, 15 Jun 2021 10:42:40 +0000 (UTC)
Precedence: bulk

Guenter Roeck <linux@roeck-us.net> wrote:

> The parameter passed to ai_detach() is guaranteed to never be NULL
> because it is checked by the caller. Consequently, the result of
> container_of() on it is also never NULL, and a NULL check on it
> is unnecessary. Even without that, the NULL check would still be
> unnecessary because the subsequent kfree() can handle NULL arguments.
> On top of all that, it is misleading to check the result of container_of()
> against NULL because the position of the contained element could change,
> which would make the check invalid. Remove it.
> 
> This change was made automatically with the following Coccinelle script.
> 
> @@
> type t;
> identifier v;
> statement s;
> @@
> 
> <+...
> (
>   t v = container_of(...);
> |
>   v = container_of(...);
> )
>   ...
>   when != v
> - if (\( !v \| v == NULL \) ) s
> ...+>
> 
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Patch applied to wireless-drivers-next.git, thanks.

34fe7038a3b3 brcmsmac: Drop unnecessary NULL check after container_of

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210511235629.1686038-1-linux@roeck-us.net/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches