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;
MIME-Version: 1.0
References: <20220117142919.207370-1-marcan@marcan.st> <20220117142919.207370-3-marcan@marcan.st>
In-Reply-To: <20220117142919.207370-3-marcan@marcan.st>
From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Wed, 19 Jan 2022 23:35:44 +0200
Message-ID: <CAHp75VdZG4n1QySXyM+w1gJOWzq5Ng-Ym8dL1sSC_MLP2hqxAw@mail.gmail.com>
Subject: Re: [PATCH v3 2/9] brcmfmac: firmware: Allocate space for default
 boardrev in nvram
To:     Hector Martin <marcan@marcan.st>
Cc:     Kalle Valo <kvalo@codeaurora.org>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Len Brown <lenb@kernel.org>,
        Arend van Spriel <aspriel@gmail.com>,
        Franky Lin <franky.lin@broadcom.com>,
        Hante Meuleman <hante.meuleman@broadcom.com>,
        Chi-hsien Lin <chi-hsien.lin@infineon.com>,
        Wright Feng <wright.feng@infineon.com>,
        Dmitry Osipenko <digetx@gmail.com>,
        Sven Peter <sven@svenpeter.dev>,
        Alyssa Rosenzweig <alyssa@rosenzweig.io>,
        Mark Kettenis <kettenis@openbsd.org>,
        =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= <zajec5@gmail.com>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Hans de Goede <hdegoede@redhat.com>,
        "John W. Linville" <linville@tuxdriver.com>,
        "brian m. carlson" <sandals@crustytoothpaste.net>,
        "open list:TI WILINK WIRELES..." <linux-wireless@vger.kernel.org>,
        netdev <netdev@vger.kernel.org>,
        devicetree <devicetree@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        "open list:BROADCOM BRCM80211 IEEE802.11n WIRELESS DRIVER" 
        <brcm80211-dev-list.pdl@broadcom.com>,
        SHA-cyfmac-dev-list@infineon.com
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Mon, Jan 17, 2022 at 4:30 PM Hector Martin <marcan@marcan.st> wrote:
>
> If boardrev is missing from the NVRAM we add a default one, but this
> might need more space in the output buffer than was allocated. Ensure
> we have enough padding for this in the buffer.

Do you know this ahead (before allocation happens)?
If yes, the size change should happen conditionally.

Alternatively, krealloc() may be used.

-- 
With Best Regards,
Andy Shevchenko