linux-kernel - Re: [PATCH v4 5/7] gpio: gpiolib: Add a check to validate GPIO hwirq

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Date:   Wed, 18 May 2022 23:08:15 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Marc Zyngier <maz@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Prabhakar <prabhakar.csengg@...il.com>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v4 5/7] gpio: gpiolib: Add a check to validate GPIO hwirq

On Wed, May 18, 2022 at 9:30 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@...renesas.com> wrote:
>
> Add a check to validate GPIO hwirq is always within the range of hwirq_max
> set in the GPIO irq domain.

...

> +                       if (WARN(hwirq >= domain->hwirq_max,
> +                                "error: hwirq 0x%x is too large for %s\n",
> +                                (int)hwirq, domain->name))

Using castings in the printf() often points to possible mistakes or
missed custom specifiers.

...

> +               if (WARN(hwirq >= domain->hwirq_max,
> +                        "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))

Ditto.

-- 
With Best Regards,
Andy Shevchenko