linux-kernel - Re: [PATCH] gpio: mpc8xxx: Fix IRQ check in mpc8xxx

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Message-ID: <CACRpkdaKYwse8NhKVgKi5y7xykEtB+UrL-cGo70mV9Q23K372A@mail.gmail.com>
Date:   Sun, 16 Jan 2022 13:06:56 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Miaoqian Lin <linmq006@...il.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>, Ran Wang <ran.wang_1@....com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpio: mpc8xxx: Fix IRQ check in mpc8xxx_probe

On Fri, Jan 14, 2022 at 7:48 AM Miaoqian Lin <linmq006@...il.com> wrote:

> platform_get_irq() returns negative error number instead 0 on failure.
> And the doc of platform_get_irq() provides a usage example:
>
>     int irq = platform_get_irq(pdev, 0);
>     if (irq < 0)
>         return irq;
>
> Fix the check of return value to catch errors correctly.
>
> Fixes: 76c47d1449fc ("gpio: mpc8xxx: Add ACPI support")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij