linux-kernel - Re: [PATCH v3] gpio: sifive: Add missing check for platform_get

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Message-ID: <CAMRc=McoDu4jsy4pWnu=T1+q_FfnYa8bfqWb39ZZXM_YmaGpXw@mail.gmail.com>
Date:   Tue, 13 Jun 2023 16:22:42 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>
Cc:     andy.shevchenko@...il.com, oe-kbuild-all@...ts.linux.dev,
        linus.walleij@...aro.org, palmer@...belt.com,
        paul.walmsley@...ive.com, linux-gpio@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] gpio: sifive: Add missing check for platform_get_irq

On Tue, Jun 6, 2023 at 5:12 AM Jiasheng Jiang <jiasheng@...as.ac.cn> wrote:
>
> Add the missing check for platform_get_irq() and return error code
> if it fails.
> The returned error code will be dealed with in
> builtin_platform_driver(sifive_gpio_driver) and the driver will not
> be registered.
>
> Fixes: f52d6d8b43e5 ("gpio: sifive: To get gpio irq offset from device tree data")
> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
> ---
> Changelog:
>
> v2 -> v3:
>
> 1. Check before assigning values.
>
> v1 -> v2:
>
> 1. Return "girq->parents[0]" instead of "-ENODEV".
> ---
>  drivers/gpio/gpio-sifive.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpio/gpio-sifive.c b/drivers/gpio/gpio-sifive.c
> index 98939cd4a71e..745e5f67254e 100644
> --- a/drivers/gpio/gpio-sifive.c
> +++ b/drivers/gpio/gpio-sifive.c
> @@ -221,8 +221,12 @@ static int sifive_gpio_probe(struct platform_device *pdev)
>                 return -ENODEV;
>         }
>
> -       for (i = 0; i < ngpio; i++)
> -               chip->irq_number[i] = platform_get_irq(pdev, i);
> +       for (i = 0; i < ngpio; i++) {
> +               ret = platform_get_irq(pdev, i);
> +               if (ret < 0)
> +                       return ret;
> +               chip->irq_number[i] = ret;
> +       }
>
>         ret = bgpio_init(&chip->gc, dev, 4,
>                          chip->base + SIFIVE_GPIO_INPUT_VAL,
> --
> 2.25.1
>

Applied, thanks!

Bart