linux-kernel - Re: [PATCH -next 2/2] gpio: mpc8xxx: Fix an ignored error return from platform_get

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Date:   Thu, 20 Jan 2022 09:07:23 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Yang Li <yang.lee@...ux.alibaba.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Miaoqian Lin <linmq006@...il.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH -next 2/2] gpio: mpc8xxx: Fix an ignored error return from platform_get_irq()

On Wed, Jan 19, 2022 at 2:04 AM Yang Li <yang.lee@...ux.alibaba.com> wrote:
>
> The return from the call to platform_get_irq() is int, it can be
> a negative error code, however this is being assigned to an unsigned
> int variable 'irqn', so making 'irqn' an int.
>
> Eliminate the following coccicheck warning:
> ./drivers/gpio/gpio-mpc8xxx.c:391:5-21: WARNING: Unsigned expression
> compared with zero: mpc8xxx_gc -> irqn < 0
>
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Fixes: 0b39536cc699 ("gpio: mpc8xxx: Fix IRQ check in mpc8xxx_probe")
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  drivers/gpio/gpio-mpc8xxx.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
> index 01634c8d27b3..a964e25ea620 100644
> --- a/drivers/gpio/gpio-mpc8xxx.c
> +++ b/drivers/gpio/gpio-mpc8xxx.c
> @@ -47,7 +47,7 @@ struct mpc8xxx_gpio_chip {
>                                 unsigned offset, int value);
>
>         struct irq_domain *irq;
> -       unsigned int irqn;
> +       int irqn;
>  };
>
>  /*
> --
> 2.20.1.7.g153144c
>

Queued for fixes, thanks!

Bart