linux-kernel - Re: [PATCH -next 1/2] gpio: idt3243x: Fix an ignored error return from platform_get

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Date:   Thu, 20 Jan 2022 09:07:10 +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 1/2] gpio: idt3243x: 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 'parent_irq', so making 'parent_irq' an int.
>
> Eliminate the following coccicheck warning:
> ./drivers/gpio/gpio-idt3243x.c:167:6-16: WARNING: Unsigned expression
> compared with zero: parent_irq < 0
>
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Fixes: 30fee1d7462a ("gpio: idt3243x: Fix IRQ check in idt_gpio_probe")
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  drivers/gpio/gpio-idt3243x.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-idt3243x.c b/drivers/gpio/gpio-idt3243x.c
> index 08493b05be2d..52b8b72ded77 100644
> --- a/drivers/gpio/gpio-idt3243x.c
> +++ b/drivers/gpio/gpio-idt3243x.c
> @@ -132,7 +132,7 @@ static int idt_gpio_probe(struct platform_device *pdev)
>         struct device *dev = &pdev->dev;
>         struct gpio_irq_chip *girq;
>         struct idt_gpio_ctrl *ctrl;
> -       unsigned int parent_irq;
> +       int parent_irq;
>         int ngpios;
>         int ret;
>
> --
> 2.20.1.7.g153144c
>

Queued for fixes, thanks!

Bart