linux-kernel - Re: [PATCH] gpio: mlxbf3: add an error code check in mlxbf3_gpio

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Date: Mon, 15 Jan 2024 11:12:09 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Su Hui <suhui@...china.com>
Cc: linus.walleij@...aro.org, nathan@...nel.org, ndesaulniers@...gle.com, 
	morbo@...gle.com, justinstitt@...gle.com, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, 
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] gpio: mlxbf3: add an error code check in mlxbf3_gpio_probe

On Fri, Jan 12, 2024 at 5:24 AM Su Hui <suhui@...china.com> wrote:
>
> Clang static checker warning: Value stored to 'ret' is never read.
> bgpio_init() returns error code if failed, it's better to add this
> check.
>
> Signed-off-by: Su Hui <suhui@...china.com>
> ---
>  drivers/gpio/gpio-mlxbf3.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpio/gpio-mlxbf3.c b/drivers/gpio/gpio-mlxbf3.c
> index 7a3e1760fc5b..d5906d419b0a 100644
> --- a/drivers/gpio/gpio-mlxbf3.c
> +++ b/drivers/gpio/gpio-mlxbf3.c
> @@ -215,6 +215,8 @@ static int mlxbf3_gpio_probe(struct platform_device *pdev)
>                         gs->gpio_clr_io + MLXBF_GPIO_FW_DATA_OUT_CLEAR,
>                         gs->gpio_set_io + MLXBF_GPIO_FW_OUTPUT_ENABLE_SET,
>                         gs->gpio_clr_io + MLXBF_GPIO_FW_OUTPUT_ENABLE_CLEAR, 0);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "%s: bgpio_init() failed", __func__);
>
>         gc->request = gpiochip_generic_request;
>         gc->free = gpiochip_generic_free;
> --
> 2.30.2
>
>

I added the Fixes: tag and applied it.

Bartosz