linux-kernel - Re: [PATCH] net: rfkill: gpio: set GPIO direction

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Date:   Wed, 06 Dec 2023 14:16:15 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Rouven Czerwinski <r.czerwinski@...gutronix.de>,
        Josua Mayer <josua@...id-run.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     kernel@...gutronix.de, stable@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH] net: rfkill: gpio: set GPIO direction

On Wed, 2023-12-06 at 14:13 +0100, Rouven Czerwinski wrote:
> 
> +++ b/net/rfkill/rfkill-gpio.c
> @@ -126,6 +126,16 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> +	if (rfkill->reset_gpio)
> +		ret = gpiod_direction_output(rfkill->reset_gpio, true);
> +	if (ret)
> +		return ret;
> +
> +	if (rfkill->shutdown_gpio)
> +		ret = gpiod_direction_output(rfkill->shutdown_gpio, true);
> +	if (ret)
> +		return ret;
> 

That's weird, you need ret to be inside the if. It's even entirely
uninitialized if you don't have ACPI, if you don't have reset/shutdown.

johannes