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

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Message-ID: <6e3049e37b00e2e5a5f02bff7b75d6c9282973b5.camel@pengutronix.de>
Date:   Wed, 06 Dec 2023 14:24:16 +0100
From:   Rouven Czerwinski <r.czerwinski@...gutronix.de>
To:     Johannes Berg <johannes@...solutions.net>,
        Josua Mayer <josua@...id-run.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        kernel@...gutronix.de, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] net: rfkill: gpio: set GPIO direction

Hi Johannes,

On Wed, 2023-12-06 at 14:16 +0100, Johannes Berg wrote:
> 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.

Thanks for the review, you are totally right, I didn't look at the ret
initialization. I moved it inside the if for v2.

Thanks,
Rouven