linux-kernel - Re: [PATCH v2 3/5] gpio: use new gpio_set

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Date:   Sat, 16 Mar 2019 14:45:19 +0100
From:   Thomas Petazzoni <thomas.petazzoni@...tlin.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Frank Rowand <frowand.list@...il.com>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jan Kundrát <jan.kundrat@...net.cz>
Subject: Re: [PATCH v2 3/5] gpio: use new gpio_set_config() helper in more
 places

Hello,

On Fri, 15 Mar 2019 18:43:52 -0700
Guenter Roeck <linux@...ck-us.net> wrote:

> > diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> > index cf8a4402fef1..9762a836fec9 100644
> > --- a/drivers/gpio/gpiolib.c
> > +++ b/drivers/gpio/gpiolib.c
> > @@ -2762,7 +2762,7 @@ int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
> >  	}
> >  
> >  	config = pinconf_to_config_packed(PIN_CONFIG_INPUT_DEBOUNCE, debounce);
> > -	return chip->set_config(chip, gpio_chip_hwgpio(desc), config);
> > +	return gpio_set_config(chip, gpio_chip_hwgpio(desc), config);  
> 
> Are you sure this is correct ? This patch results in a number of tracebacks
> in mainline. Reverting it fixes the problem.
> 
> gpio_set_config() seems to pack config, but it is already packed above.
> That seems a bit suspicious.

I'll have a look. In the mean time, I'm fine with the patch being
reverted.

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com