linux-kernel - Re: [PATCH 13/62] gpio: gpio-f7188x: Use new GPIO_LINE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20191106053446.GD5290@kw.sim.vm.gnt>
Date:   Wed, 6 Nov 2019 06:34:46 +0100
From:   Simon Guinot <simon.guinot@...uanux.org>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Cc:     mazziesaccount@...il.com, Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/62] gpio: gpio-f7188x: Use new GPIO_LINE_DIRECTION

On Tue, Nov 05, 2019 at 12:16:03PM +0200, Matti Vaittinen wrote:
> It's hard for occasional GPIO code reader/writer to know if values 0/1
> equal to IN or OUT. Use defined GPIO_LINE_DIRECTION_IN and
> GPIO_LINE_DIRECTION_OUT to help them out.
> 
> Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> ---
>  drivers/gpio/gpio-f7188x.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
> index fdc639f856f1..cadd02993539 100644
> --- a/drivers/gpio/gpio-f7188x.c
> +++ b/drivers/gpio/gpio-f7188x.c
> @@ -250,7 +250,10 @@ static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
>  
>  	superio_exit(sio->addr);
>  
> -	return !(dir & 1 << offset);
> +	if (dir & 1 << offset)
> +		return GPIO_LINE_DIRECTION_OUT;
> +
> +	return GPIO_LINE_DIRECTION_IN

Hi Matti,

I am probably missing something but I can't find GPIO_LINE_DIRECTION_IN
and GPIO_LINE_DIRECTION_OUT defined anywhere.

Besides I am an occasional code reader/writer and I find the original
code easy to understand.

Simon

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)