linux-kernel - Re: [PATCH] gpiolib: skip unwanted events, don't convert them to opposite edge

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Message-ID: <CAHp75Vddwkxgj6uLc9GSqqAF0PQCzX9a2QyyBhE7GviVBJH8jQ@mail.gmail.com>
Date:   Mon, 3 Jul 2017 14:07:15 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpiolib: skip unwanted events, don't convert them to
 opposite edge

On Mon, Jul 3, 2017 at 12:12 PM, Bartosz Golaszewski <brgl@...ev.pl> wrote:
> The previous fix for filtering out of unwatched events was not entirely
> correct. Instead of skipping the events we don't want, they are now
> interpreted as events with opposing edge.
>
> In order to fix it: always read the GPIO line value on interrupt and
> only emit the event if it corresponds with the event type we requested.

>         struct lineevent_state *le = p;
>         struct gpioevent_data ge;
> -       int ret;
> +       int ret, level;

I prefer
int level;
int ret;

Though it's matter of taste (I don't remember which one Linus' preferable).

-- 
With Best Regards,
Andy Shevchenko