linux-kernel - Re: [PATCH] gpiolib: sysfs: Fix improper error handling on failed export

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Message-ID: <CAHp75VcBMbENVKhbdJnXHGxAP85_5CMNxoq7JqV5XbUyRLPoaQ@mail.gmail.com>
Date:   Thu, 23 Nov 2023 16:24:48 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Boerge Struempfel <boerge.struempfel@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, bstruempfel@...ratronik.de
Subject: Re: [PATCH] gpiolib: sysfs: Fix improper error handling on failed export

On Thu, Nov 23, 2023 at 3:30 PM Boerge Struempfel
<boerge.struempfel@...il.com> wrote:
>
> If gpio_set_transitory fails, we should free the gpio again. Most

We refer to functions as func() in the text and comments (note parentheses).

GPIO

> notably, the flag FLAG_REQUESTED has previously been set in
> gpiod_request_commit, and should be reset on failure.

Same about func().

...

Seems the correct fix, but you may also add that no existing user is
returning anything except 0 or ENOTSUPP that is converted to 0 in
GPIOLIB core code. Hence no Fixes tag is needed, but still possible if
maintainers want it.

-- 
With Best Regards,
Andy Shevchenko