linux-kernel - Re: [PATCH 2/2] gpiolib: Allow drivers to return EOPNOTSUPP from config

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Message-ID: <CAHp75VdXa2bkJ+ej+HNYstLeK4TF+L5H3wTgm0CgJ9hYQeU+ZQ@mail.gmail.com>
Date:   Mon, 29 Mar 2021 14:59:02 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Joe Perches <joe@...ches.com>
Cc:     Matti Vaittinen <mazziesaccount@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] gpiolib: Allow drivers to return EOPNOTSUPP from config

On Mon, Mar 29, 2021 at 2:43 PM Matti Vaittinen
<matti.vaittinen@...rohmeurope.com> wrote:
>
> The checkpacth instructs to switch from ENOSUPP to EOPNOTSUPP.
> > WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
>
> Make the gpiolib allow drivers to return both so driver developers
> can avoid one of the checkpatch complaints.

Internally we are fine to use the ENOTSUPP.
Checkpatch false positives there.

I doubt we need this change. Rather checkpatch should rephrase this to
point out that this is only applicable to _user-visible_ error path.
Cc'ed Joe.

-- 
With Best Regards,
Andy Shevchenko