linux-kernel - Re: [PATCH v1 02/28] leds: core: The -ENOTSUPP should never be seen by user space

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Message-ID: <CAHp75VfdLRq7YUVuy=gf+Q42jwmmYRt=G-cwXcLJ60DG2tuurA@mail.gmail.com>
Date:   Sat, 29 May 2021 12:42:33 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Pavel Machek <pavel@....cz>
Cc:     Amireddy Mallikarjuna reddy <mallikarjunax.reddy@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Marek Behún <marek.behun@....cz>,
        Abanoub Sameh <abanoubsameh8@...il.com>,
        Dan Murphy <dmurphy@...com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jacek Anaszewski <j.anaszewski@...sung.com>
Subject: Re: [PATCH v1 02/28] leds: core: The -ENOTSUPP should never be seen
 by user space

On Fri, May 28, 2021 at 1:43 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Fri, May 28, 2021 at 12:03:39PM +0200, Pavel Machek wrote:
> > On Mon 2021-05-10 12:50:19, Andy Shevchenko wrote:
> > > Replace -ENOTSUPP by -EOPNOTSUPP when returning from exported function.
> > >
> > > Fixes: 13ae79bbe4c2 ("leds: core: Drivers shouldn't enforce SYNC/ASYNC brightness setting")
> > > Cc: Jacek Anaszewski <j.anaszewski@...sung.com>
> > > Signed-off-by: Andy Shevchenko <andy.shevchenko@...il.com>
> >
> > Are you sure this is real problem?
>
> (Potential) real problem, yes.
>
> » This does not sound like an error
> > path that should happen.
>
> Before crafting this patch I have checked callers and _luckily_ they haven't
> tested the returned code. But if any of the user decides to check -> real
> problem.

I have rephrased the commit message to point out the above.

-- 
With Best Regards,
Andy Shevchenko