linux-kernel - Re: [PATCH v9 4/4] rtc: ds1307: add frequency_test_enable sysfs attribute to check tick on m41txx

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Message-ID: <CAHp75VchXfm6J+PPcB8ekoXcDktsPUNok3KKBMFyyk9XV=AUyQ@mail.gmail.com>
Date:   Wed, 18 Jul 2018 19:26:03 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Giulio Benetti <giulio.benetti@...ronovasrl.com>
Cc:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        "open list:REAL TIME CLOCK (RTC) SUBSYSTEM" 
        <linux-rtc@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 4/4] rtc: ds1307: add frequency_test_enable sysfs
 attribute to check tick on m41txx

On Wed, Jul 18, 2018 at 5:06 PM, Giulio Benetti
<giulio.benetti@...ronovasrl.com> wrote:

>>> +       int ret;
>>> +
>>> +       ret = kstrtobool(buf, &freq_test_en);
>>> +       if (ret == -EINVAL) {

>> What kind of other error code you may expect and why they are not
>> considered as no error?

> According to documentation, kstrtobool can only fail with -EINVAL.
> See:
> https://elixir.bootlin.com/linux/v4.18-rc5/source/lib/kstrtox.c#L332

That's correct. So, what do you want to show by explicitly mentioned
an error code in the condition?

-- 
With Best Regards,
Andy Shevchenko