linux-kernel - Re: [PATCH] watchdog: iTCO_wdt: Fix detection of SMI-off case

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Message-ID: <175ca7d9-254b-ca35-359c-a077b284c9fa@siemens.com>
Date:   Mon, 26 Jul 2021 19:10:25 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        linux-watchdog@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Christian Storm <christian.storm@...mens.com>,
        Mantas Mikulėnas <grawity@...il.com>
Subject: Re: [PATCH] watchdog: iTCO_wdt: Fix detection of SMI-off case

On 26.07.21 16:51, Andy Shevchenko wrote:
> On Mon, Jul 26, 2021 at 5:05 PM Jan Kiszka <jan.kiszka@...mens.com> wrote:
>>
>> On 26.07.21 15:59, Guenter Roeck wrote:
>>> On 7/26/21 6:40 AM, Andy Shevchenko wrote:
>>>> On Mon, Jul 26, 2021 at 3:04 PM Jan Kiszka <jan.kiszka@...mens.com>
>>>> wrote:
>>>>>
>>>>> On 26.07.21 14:01, Andy Shevchenko wrote:
>>>>>> On Mon, Jul 26, 2021 at 2:46 PM Jan Kiszka <jan.kiszka@...mens.com>
>>>>>> wrote:
>>>>>>>
>>>>>>> From: Jan Kiszka <jan.kiszka@...mens.com>
>>>>>>>
>>>>>>> Obviously, the test needs to run against the register content, not its
>>>>>>> address.
>>>>>>>
>>>>>>> Fixes: cb011044e34c ("watchdog: iTCO_wdt: Account for rebooting on
>>>>>>> second timeout")
>>>>>>> Reported-by: Mantas Mikulėnas <grawity@...il.com>
>>>>>>
>>>>>>> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
>>>>>>
>>>>>> Missed SoB of the submitter (hint: configure your Git to make sure
>>>>>> that submitter and author are the same in terms of name-email).
>>>>>
>>>>> The signed off is there. Not sure what you are referring to.
>>>>
>>>> Nope. It's not. The sign of that is the From: line in the body of the
>>>> email. It happens when the submitter != author. And SoB of the former
>>>> one is absent. But what is strange is that reading them here I haven't
>>>> found the difference. Maybe one is in UTF-8 while the other is not and
>>>> a unicode character degraded to Latin-1 or so?
>>>>
>>>
>>> I have no idea why there is an additional From:, but both From:
>>> tags in the e-mail source are exact matches, and both match the
>>> name and e-mail address in Signed-off-by:. I agree with Jan,
>>> the SoB is there.
>>
>> There is one unknown in this equation, and that is the anti-email system
>> operated by a our IT and some company in Redmond.
> 
> Hmm... The From: in the body is the result of the `git format-patch` I believe.
> So, two (or more?) possibilities here:
>  1) your configuration enforces it to always put From: (something new to me);

Yes, it does, as I explained in my other reply. That's a safety net
because you never have full control over what some mail servers do to
the first From.

>  2) the submitter and author are not the same (see also:
> https://github.com/git/git/commit/a90804752f6ab2b911882d47fafb6c2b78f447c3);
>  3) ...anything else...?
> 
>> But I haven't received
>> any complaints that my outgoing emails are negatively affected by it
>> (incoming are, but that's a different story...). If you received
>> something mangled, Andy, please share the source of that email. I'm
>> happy to escalate internally - and externally.
> 
> I believe I see it in the same way as lore, i.e.
> https://lore.kernel.org/linux-watchdog/d84f8e06-f646-8b43-d063-fb11f4827044@siemens.com/raw

Perfect, then all is fine as it should be (and no time for O365 bashing,
today).

Jan

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