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

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Message-ID: <CAHp75VdqS5QUwq=25RGKOiPRfcNzNxG9kNMtP-2-=z4EAnUi8w@mail.gmail.com>
Date:   Mon, 26 Jul 2021 17:51:51 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Jan Kiszka <jan.kiszka@...mens.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 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);
 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

> For the potential case they were mangled or in case I'm submitting via a
> real email provider, my scripts always add a "From:" to the body of my
> patches. Outgoing, that From matched my Signed-off.


-- 
With Best Regards,
Andy Shevchenko