netdev - Re: [EXT] Re: [Intel-wired-lan] Intel I350 regression 5.10 -> 5.14 ("The NVM Checksum Is Not Valid") [8086:1521]

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Date:   Tue, 12 Oct 2021 19:58:47 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     "Andreas K. Huettel" <andreas.huettel@...de>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        netdev <netdev@...r.kernel.org>,
        intel-wired-lan@...ts.osuosl.org, Jakub Kicinski <kubakici@...pl>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [EXT] Re: [Intel-wired-lan] Intel I350 regression 5.10 -> 5.14
 ("The NVM Checksum Is Not Valid") [8086:1521]

On Tue, Oct 12, 2021 at 7:42 PM Paul Menzel <pmenzel@...gen.mpg.de> wrote:
>
> [Cc: +ACPI maintainers]
>
> Am 12.10.21 um 18:34 schrieb Andreas K. Huettel:
> >>> The messages easily identifiable are:
> >>>
> >>> huettel@...acolada ~/tmp $ cat kernel-messages-5.10.59.txt |grep igb
> >>> Oct  5 15:11:18 dilfridge kernel: [    2.090675] igb: Intel(R) Gigabit Ethernet Network Driver
> >>> Oct  5 15:11:18 dilfridge kernel: [    2.090676] igb: Copyright (c) 2007-2014 Intel Corporation.
> >>> Oct  5 15:11:18 dilfridge kernel: [    2.090728] igb 0000:01:00.0: enabling device (0000 -> 0002)
> >>
> >> This line is missing below, it indicates that the kernel couldn't or
> >> didn't power up the PCIe for some reason. We're looking for something
> >> like ACPI or PCI patches (possibly PCI-Power management) to be the
> >> culprit here.
> >
> > So I did a git bisect from linux-v5.10 (good) to linux-v5.14.11 (bad).
> >
> > The result was:
> >
> > dilfridge /usr/src/linux-git # git bisect bad
> > 6381195ad7d06ef979528c7452f3ff93659f86b1 is the first bad commit
> > commit 6381195ad7d06ef979528c7452f3ff93659f86b1
> > Author: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > Date:   Mon May 24 17:26:16 2021 +0200
> >
> >      ACPI: power: Rework turning off unused power resources
> > [...]
> >
> > I tried naive reverting of this commit on top of 5.14.11. That applies nearly cleanly,
> > and after a reboot the additional ethernet interfaces show up with their MAC in the
> > boot messages.
> >
> > (Not knowing how safe that experiment was, I did not go further than single mode and
> > immediately rebooted into 5.10 afterwards.)

Reverting this is rather not an option, because the code before it was
a one-off fix of an earlier issue, but it should be fixable given some
more information.

Basically, I need a boot log from both the good and bad cases and the
acpidump output from the affected machine.