linux-kernel - Re: [PATCH] x86/reboot/quirks: Add Zotac ZBOX CI327 nano PCI reboot quirk

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Message-ID: <706c9de3-57de-9a82-737f-842f972ec596@gmail.com>
Date:   Thu, 10 Dec 2020 21:32:34 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/reboot/quirks: Add Zotac ZBOX CI327 nano PCI reboot
 quirk

Am 10.12.2020 um 20:04 schrieb Borislav Petkov:
> On Tue, Dec 01, 2020 at 12:39:57PM +0100, Heiner Kallweit wrote:
>> On this system the M.2 PCIe WiFi card isn't detected after reboot,
>> only after cold boot. reboot=pci fixes this behavior.
>> In [0] the same issue is described, although on another system and
>> with another Intel WiFi card. In case it's relevant, both systems
>> have Celeron CPU's.
>> The dicussion in [0] involved the PCI maintainer, and proposal was
>> to go with the PCI reboot quirk on affected systems until a more
>> generic fix is available.
>>
>> [0] https://bugzilla.kernel.org/show_bug.cgi?id=202399
> 
> But this quirk is for your system only - the one in the bugzilla entry
> would need another one? Or?
> 
Right, as Bjorn wrote in comment 14:
".., and there may be many systems with this issue and we may be adding
such quirks frequently.  But maybe that's the only option, since we
don't know any other way to fix this."

I'd prefer that the autor of a quirk also has the hw to test it on.
Therefore I just added the quirk for my system as a template to the
bug report.

> Thx.
> 

Heiner