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Message-ID: <ded3e7ae-6a7d-48b2-8acc-c125874ee09f@leemhuis.info>
Date: Fri, 26 Apr 2024 08:25:22 +0200
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Subject: Re: [Intel-wired-lan] [PATCH iwl-net v1 1/1] e1000e: change
 usleep_range to udelay in PHY mdic access
To: Sasha Neftin <sasha.neftin@intel.com>,
 Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>, netdev
 <netdev@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
 Linux kernel regressions list <regressions@lists.linux.dev>,
 Vitaly Lifshits <vitaly.lifshits@intel.com>, intel-wired-lan@osuosl.org
References: <20240417190320.3159360-1-vitaly.lifshits@intel.com>
From: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@leemhuis.info>
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[CCing the maintainers and a few lists]

On 17.04.24 21:03, Vitaly Lifshits wrote:
> This is a partial revert of commit 6dbdd4de0362 ("e1000e: Workaround
> for sporadic MDI error on Meteor Lake systems"). The referenced commit
> introduced an issue on vPro systems, where disconnecting and reconnecting
> the LAN cable might result in a kernel panic.
> 
> This was root caused to the usage of usleep_range in an atomic content
> while trying to access the PHY. Change back the usleep_range calls to
> udelay.
>
> Fixes: 6dbdd4de0362 ("e1000e: Workaround for sporadic MDI error on Meteor Lake systems")

Hi everyone. What's the status here? It seems like this regression fix
did not make any progress for about a week. Which is not really ideal,
as the issue afaics causes quite a few people headaches, as a quick and
rough search indicates (there might be some false positives in here):

https://bugzilla.kernel.org/show_bug.cgi?id=218740
https://bugzilla.suse.com/show_bug.cgi?id=1223109
https://bugzilla.suse.com/show_bug.cgi?id=1222945
https://bbs.archlinux.org/viewtopic.php?id=294913
https://bbs.archlinux.org/viewtopic.php?id=294828
https://forum.manjaro.org/t/networkmanager-stability-issues-since-latest-update/159960
https://discussion.fedoraproject.org/t/kernel-6-8-5-stops-at-splash-screen/113519
https://bugzilla.redhat.com/show_bug.cgi?id=2276325
https://bugzilla.redhat.com/show_bug.cgi?id=2276852
https://www.reddit.com/r/voidlinux/comments/1c9s8ut/bug_scheduling_while_atomic/

Side note: would be nice to add these tags to the patch
description, too:

 Reported-by: Jérôme Carretero <cJ@zougloub.eu>
 Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218740
 Closes: https://lore.kernel.org/lkml/a7eb665c74b5efb5140e6979759ed243072cb24a.camel@zougloub.eu/ 

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
If I did something stupid, please tell me, as explained on that page.