linux-kernel - [regression] mei: me: allow runtime pm for platform with D0i3

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Message-ID: <20190123104242.GA12532@laptop.jcline.org>
Date:   Wed, 23 Jan 2019 11:42:42 +0100
From:   Jeremy Cline <jcline@...hat.com>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kamil Páral <kparal@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: [regression] mei: me: allow runtime pm for platform with D0i3

Hi folks,

Fedora has received a number of reports of e1000e-driven ethernet ports
negotiating 10Mbps links if the cable is disconnected and reconnected
after boot on a number of laptops, including the Lenovo T480s[0].

Kamil git-bisected the issue to commit cc365dcf0e56 ("mei: me: allow
runtime pm for platform with D0i3") and has confirmed that reverting
that commit in v4.20 fixes the issue.

[0] https://bugzilla.redhat.com/show_bug.cgi?id=1627816

Regards,
Jeremy