linux-kernel - [PATCH 0/2] ACPI: PM: Fix two issues in acpi_device_set

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Date:   Tue, 25 Jun 2019 14:03:17 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Zhang Rui <rui.zhang@...el.com>
Subject: [PATCH 0/2] ACPI: PM: Fix two issues in acpi_device_set_power()

Hi All,

There are two, arguably minor, issues in acpi_device_set_power() that have been
introduced while making the code follow the ACPI 6 recommendations.

One of them is that, if the device is in D3hot, transitioning it into D3cold only
involves dropping references to some power resources and it should not
involve evaluating _PS3 which may happen currently.

The second one is that it sometimes is necessary to update the power state
of a device to D0 even if it was put into D0 previously, so that needs to be
possible.

Please refer to the patch changelogs for details.

Thanks,
Rafael