OSDN Git Service

ACPI: PM: Avoid attaching ACPI PM domain to certain devices
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 4 Dec 2019 01:54:27 +0000 (02:54 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 17 Dec 2019 19:35:06 +0000 (20:35 +0100)
commit24f41534919509450ae4f9b3e4e17c014ffef2dd
treebdf1c3d07cbbbb006df4704eee58fa75b3c3431f
parent1309b43650dee26d16f21fe69e6060e42a48d005
ACPI: PM: Avoid attaching ACPI PM domain to certain devices

commit b9ea0bae260f6aae546db224daa6ac1bd9d94b91 upstream.

Certain ACPI-enumerated devices represented as platform devices in
Linux, like fans, require special low-level power management handling
implemented by their drivers that is not in agreement with the ACPI
PM domain behavior.  That leads to problems with managing ACPI fans
during system-wide suspend and resume.

For this reason, make acpi_dev_pm_attach() skip the affected devices
by adding a list of device IDs to avoid to it and putting the IDs of
the affected devices into that list.

Fixes: e5cc8ef31267 (ACPI / PM: Provide ACPI PM callback routines for subsystems)
Reported-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Cc: 3.10+ <stable@vger.kernel.org> # 3.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/acpi/device_pm.c