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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>
Sat, 21 Dec 2019 09:35:28 +0000 (10:35 +0100)
commitd59b991b48acddb528472f0d4467514c86cef26d
tree9479f4cc81adc1fec5309ce77758153ff284d80d
parent45e64c927533394ff9427a93587998859c0fd77a
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