ACPI: PM: Avoid attaching ACPI PM domain to certain devices
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: e5cc8ef312
(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>
This commit is contained in:
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Коммит
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@ -1314,9 +1314,19 @@ static void acpi_dev_pm_detach(struct device *dev, bool power_off)
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*/
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int acpi_dev_pm_attach(struct device *dev, bool power_on)
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{
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/*
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* Skip devices whose ACPI companions match the device IDs below,
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* because they require special power management handling incompatible
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* with the generic ACPI PM domain.
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*/
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static const struct acpi_device_id special_pm_ids[] = {
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{"PNP0C0B", }, /* Generic ACPI fan */
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{"INT3404", }, /* Fan */
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{}
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};
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struct acpi_device *adev = ACPI_COMPANION(dev);
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if (!adev)
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if (!adev || !acpi_match_device_ids(adev, special_pm_ids))
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return 0;
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/*
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