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ACPI: PM: Let acpi_dev_pm_attach() skip devices without ACPI PM

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It is pointless to attach the generic ACPI PM domain to devices whose
ACPI companions don't support ACPI power management and don't have a
wakeup GPE, so update acpi_dev_pm_attach() to skip such devices.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/5050298.GXAFRqVoOG@rafael.j.wysocki
This commit is contained in:
Rafael J. Wysocki 2026-01-10 12:57:00 +01:00
parent b8c8a8ea18
commit 88fad6ce09
1 changed files with 9 additions and 0 deletions
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9
drivers/acpi/device_pm.c
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@ -1457,6 +1457,15 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on)
if (!adev || !acpi_match_device_ids(adev, special_pm_ids))
return 0;
/*
* Skip devices whose ACPI companions don't support power management and
* don't have a wakeup GPE.
*/
if (!acpi_device_power_manageable(adev) && !acpi_device_can_wakeup(adev)) {
dev_dbg(dev, "No ACPI power management or wakeup GPE\n");
return 0;
}
/*
* Only attach the power domain to the first device if the
* companion is shared by multiple. This is to prevent doing power