Commit 88fad6ce authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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



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: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/5050298.GXAFRqVoOG@rafael.j.wysocki
parent b8c8a8ea

drivers/acpi/device_pm.c

+9 −0
Original line number Diff line number Diff line
@@ -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