ACPI_DEVICE_POWER
ad->ad_flags |= ACPI_DEVICE_POWER;
(ad->ad_parent->ad_flags & ACPI_DEVICE_POWER) != 0) {
KASSERT((ad->ad_flags & ACPI_DEVICE_POWER) != 0);
if ((ad->ad_flags & ACPI_DEVICE_POWER) != 0)