ACPI / PM: Add function for device power state initialization
Add function acpi_bus_init_power() for getting the initial power
state of an ACPI device and reference counting its power resources
as appropriate.
Make acpi_bus_get_power_flags() use the new function instead of
acpi_bus_get_power() that updates device->power.state without
reference counting the device's power resources.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 29ef505..ef8e659 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -901,10 +901,7 @@
device->power.states[ACPI_STATE_D3].flags.valid = 1;
device->power.states[ACPI_STATE_D3].power = 0;
- /* TBD: System wake support and resource requirements. */
-
- device->power.state = ACPI_STATE_UNKNOWN;
- acpi_bus_get_power(device->handle, &(device->power.state));
+ acpi_bus_init_power(device);
return 0;
}