Merge branches 'acpi-processor', 'acpi-hotplug', 'acpi-init', 'acpi-pm' and 'acpica'

[~andy/linux] / drivers / acpi / device_pm.c

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index c14aa9a8a1b9e29d3ff9219de38f717ba624cea6..c14a00d3dca61e5d943c41d5fe11fb90669550a6 100644 (file)
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -256,6 +256,8 @@ int acpi_bus_init_power(struct acpi_device *device)
                return -EINVAL;
 
        device->power.state = ACPI_STATE_UNKNOWN;
+       if (!acpi_device_is_present(device))
+               return 0;
 
        result = acpi_device_get_power(device, &state);
        if (result)
@@ -302,15 +304,18 @@ int acpi_device_fix_up_power(struct acpi_device *device)
        return ret;
 }
 
-int acpi_bus_update_power(acpi_handle handle, int *state_p)
+int acpi_device_update_power(struct acpi_device *device, int *state_p)
 {
-       struct acpi_device *device;
        int state;
        int result;
 
-       result = acpi_bus_get_device(handle, &device);
-       if (result)
+       if (device->power.state == ACPI_STATE_UNKNOWN) {
+               result = acpi_bus_init_power(device);
+               if (!result && state_p)
+                       *state_p = device->power.state;
+
                return result;
+       }
 
        result = acpi_device_get_power(device, &state);
        if (result)
@@ -338,6 +343,15 @@ int acpi_bus_update_power(acpi_handle handle, int *state_p)
 
        return 0;
 }
+
+int acpi_bus_update_power(acpi_handle handle, int *state_p)
+{
+       struct acpi_device *device;
+       int result;
+
+       result = acpi_bus_get_device(handle, &device);
+       return result ? result : acpi_device_update_power(device, state_p);
+}
 EXPORT_SYMBOL_GPL(acpi_bus_update_power);
 
 bool acpi_bus_power_manageable(acpi_handle handle)