ACPI: power: add struct acpi_device to struct acpi_power_resource

- Use it instead of acpi_bus_get_device() where we can..

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 224f729f700e..2b61719d680b 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -71,6 +71,7 @@ static struct acpi_driver acpi_power_driver = {
 
 struct acpi_power_resource {
         acpi_handle handle;
+        struct acpi_device * device;
         acpi_bus_id name;
         u32 system_level;
         u32 order;
@@ -203,10 +204,8 @@ static int acpi_power_on(acpi_handle handle)
                 return -ENOEXEC;
 
         /* Update the power resource's _device_ power state */
-        result = acpi_bus_get_device(resource->handle, &device);
-        if (result)
-                return result;
-        device->power.state = ACPI_STATE_D0;
+        device = resource->device;
+        resource->device->power.state = ACPI_STATE_D0;
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] turned on\n",
                           resource->name));
@@ -253,9 +252,7 @@ static int acpi_power_off_device(acpi_handle handle)
                 return -ENOEXEC;
 
         /* Update the power resource's _device_ power state */
-        result = acpi_bus_get_device(resource->handle, &device);
-        if (result)
-                return result;
+        device = resource->device;
         device->power.state = ACPI_STATE_D3;
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] turned off\n",
@@ -545,6 +542,7 @@ static int acpi_power_add(struct acpi_device *device)
         memset(resource, 0, sizeof(struct acpi_power_resource));
 
         resource->handle = device->handle;
+        resource->device = device;
         strcpy(resource->name, device->pnp.bus_id);
         strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
         strcpy(acpi_device_class(device), ACPI_POWER_CLASS);