Pull acpi_bus_register_driver into release branch

Conflicts:

	drivers/acpi/asus_acpi.c
	drivers/acpi/scan.c

1 files changed, 9 insertions, 25 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index a5fa85832fa..fc676ac0e3e 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -142,7 +142,7 @@ static void acpi_device_register(struct acpi_device *device,
 	create_sysfs_device_files(device);
 }
 
-static int acpi_device_unregister(struct acpi_device *device, int type)
+static void acpi_device_unregister(struct acpi_device *device, int type)
 {
 	spin_lock(&acpi_device_lock);
 	if (device->parent) {
@@ -158,7 +158,6 @@ static int acpi_device_unregister(struct acpi_device *device, int type)
 	acpi_detach_data(device->handle, acpi_bus_data_handler);
 	remove_sysfs_device_files(device);
 	kobject_unregister(&device->kobj);
-	return 0;
 }
 
 void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context)
@@ -537,10 +536,9 @@ static int acpi_start_single_object(struct acpi_device *device)
 	return_VALUE(result);
 }
 
-static int acpi_driver_attach(struct acpi_driver *drv)
+static void acpi_driver_attach(struct acpi_driver *drv)
 {
 	struct list_head *node, *next;
-	int count = 0;
 
 	ACPI_FUNCTION_TRACE("acpi_driver_attach");
 
@@ -557,7 +555,6 @@ static int acpi_driver_attach(struct acpi_driver *drv)
 			if (!acpi_bus_driver_init(dev, drv)) {
 				acpi_start_single_object(dev);
 				atomic_inc(&drv->references);
-				count++;
 				ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 						  "Found driver [%s] for device [%s]\n",
 						  drv->name, dev->pnp.bus_id));
@@ -566,10 +563,9 @@ static int acpi_driver_attach(struct acpi_driver *drv)
 		spin_lock(&acpi_device_lock);
 	}
 	spin_unlock(&acpi_device_lock);
-	return_VALUE(count);
 }
 
-static int acpi_driver_detach(struct acpi_driver *drv)
+static void acpi_driver_detach(struct acpi_driver *drv)
 {
 	struct list_head *node, *next;
 
@@ -591,7 +587,6 @@ static int acpi_driver_detach(struct acpi_driver *drv)
 		}
 	}
 	spin_unlock(&acpi_device_lock);
-	return_VALUE(0);
 }
 
 /**
@@ -599,28 +594,22 @@ static int acpi_driver_detach(struct acpi_driver *drv)
  * @driver: driver being registered
  *
  * Registers a driver with the ACPI bus.  Searches the namespace for all
- * devices that match the driver's criteria and binds.  Returns the
- * number of devices that were claimed by the driver, or a negative
- * error status for failure.
+ * devices that match the driver's criteria and binds.  Returns zero for
+ * success or a negative error status for failure.
  */
 int acpi_bus_register_driver(struct acpi_driver *driver)
 {
-	int count;
-
 	ACPI_FUNCTION_TRACE("acpi_bus_register_driver");
 
 	if (acpi_disabled)
 		return_VALUE(-ENODEV);
 
-	if (!driver)
-		return_VALUE(-EINVAL);
-
 	spin_lock(&acpi_device_lock);
 	list_add_tail(&driver->node, &acpi_bus_drivers);
 	spin_unlock(&acpi_device_lock);
-	count = acpi_driver_attach(driver);
+	acpi_driver_attach(driver);
 
-	return_VALUE(count);
+	return_VALUE(0);
 }
 
 EXPORT_SYMBOL(acpi_bus_register_driver);
@@ -632,13 +621,8 @@ EXPORT_SYMBOL(acpi_bus_register_driver);
  * Unregisters a driver with the ACPI bus.  Searches the namespace for all
  * devices that match the driver's criteria and unbinds.
  */
-int acpi_bus_unregister_driver(struct acpi_driver *driver)
+void acpi_bus_unregister_driver(struct acpi_driver *driver)
 {
-	ACPI_FUNCTION_TRACE("acpi_bus_unregister_driver");
-
-	if (!driver)
-		return_VALUE(-EINVAL);
-
 	acpi_driver_detach(driver);
 
 	if (!atomic_read(&driver->references)) {
@@ -646,7 +630,7 @@ int acpi_bus_unregister_driver(struct acpi_driver *driver)
 		list_del_init(&driver->node);
 		spin_unlock(&acpi_device_lock);
 	}
-	return_VALUE(0);
+	return;
 }
 
 EXPORT_SYMBOL(acpi_bus_unregister_driver);