Pull acpi_bus_register_driver into release branch
[sfrench/cifs-2.6.git] / drivers / acpi / scan.c
index a5fa85832fa377cc652e260683e813e10a939236..fc676ac0e3edbbce6c71e0a1964c7ddccd42a7b0 100644 (file)
@@ -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);