1 files changed, 10 insertions, 22 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 669553553fbb..e8efaac71e74 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)
@@ -577,7 +576,7 @@ static void acpi_driver_attach(struct acpi_driver *drv)
         spin_unlock(&acpi_device_lock);
 }
 
-static int acpi_driver_detach(struct acpi_driver *drv)
+static void acpi_driver_detach(struct acpi_driver *drv)
 {
         struct list_head *node, *next;
 
@@ -599,7 +598,6 @@ static int acpi_driver_detach(struct acpi_driver *drv)
                 }
         }
         spin_unlock(&acpi_device_lock);
-        return_VALUE(0);
 }
 
 /**
@@ -617,9 +615,6 @@ int acpi_bus_register_driver(struct acpi_driver *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);
@@ -637,23 +632,16 @@ 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)
 {
-        int error = 0;
-
-        ACPI_FUNCTION_TRACE("acpi_bus_unregister_driver");
-
-        if (driver) {
-                acpi_driver_detach(driver);
+        acpi_driver_detach(driver);
 
-                if (!atomic_read(&driver->references)) {
-                        spin_lock(&acpi_device_lock);
-                        list_del_init(&driver->node);
-                        spin_unlock(&acpi_device_lock);
-                }
-        } else
-                error = -EINVAL;
-        return_VALUE(error);
+        if (!atomic_read(&driver->references)) {
+                spin_lock(&acpi_device_lock);
+                list_del_init(&driver->node);
+                spin_unlock(&acpi_device_lock);
+        }
+        return;
 }
 
 EXPORT_SYMBOL(acpi_bus_unregister_driver);