driver model: make sure driver is added to class it belongs to.

devclass_{add,remove}_driver() had been implemented, but had never been
called.

drivers/base/base.h

@@ -19,6 +19,9 @@ extern void bus_remove_driver(struct device_driver *);
 extern int devclass_add_device(struct device *);
 extern void devclass_remove_device(struct device *);
 
+extern int devclass_add_driver(struct device_driver *);
+extern void devclass_remove_driver(struct device_driver *);
+
 extern int interface_add(struct device_class *, struct device *);
 extern void interface_remove(struct device_class *, struct device *);
 

drivers/base/driver.c

@@ -118,6 +118,7 @@ int driver_register(struct device_driver * drv)
 	INIT_LIST_HEAD(&drv->devices);
 	drv->present = 1;
 	bus_add_driver(drv);
+	devclass_add_driver(drv);
 	put_driver(drv);
 	return 0;
 }
@@ -128,6 +129,9 @@ void driver_unregister(struct device_driver * drv)
 	drv->present = 0;
 	spin_unlock(&device_lock);
 	pr_debug("driver %s:%s: unregistering\n",drv->bus->name,drv->name);
+	bus_remove_driver(drv);
+	devclass_remove_driver(drv);
+	kobject_unregister(&drv->kobj);
 	put_driver(drv);
 }