USB: fixup handling of generic USB driver.

The generic driver is used by the virtual USB bridge device. This makes sure that
the driver is registered before we try to use it (and it gets the bus type right).

We also check for equality when matching devices to drivers, because we don't 
want to match any device to it. 

drivers/usb/core/usb.c

@@ -63,7 +63,8 @@ static void generic_release (struct device_driver * drv)
 }
 
 static struct device_driver usb_generic_driver = {
-	.name =	"generic usb driver",
+	.name =	"generic",
+	.bus = &usb_bus_type,
 	.probe = generic_probe,
 	.remove = generic_remove,
 	.release = generic_release,
@@ -470,6 +471,10 @@ static int usb_device_match (struct device *dev, struct device_driver *drv)
 	struct usb_driver *usb_drv;
 	const struct usb_device_id *id;
 
+	/* check for generic driver, which we don't match any device with */
+	if (drv == &usb_generic_driver)
+		return 0;
+
 	intf = to_usb_interface(dev);
 
 	usb_drv = to_usb_driver(drv);
@@ -1445,6 +1450,8 @@ static int __init usb_init(void)
 	usbfs_init();
 	usb_hub_init();
 
+	driver_register(&usb_generic_driver);
+
 	return 0;
 }
 
@@ -1453,6 +1460,7 @@ static int __init usb_init(void)
  */
 static void __exit usb_exit(void)
 {
+	remove_driver(&usb_generic_driver);
 	usb_major_cleanup();
 	usbfs_cleanup();
 	usb_hub_cleanup();