Revert "[PATCH] USB: convert usb class devices to real devices"

This reverts bd00949647ddcea47ce4ea8bb2cfcfc98ebf9f2a commit because it
required a newer version of udev to work properly than what is currently
documented in Documentation/Changes.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/file.c

@@ -194,13 +194,14 @@ int usb_register_dev(struct usb_interface *intf,
 		++temp;
 	else
 		temp = name;
-	intf->usb_dev = device_create(usb_class->class, &intf->dev,
-				      MKDEV(USB_MAJOR, minor), "%s", temp);
-	if (IS_ERR(intf->usb_dev)) {
+	intf->class_dev = class_device_create(usb_class->class, NULL,
+					      MKDEV(USB_MAJOR, minor),
+					      &intf->dev, "%s", temp);
+	if (IS_ERR(intf->class_dev)) {
 		spin_lock (&minor_lock);
 		usb_minors[intf->minor] = NULL;
 		spin_unlock (&minor_lock);
-		retval = PTR_ERR(intf->usb_dev);
+		retval = PTR_ERR(intf->class_dev);
 	}
 exit:
 	return retval;
@@ -241,8 +242,8 @@ void usb_deregister_dev(struct usb_interface *intf,
 	spin_unlock (&minor_lock);
 
 	snprintf(name, BUS_ID_SIZE, class_driver->name, intf->minor - minor_base);
-	device_destroy(usb_class->class, MKDEV(USB_MAJOR, intf->minor));
-	intf->usb_dev = NULL;
+	class_device_destroy(usb_class->class, MKDEV(USB_MAJOR, intf->minor));
+	intf->class_dev = NULL;
 	intf->minor = -1;
 	destroy_usb_class();
 }

include/linux/usb.h

@@ -103,8 +103,7 @@ enum usb_interface_condition {
  * @condition: binding state of the interface: not bound, binding
  *	(in probe()), bound to a driver, or unbinding (in disconnect())
  * @dev: driver model's view of this device
- * @usb_dev: if an interface is bound to the USB major, this will point
- *	to the sysfs representation for that device.
+ * @class_dev: driver model's class view of this device.
  *
  * USB device drivers attach to interfaces on a physical device.  Each
  * interface encapsulates a single high level function, such as feeding
@@ -144,7 +143,7 @@ struct usb_interface {
 					 * bound to */
 	enum usb_interface_condition condition;		/* state of binding */
 	struct device dev;		/* interface specific device info */
-	struct device *usb_dev;		/* pointer to the usb class's device, if any */
+	struct class_device *class_dev;
 };
 #define	to_usb_interface(d) container_of(d, struct usb_interface, dev)
 #define	interface_to_usbdev(intf) \