[PATCH] USB: take out private pointer from struct usb_serial_port

The struct device pointer should be used instead.

drivers/usb/serial/usb-serial.h

@@ -90,9 +90,6 @@
  * @work: work queue entry for the line discipline waking up.
  * @open_count: number of times this port has been opened.
  * @sem: struct semaphore used to lock this structure.
- * @private: place to put any driver specific information that is needed.  The
- *	usb-serial driver is required to manage this data, the usb-serial core
- *	will not touch this.
  *
  * This structure is used by the usb-serial core and drivers for the specific
  * ports of a device.
@@ -120,11 +117,21 @@ struct usb_serial_port {
 	struct work_struct	work;
 	int			open_count;
 	struct semaphore	sem;
-	void *			private;
 	struct device		dev;
 };
 #define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
 
+/* get and set the port private data pointer helper functions */
+static inline void *usb_get_serial_port_data (struct usb_serial_port *port)
+{
+	return dev_get_drvdata(&port->dev);
+}
+
+static inline void usb_set_serial_port_data (struct usb_serial_port *port, void *data)
+{
+	dev_set_drvdata(&port->dev, data);
+}
+
 /**
  * usb_serial - structure used by the usb-serial core for a device
  * @magic: magic number for internal validity of this pointer.