diff --git a/drivers/staging/uc2322/aten2011.c b/drivers/staging/uc2322/aten2011.c
index 9c62f787cc9c..39d0926d1a90 100644
--- a/drivers/staging/uc2322/aten2011.c
+++ b/drivers/staging/uc2322/aten2011.c
@@ -2336,7 +2336,7 @@ static int ATEN2011_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void ATEN2011_shutdown(struct usb_serial *serial)
+static void ATEN2011_release(struct usb_serial *serial)
 {
 	int i;
 	struct ATENINTL_port *ATEN2011_port;
@@ -2382,7 +2382,7 @@ static struct usb_serial_driver aten_serial_driver = {
 	.tiocmget =		ATEN2011_tiocmget,
 	.tiocmset =		ATEN2011_tiocmset,
 	.attach =		ATEN2011_startup,
-	.shutdown =		ATEN2011_shutdown,
+	.release =		ATEN2011_release,
 	.read_bulk_callback =	ATEN2011_bulk_in_callback,
 	.read_int_callback =	ATEN2011_interrupt_callback,
 };
diff --git a/drivers/usb/serial/aircable.c b/drivers/usb/serial/aircable.c
index 6d106e74265e..2cbfab3716e5 100644
--- a/drivers/usb/serial/aircable.c
+++ b/drivers/usb/serial/aircable.c
@@ -364,7 +364,7 @@ static int aircable_attach(struct usb_serial *serial)
 	return 0;
 }
 
-static void aircable_shutdown(struct usb_serial *serial)
+static void aircable_release(struct usb_serial *serial)
 {
 
 	struct usb_serial_port *port = serial->port[0];
@@ -375,7 +375,6 @@ static void aircable_shutdown(struct usb_serial *serial)
 	if (priv) {
 		serial_buf_free(priv->tx_buf);
 		serial_buf_free(priv->rx_buf);
-		usb_set_serial_port_data(port, NULL);
 		kfree(priv);
 	}
 }
@@ -601,7 +600,7 @@ static struct usb_serial_driver aircable_device = {
 	.num_ports =		1,
 	.attach =		aircable_attach,
 	.probe =		aircable_probe,
-	.shutdown =		aircable_shutdown,
+	.release =		aircable_release,
 	.write =		aircable_write,
 	.write_room =		aircable_write_room,
 	.write_bulk_callback =	aircable_write_bulk_callback,
diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
index 2bfd6dd85b5a..7033b031b443 100644
--- a/drivers/usb/serial/belkin_sa.c
+++ b/drivers/usb/serial/belkin_sa.c
@@ -90,7 +90,7 @@ static int debug;
 
 /* function prototypes for a Belkin USB Serial Adapter F5U103 */
 static int  belkin_sa_startup(struct usb_serial *serial);
-static void belkin_sa_shutdown(struct usb_serial *serial);
+static void belkin_sa_release(struct usb_serial *serial);
 static int  belkin_sa_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp);
 static void belkin_sa_close(struct usb_serial_port *port);
@@ -142,7 +142,7 @@ static struct usb_serial_driver belkin_device = {
 	.tiocmget =		belkin_sa_tiocmget,
 	.tiocmset =		belkin_sa_tiocmset,
 	.attach =		belkin_sa_startup,
-	.shutdown =		belkin_sa_shutdown,
+	.release =		belkin_sa_release,
 };
 
 
@@ -197,14 +197,13 @@ static int belkin_sa_startup(struct usb_serial *serial)
 }
 
 
-static void belkin_sa_shutdown(struct usb_serial *serial)
+static void belkin_sa_release(struct usb_serial *serial)
 {
 	struct belkin_sa_private *priv;
 	int i;
 
 	dbg("%s", __func__);
 
-	/* stop reads and writes on all ports */
 	for (i = 0; i < serial->num_ports; ++i) {
 		/* My special items, the standard routines free my urbs */
 		priv = usb_get_serial_port_data(serial->port[i]);
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 16a154d3b2fe..2b9eeda62bfe 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -50,7 +50,7 @@ static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
 		unsigned int, unsigned int);
 static void cp210x_break_ctl(struct tty_struct *, int);
 static int cp210x_startup(struct usb_serial *);
-static void cp210x_shutdown(struct usb_serial *);
+static void cp210x_disconnect(struct usb_serial *);
 
 static int debug;
 
@@ -137,7 +137,7 @@ static struct usb_serial_driver cp210x_device = {
 	.tiocmget 		= cp210x_tiocmget,
 	.tiocmset		= cp210x_tiocmset,
 	.attach			= cp210x_startup,
-	.shutdown		= cp210x_shutdown,
+	.disconnect		= cp210x_disconnect,
 };
 
 /* Config request types */
@@ -792,7 +792,7 @@ static int cp210x_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void cp210x_shutdown(struct usb_serial *serial)
+static void cp210x_disconnect(struct usb_serial *serial)
 {
 	int i;
 
diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
index 933ba913e66c..336523fd7366 100644
--- a/drivers/usb/serial/cyberjack.c
+++ b/drivers/usb/serial/cyberjack.c
@@ -58,7 +58,8 @@ static int debug;
 
 /* Function prototypes */
 static int cyberjack_startup(struct usb_serial *serial);
-static void cyberjack_shutdown(struct usb_serial *serial);
+static void cyberjack_disconnect(struct usb_serial *serial);
+static void cyberjack_release(struct usb_serial *serial);
 static int  cyberjack_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp);
 static void cyberjack_close(struct usb_serial_port *port);
@@ -94,7 +95,8 @@ static struct usb_serial_driver cyberjack_device = {
 	.id_table =		id_table,
 	.num_ports =		1,
 	.attach =		cyberjack_startup,
-	.shutdown =		cyberjack_shutdown,
+	.disconnect =		cyberjack_disconnect,
+	.release =		cyberjack_release,
 	.open =			cyberjack_open,
 	.close =		cyberjack_close,
 	.write =		cyberjack_write,
@@ -148,17 +150,25 @@ static int cyberjack_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void cyberjack_shutdown(struct usb_serial *serial)
+static void cyberjack_disconnect(struct usb_serial *serial)
+{
+	int i;
+
+	dbg("%s", __func__);
+
+	for (i = 0; i < serial->num_ports; ++i)
+		usb_kill_urb(serial->port[i]->interrupt_in_urb);
+}
+
+static void cyberjack_release(struct usb_serial *serial)
 {
 	int i;
 
 	dbg("%s", __func__);
 
 	for (i = 0; i < serial->num_ports; ++i) {
-		usb_kill_urb(serial->port[i]->interrupt_in_urb);
 		/* My special items, the standard routines free my urbs */
 		kfree(usb_get_serial_port_data(serial->port[i]));
-		usb_set_serial_port_data(serial->port[i], NULL);
 	}
 }
 
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 669f93848539..9734085fd2fe 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -171,7 +171,7 @@ struct cypress_buf {
 static int  cypress_earthmate_startup(struct usb_serial *serial);
 static int  cypress_hidcom_startup(struct usb_serial *serial);
 static int  cypress_ca42v2_startup(struct usb_serial *serial);
-static void cypress_shutdown(struct usb_serial *serial);
+static void cypress_release(struct usb_serial *serial);
 static int  cypress_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp);
 static void cypress_close(struct usb_serial_port *port);
@@ -215,7 +215,7 @@ static struct usb_serial_driver cypress_earthmate_device = {
 	.id_table =			id_table_earthmate,
 	.num_ports =			1,
 	.attach =			cypress_earthmate_startup,
-	.shutdown =			cypress_shutdown,
+	.release =			cypress_release,
 	.open =				cypress_open,
 	.close =			cypress_close,
 	.dtr_rts =			cypress_dtr_rts,
@@ -242,7 +242,7 @@ static struct usb_serial_driver cypress_hidcom_device = {
 	.id_table =			id_table_cyphidcomrs232,
 	.num_ports =			1,
 	.attach =			cypress_hidcom_startup,
-	.shutdown =			cypress_shutdown,
+	.release =			cypress_release,
 	.open =				cypress_open,
 	.close =			cypress_close,
 	.dtr_rts =			cypress_dtr_rts,
@@ -269,7 +269,7 @@ static struct usb_serial_driver cypress_ca42v2_device = {
 	.id_table =			id_table_nokiaca42v2,
 	.num_ports =			1,
 	.attach =			cypress_ca42v2_startup,
-	.shutdown =			cypress_shutdown,
+	.release =			cypress_release,
 	.open =				cypress_open,
 	.close =			cypress_close,
 	.dtr_rts =			cypress_dtr_rts,
@@ -616,7 +616,7 @@ static int cypress_ca42v2_startup(struct usb_serial *serial)
 } /* cypress_ca42v2_startup */
 
 
-static void cypress_shutdown(struct usb_serial *serial)
+static void cypress_release(struct usb_serial *serial)
 {
 	struct cypress_private *priv;
 
@@ -629,7 +629,6 @@ static void cypress_shutdown(struct usb_serial *serial)
 	if (priv) {
 		cypress_buf_free(priv->buf);
 		kfree(priv);
-		usb_set_serial_port_data(serial->port[0], NULL);
 	}
 }
 
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 30f5140eff03..f4808091c47c 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -460,7 +460,8 @@ static int digi_carrier_raised(struct usb_serial_port *port);
 static void digi_dtr_rts(struct usb_serial_port *port, int on);
 static int digi_startup_device(struct usb_serial *serial);
 static int digi_startup(struct usb_serial *serial);
-static void digi_shutdown(struct usb_serial *serial);
+static void digi_disconnect(struct usb_serial *serial);
+static void digi_release(struct usb_serial *serial);
 static void digi_read_bulk_callback(struct urb *urb);
 static int digi_read_inb_callback(struct urb *urb);
 static int digi_read_oob_callback(struct urb *urb);
@@ -524,7 +525,8 @@ static struct usb_serial_driver digi_acceleport_2_device = {
 	.tiocmget =			digi_tiocmget,
 	.tiocmset =			digi_tiocmset,
 	.attach =			digi_startup,
-	.shutdown =			digi_shutdown,
+	.disconnect =			digi_disconnect,
+	.release =			digi_release,
 };
 
 static struct usb_serial_driver digi_acceleport_4_device = {
@@ -550,7 +552,8 @@ static struct usb_serial_driver digi_acceleport_4_device = {
 	.tiocmget =			digi_tiocmget,
 	.tiocmset =			digi_tiocmset,
 	.attach =			digi_startup,
-	.shutdown =			digi_shutdown,
+	.disconnect =			digi_disconnect,
+	.release =			digi_release,
 };
 
 
@@ -1556,16 +1559,23 @@ static int digi_startup(struct usb_serial *serial)
 }
 
 
-static void digi_shutdown(struct usb_serial *serial)
+static void digi_disconnect(struct usb_serial *serial)
 {
 	int i;
-	dbg("digi_shutdown: TOP, in_interrupt()=%ld", in_interrupt());
+	dbg("digi_disconnect: TOP, in_interrupt()=%ld", in_interrupt());
 
 	/* stop reads and writes on all ports */
 	for (i = 0; i < serial->type->num_ports + 1; i++) {
 		usb_kill_urb(serial->port[i]->read_urb);
 		usb_kill_urb(serial->port[i]->write_urb);
 	}
+}
+
+
+static void digi_release(struct usb_serial *serial)
+{
+	int i;
+	dbg("digi_release: TOP, in_interrupt()=%ld", in_interrupt());
 
 	/* free the private data structures for all ports */
 	/* number of regular ports + 1 for the out-of-band port */
diff --git a/drivers/usb/serial/empeg.c b/drivers/usb/serial/empeg.c
index 2b141ccb0cd9..80cb3471adbe 100644
--- a/drivers/usb/serial/empeg.c
+++ b/drivers/usb/serial/empeg.c
@@ -90,7 +90,6 @@ static int  empeg_chars_in_buffer(struct tty_struct *tty);
 static void empeg_throttle(struct tty_struct *tty);
 static void empeg_unthrottle(struct tty_struct *tty);
 static int  empeg_startup(struct usb_serial *serial);
-static void empeg_shutdown(struct usb_serial *serial);
 static void empeg_set_termios(struct tty_struct *tty,
 		struct usb_serial_port *port, struct ktermios *old_termios);
 static void empeg_write_bulk_callback(struct urb *urb);
@@ -124,7 +123,6 @@ static struct usb_serial_driver empeg_device = {
 	.throttle =		empeg_throttle,
 	.unthrottle =		empeg_unthrottle,
 	.attach =		empeg_startup,
-	.shutdown =		empeg_shutdown,
 	.set_termios =		empeg_set_termios,
 	.write =		empeg_write,
 	.write_room =		empeg_write_room,
@@ -427,12 +425,6 @@ static int  empeg_startup(struct usb_serial *serial)
 }
 
 
-static void empeg_shutdown(struct usb_serial *serial)
-{
-	dbg("%s", __func__);
-}
-
-
 static void empeg_set_termios(struct tty_struct *tty,
 		struct usb_serial_port *port, struct ktermios *old_termios)
 {
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index fc423583eede..3dc3768ca71c 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -720,7 +720,6 @@ static const char *ftdi_chip_name[] = {
 /* function prototypes for a FTDI serial converter */
 static int  ftdi_sio_probe(struct usb_serial *serial,
 					const struct usb_device_id *id);
-static void ftdi_shutdown(struct usb_serial *serial);
 static int  ftdi_sio_port_probe(struct usb_serial_port *port);
 static int  ftdi_sio_port_remove(struct usb_serial_port *port);
 static int  ftdi_open(struct tty_struct *tty,
@@ -779,7 +778,6 @@ static struct usb_serial_driver ftdi_sio_device = {
 	.ioctl =		ftdi_ioctl,
 	.set_termios =		ftdi_set_termios,
 	.break_ctl =		ftdi_break_ctl,
-	.shutdown =		ftdi_shutdown,
 };
 
 
@@ -1594,18 +1592,6 @@ static int ftdi_mtxorb_hack_setup(struct usb_serial *serial)
 	return 0;
 }
 
-/* ftdi_shutdown is called from usbserial:usb_serial_disconnect
- *   it is called when the usb device is disconnected
- *
- *   usbserial:usb_serial_disconnect
- *      calls __serial_close for each open of the port
- *      shutdown is called then (ie ftdi_shutdown)
- */
-static void ftdi_shutdown(struct usb_serial *serial)
-{
-	dbg("%s", __func__);
-}
-
 static void ftdi_sio_priv_release(struct kref *k)
 {
 	struct ftdi_private *priv = container_of(k, struct ftdi_private, kref);
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 5092d6aba659..8839f1c70b7f 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -1475,7 +1475,7 @@ static int garmin_attach(struct usb_serial *serial)
 }
 
 
-static void garmin_shutdown(struct usb_serial *serial)
+static void garmin_disconnect(struct usb_serial *serial)
 {
 	struct usb_serial_port *port = serial->port[0];
 	struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
@@ -1484,8 +1484,17 @@ static void garmin_shutdown(struct usb_serial *serial)
 
 	usb_kill_urb(port->interrupt_in_urb);
 	del_timer_sync(&garmin_data_p->timer);
+}
+
+
+static void garmin_release(struct usb_serial *serial)
+{
+	struct usb_serial_port *port = serial->port[0];
+	struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
+
+	dbg("%s", __func__);
+
 	kfree(garmin_data_p);
-	usb_set_serial_port_data(port, NULL);
 }
 
 
@@ -1504,7 +1513,8 @@ static struct usb_serial_driver garmin_device = {
 	.throttle            = garmin_throttle,
 	.unthrottle          = garmin_unthrottle,
 	.attach              = garmin_attach,
-	.shutdown            = garmin_shutdown,
+	.disconnect          = garmin_disconnect,
+	.release             = garmin_release,
 	.write               = garmin_write,
 	.write_room          = garmin_write_room,
 	.write_bulk_callback = garmin_write_bulk_callback,
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 8dabac1929b0..932d6241b787 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -63,7 +63,8 @@ struct usb_serial_driver usb_serial_generic_device = {
 	.id_table =		generic_device_ids,
 	.usb_driver = 		&generic_driver,
 	.num_ports =		1,
-	.shutdown =		usb_serial_generic_shutdown,
+	.disconnect =		usb_serial_generic_disconnect,
+	.release =		usb_serial_generic_release,
 	.throttle =		usb_serial_generic_throttle,
 	.unthrottle =		usb_serial_generic_unthrottle,
 	.resume =		usb_serial_generic_resume,
@@ -551,7 +552,7 @@ int usb_serial_handle_break(struct usb_serial_port *port)
 }
 EXPORT_SYMBOL_GPL(usb_serial_handle_break);
 
-void usb_serial_generic_shutdown(struct usb_serial *serial)
+void usb_serial_generic_disconnect(struct usb_serial *serial)
 {
 	int i;
 
@@ -562,3 +563,7 @@ void usb_serial_generic_shutdown(struct usb_serial *serial)
 		generic_cleanup(serial->port[i]);
 }
 
+void usb_serial_generic_release(struct usb_serial *serial)
+{
+	dbg("%s", __func__);
+}
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index 53ef5996e33d..0191693625d6 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -224,7 +224,8 @@ static int  edge_tiocmget(struct tty_struct *tty, struct file *file);
 static int  edge_tiocmset(struct tty_struct *tty, struct file *file,
 					unsigned int set, unsigned int clear);
 static int  edge_startup(struct usb_serial *serial);
-static void edge_shutdown(struct usb_serial *serial);
+static void edge_disconnect(struct usb_serial *serial);
+static void edge_release(struct usb_serial *serial);
 
 #include "io_tables.h"	/* all of the devices that this driver supports */
 
@@ -3193,21 +3194,16 @@ static int edge_startup(struct usb_serial *serial)
 
 
 /****************************************************************************
- * edge_shutdown
+ * edge_disconnect
  *	This function is called whenever the device is removed from the usb bus.
  ****************************************************************************/
-static void edge_shutdown(struct usb_serial *serial)
+static void edge_disconnect(struct usb_serial *serial)
 {
 	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
-	int i;
 
 	dbg("%s", __func__);
 
 	/* stop reads and writes on all ports */
-	for (i = 0; i < serial->num_ports; ++i) {
-		kfree(usb_get_serial_port_data(serial->port[i]));
-		usb_set_serial_port_data(serial->port[i],  NULL);
-	}
 	/* free up our endpoint stuff */
 	if (edge_serial->is_epic) {
 		usb_kill_urb(edge_serial->interrupt_read_urb);
@@ -3218,9 +3214,24 @@ static void edge_shutdown(struct usb_serial *serial)
 		usb_free_urb(edge_serial->read_urb);
 		kfree(edge_serial->bulk_in_buffer);
 	}
+}
+
+
+/****************************************************************************
+ * edge_release
+ *	This function is called when the device structure is deallocated.
+ ****************************************************************************/
+static void edge_release(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+	int i;
+
+	dbg("%s", __func__);
+
+	for (i = 0; i < serial->num_ports; ++i)
+		kfree(usb_get_serial_port_data(serial->port[i]));
 
 	kfree(edge_serial);
-	usb_set_serial_data(serial, NULL);
 }
 
 
diff --git a/drivers/usb/serial/io_tables.h b/drivers/usb/serial/io_tables.h
index 7eb9d67b81b6..9241d3147513 100644
--- a/drivers/usb/serial/io_tables.h
+++ b/drivers/usb/serial/io_tables.h
@@ -117,7 +117,8 @@ static struct usb_serial_driver edgeport_2port_device = {
 	.throttle		= edge_throttle,
 	.unthrottle		= edge_unthrottle,
 	.attach			= edge_startup,
-	.shutdown		= edge_shutdown,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
 	.tiocmget		= edge_tiocmget,
@@ -145,7 +146,8 @@ static struct usb_serial_driver edgeport_4port_device = {
 	.throttle		= edge_throttle,
 	.unthrottle		= edge_unthrottle,
 	.attach			= edge_startup,
-	.shutdown		= edge_shutdown,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
 	.tiocmget		= edge_tiocmget,
@@ -173,7 +175,8 @@ static struct usb_serial_driver edgeport_8port_device = {
 	.throttle		= edge_throttle,
 	.unthrottle		= edge_unthrottle,
 	.attach			= edge_startup,
-	.shutdown		= edge_shutdown,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
 	.tiocmget		= edge_tiocmget,
@@ -200,7 +203,8 @@ static struct usb_serial_driver epic_device = {
 	.throttle		= edge_throttle,
 	.unthrottle		= edge_unthrottle,
 	.attach			= edge_startup,
-	.shutdown		= edge_shutdown,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
 	.tiocmget		= edge_tiocmget,
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index db964db42d3c..e8bc42f92e79 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -2663,7 +2663,7 @@ cleanup:
 	return -ENOMEM;
 }
 
-static void edge_shutdown(struct usb_serial *serial)
+static void edge_disconnect(struct usb_serial *serial)
 {
 	int i;
 	struct edgeport_port *edge_port;
@@ -2673,12 +2673,22 @@ static void edge_shutdown(struct usb_serial *serial)
 	for (i = 0; i < serial->num_ports; ++i) {
 		edge_port = usb_get_serial_port_data(serial->port[i]);
 		edge_remove_sysfs_attrs(edge_port->port);
+	}
+}
+
+static void edge_release(struct usb_serial *serial)
+{
+	int i;
+	struct edgeport_port *edge_port;
+
+	dbg("%s", __func__);
+
+	for (i = 0; i < serial->num_ports; ++i) {
+		edge_port = usb_get_serial_port_data(serial->port[i]);
 		edge_buf_free(edge_port->ep_out_buf);
 		kfree(edge_port);
-		usb_set_serial_port_data(serial->port[i], NULL);
 	}
 	kfree(usb_get_serial_data(serial));
-	usb_set_serial_data(serial, NULL);
 }
 
 
@@ -2915,7 +2925,8 @@ static struct usb_serial_driver edgeport_1port_device = {
 	.throttle		= edge_throttle,
 	.unthrottle		= edge_unthrottle,
 	.attach			= edge_startup,
-	.shutdown		= edge_shutdown,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
 	.port_probe		= edge_create_sysfs_attrs,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
@@ -2944,7 +2955,8 @@ static struct usb_serial_driver edgeport_2port_device = {
 	.throttle		= edge_throttle,
 	.unthrottle		= edge_unthrottle,
 	.attach			= edge_startup,
-	.shutdown		= edge_shutdown,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
 	.port_probe		= edge_create_sysfs_attrs,
 	.ioctl			= edge_ioctl,
 	.set_termios		= edge_set_termios,
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index c610a99fa477..2545d45ce16f 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -79,7 +79,6 @@ static int  ipaq_open(struct tty_struct *tty,
 static void ipaq_close(struct usb_serial_port *port);
 static int  ipaq_calc_num_ports(struct usb_serial *serial);
 static int  ipaq_startup(struct usb_serial *serial);
-static void ipaq_shutdown(struct usb_serial *serial);
 static int ipaq_write(struct tty_struct *tty, struct usb_serial_port *port,
 			const unsigned char *buf, int count);
 static int ipaq_write_bulk(struct usb_serial_port *port,
@@ -576,7 +575,6 @@ static struct usb_serial_driver ipaq_device = {
 	.close =		ipaq_close,
 	.attach =		ipaq_startup,
 	.calc_num_ports =	ipaq_calc_num_ports,
-	.shutdown =		ipaq_shutdown,
 	.write =		ipaq_write,
 	.write_room =		ipaq_write_room,
 	.chars_in_buffer =	ipaq_chars_in_buffer,
@@ -990,11 +988,6 @@ static int ipaq_startup(struct usb_serial *serial)
 	return usb_reset_configuration(serial->dev);
 }
 
-static void ipaq_shutdown(struct usb_serial *serial)
-{
-	dbg("%s", __func__);
-}
-
 static int __init ipaq_init(void)
 {
 	int retval;
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 76a3cc327bb9..96873a7a32b0 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -121,8 +121,8 @@ static int iuu_startup(struct usb_serial *serial)
 	return 0;
 }
 
-/* Shutdown function */
-static void iuu_shutdown(struct usb_serial *serial)
+/* Release function */
+static void iuu_release(struct usb_serial *serial)
 {
 	struct usb_serial_port *port = serial->port[0];
 	struct iuu_private *priv = usb_get_serial_port_data(port);
@@ -1202,7 +1202,7 @@ static struct usb_serial_driver iuu_device = {
 	.tiocmset = iuu_tiocmset,
 	.set_termios = iuu_set_termios,
 	.attach = iuu_startup,
-	.shutdown = iuu_shutdown,
+	.release = iuu_release,
 };
 
 static int __init iuu_init(void)
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index f1195a98f316..2594b8743d3f 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -2689,7 +2689,7 @@ static int keyspan_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void keyspan_shutdown(struct usb_serial *serial)
+static void keyspan_disconnect(struct usb_serial *serial)
 {
 	int				i, j;
 	struct usb_serial_port		*port;
@@ -2729,6 +2729,17 @@ static void keyspan_shutdown(struct usb_serial *serial)
 			usb_free_urb(p_priv->out_urbs[j]);
 		}
 	}
+}
+
+static void keyspan_release(struct usb_serial *serial)
+{
+	int				i;
+	struct usb_serial_port		*port;
+	struct keyspan_serial_private 	*s_priv;
+
+	dbg("%s", __func__);
+
+	s_priv = usb_get_serial_data(serial);
 
 	/*  dbg("Freeing serial->private."); */
 	kfree(s_priv);
diff --git a/drivers/usb/serial/keyspan.h b/drivers/usb/serial/keyspan.h
index 0d4569b60768..3107ed15af64 100644
--- a/drivers/usb/serial/keyspan.h
+++ b/drivers/usb/serial/keyspan.h
@@ -41,7 +41,8 @@ static int  keyspan_open		(struct tty_struct *tty,
 static void keyspan_close		(struct usb_serial_port *port);
 static void keyspan_dtr_rts		(struct usb_serial_port *port, int on);
 static int  keyspan_startup		(struct usb_serial *serial);
-static void keyspan_shutdown		(struct usb_serial *serial);
+static void keyspan_disconnect		(struct usb_serial *serial);
+static void keyspan_release		(struct usb_serial *serial);
 static int  keyspan_write_room		(struct tty_struct *tty);
 
 static int  keyspan_write		(struct tty_struct *tty,
@@ -569,7 +570,8 @@ static struct usb_serial_driver keyspan_1port_device = {
 	.tiocmget		= keyspan_tiocmget,
 	.tiocmset		= keyspan_tiocmset,
 	.attach			= keyspan_startup,
-	.shutdown		= keyspan_shutdown,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
 };
 
 static struct usb_serial_driver keyspan_2port_device = {
@@ -590,7 +592,8 @@ static struct usb_serial_driver keyspan_2port_device = {
 	.tiocmget		= keyspan_tiocmget,
 	.tiocmset		= keyspan_tiocmset,
 	.attach			= keyspan_startup,
-	.shutdown		= keyspan_shutdown,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
 };
 
 static struct usb_serial_driver keyspan_4port_device = {
@@ -611,7 +614,8 @@ static struct usb_serial_driver keyspan_4port_device = {
 	.tiocmget		= keyspan_tiocmget,
 	.tiocmset		= keyspan_tiocmset,
 	.attach			= keyspan_startup,
-	.shutdown		= keyspan_shutdown,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
 };
 
 #endif
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index ab769dbea1b3..d0b12e40c2b1 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -809,7 +809,7 @@ static int keyspan_pda_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void keyspan_pda_shutdown(struct usb_serial *serial)
+static void keyspan_pda_release(struct usb_serial *serial)
 {
 	dbg("%s", __func__);
 
@@ -869,7 +869,7 @@ static struct usb_serial_driver keyspan_pda_device = {
 	.tiocmget =		keyspan_pda_tiocmget,
 	.tiocmset =		keyspan_pda_tiocmset,
 	.attach =		keyspan_pda_startup,
-	.shutdown =		keyspan_pda_shutdown,
+	.release =		keyspan_pda_release,
 };
 
 
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index fa817c66b3e8..0f44bb8e8d4f 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -73,7 +73,8 @@ static int debug;
  * Function prototypes
  */
 static int  klsi_105_startup(struct usb_serial *serial);
-static void klsi_105_shutdown(struct usb_serial *serial);
+static void klsi_105_disconnect(struct usb_serial *serial);
+static void klsi_105_release(struct usb_serial *serial);
 static int  klsi_105_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp);
 static void klsi_105_close(struct usb_serial_port *port);
@@ -131,7 +132,8 @@ static struct usb_serial_driver kl5kusb105d_device = {
 	.tiocmget =          klsi_105_tiocmget,
 	.tiocmset =          klsi_105_tiocmset,
 	.attach =	     klsi_105_startup,
-	.shutdown =	     klsi_105_shutdown,
+	.disconnect =	     klsi_105_disconnect,
+	.release =	     klsi_105_release,
 	.throttle =	     klsi_105_throttle,
 	.unthrottle =	     klsi_105_unthrottle,
 };
@@ -315,7 +317,7 @@ err_cleanup:
 } /* klsi_105_startup */
 
 
-static void klsi_105_shutdown(struct usb_serial *serial)
+static void klsi_105_disconnect(struct usb_serial *serial)
 {
 	int i;
 
@@ -325,33 +327,36 @@ static void klsi_105_shutdown(struct usb_serial *serial)
 	for (i = 0; i < serial->num_ports; ++i) {
 		struct klsi_105_private *priv =
 				usb_get_serial_port_data(serial->port[i]);
-		unsigned long flags;
 
 		if (priv) {
 			/* kill our write urb pool */
 			int j;
 			struct urb **write_urbs = priv->write_urb_pool;
-			spin_lock_irqsave(&priv->lock, flags);
 
 			for (j = 0; j < NUM_URBS; j++) {
 				if (write_urbs[j]) {
-					/* FIXME - uncomment the following
-					 * usb_kill_urb call when the host
-					 * controllers get fixed to set
-					 * urb->dev = NULL after the urb is
-					 * finished.  Otherwise this call
-					 * oopses. */
-					/* usb_kill_urb(write_urbs[j]); */
-					kfree(write_urbs[j]->transfer_buffer);
+					usb_kill_urb(write_urbs[j]);
 					usb_free_urb(write_urbs[j]);
 				}
 			}
-			spin_unlock_irqrestore(&priv->lock, flags);
-			kfree(priv);
-			usb_set_serial_port_data(serial->port[i], NULL);
 		}
 	}
-} /* klsi_105_shutdown */
+} /* klsi_105_disconnect */
+
+
+static void klsi_105_release(struct usb_serial *serial)
+{
+	int i;
+
+	dbg("%s", __func__);
+
+	for (i = 0; i < serial->num_ports; ++i) {
+		struct klsi_105_private *priv =
+				usb_get_serial_port_data(serial->port[i]);
+
+		kfree(priv);
+	}
+} /* klsi_105_release */
 
 static int  klsi_105_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp)
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index 6b570498287f..6db0e561f680 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -69,7 +69,7 @@ static int debug;
 
 /* Function prototypes */
 static int  kobil_startup(struct usb_serial *serial);
-static void kobil_shutdown(struct usb_serial *serial);
+static void kobil_release(struct usb_serial *serial);
 static int  kobil_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp);
 static void kobil_close(struct usb_serial_port *port);
@@ -117,7 +117,7 @@ static struct usb_serial_driver kobil_device = {
 	.id_table =		id_table,
 	.num_ports =		1,
 	.attach =		kobil_startup,
-	.shutdown =		kobil_shutdown,
+	.release =		kobil_release,
 	.ioctl =		kobil_ioctl,
 	.set_termios =		kobil_set_termios,
 	.tiocmget =		kobil_tiocmget,
@@ -201,17 +201,13 @@ static int kobil_startup(struct usb_serial *serial)
 }
 
 
-static void kobil_shutdown(struct usb_serial *serial)
+static void kobil_release(struct usb_serial *serial)
 {
 	int i;
 	dbg("%s - port %d", __func__, serial->port[0]->number);
 
-	for (i = 0; i < serial->num_ports; ++i) {
-		while (serial->port[i]->port.count > 0)
-			kobil_close(serial->port[i]);
+	for (i = 0; i < serial->num_ports; ++i)
 		kfree(usb_get_serial_port_data(serial->port[i]));
-		usb_set_serial_port_data(serial->port[i], NULL);
-	}
 }
 
 
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 873795548fc0..d8825e159aa5 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -92,7 +92,7 @@ static int debug;
  * Function prototypes
  */
 static int  mct_u232_startup(struct usb_serial *serial);
-static void mct_u232_shutdown(struct usb_serial *serial);
+static void mct_u232_release(struct usb_serial *serial);
 static int  mct_u232_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp);
 static void mct_u232_close(struct usb_serial_port *port);
@@ -149,7 +149,7 @@ static struct usb_serial_driver mct_u232_device = {
 	.tiocmget =	     mct_u232_tiocmget,
 	.tiocmset =	     mct_u232_tiocmset,
 	.attach =	     mct_u232_startup,
-	.shutdown =	     mct_u232_shutdown,
+	.release =	     mct_u232_release,
 };
 
 
@@ -407,7 +407,7 @@ static int mct_u232_startup(struct usb_serial *serial)
 } /* mct_u232_startup */
 
 
-static void mct_u232_shutdown(struct usb_serial *serial)
+static void mct_u232_release(struct usb_serial *serial)
 {
 	struct mct_u232_private *priv;
 	int i;
@@ -417,12 +417,9 @@ static void mct_u232_shutdown(struct usb_serial *serial)
 	for (i = 0; i < serial->num_ports; ++i) {
 		/* My special items, the standard routines free my urbs */
 		priv = usb_get_serial_port_data(serial->port[i]);
-		if (priv) {
-			usb_set_serial_port_data(serial->port[i], NULL);
-			kfree(priv);
-		}
+		kfree(priv);
 	}
-} /* mct_u232_shutdown */
+} /* mct_u232_release */
 
 static int  mct_u232_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp)
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 9e1a013ee7f6..bfc5ce000ef9 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -1521,19 +1521,16 @@ static int mos7720_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void mos7720_shutdown(struct usb_serial *serial)
+static void mos7720_release(struct usb_serial *serial)
 {
 	int i;
 
 	/* free private structure allocated for serial port */
-	for (i = 0; i < serial->num_ports; ++i) {
+	for (i = 0; i < serial->num_ports; ++i)
 		kfree(usb_get_serial_port_data(serial->port[i]));
-		usb_set_serial_port_data(serial->port[i], NULL);
-	}
 
 	/* free private structure allocated for serial device */
 	kfree(usb_get_serial_data(serial));
-	usb_set_serial_data(serial, NULL);
 }
 
 static struct usb_driver usb_driver = {
@@ -1558,7 +1555,7 @@ static struct usb_serial_driver moschip7720_2port_driver = {
 	.throttle		= mos7720_throttle,
 	.unthrottle		= mos7720_unthrottle,
 	.attach			= mos7720_startup,
-	.shutdown		= mos7720_shutdown,
+	.release		= mos7720_release,
 	.ioctl			= mos7720_ioctl,
 	.set_termios		= mos7720_set_termios,
 	.write			= mos7720_write,
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 5fe9fe3df772..c40f95c1951c 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -2633,16 +2633,16 @@ error:
 }
 
 /****************************************************************************
- * mos7840_shutdown
+ * mos7840_disconnect
  *	This function is called whenever the device is removed from the usb bus.
  ****************************************************************************/
 
-static void mos7840_shutdown(struct usb_serial *serial)
+static void mos7840_disconnect(struct usb_serial *serial)
 {
 	int i;
 	unsigned long flags;
 	struct moschip_port *mos7840_port;
-	dbg("%s", " shutdown :entering..........");
+	dbg("%s", " disconnect :entering..........");
 
 	if (!serial) {
 		dbg("%s", "Invalid Handler");
@@ -2662,11 +2662,42 @@ static void mos7840_shutdown(struct usb_serial *serial)
 			mos7840_port->zombie = 1;
 			spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
 			usb_kill_urb(mos7840_port->control_urb);
+		}
+	}
+
+	dbg("%s", "Thank u :: ");
+
+}
+
+/****************************************************************************
+ * mos7840_release
+ *	This function is called when the usb_serial structure is freed.
+ ****************************************************************************/
+
+static void mos7840_release(struct usb_serial *serial)
+{
+	int i;
+	struct moschip_port *mos7840_port;
+	dbg("%s", " release :entering..........");
+
+	if (!serial) {
+		dbg("%s", "Invalid Handler");
+		return;
+	}
+
+	/* check for the ports to be closed,close the ports and disconnect */
+
+	/* free private structure allocated for serial port  *
+	 * stop reads and writes on all ports                */
+
+	for (i = 0; i < serial->num_ports; ++i) {
+		mos7840_port = mos7840_get_port_private(serial->port[i]);
+		dbg("mos7840_port %d = %p", i, mos7840_port);
+		if (mos7840_port) {
 			kfree(mos7840_port->ctrl_buf);
 			kfree(mos7840_port->dr);
 			kfree(mos7840_port);
 		}
-		mos7840_set_port_private(serial->port[i], NULL);
 	}
 
 	dbg("%s", "Thank u :: ");
@@ -2707,7 +2738,8 @@ static struct usb_serial_driver moschip7840_4port_device = {
 	.tiocmget = mos7840_tiocmget,
 	.tiocmset = mos7840_tiocmset,
 	.attach = mos7840_startup,
-	.shutdown = mos7840_shutdown,
+	.disconnect = mos7840_disconnect,
+	.release = mos7840_release,
 	.read_bulk_callback = mos7840_bulk_in_callback,
 	.read_int_callback = mos7840_interrupt_callback,
 };
diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c
index 1104617334f5..56857ddbd70b 100644
--- a/drivers/usb/serial/omninet.c
+++ b/drivers/usb/serial/omninet.c
@@ -72,7 +72,8 @@ static void omninet_write_bulk_callback(struct urb *urb);
 static int  omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
 				const unsigned char *buf, int count);
 static int  omninet_write_room(struct tty_struct *tty);
-static void omninet_shutdown(struct usb_serial *serial);
+static void omninet_disconnect(struct usb_serial *serial);
+static void omninet_release(struct usb_serial *serial);
 static int omninet_attach(struct usb_serial *serial);
 
 static struct usb_device_id id_table[] = {
@@ -108,7 +109,8 @@ static struct usb_serial_driver zyxel_omninet_device = {
 	.write_room =		omninet_write_room,
 	.read_bulk_callback =	omninet_read_bulk_callback,
 	.write_bulk_callback =	omninet_write_bulk_callback,
-	.shutdown =		omninet_shutdown,
+	.disconnect =		omninet_disconnect,
+	.release =		omninet_release,
 };
 
 
@@ -345,13 +347,22 @@ static void omninet_write_bulk_callback(struct urb *urb)
 }
 
 
-static void omninet_shutdown(struct usb_serial *serial)
+static void omninet_disconnect(struct usb_serial *serial)
 {
 	struct usb_serial_port *wport = serial->port[1];
-	struct usb_serial_port *port = serial->port[0];
+
 	dbg("%s", __func__);
 
 	usb_kill_urb(wport->write_urb);
+}
+
+
+static void omninet_release(struct usb_serial *serial)
+{
+	struct usb_serial_port *port = serial->port[0];
+
+	dbg("%s", __func__);
+
 	kfree(usb_get_serial_port_data(port));
 }
 
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index c20480aa9755..336bba79ad32 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -463,7 +463,7 @@ error:
 	return retval;
 }
 
-static void opticon_shutdown(struct usb_serial *serial)
+static void opticon_disconnect(struct usb_serial *serial)
 {
 	struct opticon_private *priv = usb_get_serial_data(serial);
 
@@ -471,9 +471,16 @@ static void opticon_shutdown(struct usb_serial *serial)
 
 	usb_kill_urb(priv->bulk_read_urb);
 	usb_free_urb(priv->bulk_read_urb);
+}
+
+static void opticon_release(struct usb_serial *serial)
+{
+	struct opticon_private *priv = usb_get_serial_data(serial);
+
+	dbg("%s", __func__);
+
 	kfree(priv->bulk_in_buffer);
 	kfree(priv);
-	usb_set_serial_data(serial, NULL);
 }
 
 static int opticon_suspend(struct usb_interface *intf, pm_message_t message)
@@ -524,7 +531,8 @@ static struct usb_serial_driver opticon_device = {
 	.close =		opticon_close,
 	.write =		opticon_write,
 	.write_room = 		opticon_write_room,
-	.shutdown =		opticon_shutdown,
+	.disconnect =		opticon_disconnect,
+	.release =		opticon_release,
 	.throttle = 		opticon_throttle,
 	.unthrottle =		opticon_unthrottle,
 	.ioctl =		opticon_ioctl,
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index a38971cc3731..575816e6ba37 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -51,7 +51,8 @@ static void option_close(struct usb_serial_port *port);
 static void option_dtr_rts(struct usb_serial_port *port, int on);
 
 static int  option_startup(struct usb_serial *serial);
-static void option_shutdown(struct usb_serial *serial);
+static void option_disconnect(struct usb_serial *serial);
+static void option_release(struct usb_serial *serial);
 static int  option_write_room(struct tty_struct *tty);
 
 static void option_instat_callback(struct urb *urb);
@@ -568,7 +569,8 @@ static struct usb_serial_driver option_1port_device = {
 	.tiocmget          = option_tiocmget,
 	.tiocmset          = option_tiocmset,
 	.attach            = option_startup,
-	.shutdown          = option_shutdown,
+	.disconnect        = option_disconnect,
+	.release           = option_release,
 	.read_int_callback = option_instat_callback,
 	.suspend           = option_suspend,
 	.resume            = option_resume,
@@ -1149,7 +1151,14 @@ static void stop_read_write_urbs(struct usb_serial *serial)
 	}
 }
 
-static void option_shutdown(struct usb_serial *serial)
+static void option_disconnect(struct usb_serial *serial)
+{
+	dbg("%s", __func__);
+
+	stop_read_write_urbs(serial);
+}
+
+static void option_release(struct usb_serial *serial)
 {
 	int i, j;
 	struct usb_serial_port *port;
@@ -1157,8 +1166,6 @@ static void option_shutdown(struct usb_serial *serial)
 
 	dbg("%s", __func__);
 
-	stop_read_write_urbs(serial);
-
 	/* Now free them */
 	for (i = 0; i < serial->num_ports; ++i) {
 		port = serial->port[i];
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index 7de54781fe61..3cece27325e7 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -159,7 +159,7 @@ static int oti6858_tiocmget(struct tty_struct *tty, struct file *file);
 static int oti6858_tiocmset(struct tty_struct *tty, struct file *file,
 				unsigned int set, unsigned int clear);
 static int oti6858_startup(struct usb_serial *serial);
-static void oti6858_shutdown(struct usb_serial *serial);
+static void oti6858_release(struct usb_serial *serial);
 
 /* functions operating on buffers */
 static struct oti6858_buf *oti6858_buf_alloc(unsigned int size);
@@ -194,7 +194,7 @@ static struct usb_serial_driver oti6858_device = {
 	.write_room =		oti6858_write_room,
 	.chars_in_buffer =	oti6858_chars_in_buffer,
 	.attach =		oti6858_startup,
-	.shutdown =		oti6858_shutdown,
+	.release =		oti6858_release,
 };
 
 struct oti6858_private {
@@ -782,7 +782,7 @@ static int oti6858_ioctl(struct tty_struct *tty, struct file *file,
 }
 
 
-static void oti6858_shutdown(struct usb_serial *serial)
+static void oti6858_release(struct usb_serial *serial)
 {
 	struct oti6858_private *priv;
 	int i;
@@ -794,7 +794,6 @@ static void oti6858_shutdown(struct usb_serial *serial)
 		if (priv) {
 			oti6858_buf_free(priv->buf);
 			kfree(priv);
-			usb_set_serial_port_data(serial->port[i], NULL);
 		}
 	}
 }
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 6357b57f628c..ec6c132a25b5 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -878,7 +878,7 @@ static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
 		dbg("%s - error sending break = %d", __func__, result);
 }
 
-static void pl2303_shutdown(struct usb_serial *serial)
+static void pl2303_release(struct usb_serial *serial)
 {
 	int i;
 	struct pl2303_private *priv;
@@ -890,7 +890,6 @@ static void pl2303_shutdown(struct usb_serial *serial)
 		if (priv) {
 			pl2303_buf_free(priv->buf);
 			kfree(priv);
-			usb_set_serial_port_data(serial->port[i], NULL);
 		}
 	}
 }
@@ -1123,7 +1122,7 @@ static struct usb_serial_driver pl2303_device = {
 	.write_room =		pl2303_write_room,
 	.chars_in_buffer =	pl2303_chars_in_buffer,
 	.attach =		pl2303_startup,
-	.shutdown =		pl2303_shutdown,
+	.release =		pl2303_release,
 };
 
 static int __init pl2303_init(void)
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index a88cde950161..032f7aeb40a4 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -814,7 +814,7 @@ static int sierra_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void sierra_shutdown(struct usb_serial *serial)
+static void sierra_disconnect(struct usb_serial *serial)
 {
 	int i;
 	struct usb_serial_port *port;
@@ -853,7 +853,7 @@ static struct usb_serial_driver sierra_device = {
 	.tiocmget          = sierra_tiocmget,
 	.tiocmset          = sierra_tiocmset,
 	.attach            = sierra_startup,
-	.shutdown          = sierra_shutdown,
+	.disconnect        = sierra_disconnect,
 	.read_int_callback = sierra_instat_callback,
 };
 
diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c
index 8f7ed8f13996..3c249d8e8b8e 100644
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -356,7 +356,7 @@ cleanup:
 }
 
 /* call when the device plug out. free all the memory alloced by probe */
-static void spcp8x5_shutdown(struct usb_serial *serial)
+static void spcp8x5_release(struct usb_serial *serial)
 {
 	int i;
 	struct spcp8x5_private *priv;
@@ -366,7 +366,6 @@ static void spcp8x5_shutdown(struct usb_serial *serial)
 		if (priv) {
 			free_ringbuf(priv->buf);
 			kfree(priv);
-			usb_set_serial_port_data(serial->port[i] , NULL);
 		}
 	}
 }
@@ -1020,7 +1019,7 @@ static struct usb_serial_driver spcp8x5_device = {
 	.write_bulk_callback	= spcp8x5_write_bulk_callback,
 	.chars_in_buffer 	= spcp8x5_chars_in_buffer,
 	.attach 		= spcp8x5_startup,
-	.shutdown 		= spcp8x5_shutdown,
+	.release 		= spcp8x5_release,
 };
 
 static int __init spcp8x5_init(void)
diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c
index 8b07ebc6baeb..6157fac9366b 100644
--- a/drivers/usb/serial/symbolserial.c
+++ b/drivers/usb/serial/symbolserial.c
@@ -267,7 +267,7 @@ error:
 	return retval;
 }
 
-static void symbol_shutdown(struct usb_serial *serial)
+static void symbol_disconnect(struct usb_serial *serial)
 {
 	struct symbol_private *priv = usb_get_serial_data(serial);
 
@@ -275,9 +275,16 @@ static void symbol_shutdown(struct usb_serial *serial)
 
 	usb_kill_urb(priv->int_urb);
 	usb_free_urb(priv->int_urb);
+}
+
+static void symbol_release(struct usb_serial *serial)
+{
+	struct symbol_private *priv = usb_get_serial_data(serial);
+
+	dbg("%s", __func__);
+
 	kfree(priv->int_buffer);
 	kfree(priv);
-	usb_set_serial_data(serial, NULL);
 }
 
 static struct usb_driver symbol_driver = {
@@ -299,7 +306,8 @@ static struct usb_serial_driver symbol_device = {
 	.attach =		symbol_startup,
 	.open =			symbol_open,
 	.close =		symbol_close,
-	.shutdown =		symbol_shutdown,
+	.disconnect =		symbol_disconnect,
+	.release =		symbol_release,
 	.throttle = 		symbol_throttle,
 	.unthrottle =		symbol_unthrottle,
 };
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 42cb04c403be..991d8232e376 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -97,7 +97,7 @@ struct ti_device {
 /* Function Declarations */
 
 static int ti_startup(struct usb_serial *serial);
-static void ti_shutdown(struct usb_serial *serial);
+static void ti_release(struct usb_serial *serial);
 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port,
 		struct file *file);
 static void ti_close(struct usb_serial_port *port);
@@ -230,7 +230,7 @@ static struct usb_serial_driver ti_1port_device = {
 	.id_table		= ti_id_table_3410,
 	.num_ports		= 1,
 	.attach			= ti_startup,
-	.shutdown		= ti_shutdown,
+	.release		= ti_release,
 	.open			= ti_open,
 	.close			= ti_close,
 	.write			= ti_write,
@@ -258,7 +258,7 @@ static struct usb_serial_driver ti_2port_device = {
 	.id_table		= ti_id_table_5052,
 	.num_ports		= 2,
 	.attach			= ti_startup,
-	.shutdown		= ti_shutdown,
+	.release		= ti_release,
 	.open			= ti_open,
 	.close			= ti_close,
 	.write			= ti_write,
@@ -473,7 +473,7 @@ free_tdev:
 }
 
 
-static void ti_shutdown(struct usb_serial *serial)
+static void ti_release(struct usb_serial *serial)
 {
 	int i;
 	struct ti_device *tdev = usb_get_serial_data(serial);
@@ -486,12 +486,10 @@ static void ti_shutdown(struct usb_serial *serial)
 		if (tport) {
 			ti_buf_free(tport->tp_write_buf);
 			kfree(tport);
-			usb_set_serial_port_data(serial->port[i], NULL);
 		}
 	}
 
 	kfree(tdev);
-	usb_set_serial_data(serial, NULL);
 }
 
 
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index da890f030fac..d595aa5586a7 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -141,6 +141,14 @@ static void destroy_serial(struct kref *kref)
 	if (serial->minor != SERIAL_TTY_NO_MINOR)
 		return_serial(serial);
 
+	serial->type->release(serial);
+
+	for (i = 0; i < serial->num_ports; ++i) {
+		port = serial->port[i];
+		if (port)
+			put_device(&port->dev);
+	}
+
 	/* If this is a "fake" port, we have to clean it up here, as it will
 	 * not get cleaned up in port_release() as it was never registered with
 	 * the driver core */
@@ -148,9 +156,8 @@ static void destroy_serial(struct kref *kref)
 		for (i = serial->num_ports;
 					i < serial->num_port_pointers; ++i) {
 			port = serial->port[i];
-			if (!port)
-				continue;
-			port_free(port);
+			if (port)
+				port_free(port);
 		}
 	}
 
@@ -1118,10 +1125,6 @@ void usb_serial_disconnect(struct usb_interface *interface)
 	serial->disconnected = 1;
 	mutex_unlock(&serial->disc_mutex);
 
-	/* Unfortunately, many of the sub-drivers expect the port structures
-	 * to exist when their shutdown method is called, so we have to go
-	 * through this awkward two-step unregistration procedure.
-	 */
 	for (i = 0; i < serial->num_ports; ++i) {
 		port = serial->port[i];
 		if (port) {
@@ -1153,14 +1156,7 @@ void usb_serial_disconnect(struct usb_interface *interface)
 			}
 		}
 	}
-	serial->type->shutdown(serial);
-	for (i = 0; i < serial->num_ports; ++i) {
-		port = serial->port[i];
-		if (port) {
-			put_device(&port->dev);
-			serial->port[i] = NULL;
-		}
-	}
+	serial->type->disconnect(serial);
 
 	/* let the last holder of this object
 	 * cause it to be cleaned up */
@@ -1338,7 +1334,8 @@ static void fixup_generic(struct usb_serial_driver *device)
 	set_to_generic_if_null(device, chars_in_buffer);
 	set_to_generic_if_null(device, read_bulk_callback);
 	set_to_generic_if_null(device, write_bulk_callback);
-	set_to_generic_if_null(device, shutdown);
+	set_to_generic_if_null(device, disconnect);
+	set_to_generic_if_null(device, release);
 }
 
 int usb_serial_register(struct usb_serial_driver *driver)
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index b15f1c0e1d4a..f5d0f64dcc52 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -47,7 +47,7 @@ static void visor_unthrottle(struct tty_struct *tty);
 static int  visor_probe(struct usb_serial *serial,
 					const struct usb_device_id *id);
 static int  visor_calc_num_ports(struct usb_serial *serial);
-static void visor_shutdown(struct usb_serial *serial);
+static void visor_release(struct usb_serial *serial);
 static void visor_write_bulk_callback(struct urb *urb);
 static void visor_read_bulk_callback(struct urb *urb);
 static void visor_read_int_callback(struct urb *urb);
@@ -202,7 +202,7 @@ static struct usb_serial_driver handspring_device = {
 	.attach =		treo_attach,
 	.probe =		visor_probe,
 	.calc_num_ports =	visor_calc_num_ports,
-	.shutdown =		visor_shutdown,
+	.release =		visor_release,
 	.write =		visor_write,
 	.write_room =		visor_write_room,
 	.write_bulk_callback =	visor_write_bulk_callback,
@@ -227,7 +227,7 @@ static struct usb_serial_driver clie_5_device = {
 	.attach =		clie_5_attach,
 	.probe =		visor_probe,
 	.calc_num_ports =	visor_calc_num_ports,
-	.shutdown =		visor_shutdown,
+	.release =		visor_release,
 	.write =		visor_write,
 	.write_room =		visor_write_room,
 	.write_bulk_callback =	visor_write_bulk_callback,
@@ -918,7 +918,7 @@ static int clie_5_attach(struct usb_serial *serial)
 	return generic_startup(serial);
 }
 
-static void visor_shutdown(struct usb_serial *serial)
+static void visor_release(struct usb_serial *serial)
 {
 	struct visor_private *priv;
 	int i;
@@ -927,10 +927,7 @@ static void visor_shutdown(struct usb_serial *serial)
 
 	for (i = 0; i < serial->num_ports; i++) {
 		priv = usb_get_serial_port_data(serial->port[i]);
-		if (priv) {
-			usb_set_serial_port_data(serial->port[i], NULL);
-			kfree(priv);
-		}
+		kfree(priv);
 	}
 }
 
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 7c7295d09f34..8d126dd7a02e 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -144,7 +144,7 @@ static int  whiteheat_firmware_attach(struct usb_serial *serial);
 
 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
 static int  whiteheat_attach(struct usb_serial *serial);
-static void whiteheat_shutdown(struct usb_serial *serial);
+static void whiteheat_release(struct usb_serial *serial);
 static int  whiteheat_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp);
 static void whiteheat_close(struct usb_serial_port *port);
@@ -189,7 +189,7 @@ static struct usb_serial_driver whiteheat_device = {
 	.id_table =		id_table_std,
 	.num_ports =		4,
 	.attach =		whiteheat_attach,
-	.shutdown =		whiteheat_shutdown,
+	.release =		whiteheat_release,
 	.open =			whiteheat_open,
 	.close =		whiteheat_close,
 	.write =		whiteheat_write,
@@ -617,7 +617,7 @@ no_command_buffer:
 }
 
 
-static void whiteheat_shutdown(struct usb_serial *serial)
+static void whiteheat_release(struct usb_serial *serial)
 {
 	struct usb_serial_port *command_port;
 	struct usb_serial_port *port;
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index ed4aa0fa7ed8..44801d26a37a 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -194,8 +194,10 @@ static inline void usb_set_serial_data(struct usb_serial *serial, void *data)
  *	This will be called when the struct usb_serial structure is fully set
  *	set up.  Do any local initialization of the device, or any private
  *	memory structure allocation at this point in time.
- * @shutdown: pointer to the driver's shutdown function.  This will be
- *	called when the device is removed from the system.
+ * @disconnect: pointer to the driver's disconnect function.  This will be
+ *	called when the device is unplugged or unbound from the driver.
+ * @release: pointer to the driver's release function.  This will be called
+ *	when the usb_serial data structure is about to be destroyed.
  * @usb_driver: pointer to the struct usb_driver that controls this
  *	device.  This is necessary to allow dynamic ids to be added to
  *	the driver from sysfs.
@@ -226,7 +228,8 @@ struct usb_serial_driver {
 	int (*attach)(struct usb_serial *serial);
 	int (*calc_num_ports) (struct usb_serial *serial);
 
-	void (*shutdown)(struct usb_serial *serial);
+	void (*disconnect)(struct usb_serial *serial);
+	void (*release)(struct usb_serial *serial);
 
 	int (*port_probe)(struct usb_serial_port *port);
 	int (*port_remove)(struct usb_serial_port *port);
@@ -308,7 +311,8 @@ extern void usb_serial_generic_read_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_write_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_throttle(struct tty_struct *tty);
 extern void usb_serial_generic_unthrottle(struct tty_struct *tty);
-extern void usb_serial_generic_shutdown(struct usb_serial *serial);
+extern void usb_serial_generic_disconnect(struct usb_serial *serial);
+extern void usb_serial_generic_release(struct usb_serial *serial);
 extern int usb_serial_generic_register(int debug);
 extern void usb_serial_generic_deregister(void);
 extern void usb_serial_generic_resubmit_read_urb(struct usb_serial_port *port,