diff --git a/drivers/staging/serqt_usb2/serqt_usb2.c b/drivers/staging/serqt_usb2/serqt_usb2.c
index 8a6e5ea476e1..4f891dba2faa 100644
--- a/drivers/staging/serqt_usb2/serqt_usb2.c
+++ b/drivers/staging/serqt_usb2/serqt_usb2.c
@@ -873,7 +873,7 @@ static int qt_open(struct tty_struct *tty,
 	result = qt_get_device(serial, &port0->DeviceData);
 
 	/* Port specific setups */
-	result = qt_open_channel(serial, port->number, &ChannelData);
+	result = qt_open_channel(serial, port->port_number, &ChannelData);
 	if (result < 0) {
 		dev_dbg(&port->dev, "qt_open_channel failed\n");
 		return result;
@@ -888,7 +888,7 @@ static int qt_open(struct tty_struct *tty,
 	    (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);
 
 	/* Set Baud rate to default and turn off (default)flow control here */
-	result = qt_setuart(serial, port->number, DEFAULT_DIVISOR, DEFAULT_LCR);
+	result = qt_setuart(serial, port->port_number, DEFAULT_DIVISOR, DEFAULT_LCR);
 	if (result < 0) {
 		dev_dbg(&port->dev, "qt_setuart failed\n");
 		return result;
@@ -906,7 +906,6 @@ static int qt_open(struct tty_struct *tty,
 			qt_submit_urb_from_open(serial, port);
 	}
 
-	dev_dbg(&port->dev, "port number is %d\n", port->number);
 	dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
 	dev_dbg(&port->dev,
 		"Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
@@ -1022,14 +1021,11 @@ static void qt_close(struct usb_serial_port *port)
 	/* Close uart channel */
 	status = qt_close_channel(serial, index);
 	if (status < 0)
-		dev_dbg(&port->dev,
-			"%s - port %d qt_close_channel failed.\n",
-			__func__, port->number);
+		dev_dbg(&port->dev, "%s - qt_close_channel failed.\n", __func__);
 
 	port0->open_ports--;
 
-	dev_dbg(&port->dev, "qt_num_open_ports in close%d:in port%d\n",
-		port0->open_ports, port->number);
+	dev_dbg(&port->dev, "qt_num_open_ports in close%d\n", port0->open_ports);
 
 	if (port0->open_ports == 0) {
 		if (serial->port[0]->interrupt_in_urb) {
@@ -1169,8 +1165,7 @@ static int qt_ioctl(struct tty_struct *tty,
 		return 0;
 	}
 
-	dev_dbg(&port->dev, "%s -No ioctl for that one.  port = %d\n",
-		__func__, port->number);
+	dev_dbg(&port->dev, "%s -No ioctl for that one.\n", __func__);
 	return -ENOIOCTLCMD;
 }
 
@@ -1245,8 +1240,7 @@ static void qt_set_termios(struct tty_struct *tty,
 
 	/* Now determine flow control */
 	if (cflag & CRTSCTS) {
-		dev_dbg(&port->dev, "%s - Enabling HW flow control port %d\n",
-			__func__, port->number);
+		dev_dbg(&port->dev, "%s - Enabling HW flow control\n", __func__);
 
 		/* Enable RTS/CTS flow control */
 		status = BoxSetHW_FlowCtrl(port->serial, index, 1);
@@ -1258,8 +1252,7 @@ static void qt_set_termios(struct tty_struct *tty,
 	} else {
 		/* Disable RTS/CTS flow control */
 		dev_dbg(&port->dev,
-			"%s - disabling HW flow control port %d\n",
-			__func__, port->number);
+			"%s - disabling HW flow control\n", __func__);
 
 		status = BoxSetHW_FlowCtrl(port->serial, index, 0);
 		if (status < 0) {
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index 40e7fd94646f..293a7706ba3f 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -414,7 +414,7 @@ static int ark3116_ioctl(struct tty_struct *tty,
 		memset(&serstruct, 0, sizeof(serstruct));
 		serstruct.type = PORT_16654;
 		serstruct.line = port->serial->minor;
-		serstruct.port = port->number;
+		serstruct.port = port->port_number;
 		serstruct.custom_divisor = 0;
 		serstruct.baud_base = 460800;
 
diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c
index 3c4db6d196c6..f053b302a00d 100644
--- a/drivers/usb/serial/bus.c
+++ b/drivers/usb/serial/bus.c
@@ -43,7 +43,7 @@ static ssize_t show_port_number(struct device *dev,
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
 
-	return sprintf(buf, "%d\n", port->number - port->serial->minor);
+	return sprintf(buf, "%d\n", port->port_number);
 }
 
 static DEVICE_ATTR(port_number, S_IRUGO, show_port_number, NULL);
@@ -80,7 +80,7 @@ static int usb_serial_device_probe(struct device *dev)
 		goto exit_with_autopm;
 	}
 
-	minor = port->number;
+	minor = port->minor;
 	tty_register_device(usb_serial_tty_driver, minor, dev);
 	dev_info(&port->serial->dev->dev,
 		 "%s converter now attached to ttyUSB%d\n",
@@ -106,7 +106,7 @@ static int usb_serial_device_remove(struct device *dev)
 	/* make sure suspend/resume doesn't race against port_remove */
 	usb_autopm_get_interface(port->serial->interface);
 
-	minor = port->number;
+	minor = port->minor;
 	tty_unregister_device(usb_serial_tty_driver, minor);
 
 	device_remove_file(&port->dev, &dev_attr_port_number);
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index 5f3bcd31e204..1b811022f1a1 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -210,7 +210,7 @@ static void usb_console_write(struct console *co,
 	if (count == 0)
 		return;
 
-	pr_debug("%s - port %d, %d byte(s)\n", __func__, port->number, count);
+	pr_debug("%s - minor %d, %d byte(s)\n", __func__, port->minor, count);
 
 	if (!port->port.console) {
 		pr_debug("%s - port not opened\n", __func__);
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 2c659553c07c..d6ef2f8da37d 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -666,8 +666,6 @@ static void cp210x_set_termios(struct tty_struct *tty,
 	unsigned int bits;
 	unsigned int modem_ctl[4];
 
-	dev_dbg(dev, "%s - port %d\n", __func__, port->number);
-
 	if (!tty)
 		return;
 
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 082120198f87..e948dc02795d 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -435,7 +435,7 @@ static void cypress_set_dead(struct usb_serial_port *port)
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	dev_err(&port->dev, "cypress_m8 suspending failing port %d - "
-		"interval might be too short\n", port->number);
+		"interval might be too short\n", port->port_number);
 }
 
 
@@ -667,7 +667,7 @@ static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
 {
 	struct cypress_private *priv = usb_get_serial_port_data(port);
 
-	dev_dbg(&port->dev, "%s - port %d, %d bytes\n", __func__, port->number, count);
+	dev_dbg(&port->dev, "%s - %d bytes\n", __func__, count);
 
 	/* line control commands, which need to be executed immediately,
 	   are not put into the buffer for obvious reasons.
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 7b807d389527..19b467fe0388 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -1304,11 +1304,7 @@ static void digi_release(struct usb_serial *serial)
 
 static int digi_port_probe(struct usb_serial_port *port)
 {
-	unsigned port_num;
-
-	port_num = port->number - port->serial->minor;
-
-	return digi_port_init(port, port_num);
+	return digi_port_init(port, port->port_number);
 }
 
 static int digi_port_remove(struct usb_serial_port *port)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 090b411d893f..350dfcb5fa62 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -288,15 +288,14 @@ static int f81232_ioctl(struct tty_struct *tty,
 	struct serial_struct ser;
 	struct usb_serial_port *port = tty->driver_data;
 
-	dev_dbg(&port->dev, "%s (%d) cmd = 0x%04x\n", __func__,
-		port->number, cmd);
+	dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
 
 	switch (cmd) {
 	case TIOCGSERIAL:
 		memset(&ser, 0, sizeof ser);
 		ser.type = PORT_16654;
 		ser.line = port->serial->minor;
-		ser.port = port->number;
+		ser.port = port->port_number;
 		ser.baud_base = 460800;
 
 		if (copy_to_user((void __user *)arg, &ser, sizeof ser))
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index b110c573ea85..04b5ed90ffb2 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -948,9 +948,9 @@ static void garmin_close(struct usb_serial_port *port)
 {
 	struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
 
-	dev_dbg(&port->dev, "%s - port %d - mode=%d state=%d flags=0x%X\n",
-		__func__, port->number, garmin_data_p->mode,
-		garmin_data_p->state, garmin_data_p->flags);
+	dev_dbg(&port->dev, "%s - mode=%d state=%d flags=0x%X\n",
+		__func__, garmin_data_p->mode, garmin_data_p->state,
+		garmin_data_p->flags);
 
 	garmin_clear(garmin_data_p);
 
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index 1477e8593476..0c27ff3d2e8f 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -915,8 +915,8 @@ static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 		return -ENOMEM;
 	}
 
-	dev_dbg(dev, "%s(%d) - Initialize TX fifo to %d bytes\n",
-		__func__, port->number, edge_port->maxTxCredits);
+	dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
+		__func__, edge_port->maxTxCredits);
 
 	return 0;
 }
@@ -1122,9 +1122,8 @@ static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 	copySize = min((unsigned int)count,
 				(edge_port->txCredits - fifo->count));
 
-	dev_dbg(&port->dev, "%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
-		__func__, port->number, count,
-			edge_port->txCredits - fifo->count, copySize);
+	dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
+		__func__, count, edge_port->txCredits - fifo->count, copySize);
 
 	/* catch writes of 0 bytes which the tty driver likes to give us,
 	   and when txCredits is empty */
@@ -1216,9 +1215,8 @@ static void send_more_port_data(struct edgeport_serial *edge_serial,
 	if (edge_port->write_in_progress ||
 	    !edge_port->open             ||
 	    (fifo->count == 0)) {
-		dev_dbg(dev, "%s(%d) EXIT - fifo %d, PendingWrite = %d\n",
-			__func__, edge_port->port->number,
-			fifo->count, edge_port->write_in_progress);
+		dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
+			__func__, fifo->count, edge_port->write_in_progress);
 		goto exit_send;
 	}
 
@@ -1230,9 +1228,8 @@ static void send_more_port_data(struct edgeport_serial *edge_serial,
 	 * it's better to wait for more credits so we can do a larger write.
 	 */
 	if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
-		dev_dbg(dev, "%s(%d) Not enough credit - fifo %d TxCredit %d\n",
-			__func__, edge_port->port->number, fifo->count,
-			edge_port->txCredits);
+		dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
+			__func__, fifo->count, edge_port->txCredits);
 		goto exit_send;
 	}
 
@@ -1256,10 +1253,8 @@ static void send_more_port_data(struct edgeport_serial *edge_serial,
 		edge_port->write_in_progress = false;
 		goto exit_send;
 	}
-	buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
-				- edge_port->port->serial->minor, count);
-	buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
-				- edge_port->port->serial->minor, count);
+	buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
+	buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
 
 	/* now copy our data */
 	bytesleft =  fifo->size - fifo->tail;
@@ -1377,8 +1372,7 @@ static int edge_chars_in_buffer(struct tty_struct *tty)
 						edge_port->txfifo.count;
 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
 	if (num_chars) {
-		dev_dbg(&port->dev, "%s(port %d) - returns %d\n", __func__,
-			port->number, num_chars);
+		dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
 	}
 
 	return num_chars;
@@ -1576,7 +1570,7 @@ static int get_serial_info(struct edgeport_port *edge_port,
 
 	tmp.type		= PORT_16550A;
 	tmp.line		= edge_port->port->serial->minor;
-	tmp.port		= edge_port->port->number;
+	tmp.port		= edge_port->port->port_number;
 	tmp.irq			= 0;
 	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= edge_port->maxTxCredits;
@@ -1601,15 +1595,15 @@ static int edge_ioctl(struct tty_struct *tty,
 	DEFINE_WAIT(wait);
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 
-	dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
+	dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
 
 	switch (cmd) {
 	case TIOCSERGETLSR:
-		dev_dbg(&port->dev, "%s (%d) TIOCSERGETLSR\n", __func__,  port->number);
+		dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
 		return get_lsr_info(edge_port, (unsigned int __user *) arg);
 
 	case TIOCGSERIAL:
-		dev_dbg(&port->dev, "%s (%d) TIOCGSERIAL\n", __func__,  port->number);
+		dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
 		return get_serial_info(edge_port, (struct serial_struct __user *) arg);
 	}
 	return -ENOIOCTLCMD;
@@ -2181,9 +2175,8 @@ static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
 
 	currentCommand = buffer;
 
-	MAKE_CMD_EXT_CMD(&currentCommand, &length,
-		edge_port->port->number - edge_port->port->serial->minor,
-		command, param);
+	MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
+			 command, param);
 
 	status = write_cmd_usb(edge_port, buffer, length);
 	if (status) {
@@ -2266,18 +2259,16 @@ static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 	int cmdLen = 0;
 	int divisor;
 	int status;
-	unsigned char number =
-		edge_port->port->number - edge_port->port->serial->minor;
+	u32 number = edge_port->port->port_number;
 
 	if (edge_serial->is_epic &&
 	    !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
-		dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d\n",
-			edge_port->port->number, baudRate);
+		dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
+			baudRate);
 		return 0;
 	}
 
-	dev_dbg(dev, "%s - port = %d, baud = %d\n", __func__,
-		edge_port->port->number, baudRate);
+	dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
 
 	status = calc_baud_rate_divisor(dev, baudRate, &divisor);
 	if (status) {
@@ -2388,9 +2379,8 @@ static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
 	currCmd = cmdBuffer;
 
 	/* Build a cmd in the buffer to write the given register */
-	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
-		edge_port->port->number - edge_port->port->serial->minor,
-		regNum, regValue);
+	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
+			   regNum, regValue);
 
 	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
 	if (status) {
@@ -2424,8 +2414,6 @@ static void change_port_settings(struct tty_struct *tty,
 	__u8 txFlow;
 	int status;
 
-	dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
-
 	if (!edge_port->open &&
 	    !edge_port->openPending) {
 		dev_dbg(dev, "%s - port not opened\n", __func__);
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 1be6ba7bee27..d32bf2b7f988 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -259,7 +259,7 @@ static int send_cmd(struct usb_device *dev, __u8 command,
 /* clear tx/rx buffers and fifo in TI UMP */
 static int purge_port(struct usb_serial_port *port, __u16 mask)
 {
-	int port_number = port->number - port->serial->minor;
+	int port_number = port->port_number;
 
 	dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
 
@@ -1392,7 +1392,8 @@ stayinbootmode:
 
 static int ti_do_config(struct edgeport_port *port, int feature, int on)
 {
-	int port_number = port->port->number - port->port->serial->minor;
+	int port_number = port->port->port_number;
+
 	on = !!on;	/* 1 or 0 not bitmask */
 	return send_cmd(port->port->serial->dev,
 			feature, (__u8)(UMPM_UART1_PORT + port_number),
@@ -1637,7 +1638,7 @@ static void edge_bulk_in_callback(struct urb *urb)
 		return;
 	}
 
-	port_number = edge_port->port->number - edge_port->port->serial->minor;
+	port_number = edge_port->port->port_number;
 
 	if (edge_port->lsr_event) {
 		edge_port->lsr_event = 0;
@@ -1730,7 +1731,7 @@ static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 	if (edge_port == NULL)
 		return -ENODEV;
 
-	port_number = port->number - port->serial->minor;
+	port_number = port->port_number;
 	switch (port_number) {
 	case 0:
 		edge_port->uart_base = UMPMEM_BASE_UART1;
@@ -1908,7 +1909,7 @@ static void edge_close(struct usb_serial_port *port)
 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
 
 	dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
-	port_number = port->number - port->serial->minor;
+	port_number = port->port_number;
 	send_cmd(serial->dev, UMPC_CLOSE_PORT,
 		     (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
 
@@ -2137,10 +2138,7 @@ static void change_port_settings(struct tty_struct *tty,
 	int baud;
 	unsigned cflag;
 	int status;
-	int port_number = edge_port->port->number -
-					edge_port->port->serial->minor;
-
-	dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
+	int port_number = edge_port->port->port_number;
 
 	config = kmalloc (sizeof (*config), GFP_KERNEL);
 	if (!config) {
@@ -2284,7 +2282,6 @@ static void edge_set_termios(struct tty_struct *tty,
 		tty->termios.c_cflag, tty->termios.c_iflag);
 	dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
 		old_termios->c_cflag, old_termios->c_iflag);
-	dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 
 	if (edge_port == NULL)
 		return;
@@ -2367,7 +2364,7 @@ static int get_serial_info(struct edgeport_port *edge_port,
 
 	tmp.type		= PORT_16550A;
 	tmp.line		= edge_port->port->serial->minor;
-	tmp.port		= edge_port->port->number;
+	tmp.port		= edge_port->port->port_number;
 	tmp.irq			= 0;
 	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= edge_port->port->bulk_out_size;
@@ -2386,7 +2383,7 @@ static int edge_ioctl(struct tty_struct *tty,
 	struct usb_serial_port *port = tty->driver_data;
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 
-	dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
+	dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
 
 	switch (cmd) {
 	case TIOCGSERIAL:
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 28365e647168..5a979729f8ec 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -152,7 +152,7 @@ static void keyspan_set_termios(struct tty_struct *tty,
 	p_priv = usb_get_serial_port_data(port);
 	d_details = p_priv->device_details;
 	cflag = tty->termios.c_cflag;
-	device_port = port->number - port->serial->minor;
+	device_port = port->port_number;
 
 	/* Baud rate calculation takes baud rate as an integer
 	   so other rates can be generated if desired. */
@@ -234,8 +234,8 @@ static int keyspan_write(struct tty_struct *tty,
 		dataOffset = 1;
 	}
 
-	dev_dbg(&port->dev, "%s - for port %d (%d chars), flip=%d\n",
-		__func__, port->number, count, p_priv->out_flip);
+	dev_dbg(&port->dev, "%s - %d chars, flip=%d\n", __func__, count,
+		p_priv->out_flip);
 
 	for (left = count; left > 0; left -= todo) {
 		todo = left;
@@ -1041,7 +1041,7 @@ static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port)
 	/* get the terminal config for the setup message now so we don't
 	 * need to send 2 of them */
 
-	device_port = port->number - port->serial->minor;
+	device_port = port->port_number;
 	if (tty) {
 		cflag = tty->termios.c_cflag;
 		/* Baud rate calculation takes baud rate as an integer
@@ -1547,7 +1547,7 @@ static int keyspan_usa26_send_setup(struct usb_serial *serial,
 	s_priv = usb_get_serial_data(serial);
 	p_priv = usb_get_serial_port_data(port);
 	d_details = s_priv->device_details;
-	device_port = port->number - port->serial->minor;
+	device_port = port->port_number;
 
 	this_urb = p_priv->outcont_urb;
 
@@ -1691,7 +1691,7 @@ static int keyspan_usa28_send_setup(struct usb_serial *serial,
 	s_priv = usb_get_serial_data(serial);
 	p_priv = usb_get_serial_port_data(port);
 	d_details = s_priv->device_details;
-	device_port = port->number - port->serial->minor;
+	device_port = port->port_number;
 
 	/* only do something if we have a bulk out endpoint */
 	this_urb = p_priv->outcont_urb;
@@ -1821,17 +1821,16 @@ static int keyspan_usa49_send_setup(struct usb_serial *serial,
 	this_urb = s_priv->glocont_urb;
 
 	/* Work out which port within the device is being setup */
-	device_port = port->number - port->serial->minor;
+	device_port = port->port_number;
 
 	/* Make sure we have an urb then send the message */
 	if (this_urb == NULL) {
-		dev_dbg(&port->dev, "%s - oops no urb for port %d.\n", __func__, port->number);
+		dev_dbg(&port->dev, "%s - oops no urb for port.\n", __func__);
 		return -1;
 	}
 
-	dev_dbg(&port->dev, "%s - endpoint %d port %d (%d)\n",
-		__func__, usb_pipeendpoint(this_urb->pipe),
-		port->number, device_port);
+	dev_dbg(&port->dev, "%s - endpoint %d (%d)\n",
+		__func__, usb_pipeendpoint(this_urb->pipe), device_port);
 
 	/* Save reset port val for resend.
 	   Don't overwrite resend for open/close condition. */
@@ -1846,7 +1845,6 @@ static int keyspan_usa49_send_setup(struct usb_serial *serial,
 
 	memset(&msg, 0, sizeof(struct keyspan_usa49_portControlMessage));
 
-	/*msg.portNumber = port->number;*/
 	msg.portNumber = device_port;
 
 	/* Only set baud rate if it's changed */
@@ -2136,12 +2134,11 @@ static int keyspan_usa67_send_setup(struct usb_serial *serial,
 	this_urb = s_priv->glocont_urb;
 
 	/* Work out which port within the device is being setup */
-	device_port = port->number - port->serial->minor;
+	device_port = port->port_number;
 
 	/* Make sure we have an urb then send the message */
 	if (this_urb == NULL) {
-		dev_dbg(&port->dev, "%s - oops no urb for port %d.\n", __func__,
-			port->number);
+		dev_dbg(&port->dev, "%s - oops no urb for port.\n", __func__);
 		return -1;
 	}
 
@@ -2382,7 +2379,7 @@ static int keyspan_port_probe(struct usb_serial_port *port)
 	/* Setup values for the various callback routines */
 	cback = &keyspan_callbacks[d_details->msg_format];
 
-	port_num = port->number - port->serial->minor;
+	port_num = port->port_number;
 
 	/* Do indat endpoints first, once for each flip */
 	endp = d_details->indat_endpoints[port_num];
diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c
index 47e247759eb0..40ccf6e5e318 100644
--- a/drivers/usb/serial/metro-usb.c
+++ b/drivers/usb/serial/metro-usb.c
@@ -224,8 +224,8 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
 	result = metrousb_send_unidirectional_cmd(UNI_CMD_OPEN, port);
 	if (result) {
 		dev_err(&port->dev,
-			"%s - failed to configure device for port number=%d, error code=%d\n",
-			__func__, port->number, result);
+			"%s - failed to configure device, error code=%d\n",
+			__func__, result);
 		goto exit;
 	}
 
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index f27c621a9297..f79ae7fe37ff 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -1047,7 +1047,7 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
 	  *
 	  * 0x08 : SP1/2 Control Reg
 	  */
-	port_number = port->number - port->serial->minor;
+	port_number = port->port_number;
 	read_mos_reg(serial, port_number, LSR, &data);
 
 	dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data);
@@ -1066,7 +1066,7 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
 
 	write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00);
 	read_mos_reg(serial, dummy, SP_CONTROL_REG, &data);
-	data = data | (port->number - port->serial->minor + 1);
+	data = data | (port->port_number + 1);
 	write_mos_reg(serial, dummy, SP_CONTROL_REG, data);
 	mos7720_port->shadowLCR = 0x83;
 	write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
@@ -1147,8 +1147,8 @@ static void mos7720_close(struct usb_serial_port *port)
 	usb_kill_urb(port->write_urb);
 	usb_kill_urb(port->read_urb);
 
-	write_mos_reg(serial, port->number - port->serial->minor, MCR, 0x00);
-	write_mos_reg(serial, port->number - port->serial->minor, IER, 0x00);
+	write_mos_reg(serial, port->port_number, MCR, 0x00);
+	write_mos_reg(serial, port->port_number, IER, 0x00);
 
 	mos7720_port->open = 0;
 }
@@ -1172,8 +1172,7 @@ static void mos7720_break(struct tty_struct *tty, int break_state)
 		data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
 
 	mos7720_port->shadowLCR  = data;
-	write_mos_reg(serial, port->number - port->serial->minor,
-		      LCR, mos7720_port->shadowLCR);
+	write_mos_reg(serial, port->port_number, LCR, mos7720_port->shadowLCR);
 }
 
 /*
@@ -1304,8 +1303,8 @@ static void mos7720_throttle(struct tty_struct *tty)
 	/* if we are implementing RTS/CTS, toggle that line */
 	if (tty->termios.c_cflag & CRTSCTS) {
 		mos7720_port->shadowMCR &= ~UART_MCR_RTS;
-		write_mos_reg(port->serial, port->number - port->serial->minor,
-			      MCR, mos7720_port->shadowMCR);
+		write_mos_reg(port->serial, port->port_number, MCR,
+			      mos7720_port->shadowMCR);
 		if (status != 0)
 			return;
 	}
@@ -1336,8 +1335,8 @@ static void mos7720_unthrottle(struct tty_struct *tty)
 	/* if we are implementing RTS/CTS, toggle that line */
 	if (tty->termios.c_cflag & CRTSCTS) {
 		mos7720_port->shadowMCR |= UART_MCR_RTS;
-		write_mos_reg(port->serial, port->number - port->serial->minor,
-			      MCR, mos7720_port->shadowMCR);
+		write_mos_reg(port->serial, port->port_number, MCR,
+			      mos7720_port->shadowMCR);
 		if (status != 0)
 			return;
 	}
@@ -1361,7 +1360,7 @@ static int set_higher_rates(struct moschip_port *mos7720_port,
 	 *      Init Sequence for higher rates
 	 ***********************************************/
 	dev_dbg(&port->dev, "Sending Setting Commands ..........\n");
-	port_number = port->number - port->serial->minor;
+	port_number = port->port_number;
 
 	write_mos_reg(serial, port_number, IER, 0x00);
 	write_mos_reg(serial, port_number, FCR, 0x00);
@@ -1487,7 +1486,7 @@ static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
 	port = mos7720_port->port;
 	serial = port->serial;
 
-	number = port->number - port->serial->minor;
+	number = port->port_number;
 	dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate);
 
 	/* Calculate the Divisor */
@@ -1538,7 +1537,7 @@ static void change_port_settings(struct tty_struct *tty,
 
 	port = mos7720_port->port;
 	serial = port->serial;
-	port_number = port->number - port->serial->minor;
+	port_number = port->port_number;
 
 	if (!mos7720_port->open) {
 		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
@@ -1731,7 +1730,7 @@ static int get_lsr_info(struct tty_struct *tty,
 	struct usb_serial_port *port = tty->driver_data;
 	unsigned int result = 0;
 	unsigned char data = 0;
-	int port_number = port->number - port->serial->minor;
+	int port_number = port->port_number;
 	int count;
 
 	count = mos7720_chars_in_buffer(tty);
@@ -1793,8 +1792,8 @@ static int mos7720_tiocmset(struct tty_struct *tty,
 		mcr &= ~UART_MCR_LOOP;
 
 	mos7720_port->shadowMCR = mcr;
-	write_mos_reg(port->serial, port->number - port->serial->minor,
-		      MCR, mos7720_port->shadowMCR);
+	write_mos_reg(port->serial, port->port_number, MCR,
+		      mos7720_port->shadowMCR);
 
 	return 0;
 }
@@ -1838,8 +1837,8 @@ static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
 	}
 
 	mos7720_port->shadowMCR = mcr;
-	write_mos_reg(port->serial, port->number - port->serial->minor,
-		      MCR, mos7720_port->shadowMCR);
+	write_mos_reg(port->serial, port->port_number, MCR,
+		      mos7720_port->shadowMCR);
 
 	return 0;
 }
@@ -1856,7 +1855,7 @@ static int get_serial_info(struct moschip_port *mos7720_port,
 
 	tmp.type		= PORT_16550A;
 	tmp.line		= mos7720_port->port->serial->minor;
-	tmp.port		= mos7720_port->port->number;
+	tmp.port		= mos7720_port->port->port_number;
 	tmp.irq			= 0;
 	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size	= NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 7e998081e1cd..f981b08ff32f 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -303,15 +303,12 @@ static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
 	/* For the UART control registers, the application number need
 	   to be Or'ed */
 	if (port->serial->num_ports == 4) {
-		val |= (((__u16) port->number -
-				(__u16) (port->serial->minor)) + 1) << 8;
+		val |= ((__u16)port->port_number + 1) << 8;
 	} else {
-		if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
-			val |= (((__u16) port->number -
-			      (__u16) (port->serial->minor)) + 1) << 8;
+		if (port->port_number == 0) {
+			val |= ((__u16)port->port_number + 1) << 8;
 		} else {
-			val |= (((__u16) port->number -
-			      (__u16) (port->serial->minor)) + 2) << 8;
+			val |= ((__u16)port->port_number + 2) << 8;
 		}
 	}
 	dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
@@ -340,16 +337,12 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
 
 	/* Wval  is same as application number */
 	if (port->serial->num_ports == 4) {
-		Wval =
-		    (((__u16) port->number - (__u16) (port->serial->minor)) +
-		     1) << 8;
+		Wval = ((__u16)port->port_number + 1) << 8;
 	} else {
-		if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
-			Wval = (((__u16) port->number -
-			      (__u16) (port->serial->minor)) + 1) << 8;
+		if (port->port_number == 0) {
+			Wval = ((__u16)port->port_number + 1) << 8;
 		} else {
-			Wval = (((__u16) port->number -
-			      (__u16) (port->serial->minor)) + 2) << 8;
+			Wval = ((__u16)port->port_number + 2) << 8;
 		}
 	}
 	dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
@@ -631,9 +624,7 @@ static void mos7840_interrupt_callback(struct urb *urb)
 
 	for (i = 0; i < serial->num_ports; i++) {
 		mos7840_port = mos7840_get_port_private(serial->port[i]);
-		wval =
-		    (((__u16) serial->port[i]->number -
-		      (__u16) (serial->minor)) + 1) << 8;
+		wval = ((__u16)serial->port[i]->port_number + 1) << 8;
 		if (mos7840_port->open) {
 			if (sp[i] & 0x01) {
 				dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
@@ -1065,8 +1056,8 @@ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
 	 * (can't set it up in mos7840_startup as the  *
 	 * structures were not set up at that time.)   */
 
-	dev_dbg(&port->dev, "port number is %d\n", port->number);
-	dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
+	dev_dbg(&port->dev, "port number is %d\n", port->port_number);
+	dev_dbg(&port->dev, "minor number is %d\n", port->serial->minor);
 	dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
 	dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
 	dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
@@ -1074,9 +1065,7 @@ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
 	mos7840_port->read_urb = port->read_urb;
 
 	/* set up our bulk in urb */
-	if ((serial->num_ports == 2)
-		&& ((((__u16)port->number -
-			(__u16)(port->serial->minor)) % 2) != 0)) {
+	if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
 		usb_fill_bulk_urb(mos7840_port->read_urb,
 			serial->dev,
 			usb_rcvbulkpipe(serial->dev,
@@ -1199,7 +1188,7 @@ static void mos7840_close(struct usb_serial_port *port)
 	mos7840_port->read_urb_busy = false;
 
 	port0->open_ports--;
-	dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
+	dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
 	if (port0->open_ports == 0) {
 		if (serial->port[0]->interrupt_in_urb) {
 			dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
@@ -1435,9 +1424,7 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
 	memcpy(urb->transfer_buffer, current_position, transfer_size);
 
 	/* fill urb with data and submit  */
-	if ((serial->num_ports == 2)
-		&& ((((__u16)port->number -
-			(__u16)(port->serial->minor)) % 2) != 0)) {
+	if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
 		usb_fill_bulk_urb(urb,
 			serial->dev,
 			usb_sndbulkpipe(serial->dev,
@@ -1732,10 +1719,9 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
 	if (mos7840_serial_paranoia_check(port->serial, __func__))
 		return -1;
 
-	number = mos7840_port->port->number - mos7840_port->port->serial->minor;
+	number = mos7840_port->port->port_number;
 
-	dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
-		mos7840_port->port->number, baudRate);
+	dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
 	/* reset clk_uart_sel in spregOffset */
 	if (baudRate > 115200) {
 #ifdef HW_flow_control
@@ -2016,7 +2002,6 @@ static void mos7840_set_termios(struct tty_struct *tty,
 		tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
 	dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
 		old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
-	dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 
 	/* change the port settings to the new ones specified */
 
@@ -2084,7 +2069,7 @@ static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
 
 	tmp.type = PORT_16550A;
 	tmp.line = mos7840_port->port->serial->minor;
-	tmp.port = mos7840_port->port->number;
+	tmp.port = mos7840_port->port->port_number;
 	tmp.irq = 0;
 	tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 	tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
@@ -2240,7 +2225,7 @@ static int mos7840_port_probe(struct usb_serial_port *port)
 	/* we set up the pointers to the endpoints in the mos7840_open *
 	 * function, as the structures aren't created yet.             */
 
-	pnum = port->number - serial->minor;
+	pnum = port->port_number;
 
 	dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
 	mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
@@ -2261,7 +2246,6 @@ static int mos7840_port_probe(struct usb_serial_port *port)
 	 * usb-serial.c:get_free_serial() and cannot therefore be used
 	 * to index device instances */
 	mos7840_port->port_num = pnum + 1;
-	dev_dbg(&port->dev, "port->number = %d\n", port->number);
 	dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
 	dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
 	dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 5f4b0cd0f6e9..6e1ee85e44f2 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -367,7 +367,7 @@ static int opticon_ioctl(struct tty_struct *tty,
 {
 	struct usb_serial_port *port = tty->driver_data;
 
-	dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
+	dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
 
 	switch (cmd) {
 	case TIOCGSERIAL:
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 97c1e6a9dd4f..966c20c9ced4 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -640,7 +640,7 @@ static int pl2303_ioctl(struct tty_struct *tty,
 		memset(&ser, 0, sizeof ser);
 		ser.type = PORT_16654;
 		ser.line = port->serial->minor;
-		ser.port = port->number;
+		ser.port = port->port_number;
 		ser.baud_base = 460800;
 
 		if (copy_to_user((void __user *)arg, &ser, sizeof ser))
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index b0a9478a8c9e..f2ca7d80c8a0 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -343,7 +343,7 @@ static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
 	int status;
 	unsigned long flags;
 
-	device_port = (u16) (port->number - port->serial->minor);
+	device_port = port->port_number;
 
 	serial = port->serial;
 
@@ -388,9 +388,8 @@ static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
 	status = qt2_set_port_config(serial->dev, device_port,
 				     DEFAULT_BAUD_RATE, UART_LCR_WLEN8);
 	if (status < 0) {
-		dev_err(&port->dev,
-			"%s - initial setup failed for port %i (%i)\n",
-			__func__, port->number, device_port);
+		dev_err(&port->dev, "%s - initial setup failed (%i)\n",
+			__func__, device_port);
 		return status;
 	}
 
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 8894665cd610..de958c5b52e3 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -914,7 +914,7 @@ static int sierra_port_probe(struct usb_serial_port *port)
 		/* This is really the usb-serial port number of the interface
 		 * rather than the interface number.
 		 */
-		ifnum = port->number - serial->minor;
+		ifnum = port->port_number;
 		himemoryp = &typeA_interface_list;
 	}
 
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index c92c5ed4e580..07e5c9bec48a 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -476,7 +476,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 	if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 		return -ERESTARTSYS;
 
-	port_number = port->number - port->serial->minor;
+	port_number = port->port_number;
 
 	tport->tp_msr = 0;
 	tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
@@ -618,7 +618,7 @@ static void ti_close(struct usb_serial_port *port)
 	kfifo_reset_out(&tport->write_fifo);
 	spin_unlock_irqrestore(&tport->tp_lock, flags);
 
-	port_number = port->number - port->serial->minor;
+	port_number = port->port_number;
 
 	dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 	status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
@@ -776,7 +776,7 @@ static void ti_set_termios(struct tty_struct *tty,
 	tcflag_t cflag, iflag;
 	int baud;
 	int status;
-	int port_number = port->number - port->serial->minor;
+	int port_number = port->port_number;
 	unsigned int mcr;
 
 	cflag = tty->termios.c_cflag;
@@ -1262,7 +1262,7 @@ static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
 	int size, status;
 	struct ti_device *tdev = tport->tp_tdev;
 	struct usb_serial_port *port = tport->tp_port;
-	int port_number = port->number - port->serial->minor;
+	int port_number = port->port_number;
 	struct ti_port_status *data;
 
 	size = sizeof(struct ti_port_status);
@@ -1309,7 +1309,7 @@ static int ti_get_serial_info(struct ti_port *tport,
 
 	ret_serial.type = PORT_16550A;
 	ret_serial.line = port->serial->minor;
-	ret_serial.port = port->number - port->serial->minor;
+	ret_serial.port = port->port_number;
 	ret_serial.flags = tport->tp_flags;
 	ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
 	ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 5f6b1ff9d29e..a47fa715aaba 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -105,9 +105,10 @@ static struct usb_serial *get_free_serial(struct usb_serial *serial,
 		*minor = i;
 		j = 0;
 		dev_dbg(&serial->interface->dev, "%s - minor base = %d\n", __func__, *minor);
-		for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) {
+		for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i, ++j) {
 			serial_table[i] = serial;
-			serial->port[j++]->number = i;
+			serial->port[j]->minor = i;
+			serial->port[j]->port_number = i - *minor;
 		}
 		mutex_unlock(&table_lock);
 		return serial;
@@ -1048,7 +1049,7 @@ static int usb_serial_probe(struct usb_interface *interface,
 	/* register all of the individual ports with the driver core */
 	for (i = 0; i < num_ports; ++i) {
 		port = serial->port[i];
-		dev_set_name(&port->dev, "ttyUSB%d", port->number);
+		dev_set_name(&port->dev, "ttyUSB%d", port->minor);
 		dev_dbg(ddev, "registering %s", dev_name(&port->dev));
 		device_enable_async_suspend(&port->dev);
 
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index ece326ef63a0..eacc27dc4657 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -125,7 +125,7 @@ static int get_serial_info(struct usb_serial_port *port,
 
 	memset(&tmp, 0, sizeof(tmp));
 	tmp.line            = port->serial->minor;
-	tmp.port            = port->number;
+	tmp.port            = port->port_number;
 	tmp.baud_base       = tty_get_baud_rate(port->port.tty);
 	tmp.close_delay	    = port->port.close_delay / 10;
 	tmp.closing_wait    = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 347caad47a12..7eb34cd6b579 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -462,7 +462,7 @@ static int whiteheat_ioctl(struct tty_struct *tty,
 		memset(&serstruct, 0, sizeof(serstruct));
 		serstruct.type = PORT_16654;
 		serstruct.line = port->serial->minor;
-		serstruct.port = port->number;
+		serstruct.port = port->port_number;
 		serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 		serstruct.xmit_fifo_size = kfifo_size(&port->write_fifo);
 		serstruct.custom_divisor = 0;
@@ -626,7 +626,7 @@ static int firm_open(struct usb_serial_port *port)
 {
 	struct whiteheat_simple open_command;
 
-	open_command.port = port->number - port->serial->minor + 1;
+	open_command.port = port->port_number + 1;
 	return firm_send_command(port, WHITEHEAT_OPEN,
 		(__u8 *)&open_command, sizeof(open_command));
 }
@@ -636,7 +636,7 @@ static int firm_close(struct usb_serial_port *port)
 {
 	struct whiteheat_simple close_command;
 
-	close_command.port = port->number - port->serial->minor + 1;
+	close_command.port = port->port_number + 1;
 	return firm_send_command(port, WHITEHEAT_CLOSE,
 			(__u8 *)&close_command, sizeof(close_command));
 }
@@ -649,7 +649,7 @@ static void firm_setup_port(struct tty_struct *tty)
 	struct whiteheat_port_settings port_settings;
 	unsigned int cflag = tty->termios.c_cflag;
 
-	port_settings.port = port->number - port->serial->minor + 1;
+	port_settings.port = port->port_number + 1;
 
 	/* get the byte size */
 	switch (cflag & CSIZE) {
@@ -726,7 +726,7 @@ static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
 {
 	struct whiteheat_set_rdb rts_command;
 
-	rts_command.port = port->number - port->serial->minor + 1;
+	rts_command.port = port->port_number + 1;
 	rts_command.state = onoff;
 	return firm_send_command(port, WHITEHEAT_SET_RTS,
 			(__u8 *)&rts_command, sizeof(rts_command));
@@ -737,7 +737,7 @@ static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
 {
 	struct whiteheat_set_rdb dtr_command;
 
-	dtr_command.port = port->number - port->serial->minor + 1;
+	dtr_command.port = port->port_number + 1;
 	dtr_command.state = onoff;
 	return firm_send_command(port, WHITEHEAT_SET_DTR,
 			(__u8 *)&dtr_command, sizeof(dtr_command));
@@ -748,7 +748,7 @@ static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
 {
 	struct whiteheat_set_rdb break_command;
 
-	break_command.port = port->number - port->serial->minor + 1;
+	break_command.port = port->port_number + 1;
 	break_command.state = onoff;
 	return firm_send_command(port, WHITEHEAT_SET_BREAK,
 			(__u8 *)&break_command, sizeof(break_command));
@@ -759,7 +759,7 @@ static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
 {
 	struct whiteheat_purge purge_command;
 
-	purge_command.port = port->number - port->serial->minor + 1;
+	purge_command.port = port->port_number + 1;
 	purge_command.what = rxtx;
 	return firm_send_command(port, WHITEHEAT_PURGE,
 			(__u8 *)&purge_command, sizeof(purge_command));
@@ -770,7 +770,7 @@ static int firm_get_dtr_rts(struct usb_serial_port *port)
 {
 	struct whiteheat_simple get_dr_command;
 
-	get_dr_command.port = port->number - port->serial->minor + 1;
+	get_dr_command.port = port->port_number + 1;
 	return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
 			(__u8 *)&get_dr_command, sizeof(get_dr_command));
 }
@@ -780,7 +780,7 @@ static int firm_report_tx_done(struct usb_serial_port *port)
 {
 	struct whiteheat_simple close_command;
 
-	close_command.port = port->number - port->serial->minor + 1;
+	close_command.port = port->port_number + 1;
 	return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
 			(__u8 *)&close_command, sizeof(close_command));
 }
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 302ddf55d2da..3fa68b615ac1 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -37,7 +37,8 @@
  * @serial: pointer back to the struct usb_serial owner of this port.
  * @port: pointer to the corresponding tty_port for this port.
  * @lock: spinlock to grab when updating portions of this structure.
- * @number: the number of the port (the minor number).
+ * @minor: the minor number of the port
+ * @port_number: the struct usb_serial port number of this port (starts at 0)
  * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
  * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
  * @interrupt_in_endpointAddress: endpoint address for the interrupt in pipe
@@ -80,7 +81,8 @@ struct usb_serial_port {
 	struct usb_serial	*serial;
 	struct tty_port		port;
 	spinlock_t		lock;
-	unsigned char		number;
+	u32			minor;
+	u8			port_number;
 
 	unsigned char		*interrupt_in_buffer;
 	struct urb		*interrupt_in_urb;