USB: serial: ports: add minor and port number

The usb_serial_port structure had the number field, which was the minor
number for the port, which almost no one really cared about.  They
really wanted the number of the port within the device, which you had to
subtract from the minor of the parent usb_serial_device structure.  To
clean this up, provide the real minor number of the port, and the number
of the port within the serial device separately, as these numbers might
not be related in the future.

Bonus is that this cleans up a lot of logic in the drivers, and saves
lines overall.
Tested-by: Tobias Winter <tobias@linuxdingsda.de>
Reviewed-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

--
 drivers/staging/serqt_usb2/serqt_usb2.c |   21 +++--------
 drivers/usb/serial/ark3116.c            |    2 -
 drivers/usb/serial/bus.c                |    6 +--
 drivers/usb/serial/console.c            |    2 -
 drivers/usb/serial/cp210x.c             |    2 -
 drivers/usb/serial/cypress_m8.c         |    4 +-
 drivers/usb/serial/digi_acceleport.c    |    6 ---
 drivers/usb/serial/f81232.c             |    5 +-
 drivers/usb/serial/garmin_gps.c         |    6 +--
 drivers/usb/serial/io_edgeport.c        |   58 ++++++++++++--------------------
 drivers/usb/serial/io_ti.c              |   21 ++++-------
 drivers/usb/serial/keyspan.c            |   29 +++++++---------
 drivers/usb/serial/metro-usb.c          |    4 +-
 drivers/usb/serial/mos7720.c            |   37 +++++++++-----------
 drivers/usb/serial/mos7840.c            |   52 +++++++++-------------------
 drivers/usb/serial/opticon.c            |    2 -
 drivers/usb/serial/pl2303.c             |    2 -
 drivers/usb/serial/quatech2.c           |    7 +--
 drivers/usb/serial/sierra.c             |    2 -
 drivers/usb/serial/ti_usb_3410_5052.c   |   10 ++---
 drivers/usb/serial/usb-serial.c         |    7 ++-
 drivers/usb/serial/usb_wwan.c           |    2 -
 drivers/usb/serial/whiteheat.c          |   20 +++++------
 include/linux/usb/serial.h              |    6 ++-
 24 files changed, 133 insertions(+), 180 deletions(-)

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) {

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;
 

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);

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__);

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;
 

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.

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)

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))

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);
 

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__);

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 @@ static int download_fw(struct edgeport_serial *serial)
 
 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:

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];

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;
 	}
 

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;

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);

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:

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))

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;
 	}
 

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;
 	}
 

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;

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);
 

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 ?

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));
 }

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;