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Commit 92931d24 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

USB: serial: core: clean up dbg and printk usage. 



This cleans up the usb-serial module to remove all old usages of dbg()
and "raw" printk() calls for error reporting (there are some info
messages left for now.)

Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fee84a54

drivers/usb/serial/console.c

+8 −7
Original line number Diff line number Diff line
@@ -11,6 +11,8 @@ 
 *

 */



#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt



#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/slab.h>
@@ -111,8 +113,7 @@ static int usb_console_setup(struct console *co, char *options) 
	serial = usb_serial_get_by_index(co->index);

	if (serial == NULL) {

		/* no device is connected yet, sorry :( */

		printk(KERN_ERR "No USB device connected to ttyUSB%i\n",

		       co->index);

		pr_err("No USB device connected to ttyUSB%i\n", co->index);

		return -ENODEV;

	}
@@ -211,10 +212,10 @@ static void usb_console_write(struct console *co, 
	if (count == 0)

		return;



	dbg("%s - port %d, %d byte(s)", __func__, port->number, count);

	pr_debug("%s - port %d, %d byte(s)\n", __func__, port->number, count);



	if (!port->port.console) {

		dbg("%s - port not opened", __func__);

		pr_debug("%s - port not opened\n", __func__);

		return;

	}
@@ -235,7 +236,7 @@ static void usb_console_write(struct console *co, 
			retval = serial->type->write(NULL, port, buf, i);

		else

			retval = usb_serial_generic_write(NULL, port, buf, i);

		dbg("%s - return value : %d", __func__, retval);

		pr_debug("%s - return value : %d\n", __func__, retval);

		if (lf) {

			/* append CR after LF */

			unsigned char cr = 13;
@@ -245,7 +246,7 @@ static void usb_console_write(struct console *co, 
			else

				retval = usb_serial_generic_write(NULL,

								port, &cr, 1);

			dbg("%s - return value : %d", __func__, retval);

			pr_debug("%s - return value : %d\n", __func__, retval);

		}

		buf += i;

		count -= i;
@@ -300,7 +301,7 @@ void usb_serial_console_init(int serial_debug, int minor) 
		 * register_console). console_write() is called immediately

		 * from register_console iff CON_PRINTBUFFER is set in flags.

		 */

		dbg("registering the USB serial console.");

		pr_debug("registering the USB serial console.\n");

		register_console(&usbcons);

	}

}

drivers/usb/serial/usb-serial.c

+69 −77
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ 
 *

 */



#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt



#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/init.h>
@@ -87,7 +89,7 @@ static struct usb_serial *get_free_serial(struct usb_serial *serial, 
	unsigned int i, j;

	int good_spot;



	dbg("%s %d", __func__, num_ports);

	dev_dbg(&serial->interface->dev, "%s %d\n", __func__, num_ports);



	*minor = 0;

	mutex_lock(&table_lock);
@@ -107,7 +109,7 @@ static struct usb_serial *get_free_serial(struct usb_serial *serial, 


		*minor = i;

		j = 0;

		dbg("%s - minor base = %d", __func__, *minor);

		dev_dbg(&serial->interface->dev, "%s - minor base = %d\n", __func__, *minor);

		for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) {

			serial_table[i] = serial;

			serial->port[j++]->number = i;
@@ -137,8 +139,6 @@ static void destroy_serial(struct kref *kref) 


	serial = to_usb_serial(kref);



	dbg("%s - %s", __func__, serial->type->description);



	/* return the minor range that this device had */

	if (serial->minor != SERIAL_TTY_NO_MINOR)

		return_serial(serial);
@@ -252,7 +252,7 @@ static int serial_open(struct tty_struct *tty, struct file *filp) 
{

	struct usb_serial_port *port = tty->driver_data;



	dbg("%s - port %d", __func__, port->number);

	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);

	return tty_port_open(&port->port, tty, filp);

}
@@ -283,14 +283,16 @@ static void serial_down(struct tty_port *tport) 
static void serial_hangup(struct tty_struct *tty)

{

	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __func__, port->number);



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);

	tty_port_hangup(&port->port);

}



static void serial_close(struct tty_struct *tty, struct file *filp)

{

	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __func__, port->number);



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);

	tty_port_close(&port->port, tty, filp);

}
@@ -316,7 +318,7 @@ static void serial_cleanup(struct tty_struct *tty) 
	if (port->port.console)

		return;



	dbg("%s - port %d", __func__, port->number);

	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	tty->driver_data = NULL;
@@ -341,7 +343,8 @@ static int serial_write(struct tty_struct *tty, const unsigned char *buf, 
	if (port->serial->dev->state == USB_STATE_NOTATTACHED)

		goto exit;



	dbg("%s - port %d, %d byte(s)", __func__, port->number, count);

	dev_dbg(tty->dev, "%s - port %d, %d byte(s)\n", __func__,

		port->number, count);



	/* pass on to the driver specific version of this function */

	retval = port->serial->type->write(tty, port, buf, count);
@@ -354,7 +357,8 @@ exit: 
static int serial_write_room(struct tty_struct *tty)

{

	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __func__, port->number);



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);

	/* pass on to the driver specific version of this function */

	return port->serial->type->write_room(tty);

}
@@ -362,7 +366,8 @@ static int serial_write_room(struct tty_struct *tty) 
static int serial_chars_in_buffer(struct tty_struct *tty)

{

	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __func__, port->number);



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	/* if the device was unplugged then any remaining characters

	   fell out of the connector ;) */
@@ -375,7 +380,8 @@ static int serial_chars_in_buffer(struct tty_struct *tty) 
static void serial_throttle(struct tty_struct *tty)

{

	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __func__, port->number);



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	/* pass on to the driver specific version of this function */

	if (port->serial->type->throttle)
@@ -385,7 +391,8 @@ static void serial_throttle(struct tty_struct *tty) 
static void serial_unthrottle(struct tty_struct *tty)

{

	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __func__, port->number);



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	/* pass on to the driver specific version of this function */

	if (port->serial->type->unthrottle)
@@ -398,7 +405,8 @@ static int serial_ioctl(struct tty_struct *tty, 
	struct usb_serial_port *port = tty->driver_data;

	int retval = -ENODEV;



	dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);

	dev_dbg(tty->dev, "%s - port %d, cmd 0x%.4x\n", __func__,

		port->number, cmd);



	/* pass on to the driver specific version of this function

	   if it is available */
@@ -412,7 +420,8 @@ static int serial_ioctl(struct tty_struct *tty, 
static void serial_set_termios(struct tty_struct *tty, struct ktermios *old)

{

	struct usb_serial_port *port = tty->driver_data;

	dbg("%s - port %d", __func__, port->number);



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	/* pass on to the driver specific version of this function

	   if it is available */
@@ -426,7 +435,7 @@ static int serial_break(struct tty_struct *tty, int break_state) 
{

	struct usb_serial_port *port = tty->driver_data;



	dbg("%s - port %d", __func__, port->number);

	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	/* pass on to the driver specific version of this function

	   if it is available */
@@ -485,7 +494,7 @@ static int serial_tiocmget(struct tty_struct *tty) 
{

	struct usb_serial_port *port = tty->driver_data;



	dbg("%s - port %d", __func__, port->number);

	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	if (port->serial->type->tiocmget)

		return port->serial->type->tiocmget(tty);
@@ -497,7 +506,7 @@ static int serial_tiocmset(struct tty_struct *tty, 
{

	struct usb_serial_port *port = tty->driver_data;



	dbg("%s - port %d", __func__, port->number);

	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	if (port->serial->type->tiocmset)

		return port->serial->type->tiocmset(tty, set, clear);
@@ -509,7 +518,7 @@ static int serial_get_icount(struct tty_struct *tty, 
{

	struct usb_serial_port *port = tty->driver_data;



	dbg("%s - port %d", __func__, port->number);

	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	if (port->serial->type->get_icount)

		return port->serial->type->get_icount(tty, icount);
@@ -533,12 +542,12 @@ static void usb_serial_port_work(struct work_struct *work) 
		container_of(work, struct usb_serial_port, work);

	struct tty_struct *tty;



	dbg("%s - port %d", __func__, port->number);



	tty = tty_port_tty_get(&port->port);

	if (!tty)

		return;



	dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);



	tty_wakeup(tty);

	tty_kref_put(tty);

}
@@ -571,7 +580,7 @@ static void port_release(struct device *dev) 
	struct usb_serial_port *port = to_usb_serial_port(dev);

	int i;



	dbg ("%s - %s", __func__, dev_name(dev));

	dev_dbg(dev, "%s\n", __func__);



	/*

	 * Stop all the traffic before cancelling the work, so that
@@ -640,12 +649,12 @@ static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, 


	id = usb_match_id(intf, drv->id_table);

	if (id) {

		dbg("static descriptor matches");

		dev_dbg(&intf->dev, "static descriptor matches\n");

		goto exit;

	}

	id = match_dynamic_id(intf, drv);

	if (id)

		dbg("dynamic descriptor matches");

		dev_dbg(&intf->dev, "dynamic descriptor matches\n");

exit:

	return id;

}
@@ -699,6 +708,7 @@ static const struct tty_port_operations serial_port_ops = { 
static int usb_serial_probe(struct usb_interface *interface,

			       const struct usb_device_id *id)

{

	struct device *ddev = &interface->dev;

	struct usb_device *dev = interface_to_usbdev(interface);

	struct usb_serial *serial = NULL;

	struct usb_serial_port *port;
@@ -725,13 +735,13 @@ static int usb_serial_probe(struct usb_interface *interface, 
	type = search_serial_device(interface);

	if (!type) {

		mutex_unlock(&table_lock);

		dbg("none matched");

		dev_dbg(ddev, "none matched\n");

		return -ENODEV;

	}



	if (!try_module_get(type->driver.owner)) {

		mutex_unlock(&table_lock);

		dev_err(&interface->dev, "module get failed, exiting\n");

		dev_err(ddev, "module get failed, exiting\n");

		return -EIO;

	}

	mutex_unlock(&table_lock);
@@ -739,7 +749,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
	serial = create_serial(dev, interface, type);

	if (!serial) {

		module_put(type->driver.owner);

		dev_err(&interface->dev, "%s - out of memory\n", __func__);

		dev_err(ddev, "%s - out of memory\n", __func__);

		return -ENOMEM;

	}
@@ -751,7 +761,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
		retval = type->probe(serial, id);



		if (retval) {

			dbg("sub driver rejected device");

			dev_dbg(ddev, "sub driver rejected device\n");

			usb_serial_put(serial);

			module_put(type->driver.owner);

			return retval;
@@ -766,28 +776,28 @@ static int usb_serial_probe(struct usb_interface *interface, 


		if (usb_endpoint_is_bulk_in(endpoint)) {

			/* we found a bulk in endpoint */

			dbg("found bulk in on endpoint %d", i);

			dev_dbg(ddev, "found bulk in on endpoint %d\n", i);

			bulk_in_endpoint[num_bulk_in] = endpoint;

			++num_bulk_in;

		}



		if (usb_endpoint_is_bulk_out(endpoint)) {

			/* we found a bulk out endpoint */

			dbg("found bulk out on endpoint %d", i);

			dev_dbg(ddev, "found bulk out on endpoint %d\n", i);

			bulk_out_endpoint[num_bulk_out] = endpoint;

			++num_bulk_out;

		}



		if (usb_endpoint_is_int_in(endpoint)) {

			/* we found a interrupt in endpoint */

			dbg("found interrupt in on endpoint %d", i);

			dev_dbg(ddev, "found interrupt in on endpoint %d\n", i);

			interrupt_in_endpoint[num_interrupt_in] = endpoint;

			++num_interrupt_in;

		}



		if (usb_endpoint_is_int_out(endpoint)) {

			/* we found an interrupt out endpoint */

			dbg("found interrupt out on endpoint %d", i);

			dev_dbg(ddev, "found interrupt out on endpoint %d\n", i);

			interrupt_out_endpoint[num_interrupt_out] = endpoint;

			++num_interrupt_out;

		}
@@ -811,7 +821,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
				endpoint = &iface_desc->endpoint[i].desc;

				if (usb_endpoint_is_int_in(endpoint)) {

					/* we found a interrupt in endpoint */

					dbg("found interrupt in for Prolific device on separate interface");

					dev_dbg(ddev, "found interrupt in for Prolific device on separate interface\n");

					interrupt_in_endpoint[num_interrupt_in] = endpoint;

					++num_interrupt_in;

				}
@@ -823,7 +833,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
		 * properly during a later invocation of usb_serial_probe

		 */

		if (num_bulk_in == 0 || num_bulk_out == 0) {

			dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n");

			dev_info(ddev, "PL-2303 hack: descriptors matched but endpoints did not\n");

			usb_serial_put(serial);

			module_put(type->driver.owner);

			return -ENODEV;
@@ -836,14 +846,13 @@ static int usb_serial_probe(struct usb_interface *interface, 
	if (type == &usb_serial_generic_device) {

		num_ports = num_bulk_out;

		if (num_ports == 0) {

			dev_err(&interface->dev,

			    "Generic device with no bulk out, not allowed.\n");

			dev_err(ddev, "Generic device with no bulk out, not allowed.\n");

			usb_serial_put(serial);

			module_put(type->driver.owner);

			return -EIO;

		}

		dev_info(&interface->dev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n");

		dev_info(&interface->dev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n");

		dev_info(ddev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n");

		dev_info(ddev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n");

	}

#endif

	if (!num_ports) {
@@ -861,8 +870,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
	serial->num_interrupt_out = num_interrupt_out;



	/* found all that we need */

	dev_info(&interface->dev, "%s converter detected\n",

			type->description);

	dev_info(ddev, "%s converter detected\n", type->description);



	/* create our ports, we need as many as the max endpoints */

	/* we don't use num_ports here because some devices have more
@@ -873,8 +881,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
	max_endpoints = max(max_endpoints, (int)serial->num_ports);

	serial->num_port_pointers = max_endpoints;



	dbg("%s - setting up %d port structures for this device",

						__func__, max_endpoints);

	dev_dbg(ddev, "setting up %d port structures for this device", max_endpoints);

	for (i = 0; i < max_endpoints; ++i) {

		port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL);

		if (!port)
@@ -907,15 +914,13 @@ static int usb_serial_probe(struct usb_interface *interface, 
			set_bit(j, &port->read_urbs_free);

			port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);

			if (!port->read_urbs[j]) {

				dev_err(&interface->dev,

						"No free urbs available\n");

				dev_err(ddev, "No free urbs available\n");

				goto probe_error;

			}

			port->bulk_in_buffers[j] = kmalloc(buffer_size,

								GFP_KERNEL);

			if (!port->bulk_in_buffers[j]) {

				dev_err(&interface->dev,

					"Couldn't allocate bulk_in_buffer\n");

				dev_err(ddev, "Couldn't allocate bulk_in_buffer\n");

				goto probe_error;

			}

			usb_fill_bulk_urb(port->read_urbs[j], dev,
@@ -945,15 +950,13 @@ static int usb_serial_probe(struct usb_interface *interface, 
			set_bit(j, &port->write_urbs_free);

			port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);

			if (!port->write_urbs[j]) {

				dev_err(&interface->dev,

						"No free urbs available\n");

				dev_err(ddev, "No free urbs available\n");

				goto probe_error;

			}

			port->bulk_out_buffers[j] = kmalloc(buffer_size,

								GFP_KERNEL);

			if (!port->bulk_out_buffers[j]) {

				dev_err(&interface->dev,

					"Couldn't allocate bulk_out_buffer\n");

				dev_err(ddev, "Couldn't allocate bulk_out_buffer\n");

				goto probe_error;

			}

			usb_fill_bulk_urb(port->write_urbs[j], dev,
@@ -974,8 +977,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
			port = serial->port[i];

			port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);

			if (!port->interrupt_in_urb) {

				dev_err(&interface->dev,

						"No free urbs available\n");

				dev_err(ddev, "No free urbs available\n");

				goto probe_error;

			}

			buffer_size = usb_endpoint_maxp(endpoint);
@@ -984,8 +986,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
			port->interrupt_in_buffer = kmalloc(buffer_size,

								GFP_KERNEL);

			if (!port->interrupt_in_buffer) {

				dev_err(&interface->dev,

				    "Couldn't allocate interrupt_in_buffer\n");

				dev_err(ddev, "Couldn't allocate interrupt_in_buffer\n");

				goto probe_error;

			}

			usb_fill_int_urb(port->interrupt_in_urb, dev,
@@ -996,7 +997,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
				endpoint->bInterval);

		}

	} else if (num_interrupt_in) {

		dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined");

		dev_dbg(ddev, "The device claims to support interrupt in transfers, but read_int_callback is not defined\n");

	}



	if (serial->type->write_int_callback) {
@@ -1005,8 +1006,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
			port = serial->port[i];

			port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);

			if (!port->interrupt_out_urb) {

				dev_err(&interface->dev,

						"No free urbs available\n");

				dev_err(ddev, "No free urbs available\n");

				goto probe_error;

			}

			buffer_size = usb_endpoint_maxp(endpoint);
@@ -1016,8 +1016,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
			port->interrupt_out_buffer = kmalloc(buffer_size,

								GFP_KERNEL);

			if (!port->interrupt_out_buffer) {

				dev_err(&interface->dev,

				  "Couldn't allocate interrupt_out_buffer\n");

				dev_err(ddev, "Couldn't allocate interrupt_out_buffer\n");

				goto probe_error;

			}

			usb_fill_int_urb(port->interrupt_out_urb, dev,
@@ -1028,7 +1027,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
				endpoint->bInterval);

		}

	} else if (num_interrupt_out) {

		dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined");

		dev_dbg(ddev, "The device claims to support interrupt out transfers, but write_int_callback is not defined\n");

	}



	usb_set_intfdata(interface, serial);
@@ -1056,7 +1055,7 @@ static int usb_serial_probe(struct usb_interface *interface, 
	serial->disconnected = 1;



	if (get_free_serial(serial, num_ports, &minor) == NULL) {

		dev_err(&interface->dev, "No more free serial devices\n");

		dev_err(ddev, "No more free serial devices\n");

		goto probe_error;

	}

	serial->minor = minor;
@@ -1065,13 +1064,12 @@ static int usb_serial_probe(struct usb_interface *interface, 
	for (i = 0; i < num_ports; ++i) {

		port = serial->port[i];

		dev_set_name(&port->dev, "ttyUSB%d", port->number);

		dbg ("%s - registering %s", __func__, dev_name(&port->dev));

		dev_dbg(ddev, "registering %s", dev_name(&port->dev));

		device_enable_async_suspend(&port->dev);



		retval = device_add(&port->dev);

		if (retval)

			dev_err(&port->dev, "Error registering port device, "

				"continuing\n");

			dev_err(ddev, "Error registering port device, continuing\n");

	}



	serial->disconnected = 0;
@@ -1229,8 +1227,7 @@ static int __init usb_serial_init(void) 


	result = bus_register(&usb_serial_bus_type);

	if (result) {

		printk(KERN_ERR "usb-serial: %s - registering bus driver "

		       "failed\n", __func__);

		pr_err("%s - registering bus driver failed\n", __func__);

		goto exit_bus;

	}
@@ -1250,24 +1247,21 @@ static int __init usb_serial_init(void) 
	tty_set_operations(usb_serial_tty_driver, &serial_ops);

	result = tty_register_driver(usb_serial_tty_driver);

	if (result) {

		printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n",

		       __func__);

		pr_err("%s - tty_register_driver failed\n", __func__);

		goto exit_reg_driver;

	}



	/* register the USB driver */

	result = usb_register(&usb_serial_driver);

	if (result < 0) {

		printk(KERN_ERR "usb-serial: %s - usb_register failed\n",

		       __func__);

		pr_err("%s - usb_register failed\n", __func__);

		goto exit_tty;

	}



	/* register the generic driver, if we should */

	result = usb_serial_generic_register(debug);

	if (result < 0) {

		printk(KERN_ERR "usb-serial: %s - registering generic "

		       "driver failed\n", __func__);

		pr_err("%s - registering generic driver failed\n", __func__);

		goto exit_generic;

	}
@@ -1285,8 +1279,7 @@ exit_reg_driver: 
	bus_unregister(&usb_serial_bus_type);



exit_bus:

	printk(KERN_ERR "usb-serial: %s - returning with error %d\n",

	       __func__, result);

	pr_err("%s - returning with error %d\n", __func__, result);

	put_tty_driver(usb_serial_tty_driver);

	return result;

}
@@ -1312,7 +1305,7 @@ module_exit(usb_serial_exit); 
	do {								\

		if (!type->function) {					\

			type->function = usb_serial_generic_##function;	\

			dbg("Had to override the " #function		\

			pr_debug("Had to override the " #function	\

				" usb serial operation with the generic one.");\

			}						\

	} while (0)
@@ -1355,8 +1348,7 @@ static int usb_serial_register(struct usb_serial_driver *driver) 


	retval = usb_serial_bus_register(driver);

	if (retval) {

		printk(KERN_ERR "usb-serial: problem %d when registering "

		       "driver %s\n", retval, driver->description);

		pr_err("problem %d when registering driver %s\n", retval, driver->description);

		list_del(&driver->driver_list);

	} else

		printk(KERN_INFO "USB Serial support registered for %s\n",