#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/usb.h>
-#include <asm/uaccess.h>
-#include "usb-serial.h"
+#include <linux/usb/serial.h>
+#include <linux/uaccess.h>
+#include <linux/kfifo.h>
static int debug;
#ifdef CONFIG_USB_SERIAL_GENERIC
+
+static int generic_probe(struct usb_interface *interface,
+ const struct usb_device_id *id);
+
static __u16 vendor = 0x05f9;
static __u16 product = 0xffff;
static struct usb_device_id generic_device_ids[2]; /* Initially all zeroes. */
+/* we want to look at all devices, as the vendor/product id can change
+ * depending on the command line argument */
+static struct usb_device_id generic_serial_ids[] = {
+ {.driver_info = 42},
+ {}
+};
+
+static struct usb_driver generic_driver = {
+ .name = "usbserial_generic",
+ .probe = generic_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = generic_serial_ids,
+ .no_dynamic_id = 1,
+};
+
/* All of the device info needed for the Generic Serial Converter */
struct usb_serial_driver usb_serial_generic_device = {
.driver = {
.name = "generic",
},
.id_table = generic_device_ids,
- .num_interrupt_in = NUM_DONT_CARE,
- .num_bulk_in = NUM_DONT_CARE,
- .num_bulk_out = NUM_DONT_CARE,
+ .usb_driver = &generic_driver,
.num_ports = 1,
- .shutdown = usb_serial_generic_shutdown,
-};
-
-/* we want to look at all devices, as the vendor/product id can change
- * depending on the command line argument */
-static struct usb_device_id generic_serial_ids[] = {
- {.driver_info = 42},
- {}
+ .disconnect = usb_serial_generic_disconnect,
+ .release = usb_serial_generic_release,
+ .throttle = usb_serial_generic_throttle,
+ .unthrottle = usb_serial_generic_unthrottle,
+ .resume = usb_serial_generic_resume,
};
static int generic_probe(struct usb_interface *interface,
return usb_serial_probe(interface, id);
return -ENODEV;
}
-
-static struct usb_driver generic_driver = {
- .name = "usbserial_generic",
- .probe = generic_probe,
- .disconnect = usb_serial_disconnect,
- .id_table = generic_serial_ids,
- .no_dynamic_id = 1,
-};
#endif
-int usb_serial_generic_register (int _debug)
+int usb_serial_generic_register(int _debug)
{
int retval = 0;
#ifdef CONFIG_USB_SERIAL_GENERIC
generic_device_ids[0].idVendor = vendor;
generic_device_ids[0].idProduct = product;
- generic_device_ids[0].match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT;
+ generic_device_ids[0].match_flags =
+ USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT;
/* register our generic driver with ourselves */
- retval = usb_serial_register (&usb_serial_generic_device);
+ retval = usb_serial_register(&usb_serial_generic_device);
if (retval)
goto exit;
retval = usb_register(&generic_driver);
return retval;
}
-void usb_serial_generic_deregister (void)
+void usb_serial_generic_deregister(void)
{
#ifdef CONFIG_USB_SERIAL_GENERIC
/* remove our generic driver */
usb_deregister(&generic_driver);
- usb_serial_deregister (&usb_serial_generic_device);
+ usb_serial_deregister(&usb_serial_generic_device);
#endif
}
-int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp)
+int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
int result = 0;
+ unsigned long flags;
- dbg("%s - port %d", __FUNCTION__, port->number);
+ dbg("%s - port %d", __func__, port->number);
- /* force low_latency on so that our tty_push actually forces the data through,
- otherwise it is scheduled, and with high data rates (like with OHCI) data
- can get lost. */
- if (port->tty)
- port->tty->low_latency = 1;
+ /* clear the throttle flags */
+ spin_lock_irqsave(&port->lock, flags);
+ port->throttled = 0;
+ port->throttle_req = 0;
+ spin_unlock_irqrestore(&port->lock, flags);
- /* if we have a bulk interrupt, start reading from it */
+ /* if we have a bulk endpoint, start reading from it */
if (serial->num_bulk_in) {
/* Start reading from the device */
- usb_fill_bulk_urb (port->read_urb, serial->dev,
- usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),
+ usb_fill_bulk_urb(port->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
port->read_urb->transfer_buffer,
port->read_urb->transfer_buffer_length,
((serial->type->read_bulk_callback) ?
port);
result = usb_submit_urb(port->read_urb, GFP_KERNEL);
if (result)
- dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+ dev_err(&port->dev,
+ "%s - failed resubmitting read urb, error %d\n",
+ __func__, result);
}
return result;
}
EXPORT_SYMBOL_GPL(usb_serial_generic_open);
-static void generic_cleanup (struct usb_serial_port *port)
+static void generic_cleanup(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
- dbg("%s - port %d", __FUNCTION__, port->number);
+ dbg("%s - port %d", __func__, port->number);
if (serial->dev) {
/* shutdown any bulk reads that might be going on */
}
}
-void usb_serial_generic_close (struct usb_serial_port *port, struct file * filp)
+void usb_serial_generic_close(struct usb_serial_port *port)
{
- dbg("%s - port %d", __FUNCTION__, port->number);
- generic_cleanup (port);
+ dbg("%s - port %d", __func__, port->number);
+ generic_cleanup(port);
}
-int usb_serial_generic_write(struct usb_serial_port *port, const unsigned char *buf, int count)
+static int usb_serial_multi_urb_write(struct tty_struct *tty,
+ struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+ unsigned long flags;
+ struct urb *urb;
+ unsigned char *buffer;
+ int status;
+ int towrite;
+ int bwrite = 0;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (count == 0)
+ dbg("%s - write request of 0 bytes", __func__);
+
+ while (count > 0) {
+ towrite = (count > port->bulk_out_size) ?
+ port->bulk_out_size : count;
+ spin_lock_irqsave(&port->lock, flags);
+ if (port->urbs_in_flight >
+ port->serial->type->max_in_flight_urbs) {
+ spin_unlock_irqrestore(&port->lock, flags);
+ dbg("%s - write limit hit\n", __func__);
+ return bwrite;
+ }
+ port->tx_bytes_flight += towrite;
+ port->urbs_in_flight++;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ buffer = kmalloc(towrite, GFP_ATOMIC);
+ if (!buffer) {
+ dev_err(&port->dev,
+ "%s ran out of kernel memory for urb ...\n", __func__);
+ goto error_no_buffer;
+ }
+
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urb) {
+ dev_err(&port->dev, "%s - no more free urbs\n",
+ __func__);
+ goto error_no_urb;
+ }
+
+ /* Copy data */
+ memcpy(buffer, buf + bwrite, towrite);
+ usb_serial_debug_data(debug, &port->dev, __func__,
+ towrite, buffer);
+ /* fill the buffer and send it */
+ usb_fill_bulk_urb(urb, port->serial->dev,
+ usb_sndbulkpipe(port->serial->dev,
+ port->bulk_out_endpointAddress),
+ buffer, towrite,
+ usb_serial_generic_write_bulk_callback, port);
+
+ status = usb_submit_urb(urb, GFP_ATOMIC);
+ if (status) {
+ dev_err(&port->dev,
+ "%s - failed submitting write urb, error %d\n",
+ __func__, status);
+ goto error;
+ }
+
+ /* This urb is the responsibility of the host driver now */
+ usb_free_urb(urb);
+ dbg("%s write: %d", __func__, towrite);
+ count -= towrite;
+ bwrite += towrite;
+ }
+ return bwrite;
+
+error:
+ usb_free_urb(urb);
+error_no_urb:
+ kfree(buffer);
+error_no_buffer:
+ spin_lock_irqsave(&port->lock, flags);
+ port->urbs_in_flight--;
+ port->tx_bytes_flight -= towrite;
+ spin_unlock_irqrestore(&port->lock, flags);
+ return bwrite;
+}
+
+/**
+ * usb_serial_generic_write_start - kick off an URB write
+ * @port: Pointer to the &struct usb_serial_port data
+ *
+ * Returns the number of bytes queued on success. This will be zero if there
+ * was nothing to send. Otherwise, it returns a negative errno value
+ */
+static int usb_serial_generic_write_start(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
- int result;
unsigned char *data;
+ int result;
+ int count;
+ unsigned long flags;
+ bool start_io;
+
+ /* Atomically determine whether we can and need to start a USB
+ * operation. */
+ spin_lock_irqsave(&port->lock, flags);
+ if (port->write_urb_busy)
+ start_io = false;
+ else {
+ start_io = (kfifo_len(&port->write_fifo) != 0);
+ port->write_urb_busy = start_io;
+ }
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ if (!start_io)
+ return 0;
+
+ data = port->write_urb->transfer_buffer;
+ count = kfifo_out_locked(&port->write_fifo, data, port->bulk_out_size, &port->lock);
+ usb_serial_debug_data(debug, &port->dev, __func__, count, data);
+
+ /* set up our urb */
+ usb_fill_bulk_urb(port->write_urb, serial->dev,
+ usb_sndbulkpipe(serial->dev,
+ port->bulk_out_endpointAddress),
+ port->write_urb->transfer_buffer, count,
+ ((serial->type->write_bulk_callback) ?
+ serial->type->write_bulk_callback :
+ usb_serial_generic_write_bulk_callback),
+ port);
+
+ /* send the data out the bulk port */
+ result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+ if (result) {
+ dev_err(&port->dev,
+ "%s - failed submitting write urb, error %d\n",
+ __func__, result);
+ /* don't have to grab the lock here, as we will
+ retry if != 0 */
+ port->write_urb_busy = 0;
+ } else
+ result = count;
- dbg("%s - port %d", __FUNCTION__, port->number);
+ return result;
+}
+
+/**
+ * usb_serial_generic_write - generic write function for serial USB devices
+ * @tty: Pointer to &struct tty_struct for the device
+ * @port: Pointer to the &usb_serial_port structure for the device
+ * @buf: Pointer to the data to write
+ * @count: Number of bytes to write
+ *
+ * Returns the number of characters actually written, which may be anything
+ * from zero to @count. If an error occurs, it returns the negative errno
+ * value.
+ */
+int usb_serial_generic_write(struct tty_struct *tty,
+ struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+ struct usb_serial *serial = port->serial;
+ int result;
+
+ dbg("%s - port %d", __func__, port->number);
if (count == 0) {
- dbg("%s - write request of 0 bytes", __FUNCTION__);
- return (0);
+ dbg("%s - write request of 0 bytes", __func__);
+ return 0;
}
/* only do something if we have a bulk out endpoint */
- if (serial->num_bulk_out) {
- spin_lock(&port->lock);
- if (port->write_urb_busy) {
- spin_unlock(&port->lock);
- dbg("%s - already writing", __FUNCTION__);
- return 0;
- }
- port->write_urb_busy = 1;
- spin_unlock(&port->lock);
-
- count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
-
- memcpy (port->write_urb->transfer_buffer, buf, count);
- data = port->write_urb->transfer_buffer;
- usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, data);
-
- /* set up our urb */
- usb_fill_bulk_urb (port->write_urb, serial->dev,
- usb_sndbulkpipe (serial->dev,
- port->bulk_out_endpointAddress),
- port->write_urb->transfer_buffer, count,
- ((serial->type->write_bulk_callback) ?
- serial->type->write_bulk_callback :
- usb_serial_generic_write_bulk_callback), port);
-
- /* send the data out the bulk port */
- port->write_urb_busy = 1;
- result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
- if (result) {
- dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
- /* don't have to grab the lock here, as we will retry if != 0 */
- port->write_urb_busy = 0;
- } else
- result = count;
+ if (!serial->num_bulk_out)
+ return 0;
- return result;
- }
+ if (serial->type->max_in_flight_urbs)
+ return usb_serial_multi_urb_write(tty, port,
+ buf, count);
- /* no bulk out, so return 0 bytes written */
- return 0;
+ count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);
+ result = usb_serial_generic_write_start(port);
+
+ if (result >= 0)
+ result = count;
+
+ return result;
}
+EXPORT_SYMBOL_GPL(usb_serial_generic_write);
-int usb_serial_generic_write_room (struct usb_serial_port *port)
+int usb_serial_generic_write_room(struct tty_struct *tty)
{
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = port->serial;
+ unsigned long flags;
int room = 0;
- dbg("%s - port %d", __FUNCTION__, port->number);
-
- if (serial->num_bulk_out) {
- if (!(port->write_urb_busy))
- room = port->bulk_out_size;
- }
-
- dbg("%s - returns %d", __FUNCTION__, room);
- return (room);
+ dbg("%s - port %d", __func__, port->number);
+ spin_lock_irqsave(&port->lock, flags);
+ if (serial->type->max_in_flight_urbs) {
+ if (port->urbs_in_flight < serial->type->max_in_flight_urbs)
+ room = port->bulk_out_size *
+ (serial->type->max_in_flight_urbs -
+ port->urbs_in_flight);
+ } else if (serial->num_bulk_out)
+ room = kfifo_avail(&port->write_fifo);
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ dbg("%s - returns %d", __func__, room);
+ return room;
}
-int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port)
+int usb_serial_generic_chars_in_buffer(struct tty_struct *tty)
{
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = port->serial;
int chars = 0;
+ unsigned long flags;
- dbg("%s - port %d", __FUNCTION__, port->number);
+ dbg("%s - port %d", __func__, port->number);
- if (serial->num_bulk_out) {
- if (port->write_urb_busy)
- chars = port->write_urb->transfer_buffer_length;
- }
+ spin_lock_irqsave(&port->lock, flags);
+ if (serial->type->max_in_flight_urbs)
+ chars = port->tx_bytes_flight;
+ else if (serial->num_bulk_out)
+ chars = kfifo_len(&port->write_fifo);
+ spin_unlock_irqrestore(&port->lock, flags);
- dbg("%s - returns %d", __FUNCTION__, chars);
- return (chars);
+ dbg("%s - returns %d", __func__, chars);
+ return chars;
}
-void usb_serial_generic_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
+
+void usb_serial_generic_resubmit_read_urb(struct usb_serial_port *port,
+ gfp_t mem_flags)
{
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+ struct urb *urb = port->read_urb;
struct usb_serial *serial = port->serial;
- struct tty_struct *tty;
- unsigned char *data = urb->transfer_buffer;
int result;
- dbg("%s - port %d", __FUNCTION__, port->number);
+ /* Continue reading from device */
+ usb_fill_bulk_urb(urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ urb->transfer_buffer,
+ urb->transfer_buffer_length,
+ ((serial->type->read_bulk_callback) ?
+ serial->type->read_bulk_callback :
+ usb_serial_generic_read_bulk_callback), port);
+ result = usb_submit_urb(urb, mem_flags);
+ if (result)
+ dev_err(&port->dev,
+ "%s - failed resubmitting read urb, error %d\n",
+ __func__, result);
+}
+EXPORT_SYMBOL_GPL(usb_serial_generic_resubmit_read_urb);
- if (urb->status) {
- dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
- return;
+/* Push data to tty layer and resubmit the bulk read URB */
+static void flush_and_resubmit_read_urb(struct usb_serial_port *port)
+{
+ struct urb *urb = port->read_urb;
+ struct tty_struct *tty = tty_port_tty_get(&port->port);
+ char *ch = (char *)urb->transfer_buffer;
+ int i;
+
+ if (!tty)
+ goto done;
+
+ /* The per character mucking around with sysrq path it too slow for
+ stuff like 3G modems, so shortcircuit it in the 99.9999999% of cases
+ where the USB serial is not a console anyway */
+ if (!port->console || !port->sysrq)
+ tty_insert_flip_string(tty, ch, urb->actual_length);
+ else {
+ /* Push data to tty */
+ for (i = 0; i < urb->actual_length; i++, ch++) {
+ if (!usb_serial_handle_sysrq_char(tty, port, *ch))
+ tty_insert_flip_char(tty, *ch, TTY_NORMAL);
+ }
}
+ tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
+done:
+ usb_serial_generic_resubmit_read_urb(port, GFP_ATOMIC);
+}
+
+void usb_serial_generic_read_bulk_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ unsigned char *data = urb->transfer_buffer;
+ int status = urb->status;
+ unsigned long flags;
- usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
+ dbg("%s - port %d", __func__, port->number);
- tty = port->tty;
- if (tty && urb->actual_length) {
- tty_buffer_request_room(tty, urb->actual_length);
- tty_insert_flip_string(tty, data, urb->actual_length);
- tty_flip_buffer_push(tty);
+ if (unlikely(status != 0)) {
+ dbg("%s - nonzero read bulk status received: %d",
+ __func__, status);
+ return;
}
- /* Continue trying to always read */
- usb_fill_bulk_urb (port->read_urb, serial->dev,
- usb_rcvbulkpipe (serial->dev,
- port->bulk_in_endpointAddress),
- port->read_urb->transfer_buffer,
- port->read_urb->transfer_buffer_length,
- ((serial->type->read_bulk_callback) ?
- serial->type->read_bulk_callback :
- usb_serial_generic_read_bulk_callback), port);
- result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
- if (result)
- dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+ usb_serial_debug_data(debug, &port->dev, __func__,
+ urb->actual_length, data);
+
+ /* Throttle the device if requested by tty */
+ spin_lock_irqsave(&port->lock, flags);
+ port->throttled = port->throttle_req;
+ if (!port->throttled) {
+ spin_unlock_irqrestore(&port->lock, flags);
+ flush_and_resubmit_read_urb(port);
+ } else
+ spin_unlock_irqrestore(&port->lock, flags);
}
EXPORT_SYMBOL_GPL(usb_serial_generic_read_bulk_callback);
-void usb_serial_generic_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
+void usb_serial_generic_write_bulk_callback(struct urb *urb)
{
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
-
- dbg("%s - port %d", __FUNCTION__, port->number);
+ unsigned long flags;
+ struct usb_serial_port *port = urb->context;
+ int status = urb->status;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (port->serial->type->max_in_flight_urbs) {
+ kfree(urb->transfer_buffer);
+
+ spin_lock_irqsave(&port->lock, flags);
+ --port->urbs_in_flight;
+ port->tx_bytes_flight -= urb->transfer_buffer_length;
+ if (port->urbs_in_flight < 0)
+ port->urbs_in_flight = 0;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ if (status) {
+ dbg("%s - nonzero multi-urb write bulk status "
+ "received: %d", __func__, status);
+ return;
+ }
+ } else {
+ port->write_urb_busy = 0;
- port->write_urb_busy = 0;
- if (urb->status) {
- dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
- return;
+ if (status) {
+ dbg("%s - nonzero multi-urb write bulk status "
+ "received: %d", __func__, status);
+ kfifo_reset_out(&port->write_fifo);
+ } else
+ usb_serial_generic_write_start(port);
}
usb_serial_port_softint(port);
}
EXPORT_SYMBOL_GPL(usb_serial_generic_write_bulk_callback);
-void usb_serial_generic_shutdown (struct usb_serial *serial)
+void usb_serial_generic_throttle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ unsigned long flags;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ /* Set the throttle request flag. It will be picked up
+ * by usb_serial_generic_read_bulk_callback(). */
+ spin_lock_irqsave(&port->lock, flags);
+ port->throttle_req = 1;
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+void usb_serial_generic_unthrottle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ int was_throttled;
+ unsigned long flags;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ /* Clear the throttle flags */
+ spin_lock_irqsave(&port->lock, flags);
+ was_throttled = port->throttled;
+ port->throttled = port->throttle_req = 0;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ if (was_throttled) {
+ /* Resume reading from device */
+ flush_and_resubmit_read_urb(port);
+ }
+}
+
+int usb_serial_handle_sysrq_char(struct tty_struct *tty,
+ struct usb_serial_port *port, unsigned int ch)
+{
+ if (port->sysrq && port->console) {
+ if (ch && time_before(jiffies, port->sysrq)) {
+ handle_sysrq(ch, tty);
+ port->sysrq = 0;
+ return 1;
+ }
+ port->sysrq = 0;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_serial_handle_sysrq_char);
+
+int usb_serial_handle_break(struct usb_serial_port *port)
+{
+ if (!port->sysrq) {
+ port->sysrq = jiffies + HZ*5;
+ return 1;
+ }
+ port->sysrq = 0;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_serial_handle_break);
+
+int usb_serial_generic_resume(struct usb_serial *serial)
+{
+ struct usb_serial_port *port;
+ int i, c = 0, r;
+
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ if (!port->port.count)
+ continue;
+
+ if (port->read_urb) {
+ r = usb_submit_urb(port->read_urb, GFP_NOIO);
+ if (r < 0)
+ c++;
+ }
+
+ if (port->write_urb) {
+ r = usb_serial_generic_write_start(port);
+ if (r < 0)
+ c++;
+ }
+ }
+
+ return c ? -EIO : 0;
+}
+EXPORT_SYMBOL_GPL(usb_serial_generic_resume);
+
+void usb_serial_generic_disconnect(struct usb_serial *serial)
{
int i;
- dbg("%s", __FUNCTION__);
+ dbg("%s", __func__);
/* stop reads and writes on all ports */
- for (i=0; i < serial->num_ports; ++i) {
+ for (i = 0; i < serial->num_ports; ++i)
generic_cleanup(serial->port[i]);
- }
}
+void usb_serial_generic_release(struct usb_serial *serial)
+{
+ dbg("%s", __func__);
+}
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