USB: cp210x: remove redundant disconnect()

Remove cp210x_disconnect which is used to kill traffic although this is
already handled by the generic framework.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/cp210x.c

@@ -34,7 +34,6 @@
  * Function Prototypes
  */
 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
-static void cp210x_cleanup(struct usb_serial_port *);
 static void cp210x_close(struct usb_serial_port *);
 static void cp210x_get_termios(struct tty_struct *,
 	struct usb_serial_port *port);
@@ -49,7 +48,6 @@ static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
 		unsigned int, unsigned int);
 static void cp210x_break_ctl(struct tty_struct *, int);
 static int cp210x_startup(struct usb_serial *);
-static void cp210x_disconnect(struct usb_serial *);
 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
 static int cp210x_carrier_raised(struct usb_serial_port *p);
 
@@ -147,7 +145,6 @@ static struct usb_serial_driver cp210x_device = {
 	.tiocmget 		= cp210x_tiocmget,
 	.tiocmset		= cp210x_tiocmset,
 	.attach			= cp210x_startup,
-	.disconnect		= cp210x_disconnect,
 	.dtr_rts		= cp210x_dtr_rts,
 	.carrier_raised		= cp210x_carrier_raised
 };
@@ -391,21 +388,6 @@ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
 	return 0;
 }
 
-static void cp210x_cleanup(struct usb_serial_port *port)
-{
-	struct usb_serial *serial = port->serial;
-
-	dbg("%s - port %d", __func__, port->number);
-
-	if (serial->dev) {
-		/* shutdown any bulk reads that might be going on */
-		if (serial->num_bulk_out)
-			usb_kill_urb(port->write_urb);
-		if (serial->num_bulk_in)
-			usb_kill_urb(port->read_urb);
-	}
-}
-
 static void cp210x_close(struct usb_serial_port *port)
 {
 	dbg("%s - port %d", __func__, port->number);
@@ -794,17 +776,6 @@ static int cp210x_startup(struct usb_serial *serial)
 	return 0;
 }
 
-static void cp210x_disconnect(struct usb_serial *serial)
-{
-	int i;
-
-	dbg("%s", __func__);
-
-	/* Stop reads and writes on all ports */
-	for (i = 0; i < serial->num_ports; ++i)
-		cp210x_cleanup(serial->port[i]);
-}
-
 static int __init cp210x_init(void)
 {
 	int retval;