usb-serial: put subroutines in logical order

This patch (as1285) rearranges the subroutines in usb-serial.c
concerned with tty lifetimes into a more logical order: install, open,
hangup, close, release.  It also updates the formatting of the
kerneldoc comments.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/usb-serial.c

@@ -166,6 +166,41 @@ void usb_serial_put(struct usb_serial *serial)
 /*****************************************************************************
  * Driver tty interface functions
  *****************************************************************************/
+
+/**
+ * serial_install - install tty
+ * @driver: the driver (USB in our case)
+ * @tty: the tty being created
+ *
+ * Create the termios objects for this tty.  We use the default
+ * USB serial settings but permit them to be overridden by
+ * serial->type->init_termios.
+ */
+static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+	int idx = tty->index;
+	struct usb_serial *serial;
+	int retval;
+
+	/* If the termios setup has yet to be done */
+	if (tty->driver->termios[idx] == NULL) {
+		/* perform the standard setup */
+		retval = tty_init_termios(tty);
+		if (retval)
+			return retval;
+		/* allow the driver to update it */
+		serial = usb_serial_get_by_index(tty->index);
+		if (serial->type->init_termios)
+			serial->type->init_termios(tty);
+		usb_serial_put(serial);
+	}
+	/* Final install (we use the default method) */
+	tty_driver_kref_get(driver);
+	tty->count++;
+	driver->ttys[idx] = tty;
+	return 0;
+}
+
 static int serial_open (struct tty_struct *tty, struct file *filp)
 {
 	struct usb_serial *serial;
@@ -264,13 +299,11 @@ static int serial_open (struct tty_struct *tty, struct file *filp)
 }
 
 /**
- *	serial_do_down		-	shut down hardware
- *	@port: port to shut down
+ * serial_do_down - shut down hardware
+ * @port: port to shut down
  *
- *	Shut down a USB port unless it is the console. We never shut down the
- *	console hardware as it will always be in use.
- *
- *	Don't free any resources at this point
+ * Shut down a USB serial port unless it is the console.  We never
+ * shut down the console hardware as it will always be in use.
  */
 static void serial_do_down(struct usb_serial_port *port)
 {
@@ -278,8 +311,10 @@ static void serial_do_down(struct usb_serial_port *port)
 	struct usb_serial *serial;
 	struct module *owner;
 
-	/* The console is magical, do not hang up the console hardware
-	   or there will be tears */
+	/*
+	 * The console is magical.  Do not hang up the console hardware
+	 * or there will be tears.
+	 */
 	if (port->console)
 		return;
 
@@ -293,24 +328,50 @@ static void serial_do_down(struct usb_serial_port *port)
 	mutex_unlock(&port->mutex);
 }
 
+static void serial_hangup(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	serial_do_down(port);
+	tty_port_hangup(&port->port);
+	/* We must not free port yet - the USB serial layer depends on it's
+	   continued existence */
+}
+
+static void serial_close(struct tty_struct *tty, struct file *filp)
+{
+	struct usb_serial_port *port = tty->driver_data;
+
+	if (!port)
+		return;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (tty_port_close_start(&port->port, tty, filp) == 0)
+		return;
+	serial_do_down(port);
+	tty_port_close_end(&port->port, tty);
+	tty_port_tty_set(&port->port, NULL);
+
+}
+
 /**
- *	serial_do_free		-	free resources post close/hangup
- *	@port: port to free up
+ * serial_do_free - free resources post close/hangup
+ * @port: port to free up
  *
- *	Do the resource freeing and refcount dropping for the port. We must
- *	be careful about ordering and we must avoid freeing up the console.
+ * Do the resource freeing and refcount dropping for the port.
+ * Avoid freeing the console.
  *
- *	Called when the last tty kref is dropped.
+ * Called when the last tty kref is dropped.
  */
-
 static void serial_do_free(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct usb_serial *serial;
 	struct module *owner;
 
-	/* The console is magical, do not hang up the console hardware
-	   or there will be tears */
+	/* The console is magical.  Do not hang up the console hardware
+	 * or there will be tears.
+	 */
 	if (port == NULL || port->console)
 		return;
 
@@ -326,32 +387,6 @@ static void serial_do_free(struct tty_struct *tty)
 	module_put(owner);
 }
 
-static void serial_close(struct tty_struct *tty, struct file *filp)
-{
-	struct usb_serial_port *port = tty->driver_data;
-
-	if (!port)
-		return;
-
-	dbg("%s - port %d", __func__, port->number);
-
-	if (tty_port_close_start(&port->port, tty, filp) == 0)
-		return;
-	serial_do_down(port);		
-	tty_port_close_end(&port->port, tty);
-	tty_port_tty_set(&port->port, NULL);
-
-}
-
-static void serial_hangup(struct tty_struct *tty)
-{
-	struct usb_serial_port *port = tty->driver_data;
-	serial_do_down(port);
-	tty_port_hangup(&port->port);
-	/* We must not free port yet - the USB serial layer depends on it's
-	   continued existence */
-}
-
 static int serial_write(struct tty_struct *tty, const unsigned char *buf,
 								int count)
 {
@@ -699,41 +734,6 @@ static const struct tty_port_operations serial_port_ops = {
 	.dtr_rts = serial_dtr_rts,
 };
 
-/**
- *	serial_install		-	install tty
- *	@driver: the driver (USB in our case)
- *	@tty: the tty being created
- *
- *	Create the termios objects for this tty. We use the default USB
- *	serial ones but permit them to be overriddenby serial->type->termios.
- *	This lets us remove all the ugly hackery
- */
-
-static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
-{
-	int idx = tty->index;
-	struct usb_serial *serial;
-	int retval;
-
-	/* If the termios setup has yet to be done */
-	if (tty->driver->termios[idx] == NULL) {
-		/* perform the standard setup */
-		retval = tty_init_termios(tty);
-		if (retval)
-			return retval;
-		/* allow the driver to update it */
-		serial = usb_serial_get_by_index(tty->index);
-		if (serial->type->init_termios)
-			serial->type->init_termios(tty);
-		usb_serial_put(serial);
-	}
-	/* Final install (we use the default method) */
-	tty_driver_kref_get(driver);
-	tty->count++;
-	driver->ttys[idx] = tty;
-	return 0;
-}
-
 int usb_serial_probe(struct usb_interface *interface,
 			       const struct usb_device_id *id)
 {