USB: symbolserial: move private-data allocation to port_probe

Allocate port-private data in port-probe rather than in attach.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/symbolserial.c

 /*
  * Symbol USB barcode to serial driver
  *
+ * Copyright (C) 2013 Johan Hovold <jhovold@gmail.com>
  * Copyright (C) 2009 Greg Kroah-Hartman <gregkh@suse.de>
  * Copyright (C) 2009 Novell Inc.
  *
@@ -35,7 +36,7 @@ struct symbol_private {
 static void symbol_int_callback(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
-	struct symbol_private *priv = usb_get_serial_data(port->serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 	unsigned char *data = urb->transfer_buffer;
 	int status = urb->status;
 	int result;
@@ -153,30 +154,36 @@ static void symbol_unthrottle(struct tty_struct *tty)
 
 static int symbol_startup(struct usb_serial *serial)
 {
-	struct symbol_private *priv;
-
 	if (!serial->num_interrupt_in) {
 		dev_err(&serial->dev->dev, "no interrupt-in endpoint\n");
 		return -ENODEV;
 	}
 
-	/* create our private serial structure */
+	return 0;
+}
+
+static int symbol_port_probe(struct usb_serial_port *port)
+{
+	struct symbol_private *priv;
+
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (priv == NULL) {
-		dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
+	if (!priv)
 		return -ENOMEM;
-	}
+
 	spin_lock_init(&priv->lock);
 
-	usb_set_serial_data(serial, priv);
+	usb_set_serial_port_data(port, priv);
+
 	return 0;
 }
 
-static void symbol_release(struct usb_serial *serial)
+static int symbol_port_remove(struct usb_serial_port *port)
 {
-	struct symbol_private *priv = usb_get_serial_data(serial);
+	struct symbol_private *priv = usb_get_serial_port_data(port);
 
 	kfree(priv);
+
+	return 0;
 }
 
 static struct usb_serial_driver symbol_device = {
@@ -187,9 +194,10 @@ static struct usb_serial_driver symbol_device = {
 	.id_table =		id_table,
 	.num_ports =		1,
 	.attach =		symbol_startup,
+	.port_probe =		symbol_port_probe,
+	.port_remove =		symbol_port_remove,
 	.open =			symbol_open,
 	.close =		symbol_close,
-	.release =		symbol_release,
 	.throttle = 		symbol_throttle,
 	.unthrottle =		symbol_unthrottle,
 	.read_int_callback =	symbol_int_callback,