From feffa7ca6008ab859dd7ab7448a5a899bf0aa98f Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@gmail.com>
Date: Thu, 25 Oct 2012 10:29:06 +0200
Subject: [PATCH] USB: omninet: fix port-data memory leak
Fix port-data memory leak by replacing attach and release with
port_probe and port_remove.
Since commit 0998d0631001288 (device-core: Ensure drvdata = NULL when no
driver is bound) the port private data is no longer freed at release as
it is no longer accessible.
Compile-only tested.
Cc: <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/omninet.c | 36 ++++++++++++++++++------------------
1 file changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c
index 6def58b79382f..9ab73d2957746 100644
--- a/drivers/usb/serial/omninet.c
+++ b/drivers/usb/serial/omninet.c
@@ -44,8 +44,8 @@ static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count);
static int omninet_write_room(struct tty_struct *tty);
static void omninet_disconnect(struct usb_serial *serial);
-static void omninet_release(struct usb_serial *serial);
-static int omninet_attach(struct usb_serial *serial);
+static int omninet_port_probe(struct usb_serial_port *port);
+static int omninet_port_remove(struct usb_serial_port *port);
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(ZYXEL_VENDOR_ID, ZYXEL_OMNINET_ID) },
@@ -62,7 +62,8 @@ static struct usb_serial_driver zyxel_omninet_device = {
.description = "ZyXEL - omni.net lcd plus usb",
.id_table = id_table,
.num_ports = 1,
- .attach = omninet_attach,
+ .port_probe = omninet_port_probe,
+ .port_remove = omninet_port_remove,
.open = omninet_open,
.close = omninet_close,
.write = omninet_write,
@@ -70,7 +71,6 @@ static struct usb_serial_driver zyxel_omninet_device = {
.read_bulk_callback = omninet_read_bulk_callback,
.write_bulk_callback = omninet_write_bulk_callback,
.disconnect = omninet_disconnect,
- .release = omninet_release,
};
static struct usb_serial_driver * const serial_drivers[] = {
@@ -112,18 +112,26 @@ struct omninet_data {
__u8 od_outseq; /* Sequence number for bulk_out URBs */
};
-static int omninet_attach(struct usb_serial *serial)
+static int omninet_port_probe(struct usb_serial_port *port)
{
struct omninet_data *od;
- struct usb_serial_port *port = serial->port[0];
od = kmalloc(sizeof(struct omninet_data), GFP_KERNEL);
- if (!od) {
- dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n",
- __func__, sizeof(struct omninet_data));
+ if (!od)
return -ENOMEM;
- }
+
usb_set_serial_port_data(port, od);
+
+ return 0;
+}
+
+static int omninet_port_remove(struct usb_serial_port *port)
+{
+ struct omninet_data *od;
+
+ od = usb_get_serial_port_data(port);
+ kfree(od);
+
return 0;
}
@@ -279,14 +287,6 @@ static void omninet_disconnect(struct usb_serial *serial)
usb_kill_urb(wport->write_urb);
}
-
-static void omninet_release(struct usb_serial *serial)
-{
- struct usb_serial_port *port = serial->port[0];
-
- kfree(usb_get_serial_port_data(port));
-}
-
module_usb_serial_driver(serial_drivers, id_table);
MODULE_AUTHOR(DRIVER_AUTHOR);