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authorJohan Hovold <jhovold@gmail.com>2012-10-17 13:34:59 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-17 13:47:59 -0700
commit53636555b9190f88320d9d46cf142f8797895456 (patch)
tree0d05343615f6d8346f184cc3ec41a9fd93d5ba28 /drivers
parent99a6f73c495c420df826e5b267fb073fd6766fc3 (diff)
downloadlinux-53636555b9190f88320d9d46cf142f8797895456.tar.bz2
USB: iuu_phoenix: 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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/serial/iuu_phoenix.c62
1 files changed, 22 insertions, 40 deletions
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 01da3ea36e89..959f71e31dca 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -72,63 +72,45 @@ struct iuu_private {
u32 clk;
};
-
-static void iuu_free_buf(struct iuu_private *priv)
-{
- kfree(priv->buf);
- kfree(priv->writebuf);
-}
-
-static int iuu_alloc_buf(struct usb_serial *serial, struct iuu_private *priv)
-{
- priv->buf = kzalloc(256, GFP_KERNEL);
- priv->writebuf = kzalloc(256, GFP_KERNEL);
- if (!priv->buf || !priv->writebuf) {
- iuu_free_buf(priv);
- dev_dbg(&serial->dev->dev, "%s problem allocation buffer\n", __func__);
- return -ENOMEM;
- }
- dev_dbg(&serial->dev->dev, "%s - Privates buffers allocation success\n", __func__);
- return 0;
-}
-
-static int iuu_startup(struct usb_serial *serial)
+static int iuu_port_probe(struct usb_serial_port *port)
{
struct iuu_private *priv;
priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
- dev_dbg(&serial->dev->dev, "%s- priv allocation success\n", __func__);
if (!priv)
return -ENOMEM;
- if (iuu_alloc_buf(serial, priv)) {
+
+ priv->buf = kzalloc(256, GFP_KERNEL);
+ if (!priv->buf) {
kfree(priv);
return -ENOMEM;
}
+
+ priv->writebuf = kzalloc(256, GFP_KERNEL);
+ if (!priv->writebuf) {
+ kfree(priv->buf);
+ kfree(priv);
+ return -ENOMEM;
+ }
+
priv->vcc = vcc_default;
spin_lock_init(&priv->lock);
init_waitqueue_head(&priv->delta_msr_wait);
- usb_set_serial_port_data(serial->port[0], priv);
+
+ usb_set_serial_port_data(port, priv);
+
return 0;
}
-/* Release function */
-static void iuu_release(struct usb_serial *serial)
+static int iuu_port_remove(struct usb_serial_port *port)
{
- struct usb_serial_port *port = serial->port[0];
struct iuu_private *priv = usb_get_serial_port_data(port);
- if (!port)
- return;
-
- if (priv) {
- iuu_free_buf(priv);
- dev_dbg(&port->dev, "%s - I will free all\n", __func__);
- usb_set_serial_port_data(port, NULL);
- dev_dbg(&port->dev, "%s - priv is not anymore in port structure\n", __func__);
- kfree(priv);
+ kfree(priv->writebuf);
+ kfree(priv->buf);
+ kfree(priv);
- dev_dbg(&port->dev, "%s priv is now kfree\n", __func__);
- }
+ return 0;
}
static int iuu_tiocmset(struct tty_struct *tty,
@@ -1225,8 +1207,8 @@ static struct usb_serial_driver iuu_device = {
.tiocmset = iuu_tiocmset,
.set_termios = iuu_set_termios,
.init_termios = iuu_init_termios,
- .attach = iuu_startup,
- .release = iuu_release,
+ .port_probe = iuu_port_probe,
+ .port_remove = iuu_port_remove,
};
static struct usb_serial_driver * const serial_drivers[] = {