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@xxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
---
drivers/usb/serial/ssu100.c | 34 ++++++++++++++++++++--------------
1 file changed, 20 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 015810b..868d1e6 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -67,13 +67,6 @@ struct ssu100_port_private {
struct async_icount icount;
};
-static void ssu100_release(struct usb_serial *serial)
-{
- struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port);
-
- kfree(priv);
-}
-
static inline int ssu100_control_msg(struct usb_device *dev,
u8 request, u16 data, u16 index)
{
@@ -442,21 +435,33 @@ static int ssu100_ioctl(struct tty_struct *tty,
static int ssu100_attach(struct usb_serial *serial)
{
+ return ssu100_initdevice(serial->dev);
+}
+
+static int ssu100_port_probe(struct usb_serial_port *port)
+{
struct ssu100_port_private *priv;
- struct usb_serial_port *port = *serial->port;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__,
- sizeof(*priv));
+ if (!priv)
return -ENOMEM;
- }
spin_lock_init(&priv->status_lock);
init_waitqueue_head(&priv->delta_msr_wait);
+
usb_set_serial_port_data(port, priv);
- return ssu100_initdevice(serial->dev);
+ return 0;
+}
+
+static int ssu100_port_remove(struct usb_serial_port *port)
+{
+ struct ssu100_port_private *priv;
+
+ priv = usb_get_serial_port_data(port);
+ kfree(priv);
+
+ return 0;
}
static int ssu100_tiocmget(struct tty_struct *tty)
@@ -647,7 +652,8 @@ static struct usb_serial_driver ssu100_device = {
.open = ssu100_open,
.close = ssu100_close,
.attach = ssu100_attach,
- .release = ssu100_release,
+ .port_probe = ssu100_port_probe,
+ .port_remove = ssu100_port_remove,
.dtr_rts = ssu100_dtr_rts,
.process_read_urb = ssu100_process_read_urb,
.tiocmget = ssu100_tiocmget,
--
1.7.12.3
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