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USB: oti6858: fix port-data memory leak
Fix port-data memory leak by replacing attach and release with
port_probe and port_remove.
Since commit 0998d06310
(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>
This commit is contained in:
parent
53636555b9
commit
289b076f89
@ -137,8 +137,8 @@ static int oti6858_chars_in_buffer(struct tty_struct *tty);
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static int oti6858_tiocmget(struct tty_struct *tty);
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static int oti6858_tiocmset(struct tty_struct *tty,
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unsigned int set, unsigned int clear);
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static int oti6858_startup(struct usb_serial *serial);
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static void oti6858_release(struct usb_serial *serial);
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static int oti6858_port_probe(struct usb_serial_port *port);
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static int oti6858_port_remove(struct usb_serial_port *port);
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/* device info */
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static struct usb_serial_driver oti6858_device = {
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@ -161,8 +161,8 @@ static struct usb_serial_driver oti6858_device = {
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.write_bulk_callback = oti6858_write_bulk_callback,
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.write_room = oti6858_write_room,
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.chars_in_buffer = oti6858_chars_in_buffer,
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.attach = oti6858_startup,
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.release = oti6858_release,
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.port_probe = oti6858_port_probe,
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.port_remove = oti6858_port_remove,
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};
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static struct usb_serial_driver * const serial_drivers[] = {
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@ -331,36 +331,33 @@ static void send_data(struct work_struct *work)
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usb_serial_port_softint(port);
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}
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static int oti6858_startup(struct usb_serial *serial)
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static int oti6858_port_probe(struct usb_serial_port *port)
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{
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struct usb_serial_port *port = serial->port[0];
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struct oti6858_private *priv;
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int i;
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for (i = 0; i < serial->num_ports; ++i) {
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priv = kzalloc(sizeof(struct oti6858_private), GFP_KERNEL);
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if (!priv)
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break;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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spin_lock_init(&priv->lock);
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init_waitqueue_head(&priv->intr_wait);
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/* INIT_WORK(&priv->setup_work, setup_line, serial->port[i]); */
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/* INIT_WORK(&priv->write_work, send_data, serial->port[i]); */
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priv->port = port;
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INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line);
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INIT_DELAYED_WORK(&priv->delayed_write_work, send_data);
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spin_lock_init(&priv->lock);
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init_waitqueue_head(&priv->intr_wait);
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priv->port = port;
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INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line);
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INIT_DELAYED_WORK(&priv->delayed_write_work, send_data);
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usb_set_serial_port_data(serial->port[i], priv);
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}
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if (i == serial->num_ports)
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return 0;
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usb_set_serial_port_data(port, priv);
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for (--i; i >= 0; --i) {
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priv = usb_get_serial_port_data(serial->port[i]);
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kfree(priv);
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usb_set_serial_port_data(serial->port[i], NULL);
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}
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return -ENOMEM;
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return 0;
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}
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static int oti6858_port_remove(struct usb_serial_port *port)
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{
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struct oti6858_private *priv;
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priv = usb_get_serial_port_data(port);
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kfree(priv);
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return 0;
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}
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static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port,
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@ -709,15 +706,6 @@ static int oti6858_ioctl(struct tty_struct *tty,
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return -ENOIOCTLCMD;
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}
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static void oti6858_release(struct usb_serial *serial)
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{
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int i;
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for (i = 0; i < serial->num_ports; ++i)
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kfree(usb_get_serial_port_data(serial->port[i]));
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}
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static void oti6858_read_int_callback(struct urb *urb)
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{
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struct usb_serial_port *port = urb->context;
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