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 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
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@ -44,8 +44,8 @@ static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
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const unsigned char *buf, int count);
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static int omninet_write_room(struct tty_struct *tty);
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static void omninet_disconnect(struct usb_serial *serial);
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static void omninet_release(struct usb_serial *serial);
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static int omninet_attach(struct usb_serial *serial);
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static int omninet_port_probe(struct usb_serial_port *port);
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static int omninet_port_remove(struct usb_serial_port *port);
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(ZYXEL_VENDOR_ID, ZYXEL_OMNINET_ID) },
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@ -62,7 +62,8 @@ static struct usb_serial_driver zyxel_omninet_device = {
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.description = "ZyXEL - omni.net lcd plus usb",
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.id_table = id_table,
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.num_ports = 1,
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.attach = omninet_attach,
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.port_probe = omninet_port_probe,
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.port_remove = omninet_port_remove,
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.open = omninet_open,
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.close = omninet_close,
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.write = omninet_write,
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@ -70,7 +71,6 @@ static struct usb_serial_driver zyxel_omninet_device = {
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.read_bulk_callback = omninet_read_bulk_callback,
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.write_bulk_callback = omninet_write_bulk_callback,
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.disconnect = omninet_disconnect,
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.release = omninet_release,
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};
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static struct usb_serial_driver * const serial_drivers[] = {
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@ -112,18 +112,26 @@ struct omninet_data {
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__u8 od_outseq; /* Sequence number for bulk_out URBs */
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};
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static int omninet_attach(struct usb_serial *serial)
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static int omninet_port_probe(struct usb_serial_port *port)
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{
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struct omninet_data *od;
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struct usb_serial_port *port = serial->port[0];
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od = kmalloc(sizeof(struct omninet_data), GFP_KERNEL);
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if (!od) {
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dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n",
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__func__, sizeof(struct omninet_data));
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if (!od)
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return -ENOMEM;
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}
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usb_set_serial_port_data(port, od);
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return 0;
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}
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static int omninet_port_remove(struct usb_serial_port *port)
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{
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struct omninet_data *od;
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od = usb_get_serial_port_data(port);
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kfree(od);
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return 0;
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}
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@ -279,14 +287,6 @@ static void omninet_disconnect(struct usb_serial *serial)
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usb_kill_urb(wport->write_urb);
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}
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static void omninet_release(struct usb_serial *serial)
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{
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struct usb_serial_port *port = serial->port[0];
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kfree(usb_get_serial_port_data(port));
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}
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module_usb_serial_driver(serial_drivers, id_table);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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