diff options
author | Johan Hovold <jhovold@gmail.com> | 2012-10-17 11:34:58 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-17 20:47:58 (GMT) |
commit | 003615302a16579531932576bcd9582ddeba9018 (patch) | |
tree | e0f5b3077907da583663d0228d03e89b0280ff5e /drivers/usb | |
parent | 94ab71ce288921490ca857e25ad174e1921b1e29 (diff) | |
download | linux-fsl-qoriq-003615302a16579531932576bcd9582ddeba9018.tar.xz |
USB: io_ti: fix port-data memory leak
Fix port-data memory leak by moving port data allocation and
deallocation to 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/usb')
-rw-r--r-- | drivers/usb/serial/io_ti.c | 91 |
1 files changed, 45 insertions, 46 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index a2209cd..9ae65d6 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -2532,12 +2532,7 @@ static void edge_break(struct tty_struct *tty, int break_state) static int edge_startup(struct usb_serial *serial) { struct edgeport_serial *edge_serial; - struct edgeport_port *edge_port; - struct usb_device *dev; int status; - int i; - - dev = serial->dev; /* create our private serial structure */ edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); @@ -2555,40 +2550,7 @@ static int edge_startup(struct usb_serial *serial) return status; } - /* set up our port private structures */ - for (i = 0; i < serial->num_ports; ++i) { - edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL); - if (edge_port == NULL) { - dev_err(&serial->dev->dev, "%s - Out of memory\n", - __func__); - goto cleanup; - } - spin_lock_init(&edge_port->ep_lock); - if (kfifo_alloc(&edge_port->write_fifo, EDGE_OUT_BUF_SIZE, - GFP_KERNEL)) { - dev_err(&serial->dev->dev, "%s - Out of memory\n", - __func__); - kfree(edge_port); - goto cleanup; - } - edge_port->port = serial->port[i]; - edge_port->edge_serial = edge_serial; - usb_set_serial_port_data(serial->port[i], edge_port); - edge_port->bUartMode = default_uart_mode; - } - return 0; - -cleanup: - for (--i; i >= 0; --i) { - edge_port = usb_get_serial_port_data(serial->port[i]); - kfifo_free(&edge_port->write_fifo); - kfree(edge_port); - usb_set_serial_port_data(serial->port[i], NULL); - } - kfree(edge_serial); - usb_set_serial_data(serial, NULL); - return -ENOMEM; } static void edge_disconnect(struct usb_serial *serial) @@ -2597,17 +2559,54 @@ static void edge_disconnect(struct usb_serial *serial) static void edge_release(struct usb_serial *serial) { - int i; + kfree(usb_get_serial_data(serial)); +} + +static int edge_port_probe(struct usb_serial_port *port) +{ struct edgeport_port *edge_port; + int ret; - for (i = 0; i < serial->num_ports; ++i) { - edge_port = usb_get_serial_port_data(serial->port[i]); + edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); + if (!edge_port) + return -ENOMEM; + + ret = kfifo_alloc(&edge_port->write_fifo, EDGE_OUT_BUF_SIZE, + GFP_KERNEL); + if (ret) { + kfree(edge_port); + return -ENOMEM; + } + + ret = edge_create_sysfs_attrs(port); + if (ret) { kfifo_free(&edge_port->write_fifo); kfree(edge_port); + return ret; } - kfree(usb_get_serial_data(serial)); + + spin_lock_init(&edge_port->ep_lock); + edge_port->port = port; + edge_port->edge_serial = usb_get_serial_data(port->serial); + edge_port->bUartMode = default_uart_mode; + + usb_set_serial_port_data(port, edge_port); + + return 0; } +static int edge_port_remove(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port; + + edge_port = usb_get_serial_port_data(port); + + edge_remove_sysfs_attrs(port); + kfifo_free(&edge_port->write_fifo); + kfree(edge_port); + + return 0; +} /* Sysfs Attributes */ @@ -2667,8 +2666,8 @@ static struct usb_serial_driver edgeport_1port_device = { .attach = edge_startup, .disconnect = edge_disconnect, .release = edge_release, - .port_probe = edge_create_sysfs_attrs, - .port_remove = edge_remove_sysfs_attrs, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, .ioctl = edge_ioctl, .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, @@ -2698,8 +2697,8 @@ static struct usb_serial_driver edgeport_2port_device = { .attach = edge_startup, .disconnect = edge_disconnect, .release = edge_release, - .port_probe = edge_create_sysfs_attrs, - .port_remove = edge_remove_sysfs_attrs, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, .ioctl = edge_ioctl, .set_termios = edge_set_termios, .tiocmget = edge_tiocmget, |