USB: sierra: 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 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.
Note also that urb-count for multi-port interfaces has not been changed
even though the usb-serial port number is now determined from the port
and interface minor numbers.
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:
Johan Hovold
Greg Kroah-Hartman
parent
084817d793
commit
f525c05bab
|
|
@ -878,12 +878,7 @@ static void sierra_dtr_rts(struct usb_serial_port *port, int on)
|
|||
|
||||
static int sierra_startup(struct usb_serial *serial)
|
||||
{
|
||||
struct usb_serial_port *port;
|
||||
struct sierra_intf_private *intfdata;
|
||||
struct sierra_port_private *portdata;
|
||||
struct sierra_iface_info *himemoryp = NULL;
|
||||
int i;
|
||||
u8 ifnum;
|
||||
|
||||
intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
|
||||
if (!intfdata)
|
||||
|
|
@ -900,77 +895,71 @@ static int sierra_startup(struct usb_serial *serial)
|
|||
if (nmea)
|
||||
sierra_vsc_set_nmea(serial->dev, 1);
|
||||
|
||||
/* Now setup per port private data */
|
||||
for (i = 0; i < serial->num_ports; i++) {
|
||||
port = serial->port[i];
|
||||
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
|
||||
if (!portdata) {
|
||||
dev_dbg(&port->dev, "%s: kmalloc for "
|
||||
"sierra_port_private (%d) failed!\n",
|
||||
__func__, i);
|
||||
goto err;
|
||||
}
|
||||
spin_lock_init(&portdata->lock);
|
||||
init_usb_anchor(&portdata->active);
|
||||
init_usb_anchor(&portdata->delayed);
|
||||
ifnum = i;
|
||||
/* Assume low memory requirements */
|
||||
portdata->num_out_urbs = N_OUT_URB;
|
||||
portdata->num_in_urbs = N_IN_URB;
|
||||
|
||||
/* Determine actual memory requirements */
|
||||
if (serial->num_ports == 1) {
|
||||
/* Get interface number for composite device */
|
||||
ifnum = sierra_calc_interface(serial);
|
||||
himemoryp =
|
||||
(struct sierra_iface_info *)&typeB_interface_list;
|
||||
if (is_himemory(ifnum, himemoryp)) {
|
||||
portdata->num_out_urbs = N_OUT_URB_HM;
|
||||
portdata->num_in_urbs = N_IN_URB_HM;
|
||||
}
|
||||
}
|
||||
else {
|
||||
himemoryp =
|
||||
(struct sierra_iface_info *)&typeA_interface_list;
|
||||
if (is_himemory(i, himemoryp)) {
|
||||
portdata->num_out_urbs = N_OUT_URB_HM;
|
||||
portdata->num_in_urbs = N_IN_URB_HM;
|
||||
}
|
||||
}
|
||||
dev_dbg(&serial->dev->dev,
|
||||
"Memory usage (urbs) interface #%d, in=%d, out=%d\n",
|
||||
ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
|
||||
/* Set the port private data pointer */
|
||||
usb_set_serial_port_data(port, portdata);
|
||||
}
|
||||
|
||||
return 0;
|
||||
err:
|
||||
for (--i; i >= 0; --i) {
|
||||
portdata = usb_get_serial_port_data(serial->port[i]);
|
||||
kfree(portdata);
|
||||
}
|
||||
kfree(intfdata);
|
||||
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
static void sierra_release(struct usb_serial *serial)
|
||||
{
|
||||
int i;
|
||||
struct usb_serial_port *port;
|
||||
struct sierra_intf_private *intfdata;
|
||||
|
||||
intfdata = usb_get_serial_data(serial);
|
||||
kfree(intfdata);
|
||||
}
|
||||
|
||||
static int sierra_port_probe(struct usb_serial_port *port)
|
||||
{
|
||||
struct usb_serial *serial = port->serial;
|
||||
struct sierra_port_private *portdata;
|
||||
const struct sierra_iface_info *himemoryp;
|
||||
u8 ifnum;
|
||||
|
||||
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
|
||||
if (!portdata)
|
||||
return -ENOMEM;
|
||||
|
||||
spin_lock_init(&portdata->lock);
|
||||
init_usb_anchor(&portdata->active);
|
||||
init_usb_anchor(&portdata->delayed);
|
||||
|
||||
/* Assume low memory requirements */
|
||||
portdata->num_out_urbs = N_OUT_URB;
|
||||
portdata->num_in_urbs = N_IN_URB;
|
||||
|
||||
/* Determine actual memory requirements */
|
||||
if (serial->num_ports == 1) {
|
||||
/* Get interface number for composite device */
|
||||
ifnum = sierra_calc_interface(serial);
|
||||
himemoryp = &typeB_interface_list;
|
||||
} else {
|
||||
/* This is really the usb-serial port number of the interface
|
||||
* rather than the interface number.
|
||||
*/
|
||||
ifnum = port->number - serial->minor;
|
||||
himemoryp = &typeA_interface_list;
|
||||
}
|
||||
|
||||
if (is_himemory(ifnum, himemoryp)) {
|
||||
portdata->num_out_urbs = N_OUT_URB_HM;
|
||||
portdata->num_in_urbs = N_IN_URB_HM;
|
||||
}
|
||||
|
||||
dev_dbg(&port->dev,
|
||||
"Memory usage (urbs) interface #%d, in=%d, out=%d\n",
|
||||
ifnum, portdata->num_in_urbs, portdata->num_out_urbs);
|
||||
|
||||
usb_set_serial_port_data(port, portdata);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sierra_port_remove(struct usb_serial_port *port)
|
||||
{
|
||||
struct sierra_port_private *portdata;
|
||||
|
||||
for (i = 0; i < serial->num_ports; ++i) {
|
||||
port = serial->port[i];
|
||||
if (!port)
|
||||
continue;
|
||||
portdata = usb_get_serial_port_data(port);
|
||||
if (!portdata)
|
||||
continue;
|
||||
kfree(portdata);
|
||||
}
|
||||
kfree(serial->private);
|
||||
portdata = usb_get_serial_port_data(port);
|
||||
kfree(portdata);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
|
|
@ -1074,6 +1063,8 @@ static struct usb_serial_driver sierra_device = {
|
|||
.tiocmset = sierra_tiocmset,
|
||||
.attach = sierra_startup,
|
||||
.release = sierra_release,
|
||||
.port_probe = sierra_port_probe,
|
||||
.port_remove = sierra_port_remove,
|
||||
.suspend = sierra_suspend,
|
||||
.resume = sierra_resume,
|
||||
.read_int_callback = sierra_instat_callback,
|
||||
|
|
|
|||
Loading…
Reference in New Issue