3.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <jhov...@gmail.com>
commit 961be09e1ead58509ed4bed0d5819a15d8613d8d upstream.
Move interface data allocation to attach so that it is deallocated
should usb-serial probe fail.
Signed-off-by: Johan Hovold <jhov...@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/usb/serial/qcserial.c | 31 ++++++++++++++++---------------
1 file changed, 16 insertions(+), 15 deletions(-)
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -140,7 +140,6 @@ MODULE_DEVICE_TABLE(usb, id_table);
static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
{
- struct usb_wwan_intf_private *data;
struct usb_host_interface *intf = serial->interface->cur_altsetting;
struct device *dev = &serial->dev->dev;
int retval = -ENODEV;
@@ -156,13 +155,6 @@ static int qcprobe(struct usb_serial *se
ifnum = intf->desc.bInterfaceNumber;
dev_dbg(dev, "This Interface = %d\n", ifnum);
- data = kzalloc(sizeof(struct usb_wwan_intf_private),
- GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- spin_lock_init(&data->susp_lock);
-
if (nintf == 1) {
/* QDL mode */
/* Gobi 2000 has a single altsetting, older ones have two */
@@ -255,20 +247,28 @@ done:
}
}
- /* Set serial->private if not returning error */
- if (retval == 0)
- usb_set_serial_data(serial, data);
- else
- kfree(data);
-
return retval;
}
+static int qc_attach(struct usb_serial *serial)
+{
+ struct usb_wwan_intf_private *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ spin_lock_init(&data->susp_lock);
+
+ usb_set_serial_data(serial, data);
+
+ return 0;
+}
+
static void qc_release(struct usb_serial *serial)
{
struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
- /* Free the private data allocated in qcprobe */
usb_set_serial_data(serial, NULL);
kfree(priv);
}
@@ -287,6 +287,7 @@ static struct usb_serial_driver qcdevice
.write = usb_wwan_write,
.write_room = usb_wwan_write_room,
.chars_in_buffer = usb_wwan_chars_in_buffer,
+ .attach = qc_attach,
.release = qc_release,
.port_probe = usb_wwan_port_probe,
.port_remove = usb_wwan_port_remove,
--
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