Make sure port private data is deallocated on errors in attach.

Cc: <sta...@vger.kernel.org>
Signed-off-by: Johan Hovold <jhov...@gmail.com>
---
 drivers/usb/serial/sierra.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 76ef95b..2cb27e4 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -905,7 +905,7 @@ static int sierra_startup(struct usb_serial *serial)
                        dev_dbg(&port->dev, "%s: kmalloc for "
                                "sierra_port_private (%d) failed!\n",
                                __func__, i);
-                       return -ENOMEM;
+                       goto err;
                }
                spin_lock_init(&portdata->lock);
                init_usb_anchor(&portdata->active);
@@ -942,6 +942,13 @@ static int sierra_startup(struct usb_serial *serial)
        }
 
        return 0;
+err:
+       for (--i; i >= 0; --i) {
+               portdata = usb_get_serial_port_data(serial->port[i]);
+               kfree(portdata);
+       }
+
+       return -ENOMEM;
 }
 
 static void sierra_release(struct usb_serial *serial)
-- 
1.7.12.4

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