USB: serial: garmin_gps: fix memory leak on probe errors

BugLink: http://bugs.launchpad.net/bugs/1744639

commit 74d471b5 upstream.

Make sure to free the port private data before returning after a failed
probe attempt.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

drivers/usb/serial/garmin_gps.c

@@ -1414,6 +1414,12 @@ static int garmin_port_probe(struct usb_serial_port *port)
 	usb_set_serial_port_data(port, garmin_data_p);
 
 	status = garmin_init_session(port);
+	if (status)
+		goto err_free;
+
+	return 0;
+err_free:
+	kfree(garmin_data_p);
 
 	return status;
 }