There is a possibility that lock will be left acquired.
Consolidate error path under out_free_unlock label.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Reviewed-by: NBenjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>