offset_w might be updated after growing the FIFO Fix ticket #9630 Tested-by: U. Artie Eoff <ullysses.a.eoff@intel.com> Reviewed-by: mkver Reviewed-by: U. Artie Eoff <ullysses.a.eoff@intel.com> Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>