When BarIndex equals to 0xFF, default value 0 is used as the BAR index. Though PCI_BAR_ALL and MAX_UINT8 shares the same value, using PCI_BAR_ALL is like to match any BAR not BAR 0, it's more proper to use MAX_UINT8 here. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com>