diff --git a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c
index b331c0f3e3..b8651ff998 100644
--- a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c
+++ b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c
@@ -1,6 +1,6 @@
 /** @file
 
-  Copyright (c) 2014 - 2019, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2014 - 2021, Intel Corporation. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -1037,9 +1037,9 @@ InitializeUfsBlockIoPeim (
   UFS_PEIM_HC_PRIVATE_DATA       *Private;
   EDKII_UFS_HOST_CONTROLLER_PPI  *UfsHcPpi;
   UINT32                         Index;
-  UFS_CONFIG_DESC                Config;
   UINTN                          MmioBase;
   UINT8                          Controller;
+  UFS_UNIT_DESC                  UnitDescriptor;
 
   //
   // Shadow this PEIM to run from memory
@@ -1126,19 +1126,18 @@ InitializeUfsBlockIoPeim (
     }
 
     //
-    // Get Ufs Device's Lun Info by reading Configuration Descriptor.
+    // Check if 8 common luns are active and set corresponding bit mask.
     //
-    Status = UfsRwDeviceDesc (Private, TRUE, UfsConfigDesc, 0, 0, &Config, sizeof (UFS_CONFIG_DESC));
-    if (EFI_ERROR (Status)) {
-      DEBUG ((DEBUG_ERROR, "Ufs Get Configuration Descriptor Error, Status = %r\n", Status));
-      Controller++;
-      continue;
-    }
-
     for (Index = 0; Index < UFS_PEIM_MAX_LUNS; Index++) {
-      if (Config.UnitDescConfParams[Index].LunEn != 0) {
-        Private->Luns.BitMask |= (BIT0 << Index);
+      Status = UfsRwDeviceDesc (Private, TRUE, UfsUnitDesc, (UINT8)Index, 0, &UnitDescriptor, sizeof (UFS_UNIT_DESC));
+      if (EFI_ERROR (Status)) {
+        DEBUG ((DEBUG_ERROR, "Fail to read UFS Unit Descriptor, Index = %X, Status = %r\n", Index, Status));
+        continue;
+      }
+
+      if (UnitDescriptor.LunEn == 0x1) {
         DEBUG ((DEBUG_INFO, "Ufs %d Lun %d is enabled\n", Controller, Index));
+        Private->Luns.BitMask |= (BIT0 << Index);
       }
     }