[PATCH v2] MdeModulePkg/DxeCapsuleLibFmp: Capsule on Disk file name capsule

["Bob Morgan" <bobm@nvidia.com>]

Enhance RelocateCapsuleToRam() to skip creation of the Capsule on Disk
file name capsule if PcdSupportUpdateCapsuleReset feature is not enabled.
This avoids an EFI_UNSUPPORTED return status from UpdateCapsule() when the
file name capsule is encountered and PcdSupportUpdateCapsuleReset is FALSE.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Guomin Jiang <guomin.jiang@intel.com>
Signed-off-by: Bob Morgan <bobm@nvidia.com>
---
 .../Library/DxeCapsuleLibFmp/CapsuleOnDisk.c  | 19 ++++++++++++++++---
 .../DxeCapsuleLibFmp/DxeCapsuleLib.inf        |  3 +++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/MdeModulePkg/Library/DxeCapsuleLibFmp/CapsuleOnDisk.c b/MdeModulePkg/Library/DxeCapsuleLibFmp/CapsuleOnDisk.c
index 4c32c6cdcf..e65e335585 100644
--- a/MdeModulePkg/Library/DxeCapsuleLibFmp/CapsuleOnDisk.c
+++ b/MdeModulePkg/Library/DxeCapsuleLibFmp/CapsuleOnDisk.c
@@ -1739,6 +1739,7 @@ RelocateCapsuleToRam (
   UINT8                         *StringBuf;
   UINTN                         StringSize;
   UINTN                         TotalStringSize;
+  UINTN                         CapsulesToProcess;
 
   CapsuleOnDiskBuf = NULL;
   BlockDescriptors = NULL;
@@ -1778,6 +1779,13 @@ RelocateCapsuleToRam (
     TotalStringSize += StrSize (CapsuleOnDiskBuf[Index].FileInfo->FileName);
   }
 
+  // If Persist Across Reset isn't supported, skip the file name strings capsule
+  if (!FeaturePcdGet (PcdSupportUpdateCapsuleReset)) {
+    CapsulesToProcess = CapsuleOnDiskNum;
+    goto BuildSg;
+  }
+  CapsulesToProcess = CapsuleOnDiskNum + 1;
+
   FileNameCapsule = AllocateZeroPool (sizeof (EFI_CAPSULE_HEADER) + TotalStringSize);
   if (FileNameCapsule == NULL) {
     DEBUG ((DEBUG_ERROR, "Fail to allocate memory for name capsule.\n"));
@@ -1804,18 +1812,23 @@ RelocateCapsuleToRam (
   //
   // 3. Build Gather list for the capsules
   //
-  Status = BuildGatherList (CapsuleBuffer, CapsuleSize, CapsuleOnDiskNum + 1, &BlockDescriptors);
+BuildSg:
+  Status = BuildGatherList (CapsuleBuffer, CapsuleSize, CapsulesToProcess, &BlockDescriptors);
   if (EFI_ERROR (Status) || BlockDescriptors == NULL) {
     FreePool (CapsuleBuffer);
     FreePool (CapsuleSize);
-    FreePool (FileNameCapsule);
+    if (FileNameCapsule != NULL) {
+      FreePool (FileNameCapsule);
+    }
     return EFI_OUT_OF_RESOURCES;
   }
 
   //
   // 4. Call UpdateCapsule() service
   //
-  Status = gRT->UpdateCapsule((EFI_CAPSULE_HEADER **) CapsuleBuffer, CapsuleOnDiskNum + 1, (UINTN) BlockDescriptors);
+  Status = gRT->UpdateCapsule ((EFI_CAPSULE_HEADER **) CapsuleBuffer,
+                               CapsulesToProcess,
+                               (UINTN) BlockDescriptors);
 
   return Status;
 }
diff --git a/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.inf b/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.inf
index 05de4299fb..4932479d42 100644
--- a/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.inf
+++ b/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.inf
@@ -68,6 +68,9 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdCodRelocationDevPath                     ## SOMETIMES_CONSUMES
   gEfiMdeModulePkgTokenSpaceGuid.PcdCoDRelocationFileName                    ## CONSUMES
 
+[FeaturePcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdSupportUpdateCapsuleReset ## CONSUMES
+
 [Protocols]
   gEsrtManagementProtocolGuid                   ## CONSUMES
   gEfiFirmwareManagementProtocolGuid            ## CONSUMES
-- 
2.17.1