[PATCH v1 1/1] IntelSiliconPkg/ShadowMicrocodePei: Fix return value in ShadowMicrocode.

["Aaron Li" <aaron.li@intel.com>]

ShadowMicrocode should return EFI_NOT_FOUND when no valid Microcode found
in FIT table.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3110

Signed-off-by: Aaron Li <aaron.li@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
---
 Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c
index 5c7ee6910c8e..5539a121cbb6 100644
--- a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c
+++ b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c
@@ -377,6 +377,9 @@ IsValidFitTable (
                                    with microcode patches data in it.
 
   @retval EFI_SUCCESS              The microcode has been shadowed to memory.
+  @retval EFI_INVALID_PARAMETER    BufferSize or Buffer is NULL.
+  @retval EFI_INVALID_PARAMETER    CpuIdCount not equal to 0 and MicrocodeCpuId is NULL.
+  @retval EFI_NOT_FOUND            No valid microcode found.
   @retval EFI_OUT_OF_RESOURCES     The operation fails due to lack of resources.
 
 **/
@@ -460,6 +463,9 @@ ShadowMicrocode (
       ));
 
     ShadowMicrocodePatchWorker (PatchInfoBuffer, PatchCount, TotalLoadSize, BufferSize, Buffer);
+  } else {
+    FreePool (PatchInfoBuffer);
+    return EFI_NOT_FOUND;
   }
 
   FreePool (PatchInfoBuffer);
-- 
2.29.2.windows.2