IntelSiliconPkg IntelVTdDxe: Fix incorrect code to clear VTd error

[mirror_edk2.git] / IntelSiliconPkg / Feature / VTd / IntelVTdDxe / VtdReg.c

diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c
index 8dbc83fa2d6764654209d820f4a98ab9e9c90785..e564d373c756c82f2d284121c147aa98f143fb3f 100644 (file)
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c
@@ -554,11 +554,13 @@ DumpVtdIfError (
       for (Index = 0; Index < (UINTN)CapReg.Bits.NFR + 1; Index++) {\r
         FrcdReg.Uint64[1] = MmioRead64 (mVtdUnitInformation[Num].VtdUnitBaseAddress + ((CapReg.Bits.FRO * 16) + (Index * 16) + R_FRCD_REG + sizeof(UINT64)));\r
         if (FrcdReg.Bits.F != 0) {\r
-          FrcdReg.Bits.F = 0;\r
+          //\r
+          // Software writes the value read from this field (F) to Clear it.\r
+          //\r
           MmioWrite64 (mVtdUnitInformation[Num].VtdUnitBaseAddress + ((CapReg.Bits.FRO * 16) + (Index * 16) + R_FRCD_REG + sizeof(UINT64)), FrcdReg.Uint64[1]);\r
         }\r
-        MmioWrite32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG, MmioRead32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG));\r
       }\r
+      MmioWrite32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG, MmioRead32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG));\r
     }\r
   }\r
 }\r