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-rw-r--r--UefiCpuPkg/Library/MtrrLib/MtrrLib.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
index f5b3460f13..199e165d46 100644
--- a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
+++ b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
@@ -1489,7 +1489,9 @@ MtrrSetMemoryAttributeWorker (
UINT64 NewValue;
MTRR_VARIABLE_SETTINGS *VariableSettings;
- MtrrContextValid = FALSE;
+ MtrrContextValid = FALSE;
+ VariableMtrrCount = 0;
+ ZeroMem (&WorkingFixedSettings, sizeof (WorkingFixedSettings));
for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
FixedSettingsValid[Index] = FALSE;
FixedSettingsModified[Index] = FALSE;