X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=PcAtChipsetPkg%2FHpetTimerDxe%2FHpetTimer.c;h=c62c3a9b2b98d23dd6f30f1bf291201af85fa2f2;hp=0ed874357b161c704c1025b6a0844d3f465325fe;hb=70830df6dc72b4fea5e5e9eef07f0039a8a77afe;hpb=a6f5a5b51f0f4e6915f1ac2b799574fd4591c440

diff --git a/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c b/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c
index 0ed874357b..c62c3a9b2b 100644
--- a/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c
+++ b/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c
@@ -492,11 +492,17 @@ TimerDriverSetTimerPeriod (
   IN UINT64                   TimerPeriod
   )
 {
+  EFI_TPL                        Tpl;
   UINT64                         MainCounter;
   UINT64                         Delta;
   UINT64                         CurrentComparator;
   HPET_TIMER_MSI_ROUTE_REGISTER  HpetTimerMsiRoute;
-  
+
+  //
+  // Disable interrupts
+  //
+  Tpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+
   //
   // Disable HPET timer when adjusting the timer period
   //
@@ -616,7 +622,12 @@ TimerDriverSetTimerPeriod (
   // is disabled.
   //
   HpetEnable (TRUE);
-  
+
+  //
+  // Restore interrupts
+  //
+  gBS->RestoreTPL (Tpl);
+
   return EFI_SUCCESS;
 }