X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=PcAtChipsetPkg%2F8259InterruptControllerDxe%2F8259.c;h=7d8265dbd1da59885114e7e5cad49e5ede5f6bdf;hp=447106afe92ce60eff749a6e5296ec0c7b6c6fee;hb=e78aab9d2f1423f2ec4a82e0e36eff4dfd7c56ea;hpb=3d78c020d22023d35d27b48817d73ff31a361ac7

diff --git a/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c b/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c
index 447106afe9..7d8265dbd1 100644
--- a/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c
+++ b/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c
@@ -123,8 +123,10 @@ Interrupt8259SetVectorBase (
   IN UINT8                     SlaveBase
   )
 {
-  UINT8 Mask;
+  UINT8   Mask;
+  EFI_TPL OriginalTpl;
 
+  OriginalTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
   //
   // Set vector base for slave PIC
   //
@@ -137,7 +139,7 @@ Interrupt8259SetVectorBase (
 
     //
     // Preserve interrtup mask register before initialization sequence
-    // because it will be cleared during intialization
+    // because it will be cleared during initialization
     //
     Mask = IoRead8 (LEGACY_8259_MASK_REGISTER_SLAVE);
 
@@ -179,7 +181,7 @@ Interrupt8259SetVectorBase (
 
     //
     // Preserve interrtup mask register before initialization sequence
-    // because it will be cleared during intialization
+    // because it will be cleared during initialization
     //
     Mask = IoRead8 (LEGACY_8259_MASK_REGISTER_MASTER);
 
@@ -211,6 +213,8 @@ Interrupt8259SetVectorBase (
 
   IoWrite8 (LEGACY_8259_CONTROL_REGISTER_SLAVE, LEGACY_8259_EOI);
   IoWrite8 (LEGACY_8259_CONTROL_REGISTER_MASTER, LEGACY_8259_EOI);
+  
+  gBS->RestoreTPL (OriginalTpl);
 
   return EFI_SUCCESS;
 }