3 files changed, 18 insertions, 18 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
index 4218a265a0..bb0c8e9469 100644
--- a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
+++ b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
@@ -1,7 +1,7 @@
 /** @file
   Implementation of synchronization functions.
 
-  Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -104,7 +104,11 @@ AcquireSpinLock (
   INT64   Cycle;
   INT64   Delta;
 
-  if (PcdGet32 (PcdSpinLockTimeout) > 0) {
+  if (PcdGet32 (PcdSpinLockTimeout) == 0) {
+    while (!AcquireSpinLockOrFail (SpinLock)) {
+      CpuPause ();
+    }
+  } else if (!AcquireSpinLockOrFail (SpinLock)) {
     //
     // Get the current timer value
     //
@@ -148,10 +152,6 @@ AcquireSpinLock (
       Total += Delta;
       ASSERT (Total < Timeout);
     }
-  } else {
-    while (!AcquireSpinLockOrFail (SpinLock)) {
-      CpuPause ();
-    }
   }
   return SpinLock;
 }
diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
index 587f5a771c..31f28ec2c5 100644
--- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
+++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
@@ -1,7 +1,7 @@
 /** @file
   Implementation of synchronization functions.
 
-  Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
   Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -114,7 +114,11 @@ AcquireSpinLock (
   INT64   Cycle;
   INT64   Delta;
 
-  if (PcdGet32 (PcdSpinLockTimeout) > 0) {
+  if (PcdGet32 (PcdSpinLockTimeout) == 0) {
+    while (!AcquireSpinLockOrFail (SpinLock)) {
+      CpuPause ();
+    }
+  } else if (!AcquireSpinLockOrFail (SpinLock)) {
     //
     // Get the current timer value
     //
@@ -158,10 +162,6 @@ AcquireSpinLock (
       Total += Delta;
       ASSERT (Total < Timeout);
     }
-  } else {
-    while (!AcquireSpinLockOrFail (SpinLock)) {
-      CpuPause ();
-    }
   }
   return SpinLock;
 }
diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
index ca21f5dcce..821c798121 100644
--- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
+++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
@@ -1,7 +1,7 @@
 /** @file
   Implementation of synchronization functions.
 
-  Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -116,7 +116,11 @@ AcquireSpinLock (
   INT64   Cycle;
   INT64   Delta;
 
-  if (PcdGet32 (PcdSpinLockTimeout) > 0) {
+  if (PcdGet32 (PcdSpinLockTimeout) == 0) {
+    while (!AcquireSpinLockOrFail (SpinLock)) {
+      CpuPause ();
+    }
+  } else if (!AcquireSpinLockOrFail (SpinLock)) {
     //
     // Get the current timer value
     //
@@ -160,10 +164,6 @@ AcquireSpinLock (
       Total += Delta;
       ASSERT (Total < Timeout);
     }
-  } else {
-    while (!AcquireSpinLockOrFail (SpinLock)) {
-      CpuPause ();
-    }
   }
   return SpinLock;
 }