X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=UefiCpuPkg%2FCpuIo2Dxe%2FCpuIo2Dxe.c;fp=UefiCpuPkg%2FCpuIo2Dxe%2FCpuIo2Dxe.c;h=802342caaebd1396f17cdd6144a90e1c67d8571c;hp=fd4b2e8524d0db8dcb9cb80e6c9710888f7a9cbd;hb=36de860619c2c3e8bc9f974d1296eb81411049f1;hpb=209e6e3174d5889640c2e906f343799fd067cd55

diff --git a/UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.c b/UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.c
index fd4b2e8524..802342caae 100644
--- a/UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.c
+++ b/UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.c
@@ -1,7 +1,7 @@
 /** @file
   Produces the CPU I/O 2 Protocol.
 
-Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2009 - 2011, 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        
@@ -175,8 +175,9 @@ CpuIoCheckParameter (
 
   //
   // Check to see if Buffer is aligned
+  // (IA-32 allows UINT64 and INT64 data types to be 32-bit aligned.)
   //
-  if (((UINTN)Buffer & (mInStride[Width] - 1)) != 0) {
+  if (((UINTN)Buffer & ((MIN (sizeof (UINTN), mInStride[Width])  - 1))) != 0) {
     return EFI_UNSUPPORTED;
   }