MdeModulePkg DxeCore: Check Start consistently in CoreConvertPagesEx

Current check:
ASSERT (NumberOfPages);
ASSERT ((Start & EFI_PAGE_MASK) == 0);
ASSERT (End > Start) ;

if (NumberOfPages == 0 ||
    ((Start & EFI_PAGE_MASK) != 0) ||
    (Start > (Start + NumberOfBytes))) {

This patch is to update "(Start > (Start + NumberOfBytes))" to "(Start >= End)"
to be consistent with "ASSERT (End > Start)"

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index 9dbb85da7c871b61582499fb6ebac4689a99f13c..62738a187546a6f9e39aef1d41304074ef758eb8 100644 (file)
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -1,7 +1,7 @@
 /** @file\r
   UEFI Memory page management functions.\r
 \r
-Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -725,7 +725,7 @@ CoreConvertPagesEx (
   ASSERT_LOCKED (&gMemoryLock);\r
   ASSERT ( (ChangingType == FALSE) || (ChangingAttributes == FALSE) );\r
 \r
-  if (NumberOfPages == 0 || ((Start & EFI_PAGE_MASK) != 0) || (Start > (Start + NumberOfBytes))) {\r
+  if (NumberOfPages == 0 || ((Start & EFI_PAGE_MASK) != 0) || (Start >= End)) {\r
     return EFI_INVALID_PARAMETER;\r
   }\r
 \r