Refine code to make it more safely.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15597 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c b/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c
index c5a789428bf0028169b73c6cde675511cca64f15..c540d420da0cd1ed056ccaf0008d5c9d4fce7163 100644 (file)
--- a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c
+++ b/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c
@@ -59,11 +59,13 @@ DxeTscTimerLibConstructor (
   EFI_STATUS  Status;\r
   UINT64      *TscFrequency;\r
 \r
+  TscFrequency = NULL;\r
   //\r
   // Get TSC frequency from system configuration table with TSC frequency GUID.\r
   //\r
   Status = EfiGetSystemConfigurationTable (&gEfiTscFrequencyGuid, (VOID **) &TscFrequency);\r
   if (Status == EFI_SUCCESS) {\r
+    ASSERT (TscFrequency != NULL);\r
     mTscFrequency = *TscFrequency;\r
     return EFI_SUCCESS;\r
   }\r