commit d0f65b21c58b958ba370e774c6fe3ddc5ff1f3c7
author Eric Dong <eric.dong@intel.com> Thu Jun 26 03:18:44 2014 +0000
committer ydong10 <ydong10@6f19259b-4bc3-4df7-8a09-765794883524> Thu Jun 26 03:18:44 2014 +0000
tree 4e9957168a0c8d4fb88819a6efb2412cdf59bc27
parent 6afd9f45bb4b72ef3952d1b01e9dee909f414b5e

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

PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c

diff --git a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c b/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c
index c5a7894..c540d42 100644
--- a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c
+++ b/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c
@@ -59,11 +59,13 @@
   EFI_STATUS  Status;

   UINT64      *TscFrequency;

 

+  TscFrequency = NULL;

   //

   // Get TSC frequency from system configuration table with TSC frequency GUID.

   //

   Status = EfiGetSystemConfigurationTable (&gEfiTscFrequencyGuid, (VOID **) &TscFrequency);

   if (Status == EFI_SUCCESS) {

+    ASSERT (TscFrequency != NULL);

     mTscFrequency = *TscFrequency;

     return EFI_SUCCESS;

   }