Add Pointer check for NULL before referring it and remove unnecessary pointer check...

[mirror_edk2.git] / MdeModulePkg / Bus / Ata / AtaAtapiPassThru / AtaAtapiPassThru.c

diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
index 3e135d74ec60068882c30d3a323faf88fb77ba6c..526590718aa0e43fe2f2496103c7f6052eaed7ee 100644 (file)
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
@@ -794,7 +794,7 @@ ErrorExit:
            );\r
   }\r
 \r
-  if (Instance->TimerEvent != NULL) {\r
+  if ((Instance != NULL) && (Instance->TimerEvent != NULL)) {\r
     gBS->CloseEvent (Instance->TimerEvent);\r
   }\r
 \r