Index: VirtualBox-5.1.2/src/VBox/Devices/Storage/DevLsiLogicSCSI.cpp
===================================================================
--- VirtualBox-5.1.2.orig/src/VBox/Devices/Storage/DevLsiLogicSCSI.cpp
+++ VirtualBox-5.1.2/src/VBox/Devices/Storage/DevLsiLogicSCSI.cpp
@@ -3771,7 +3771,7 @@ static DECLCALLBACK(int) lsilogicR3IsaIO
     Log2(("%s: pu32=%p:{%.*Rhxs} iRegister=%d rc=%Rrc\n",
           __FUNCTION__, pu32, 1, pu32, iRegister, rc));
 
-    return rc;
+    return VINF_SUCCESS;
 }
 
 /**