--- xnu/xnu-1228/iokit/Kernel/IOInterruptController.cpp
+++ xnu/xnu-792.21.3/iokit/Kernel/IOInterruptController.cpp
@@ -433,8 +433,6 @@
   _numInterruptSources = 1;
   
   // Set up the IOInterruptSource to point at this.
-  parentController->retain();
-  parentSource->retain();
   _interruptSources[0].interruptController = parentController;
   _interruptSources[0].vectorData = parentSource;
   
@@ -674,8 +672,7 @@
 
 IOInterruptAction IOSharedInterruptController::getInterruptHandlerAddress(void)
 {
-    return OSMemberFunctionCast(IOInterruptAction,
-			this, &IOSharedInterruptController::handleInterrupt);
+    return (IOInterruptAction)&IOSharedInterruptController::handleInterrupt;
 }
 
 IOReturn IOSharedInterruptController::handleInterrupt(void * /*refCon*/,