--- xnu/xnu-12377.101.15/iokit/Kernel/IOInterruptEventSource.cpp
+++ xnu/xnu-7195.60.75/iokit/Kernel/IOInterruptEventSource.cpp
@@ -84,15 +84,17 @@
 {
 	bool res = true;
 
-	if (inIntIndex < 0) {
-		return false;
-	}
-
 	if (!super::init(inOwner, (IOEventSourceAction) inAction)) {
 		return false;
 	}
 
-	reserved = IOMallocType(ExpansionData);
+	reserved = IONew(ExpansionData, 1);
+
+	if (!reserved) {
+		return false;
+	}
+
+	bzero(reserved, sizeof(ExpansionData));
 
 	provider = inProvider;
 	producerCount = consumerCount = 0;
@@ -111,7 +113,17 @@
 			 * We also avoid try to avoid interrupt accounting overhead if none of
 			 * the statistics are enabled.
 			 */
-			reserved->statistics = IOMallocType(IOInterruptAccountingData);
+			reserved->statistics = IONew(IOInterruptAccountingData, 1);
+
+			if (!reserved->statistics) {
+				/*
+				 * We rely on the free() routine to clean up after us if init fails
+				 * midway.
+				 */
+				return false;
+			}
+
+			bzero(reserved->statistics, sizeof(IOInterruptAccountingData));
 
 			reserved->statistics->owner = this;
 		}
@@ -239,10 +251,10 @@
 
 	if (reserved) {
 		if (reserved->statistics) {
-			IOFreeType(reserved->statistics, IOInterruptAccountingData);
-		}
-
-		IOFreeType(reserved, ExpansionData);
+			IODelete(reserved->statistics, IOInterruptAccountingData, 1);
+		}
+
+		IODelete(reserved, ExpansionData, 1);
 	}
 
 	super::free();
@@ -413,18 +425,18 @@
 		}
 
 		if (reserved->statistics) {
+			if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {
+				IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCountIndex], 1);
+			}
+
+			if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCPUTimeIndex)) {
+				endCPUTime = thread_get_runtime_self();
+				IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCPUTimeIndex], endCPUTime - startCPUTime);
+			}
+
 			if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
 				endSystemTime = mach_absolute_time();
 				IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
-			}
-
-			if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCPUTimeIndex)) {
-				endCPUTime = thread_get_runtime_self();
-				IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCPUTimeIndex], endCPUTime - startCPUTime);
-			}
-
-			if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {
-				IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCountIndex], 1);
 			}
 		}