DeviceExtension->PhysicalDeviceObject = PhysicalDeviceObject;
DeviceExtension->LowerDeviceObject = IoAttachDeviceToDeviceStack(DeviceObject, PhysicalDeviceObject);
+ KeInitializeSpinLock(&DeviceExtension->CommonLock);
+
IoInitializeTimer(DeviceObject, USBSTOR_TimerRoutine, (PVOID)DeviceExtension);
// did attaching fail