Index: kern/subr_bus.c
===================================================================
--- kern/subr_bus.c	(revision 236313)
+++ kern/subr_bus.c	(working copy)
@@ -1873,6 +1873,8 @@
 		return (error);
 	if (child->devclass)
 		devclass_delete_device(child->devclass, child);
+	if (child->parent)
+		BUS_CHILD_DELETED(dev, child);
 	TAILQ_REMOVE(&dev->children, child, link);
 	TAILQ_REMOVE(&bus_data_devices, child, devlink);
 	kobj_delete((kobj_t) child, M_BUS);
Index: kern/bus_if.m
===================================================================
--- kern/bus_if.m	(revision 236313)
+++ kern/bus_if.m	(working copy)
@@ -160,6 +160,20 @@
 };
 
 /**
+ * @brief Notify a bus that a child was deleted
+ *
+ * Called at the beginning of device_delete_child() to allow the parent
+ * to teardown any bus-specific state for the child.
+ * 
+ * @param _dev		the device whose child is being deleted
+ * @param _child	the child device which is being deleted
+ */
+METHOD void child_deleted {
+	device_t _dev;
+	device_t _child;
+};
+
+/**
  * @brief Notify a bus that a child was detached
  *
  * Called after the child's DEVICE_DETACH() method to allow the parent