1 files changed, 34 insertions, 1 deletions

diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index 6aca991..a144031 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -3311,7 +3311,7 @@ resource_list_alloc(struct resource_list *rl, device_t bus, device_t child,
 {
 	struct resource_list_entry *rle = NULL;
 	int passthrough = (device_get_parent(child) != bus);
-	int isdefault = (start == 0UL && end == ~0UL);
+	int isdefault = RMAN_IS_DEFAULT_RANGE(start, end);
 
 	if (passthrough) {
 		return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
@@ -4095,6 +4095,22 @@ bus_generic_get_dma_tag(device_t dev, device_t child)
 }
 
 /**
+ * @brief Helper function for implementing BUS_GET_BUS_TAG().
+ *
+ * This simple implementation of BUS_GET_BUS_TAG() simply calls the
+ * BUS_GET_BUS_TAG() method of the parent of @p dev.
+ */
+bus_space_tag_t
+bus_generic_get_bus_tag(device_t dev, device_t child)
+{
+
+	/* Propagate up the bus hierarchy until someone handles it. */
+	if (dev->parent != NULL)
+		return (BUS_GET_BUS_TAG(dev->parent, child));
+	return ((bus_space_tag_t)0);
+}
+
+/**
  * @brief Helper function for implementing BUS_GET_RESOURCE().
  *
  * This implementation of BUS_GET_RESOURCE() uses the
@@ -4576,6 +4592,23 @@ bus_get_dma_tag(device_t dev)
 }
 
 /**
+ * @brief Wrapper function for BUS_GET_BUS_TAG().
+ *
+ * This function simply calls the BUS_GET_BUS_TAG() method of the
+ * parent of @p dev.
+ */
+bus_space_tag_t
+bus_get_bus_tag(device_t dev)
+{
+	device_t parent;
+
+	parent = device_get_parent(dev);
+	if (parent == NULL)
+		return ((bus_space_tag_t)0);
+	return (BUS_GET_BUS_TAG(parent, dev));
+}
+
+/**
  * @brief Wrapper function for BUS_GET_DOMAIN().
  *
  * This function simply calls the BUS_GET_DOMAIN() method of the