resource_list_purge: release the resources in this list, and purge the

elements of this list (eg, reset it).

Man page to follow

2 files changed, 22 insertions, 0 deletions

diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index c08d66b..531eaf9 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -2805,6 +2805,27 @@ resource_list_print_type(struct resource_list *rl, const char *name, int type,
 }
 
 /**
+ * @brief Releases all the resources in a list.
+ *
+ * @param rl		The resource list to purge.
+ * 
+ * @returns		nothing
+ */
+void
+resource_list_purge(struct resource_list *rl)
+{
+	struct resource_list_entry *rle;
+
+	STAILQ_FOREACH(rle, rl, link) {
+		if (rle->res)
+			bus_release_resource(rman_get_device(rle->res),
+			    rle->type, rle->rid, rle->res);
+		STAILQ_REMOVE_HEAD(rl, link);
+		free(rle, M_BUS);
+	}
+}
+
+/**
  * @brief Helper function for implementing DEVICE_PROBE()
  *
  * This function can be used to help implement the DEVICE_PROBE() for
diff --git a/sys/sys/bus.h b/sys/sys/bus.h
index 6a54a72..b811b14 100644
--- a/sys/sys/bus.h
+++ b/sys/sys/bus.h
@@ -227,6 +227,7 @@ struct resource *
 int	resource_list_release(struct resource_list *rl,
 			      device_t bus, device_t child,
 			      int type, int rid, struct resource *res);
+void	resource_list_purge(struct resource_list *rl);
 int	resource_list_print_type(struct resource_list *rl,
 				 const char *name, int type,
 				 const char *format);