svn commit: r275937 - head/sys/dev/fdt

[Andrew Turner]

Author: andrew
Date: Fri Dec 19 13:07:36 2014
New Revision: 275937
URL: https://svnweb.freebsd.org/changeset/base/275937

Log:
  Add support for empty ranges properties within the tree, some vendor
  device trees have these, for example the ARM AArch64 Foundation Model.
  
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/dev/fdt/fdt_common.c

Modified: head/sys/dev/fdt/fdt_common.c
==============================================================================
--- head/sys/dev/fdt/fdt_common.c	Fri Dec 19 12:09:29 2014	(r275936)
+++ head/sys/dev/fdt/fdt_common.c	Fri Dec 19 13:07:36 2014	(r275937)
@@ -75,6 +75,12 @@ fdt_get_range_by_busaddr(phandle_t node,
 	u_long bus_addr, par_bus_addr, pbase, psize;
 	int err, i, len, tuple_size, tuples;
 
+	if (node == 0) {
+		*base = 0;
+		*size = ULONG_MAX;
+		return (0);
+	}
+
 	if ((fdt_addrsize_cells(node, &addr_cells, &size_cells)) != 0)
 		return (ENXIO);
 	/*
@@ -91,9 +97,8 @@ fdt_get_range_by_busaddr(phandle_t node,
 	if (len > sizeof(ranges))
 		return (ENOMEM);
 	if (len == 0) {
-		*base = 0;
-		*size = ULONG_MAX;
-		return (0);
+		return (fdt_get_range_by_busaddr(OF_parent(node), addr,
+		    base, size));
 	}
 
 	if (OF_getprop(node, "ranges", ranges, sizeof(ranges)) <= 0)