[POWERPC] bootwrapper: Make ft_get_parent() return a phandle, and NULL if already top-level.
Most of ft_get_parent() is factored out into __ft_get_parent(), which
deals only in internal node pointers. The ft_get_parent() wrapper
handles phandle conversion in both directions (previously,
ft_get_parent() did not convert its return value).
It also now returns NULL as the parent of the toplevel node, rather than
just returning the toplevel node again (which made it rather useless in
loops).
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/flatdevtree.c b/arch/powerpc/boot/flatdevtree.c
index 9de267d..88b178a 100644
--- a/arch/powerpc/boot/flatdevtree.c
+++ b/arch/powerpc/boot/flatdevtree.c
@@ -728,20 +728,15 @@
return NULL;
}
-void *ft_get_parent(struct ft_cxt *cxt, const void *phandle)
+void *__ft_get_parent(struct ft_cxt *cxt, void *node)
{
- void *node;
int d;
struct ft_atom atom;
char *p;
- node = ft_node_ph2node(cxt, phandle);
- if (node == NULL)
- return NULL;
-
for (d = 0; cxt->genealogy[d] != NULL; ++d)
if (cxt->genealogy[d] == node)
- return cxt->genealogy[d > 0 ? d - 1 : 0];
+ return d > 0 ? cxt->genealogy[d - 1] : NULL;
/* have to do it the hard way... */
p = ft_root_node(cxt);
@@ -753,7 +748,7 @@
if (node == atom.data) {
/* found it */
cxt->genealogy[d + 1] = NULL;
- return d > 0 ? cxt->genealogy[d - 1] : node;
+ return d > 0 ? cxt->genealogy[d - 1] : NULL;
}
++d;
break;
@@ -765,6 +760,16 @@
return NULL;
}
+void *ft_get_parent(struct ft_cxt *cxt, const void *phandle)
+{
+ void *node = ft_node_ph2node(cxt, phandle);
+ if (node == NULL)
+ return NULL;
+
+ node = __ft_get_parent(cxt, node);
+ return ft_get_phandle(cxt, node);
+}
+
static const void *__ft_get_prop(struct ft_cxt *cxt, void *node,
const char *propname, unsigned int *len)
{
diff --git a/arch/powerpc/boot/flatdevtree.h b/arch/powerpc/boot/flatdevtree.h
index 1f37ca2..9500424 100644
--- a/arch/powerpc/boot/flatdevtree.h
+++ b/arch/powerpc/boot/flatdevtree.h
@@ -104,5 +104,6 @@
void *buf, const unsigned int buflen);
int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
const void *buf, const unsigned int buflen);
+void *ft_get_parent(struct ft_cxt *cxt, const void *phandle);
#endif /* FLATDEVTREE_H */