[PATCH 12/18] Make ft_get_parent() return a phandle, and NULL if already top-level.
From: Scott Wood <hidden>
Date: 2007-01-24 21:07:26
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
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 <redacted> --- arch/powerpc/boot/flatdevtree.c | 21 +++++++++++++-------- arch/powerpc/boot/flatdevtree.h | 1 + 2 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/boot/flatdevtree.c b/arch/powerpc/boot/flatdevtree.c
index f50b1b9..87e6636 100644
--- a/arch/powerpc/boot/flatdevtree.c
+++ b/arch/powerpc/boot/flatdevtree.c@@ -727,20 +727,15 @@ void *ft_find_descendent(struct ft_cxt * 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_first_node(cxt);
@@ -752,7 +747,7 @@ void *ft_get_parent(struct ft_cxt *cxt, 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;
@@ -764,6 +759,16 @@ void *ft_get_parent(struct ft_cxt *cxt, 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_node_add(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 462fbb9..64c5513 100644
--- a/arch/powerpc/boot/flatdevtree.h
+++ b/arch/powerpc/boot/flatdevtree.h@@ -103,5 +103,6 @@ int ft_get_prop(struct ft_cxt *cxt, cons 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 */
--
1.4.4