[PATCH v2 5/6] lib/vsprintf: Make use of fwnode API to obtain node names and separators

[Sakari Ailus]

Instead of implementing our own means of discovering parent nodes, node
names or counting how many parents a node has, use the newly added
functions in the fwnode API to obtain that information.

Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
---
 lib/vsprintf.c | 37 +++++++++++++++----------------------
 1 file changed, 15 insertions(+), 22 deletions(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 5f60b8d41277..91f2a3e4892e 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -37,6 +37,7 @@
 #include <net/addrconf.h>
 #include <linux/siphash.h>
 #include <linux/compiler.h>
+#include <linux/property.h>
 #ifdef CONFIG_BLOCK
 #include <linux/blkdev.h>
 #endif
@@ -1720,32 +1721,23 @@ char *flags_string(char *buf, char *end, void 
*flags_ptr, const char *fmt)
        return format_flags(buf, end, flags, names);
 }
 
-static const char *device_node_name_for_depth(const struct device_node *np, 
int depth)
-{
-       for ( ; np && depth; depth--)
-               np = np->parent;
-
-       return kbasename(np->full_name);
-}
-
 static noinline_for_stack
-char *device_node_gen_full_name(const struct device_node *np, char *buf, char 
*end)
+char *fwnode_gen_full_name(struct fwnode_handle *fwnode, char *buf, char *end)
 {
        int depth;
-       const struct device_node *parent = np->parent;
 
-       /* special case for root node */
-       if (!parent)
-               return string(buf, end, "/", default_str_spec);
+       for (depth = fwnode_count_parents(fwnode); depth >= 0; depth--) {
+               struct fwnode_handle *__fwnode =
+                       fwnode_get_nth_parent(fwnode, depth);
 
-       for (depth = 0; parent->parent; depth++)
-               parent = parent->parent;
-
-       for ( ; depth >= 0; depth--) {
-               buf = string(buf, end, "/", default_str_spec);
-               buf = string(buf, end, device_node_name_for_depth(np, depth),
+               buf = string(buf, end, fwnode_get_name_prefix(__fwnode),
+                            default_str_spec);
+               buf = string(buf, end, fwnode_get_name(__fwnode),
                             default_str_spec);
+
+               fwnode_handle_put(__fwnode);
        }
+
        return buf;
 }
 
@@ -1790,10 +1782,11 @@ char *device_node_string(char *buf, char *end, struct 
device_node *dn,
 
                switch (*fmt) {
                case 'f':       /* full_name */
-                       buf = device_node_gen_full_name(dn, buf, end);
+                       buf = fwnode_gen_full_name(of_fwnode_handle(dn), buf,
+                                                  end);
                        break;
                case 'n':       /* name */
-                       p = kbasename(of_node_full_name(dn));
+                       p = fwnode_get_name(of_fwnode_handle(dn));
                        precision = str_spec.precision;
                        str_spec.precision = strchrnul(p, '@') - p;
                        buf = string(buf, end, p, str_spec);
@@ -1803,7 +1796,7 @@ char *device_node_string(char *buf, char *end, struct 
device_node *dn,
                        buf = number(buf, end, (unsigned int)dn->phandle, 
num_spec);
                        break;
                case 'P':       /* path-spec */
-                       p = kbasename(of_node_full_name(dn));
+                       p = fwnode_get_name(of_fwnode_handle(dn));
                        if (!p[1])
                                p = "/";
                        buf = string(buf, end, p, str_spec);
-- 
2.11.0