[PATCH 4/5] lib/vsprintf: Make use of fwnode API to obtain node names and separators

Sakari Ailus
2019-03-22T15:29:29Z

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.ailus@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