1 #include <linux/string.h>
3 #include <linux/slab.h>
6 #include "of_helpers.h"
9 * pseries_of_derive_parent - basically like dirname(1)
10 * @path: the full_name of a node to be added to the tree
12 * Returns the node which should be the parent of the node
13 * described by path. E.g., for path = "/foo/bar", returns
14 * the node with full_name = "/foo".
16 struct device_node
*pseries_of_derive_parent(const char *path
)
18 struct device_node
*parent
= NULL
;
19 char *parent_path
= "/";
20 size_t parent_path_len
= strrchr(path
, '/') - path
+ 1;
22 /* reject if path is "/" */
23 if (!strcmp(path
, "/"))
24 return ERR_PTR(-EINVAL
);
26 if (strrchr(path
, '/') != path
) {
27 parent_path
= kmalloc(parent_path_len
, GFP_KERNEL
);
29 return ERR_PTR(-ENOMEM
);
30 strlcpy(parent_path
, path
, parent_path_len
);
32 parent
= of_find_node_by_path(parent_path
);
34 return ERR_PTR(-EINVAL
);
35 if (strcmp(parent_path
, "/"))
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