diff options
| -rw-r--r-- | drivers/of/selftest.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c index 252a7ed..4f83e97 100644 --- a/drivers/of/selftest.c +++ b/drivers/of/selftest.c @@ -7,6 +7,7 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/errno.h> +#include <linux/hashtable.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_fdt.h> @@ -192,6 +193,51 @@ static void __init of_selftest_check_tree_linkage(void) pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); } +struct node_hash { + struct hlist_node node; + struct device_node *np; +}; + +static void __init of_selftest_check_phandles(void) +{ + struct device_node *np; + struct node_hash *nh; + struct hlist_node *tmp; + int i, dup_count = 0, phandle_count = 0; + DECLARE_HASHTABLE(ht, 8); + + hash_init(ht); + for_each_of_allnodes(np) { + if (!np->phandle) + continue; + + hash_for_each_possible(ht, nh, node, np->phandle) { + if (nh->np->phandle == np->phandle) { + pr_info("Duplicate phandle! %i used by %s and %s\n", + np->phandle, nh->np->full_name, np->full_name); + dup_count++; + break; + } + } + + nh = kzalloc(sizeof(*nh), GFP_KERNEL); + if (WARN_ON(!nh)) + return; + + nh->np = np; + hash_add(ht, &nh->node, np->phandle); + phandle_count++; + } + selftest(dup_count == 0, "Found %i duplicates in %i phandles\n", + dup_count, phandle_count); + + /* Clean up */ + hash_for_each_safe(ht, i, tmp, nh, node) { + hash_del(&nh->node); + kfree(nh); + } +} + static void __init of_selftest_parse_phandle_with_args(void) { struct device_node *np; @@ -825,6 +871,7 @@ static int __init of_selftest(void) pr_info("start of selftest - you will see error messages\n"); of_selftest_check_tree_linkage(); + of_selftest_check_phandles(); of_selftest_find_node_by_name(); of_selftest_dynamic(); of_selftest_parse_phandle_with_args(); |