Root/lib/of-reconfig-notifier-error-inject.c

1#include <linux/kernel.h>
2#include <linux/module.h>
3#include <linux/of.h>
4
5#include "notifier-error-inject.h"
6
7static int priority;
8module_param(priority, int, 0);
9MODULE_PARM_DESC(priority, "specify OF reconfig notifier priority");
10
11static struct notifier_err_inject reconfig_err_inject = {
12    .actions = {
13        { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ATTACH_NODE) },
14        { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_DETACH_NODE) },
15        { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ADD_PROPERTY) },
16        { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_REMOVE_PROPERTY) },
17        { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_UPDATE_PROPERTY) },
18        {}
19    }
20};
21
22static struct dentry *dir;
23
24static int err_inject_init(void)
25{
26    int err;
27
28    dir = notifier_err_inject_init("OF-reconfig",
29        notifier_err_inject_dir, &reconfig_err_inject, priority);
30    if (IS_ERR(dir))
31        return PTR_ERR(dir);
32
33    err = of_reconfig_notifier_register(&reconfig_err_inject.nb);
34    if (err)
35        debugfs_remove_recursive(dir);
36
37    return err;
38}
39
40static void err_inject_exit(void)
41{
42    of_reconfig_notifier_unregister(&reconfig_err_inject.nb);
43    debugfs_remove_recursive(dir);
44}
45
46module_init(err_inject_init);
47module_exit(err_inject_exit);
48
49MODULE_DESCRIPTION("OF reconfig notifier error injection module");
50MODULE_LICENSE("GPL");
51MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
52

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