1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | #include <linux/kernel.h> |
3 | #include <linux/module.h> |
4 | #include <linux/of.h> |
5 | |
6 | #include "notifier-error-inject.h" |
7 | |
8 | static int priority; |
9 | module_param(priority, int, 0); |
10 | MODULE_PARM_DESC(priority, "specify OF reconfig notifier priority" ); |
11 | |
12 | static struct notifier_err_inject reconfig_err_inject = { |
13 | .actions = { |
14 | { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ATTACH_NODE) }, |
15 | { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_DETACH_NODE) }, |
16 | { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ADD_PROPERTY) }, |
17 | { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_REMOVE_PROPERTY) }, |
18 | { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_UPDATE_PROPERTY) }, |
19 | {} |
20 | } |
21 | }; |
22 | |
23 | static struct dentry *dir; |
24 | |
25 | static int err_inject_init(void) |
26 | { |
27 | int err; |
28 | |
29 | dir = notifier_err_inject_init(name: "OF-reconfig" , |
30 | parent: notifier_err_inject_dir, err_inject: &reconfig_err_inject, priority); |
31 | if (IS_ERR(ptr: dir)) |
32 | return PTR_ERR(ptr: dir); |
33 | |
34 | err = of_reconfig_notifier_register(&reconfig_err_inject.nb); |
35 | if (err) |
36 | debugfs_remove_recursive(dentry: dir); |
37 | |
38 | return err; |
39 | } |
40 | |
41 | static void err_inject_exit(void) |
42 | { |
43 | of_reconfig_notifier_unregister(&reconfig_err_inject.nb); |
44 | debugfs_remove_recursive(dentry: dir); |
45 | } |
46 | |
47 | module_init(err_inject_init); |
48 | module_exit(err_inject_exit); |
49 | |
50 | MODULE_DESCRIPTION("OF reconfig notifier error injection module" ); |
51 | MODULE_LICENSE("GPL" ); |
52 | MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>" ); |
53 | |