1 // SPDX-License-Identifier: GPL-2.0-only 2 #include <linux/kernel.h> 3 #include <linux/module.h> 4 #include <linux/suspend.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 PM notifier priority"); 11 12 static struct notifier_err_inject pm_notifier_err_inject = { 13 .actions = { 14 { NOTIFIER_ERR_INJECT_ACTION(PM_HIBERNATION_PREPARE) }, 15 { NOTIFIER_ERR_INJECT_ACTION(PM_SUSPEND_PREPARE) }, 16 { NOTIFIER_ERR_INJECT_ACTION(PM_RESTORE_PREPARE) }, 17 {} 18 } 19 }; 20 21 static struct dentry *dir; 22 23 static int err_inject_init(void) 24 { 25 int err; 26 27 dir = notifier_err_inject_init("pm", notifier_err_inject_dir, 28 &pm_notifier_err_inject, priority); 29 if (IS_ERR(dir)) 30 return PTR_ERR(dir); 31 32 err = register_pm_notifier(&pm_notifier_err_inject.nb); 33 if (err) 34 debugfs_remove_recursive(dir); 35 36 return err; 37 } 38 39 static void err_inject_exit(void) 40 { 41 unregister_pm_notifier(&pm_notifier_err_inject.nb); 42 debugfs_remove_recursive(dir); 43 } 44 45 module_init(err_inject_init); 46 module_exit(err_inject_exit); 47 48 MODULE_DESCRIPTION("PM notifier error injection module"); 49 MODULE_LICENSE("GPL"); 50 MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>"); 51