diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 38 |
1 files changed, 12 insertions, 26 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 3dd4884c6f9e..e0bc632a259e 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1358,7 +1358,7 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif) return add_cpu_dev_symlink(policy, cpu); } -static void cpufreq_offline(unsigned int cpu) +static int cpufreq_offline(unsigned int cpu) { struct cpufreq_policy *policy; int ret; @@ -1368,7 +1368,7 @@ static void cpufreq_offline(unsigned int cpu) policy = cpufreq_cpu_get_raw(cpu); if (!policy) { pr_debug("%s: No cpu_data found\n", __func__); - return; + return 0; } down_write(&policy->rwsem); @@ -1417,6 +1417,7 @@ static void cpufreq_offline(unsigned int cpu) unlock: up_write(&policy->rwsem); + return 0; } /** @@ -2332,28 +2333,6 @@ unlock: } EXPORT_SYMBOL(cpufreq_update_policy); -static int cpufreq_cpu_callback(struct notifier_block *nfb, - unsigned long action, void *hcpu) -{ - unsigned int cpu = (unsigned long)hcpu; - - switch (action & ~CPU_TASKS_FROZEN) { - case CPU_ONLINE: - case CPU_DOWN_FAILED: - cpufreq_online(cpu); - break; - - case CPU_DOWN_PREPARE: - cpufreq_offline(cpu); - break; - } - return NOTIFY_OK; -} - -static struct notifier_block __refdata cpufreq_cpu_notifier = { - .notifier_call = cpufreq_cpu_callback, -}; - /********************************************************************* * BOOST * *********************************************************************/ @@ -2455,6 +2434,7 @@ EXPORT_SYMBOL_GPL(cpufreq_boost_enabled); /********************************************************************* * REGISTER / UNREGISTER CPUFREQ DRIVER * *********************************************************************/ +static enum cpuhp_state hp_online; /** * cpufreq_register_driver - register a CPU Frequency driver @@ -2517,7 +2497,13 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data) goto err_if_unreg; } - register_hotcpu_notifier(&cpufreq_cpu_notifier); + ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "cpufreq:online", + cpufreq_online, + cpufreq_offline); + if (ret < 0) + goto err_if_unreg; + hp_online = ret; + pr_debug("driver %s up and running\n", driver_data->name); goto out; @@ -2556,7 +2542,7 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver) get_online_cpus(); subsys_interface_unregister(&cpufreq_interface); remove_boost_sysfs_file(); - unregister_hotcpu_notifier(&cpufreq_cpu_notifier); + cpuhp_remove_state_nocalls(hp_online); write_lock_irqsave(&cpufreq_driver_lock, flags); |