diff options
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 118dbf1cef44..6ec828805428 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2333,6 +2333,9 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb, { unsigned int cpu = (unsigned long)hcpu; + if (!cpufreq_driver) + return NOTIFY_OK; + switch (action & ~CPU_TASKS_FROZEN) { case CPU_ONLINE: cpufreq_online(cpu); @@ -2499,6 +2502,9 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data) pr_debug("trying to register driver %s\n", driver_data->name); + /* Register for hotplug notifers before blocking hotplug. */ + register_hotcpu_notifier(&cpufreq_cpu_notifier); + /* Protect against concurrent CPU online/offline. */ get_online_cpus(); @@ -2530,7 +2536,6 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data) goto err_if_unreg; } - register_hotcpu_notifier(&cpufreq_cpu_notifier); pr_info("driver %s up and running\n", driver_data->name); out: |