diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2012-12-10 11:20:46 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2013-02-11 10:39:06 +0530 |
| commit | 6b4d88298725266f6679818dab2db76c37c1e5ab (patch) | |
| tree | efd11a5f23d6e6bc5380be0555e47dc3daa08497 | |
| parent | ffa55ad028b9ad1b4f1f727af8efbcd5c084bc8d (diff) | |
cpufreq: Notify governors when cpus are hot-[un]plugged
Because cpufreq core and governors worry only about the online cpus, if a cpu is
hot [un]plugged, we must notify governors about it, otherwise be ready to expect
something unexpected.
We already have notifiers in the form of CPUFREQ_GOV_START/CPUFREQ_GOV_STOP, we
just need to call them now.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index de9951766dd..a0a33bdb453 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -751,11 +751,16 @@ static int cpufreq_add_dev_policy(unsigned int cpu, return -EBUSY; } + __cpufreq_governor(managed_policy, CPUFREQ_GOV_STOP); + spin_lock_irqsave(&cpufreq_driver_lock, flags); cpumask_copy(managed_policy->cpus, policy->cpus); per_cpu(cpufreq_cpu_data, cpu) = managed_policy; spin_unlock_irqrestore(&cpufreq_driver_lock, flags); + __cpufreq_governor(managed_policy, CPUFREQ_GOV_START); + __cpufreq_governor(managed_policy, CPUFREQ_GOV_LIMITS); + pr_debug("CPU already managed, adding link\n"); ret = sysfs_create_link(&dev->kobj, &managed_policy->kobj, @@ -1066,8 +1071,13 @@ static int __cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif */ if (unlikely(cpu != data->cpu)) { pr_debug("removing link\n"); + __cpufreq_governor(data, CPUFREQ_GOV_STOP); cpumask_clear_cpu(cpu, data->cpus); spin_unlock_irqrestore(&cpufreq_driver_lock, flags); + + __cpufreq_governor(data, CPUFREQ_GOV_START); + __cpufreq_governor(data, CPUFREQ_GOV_LIMITS); + kobj = &dev->kobj; cpufreq_cpu_put(data); unlock_policy_rwsem_write(cpu); |