diff options
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 3564947..a6f6595 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -858,13 +858,18 @@ static int cpufreq_add_policy_cpu(unsigned int cpu, unsigned int sibling, struct device *dev) { struct cpufreq_policy *policy; - int ret = 0; + int ret = 0, has_target = 0; unsigned long flags; policy = cpufreq_cpu_get(sibling); WARN_ON(!policy); - __cpufreq_governor(policy, CPUFREQ_GOV_STOP); + rcu_read_lock(); + has_target = !!rcu_dereference(cpufreq_driver)->target; + rcu_read_unlock(); + + if (has_target) + __cpufreq_governor(policy, CPUFREQ_GOV_STOP); lock_policy_rwsem_write(sibling); @@ -877,8 +882,10 @@ static int cpufreq_add_policy_cpu(unsigned int cpu, unsigned int sibling, unlock_policy_rwsem_write(sibling); - __cpufreq_governor(policy, CPUFREQ_GOV_START); - __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS); + if (has_target) { + __cpufreq_governor(policy, CPUFREQ_GOV_START); + __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS); + } ret = sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq"); if (ret) { @@ -1146,7 +1153,8 @@ static int __cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif /* If cpu is last user of policy, free policy */ if (cpus == 1) { - __cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT); + if (has_target) + __cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT); lock_policy_rwsem_read(cpu); kobj = &data->kobj; |