cpufreq: Initialize governor for a new policy under policy->rwsem

[sfrench/cifs-2.6.git] / drivers / cpufreq / cpufreq.c

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d6622689d0007ec50bbc3ba54f21860cec3dc791..cf485d9289035fe58ed9c84223ccd9f412a4b6cd 100644 (file)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1123,6 +1123,7 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
                policy->user_policy.max = policy->max;
        }
 
+       down_write(&policy->rwsem);
        write_lock_irqsave(&cpufreq_driver_lock, flags);
        for_each_cpu(j, policy->cpus)
                per_cpu(cpufreq_cpu_data, j) = policy;
@@ -1206,6 +1207,7 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
                policy->user_policy.policy = policy->policy;
                policy->user_policy.governor = policy->governor;
        }
+       up_write(&policy->rwsem);
 
        kobject_uevent(&policy->kobj, KOBJ_ADD);
        up_read(&cpufreq_rwsem);