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-rw-r--r--drivers/cpufreq/cpufreq.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 1ba4039777e..8d328186f77 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -423,6 +423,8 @@ static ssize_t store_scaling_governor (struct cpufreq_policy * policy,
if (cpufreq_parse_governor(str_governor, &new_policy.policy, &new_policy.governor))
return -EINVAL;
+ lock_cpu_hotplug();
+
/* Do not use cpufreq_set_policy here or the user_policy.max
will be wrongly overridden */
mutex_lock(&policy->lock);
@@ -432,6 +434,8 @@ static ssize_t store_scaling_governor (struct cpufreq_policy * policy,
policy->user_policy.governor = policy->governor;
mutex_unlock(&policy->lock);
+ unlock_cpu_hotplug();
+
return ret ? ret : count;
}