cpufreq: intel_pstate: Reuse refresh_frequency_limits()

The implementation of intel_pstate_update_max_freq() is quite similar to
refresh_frequency_limits(), lets reuse it.

Finding minimum of policy->user_policy.max and policy->cpuinfo.max_freq
in intel_pstate_update_max_freq() is redundant as cpufreq_set_policy()
will call the ->verify() callback of intel-pstate driver, which will do
this comparison anyway and so dropping it from
intel_pstate_update_max_freq() doesn't harm.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

3 files changed, 4 insertions, 7 deletions

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index b96ef6db1bfe..79bac52919a5 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1116,7 +1116,7 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cp
         return ret;
 }
 
-static void refresh_frequency_limits(struct cpufreq_policy *policy)
+void refresh_frequency_limits(struct cpufreq_policy *policy)
 {
         struct cpufreq_policy new_policy;
 
@@ -1129,6 +1129,7 @@ static void refresh_frequency_limits(struct cpufreq_policy *policy)
                 cpufreq_set_policy(policy, &new_policy);
         }
 }
+EXPORT_SYMBOL(refresh_frequency_limits);
 
 static void handle_update(struct work_struct *work)
 {
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index f2ff5de988c1..cc27d4c59dca 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -898,7 +898,6 @@ static void intel_pstate_update_policies(void)
 static void intel_pstate_update_max_freq(unsigned int cpu)
 {
         struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
-        struct cpufreq_policy new_policy;
         struct cpudata *cpudata;
 
         if (!policy)
@@ -908,11 +907,7 @@ static void intel_pstate_update_max_freq(unsigned int cpu)
         policy->cpuinfo.max_freq = global.turbo_disabled_mf ?
                         cpudata->pstate.max_freq : cpudata->pstate.turbo_freq;
 
-        memcpy(&new_policy, policy, sizeof(*policy));
-        new_policy.max = min(policy->user_policy.max, policy->cpuinfo.max_freq);
-        new_policy.min = min(policy->user_policy.min, new_policy.max);
-
-        cpufreq_set_policy(policy, &new_policy);
+        refresh_frequency_limits(policy);
 
         cpufreq_cpu_release(policy);
 }
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 95425941f46d..1fa37b675a80 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -207,6 +207,7 @@ void cpufreq_cpu_release(struct cpufreq_policy *policy);
 int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
 int cpufreq_set_policy(struct cpufreq_policy *policy,
                        struct cpufreq_policy *new_policy);
+void refresh_frequency_limits(struct cpufreq_policy *policy);
 void cpufreq_update_policy(unsigned int cpu);
 void cpufreq_update_limits(unsigned int cpu);
 bool have_governor_per_policy(void);