[PATCH 1/3] cpufreq: schedutil: enable fast switch earlier

[Viresh Kumar]

The fast_switch_enabled flag will be used a bit earlier while converting
the schedutil governor to use kthread worker.

Prepare for that by moving the call to enable it to the beginning of
sugov_init().

Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org>
---
 kernel/sched/cpufreq_schedutil.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 69e06898997d..ccb2ab89affb 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -416,9 +416,13 @@ static int sugov_init(struct cpufreq_policy *policy)
        if (policy->governor_data)
                return -EBUSY;
 
+       cpufreq_enable_fast_switch(policy);
+
        sg_policy = sugov_policy_alloc(policy);
-       if (!sg_policy)
-               return -ENOMEM;
+       if (!sg_policy) {
+               ret = -ENOMEM;
+               goto disable_fast_switch;
+       }
 
        mutex_lock(&global_tunables_lock);
 
@@ -456,8 +460,6 @@ static int sugov_init(struct cpufreq_policy *policy)
 
  out:
        mutex_unlock(&global_tunables_lock);
-
-       cpufreq_enable_fast_switch(policy);
        return 0;
 
  fail:
@@ -468,6 +470,10 @@ static int sugov_init(struct cpufreq_policy *policy)
        mutex_unlock(&global_tunables_lock);
 
        sugov_policy_free(sg_policy);
+
+ disable_fast_switch:
+       cpufreq_disable_fast_switch(policy);
+
        pr_err("initialization failed (error %d)\n", ret);
        return ret;
 }
@@ -478,8 +484,6 @@ static void sugov_exit(struct cpufreq_policy *policy)
        struct sugov_tunables *tunables = sg_policy->tunables;
        unsigned int count;
 
-       cpufreq_disable_fast_switch(policy);
-
        mutex_lock(&global_tunables_lock);
 
        count = gov_attr_set_put(&tunables->attr_set, 
&sg_policy->tunables_hook);
@@ -490,6 +494,7 @@ static void sugov_exit(struct cpufreq_policy *policy)
        mutex_unlock(&global_tunables_lock);
 
        sugov_policy_free(sg_policy);
+       cpufreq_disable_fast_switch(policy);
 }
 
 static int sugov_start(struct cpufreq_policy *policy)
-- 
2.7.1.410.g6faf27b