Merge remote branch 'origin/master' of ../linux-2.6 into drm-next

[firefly-linux-kernel-4.4.55.git] / drivers / cpufreq / cpufreq_conservative.c

diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 57490502b21cbddbd71c2ef38b0134b62e55d21d..bdea7e2f94baa9c6f3743a1bdefc84ba44376822 100644 (file)
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -63,6 +63,7 @@ struct cpu_dbs_info_s {
        unsigned int down_skip;
        unsigned int requested_freq;
        int cpu;
+       unsigned int enable:1;
        /*
         * percpu mutex that serializes governor limit change with
         * do_dbs_timer invocation. We do not want do_dbs_timer to run
@@ -141,6 +142,9 @@ dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
 
        struct cpufreq_policy *policy;
 
+       if (!this_dbs_info->enable)
+               return 0;
+
        policy = this_dbs_info->cur_policy;
 
        /*
@@ -497,6 +501,7 @@ static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
        int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
        delay -= jiffies % delay;
 
+       dbs_info->enable = 1;
        INIT_DELAYED_WORK_DEFERRABLE(&dbs_info->work, do_dbs_timer);
        queue_delayed_work_on(dbs_info->cpu, kconservative_wq, &dbs_info->work,
                                delay);
@@ -504,6 +509,7 @@ static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
 
 static inline void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info)
 {
+       dbs_info->enable = 0;
        cancel_delayed_work_sync(&dbs_info->work);
 }