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-rw-r--r--drivers/cpufreq/cpufreq_ondemand.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index fecfcdda6ddd..7b5093664e49 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -609,7 +609,9 @@ static void do_dbs_timer(struct work_struct *work)
609 /* We want all CPUs to do sampling nearly on same jiffy */ 609 /* We want all CPUs to do sampling nearly on same jiffy */
610 int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate); 610 int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
611 611
612 delay -= jiffies % delay; 612 if (num_online_cpus() > 1)
613 delay -= jiffies % delay;
614
613 mutex_lock(&dbs_info->timer_mutex); 615 mutex_lock(&dbs_info->timer_mutex);
614 616
615 /* Common NORMAL_SAMPLE setup */ 617 /* Common NORMAL_SAMPLE setup */
@@ -634,7 +636,9 @@ static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info)
634{ 636{
635 /* We want all CPUs to do sampling nearly on same jiffy */ 637 /* We want all CPUs to do sampling nearly on same jiffy */
636 int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate); 638 int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
637 delay -= jiffies % delay; 639
640 if (num_online_cpus() > 1)
641 delay -= jiffies % delay;
638 642
639 dbs_info->sample_type = DBS_NORMAL_SAMPLE; 643 dbs_info->sample_type = DBS_NORMAL_SAMPLE;
640 INIT_DELAYED_WORK_DEFERRABLE(&dbs_info->work, do_dbs_timer); 644 INIT_DELAYED_WORK_DEFERRABLE(&dbs_info->work, do_dbs_timer);