diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index f20951e23f5a..7777ea6a6b9b 100755
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5311,7 +5311,7 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags)
 	 * utilization updates, so do it here explicitly with the IOWAIT flag
 	 * passed.
 	 */
-	if (p->in_iowait)
+	if (p->in_iowait && prefer_idle)
 		cpufreq_update_util(rq, SCHED_CPUFREQ_IOWAIT);
 
 	for_each_sched_entity(se) {