diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index eb4086f..8830569 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1839,6 +1839,9 @@
 	BUG_ON(!service_tree);
 	BUG_ON(!service_tree->count);
 
+	if (!cfqd->cfq_slice_idle)
+		return false;
+
 	/* We never do for idle class queues. */
 	if (prio == IDLE_WORKLOAD)
 		return false;
@@ -1879,7 +1882,7 @@
 	/*
 	 * idle is disabled, either manually or by past process history
 	 */
-	if (!cfqd->cfq_slice_idle || !cfq_should_idle(cfqd, cfqq))
+	if (!cfq_should_idle(cfqd, cfqq))
 		return;
 
 	/*