diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 70568f8b6c536976881fc1c94f5036341f03812f..79ad4b3d215c86a7ef380e968a2b32d9f95b99f0 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -650,14 +650,14 @@ static bool md_in_flight(struct mapped_device *md)
 {
 	int cpu;
 	struct hd_struct *part = &dm_disk(md)->part0;
+	long sum = 0;
 
 	for_each_possible_cpu(cpu) {
-		if (part_stat_local_read_cpu(part, in_flight[0], cpu) ||
-		    part_stat_local_read_cpu(part, in_flight[1], cpu))
-			return true;
+		sum += part_stat_local_read_cpu(part, in_flight[0], cpu);
+		sum += part_stat_local_read_cpu(part, in_flight[1], cpu);
 	}
 
-	return false;
+	return sum != 0;
 }
 
 static void start_io_acct(struct dm_io *io)
@@ -691,10 +691,8 @@ static void end_io_acct(struct dm_io *io)
 				    true, duration, &io->stats_aux);
 
 	/* nudge anyone waiting on suspend queue */
-	if (unlikely(waitqueue_active(&md->wait))) {
-		if (!md_in_flight(md))
-			wake_up(&md->wait);
-	}
+	if (unlikely(waitqueue_active(&md->wait)))
+		wake_up(&md->wait);
 }
 
 /*