diff --git a/drivers/md/dm-bow.c b/drivers/md/dm-bow.c
index cfd1fa63ff97..9bdffb302410 100644
--- a/drivers/md/dm-bow.c
+++ b/drivers/md/dm-bow.c
@@ -599,13 +599,6 @@ static void dm_bow_dtr(struct dm_target *ti)
 	struct bow_context *bc = (struct bow_context *) ti->private;
 	struct kobject *kobj;
 
-	while (rb_first(&bc->ranges)) {
-		struct bow_range *br = container_of(rb_first(&bc->ranges),
-						    struct bow_range, node);
-
-		rb_erase(&br->node, &bc->ranges);
-		kfree(br);
-	}
 	if (bc->workqueue)
 		destroy_workqueue(bc->workqueue);
 	if (bc->bufio)
@@ -617,6 +610,15 @@ static void dm_bow_dtr(struct dm_target *ti)
 		wait_for_completion(dm_get_completion_from_kobject(kobj));
 	}
 
+	while (rb_first(&bc->ranges)) {
+		struct bow_range *br = container_of(rb_first(&bc->ranges),
+					      struct bow_range, node);
+
+		rb_erase(&br->node, &bc->ranges);
+		kfree(br);
+	}
+
+	mutex_destroy(&bc->ranges_lock);
 	kfree(bc->log_sector);
 	kfree(bc);
 }