--- 76dad48088474462b5f21deeff0414b40aca6b8e
+++ 72324720a973a62d542f3df2afbe00fe132a6907
@@ -64,6 +64,8 @@ static inline int task_ioprio_class(stru
 
 static inline int task_nice_ioprio(struct task_struct *task)
 {
+	if (iso_task(task))
+		return 0;
 	return (task_nice(task) + 20) / 5;
 }