--- b/drivers/infiniband/sw/rxe/rxe_task.c
+++ r/drivers/infiniband/sw/rxe/rxe_task.c
@@ -107,6 +107,8 @@ void rxe_cleanup_task(struct rxe_task *t
 {
 	bool idle;
 
+	if (!task->func)
+		return;
 	/*
 	 * Mark the task, then wait for it to finish. It might be
 	 * running in a non-tasklet (direct call) context.