diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index c9f31491009fb..9e3198782507d 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3792,7 +3792,8 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
 	if (fail)
 		return -EINVAL;
 
-	ftrace_graph_filter_enabled = 1;
+	ftrace_graph_filter_enabled = !!(*idx);
+
 	return 0;
 }