diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 9e2e39b..f1f0ce9 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -187,6 +187,9 @@ static int hw_ep_get_halt(struct ci_hdrc *ci, int num, int dir)
 static int hw_test_and_clear_setup_status(struct ci_hdrc *ci, int n)
 {
 	n = ep_to_bit(ci, n);
+	if (n > 15)
+		return 0;
+
 	return hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(n));
 }