From 3c17bad7432c732d5b822cc31c5a041391449fd2 Mon Sep 17 00:00:00 2001
From: Jared Boone <jboone@earfeast.com>
Date: Sat, 13 Oct 2012 17:03:28 -0700
Subject: [PATCH] Stall USB endpoint if control request is not handled.

---
 firmware/usb_performance/usb_request.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/firmware/usb_performance/usb_request.c b/firmware/usb_performance/usb_request.c
index df6ae427..bfa4ea75 100644
--- a/firmware/usb_performance/usb_request.c
+++ b/firmware/usb_performance/usb_request.c
@@ -19,6 +19,7 @@
  * Boston, MA 02110-1301, USA.
  */
 
+#include "usb.h"
 #include "usb_request.h"
 
 #include <stdbool.h>
@@ -49,6 +50,9 @@ static void usb_request(
 	
 	if( handler ) {
 		handler(endpoint, stage);
+	} else {
+		// USB 2.0 section 9.2.7 "Request Error"
+		usb_endpoint_stall(endpoint);
 	}
 }