From 559b2185e90114d93f11bb910c0a6b96a17ca871 Mon Sep 17 00:00:00 2001
From: Ross Owen <ross@xmos.com>
Date: Tue, 17 Jan 2017 14:44:09 +0000
Subject: [PATCH] Fixed UAC1 build configs with no FB endpoint.

---
 module_usb_audio/usb_buffer/usb_buffer.xc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/module_usb_audio/usb_buffer/usb_buffer.xc b/module_usb_audio/usb_buffer/usb_buffer.xc
index c91d95ba..19e20585 100644
--- a/module_usb_audio/usb_buffer/usb_buffer.xc
+++ b/module_usb_audio/usb_buffer/usb_buffer.xc
@@ -258,9 +258,11 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in,
     XUD_SetReady_In(ep_hid, g_hidData, 1);
 #endif
 
-#if (AUDIO_CLASS == 1)
+#if (AUDIO_CLASS == 1) 
+#if (NUM_USB_CHAN_IN == 0) || defined (UAC_FORCE_FEEDBACK_EP)
     /* In UAC1 we dont use a stream start event (and we are always FS) so mark FB EP ready now */
     XUD_SetReady_In(ep_aud_fb, fb_clocks, 3);
+#endif
 #endif
 
     while(1)