From b0b737b42a14982a1f928e408ba7eadc3f474d04 Mon Sep 17 00:00:00 2001
From: "William D. Jones" <thor0505@comcast.net>
Date: Wed, 2 Oct 2019 23:02:55 -0400
Subject: [PATCH] usbd_control.c: Decide whether a control transfer has a data
 stage based on setup packet wLength.

---
 src/device/usbd_control.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/device/usbd_control.c b/src/device/usbd_control.c
index eed933f68..69ab47b4d 100644
--- a/src/device/usbd_control.c
+++ b/src/device/usbd_control.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * The MIT License (MIT)
  *
  * Copyright (c) 2019 Ha Thach (tinyusb.org)
@@ -94,7 +94,7 @@ bool tud_control_xfer(uint8_t rhport, tusb_control_request_t const * request, vo
   _control_state.total_len = tu_min16(len, request->wLength);
   _control_state.total_transferred = 0;
 
-  if ( len )
+  if ( _control_state.total_len )
   {
     TU_ASSERT(buffer);