From 95d128420a70587ce2845df383ed9b6a165e58dc Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Sat, 12 Feb 2011 18:59:34 +0000
Subject: Fixed a problem in the USB-CDC demo.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2733 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 testhal/STM32/USB_CDC/main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'testhal/STM32/USB_CDC')

diff --git a/testhal/STM32/USB_CDC/main.c b/testhal/STM32/USB_CDC/main.c
index 0c2a3ac9d..6af497542 100644
--- a/testhal/STM32/USB_CDC/main.c
+++ b/testhal/STM32/USB_CDC/main.c
@@ -367,7 +367,8 @@ static msg_t Thread2(void *arg) {
       uint8_t buffer[0x40];
       size_t n = chIQReadTimeout(&sdup->iqueue, buffer,
                                  sizeof(buffer), TIME_IMMEDIATE);
-      chOQWriteTimeout(&sdup->oqueue, buffer, n, TIME_IMMEDIATE);
+      if (n > 0)
+        chOQWriteTimeout(&sdup->oqueue, buffer, n, TIME_IMMEDIATE);
     }
   }
 }
-- 
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