From b9808723183a856312e21a2bc1becab3dadb9f35 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Mon, 16 Mar 2015 10:13:55 +0000
Subject: [PATCH] Fixed bug #559.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7775 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/rt/include/chsys.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/os/rt/include/chsys.h b/os/rt/include/chsys.h
index af725f627..7cc6aca5c 100644
--- a/os/rt/include/chsys.h
+++ b/os/rt/include/chsys.h
@@ -317,7 +317,8 @@ static inline void chSysUnlock(void) {
      in a critical section not followed by a chSchResceduleS(), this means
      that the current thread has a lower priority than the next thread in
      the ready list.*/
-  chDbgAssert(ch.rlist.r_current->p_prio >= ch.rlist.r_queue.p_next->p_prio,
+  chDbgAssert((ch.rlist.r_queue.p_next == (thread_t *)&ch.rlist.r_queue) ||
+              (ch.rlist.r_current->p_prio >= ch.rlist.r_queue.p_next->p_prio),
               "priority violation, missing reschedule");
 
   port_unlock();