From 3c462734bae0b627df504956cede30f60a4b6e20 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Mon, 14 May 2012 12:13:04 +0200
Subject: libblock: Fix purge device tree traversal

---
 cpukit/libblock/src/bdbuf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'cpukit/libblock/src/bdbuf.c')

diff --git a/cpukit/libblock/src/bdbuf.c b/cpukit/libblock/src/bdbuf.c
index ad1112b517..de2cebd7be 100644
--- a/cpukit/libblock/src/bdbuf.c
+++ b/cpukit/libblock/src/bdbuf.c
@@ -2853,7 +2853,8 @@ rtems_bdbuf_gather_for_purge (rtems_chain_control *purge_list,
     }
     else
     {
-      while (*prev != NULL && cur == (*prev)->avl.right)
+      while (*prev != NULL
+             && (cur == (*prev)->avl.right || (*prev)->avl.right == NULL))
       {
         /* Up */
         cur = *prev;
-- 
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