From c9e492ba1390cb6f3cb7d4e31b97cb5e291d96c2 Mon Sep 17 00:00:00 2001
From: Tristan Ye <tristan.ye@oracle.com>
Date: Fri, 10 Sep 2010 10:16:33 +0800
Subject: [PATCH] --- yaml --- r: 210970 b: refs/heads/master c:
 228ac6357718df2d5c8d70210fa51b2225aab5ee h: refs/heads/master v: v3

---
 [refs]                        | 2 +-
 trunk/fs/ocfs2/dlm/dlmdebug.c | 9 ++++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 9e3953331547..1608a4e4e9f3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0f4da216b8c3c35c90ecd18e1899c6f125957c2b
+refs/heads/master: 228ac6357718df2d5c8d70210fa51b2225aab5ee
diff --git a/trunk/fs/ocfs2/dlm/dlmdebug.c b/trunk/fs/ocfs2/dlm/dlmdebug.c
index 5efdd37dfe48..901ca52bf86b 100644
--- a/trunk/fs/ocfs2/dlm/dlmdebug.c
+++ b/trunk/fs/ocfs2/dlm/dlmdebug.c
@@ -636,8 +636,14 @@ static void *lockres_seq_start(struct seq_file *m, loff_t *pos)
 	spin_lock(&dlm->track_lock);
 	if (oldres)
 		track_list = &oldres->tracking;
-	else
+	else {
 		track_list = &dlm->tracking_list;
+		if (list_empty(track_list)) {
+			dl = NULL;
+			spin_unlock(&dlm->track_lock);
+			goto bail;
+		}
+	}
 
 	list_for_each_entry(res, track_list, tracking) {
 		if (&res->tracking == &dlm->tracking_list)
@@ -660,6 +666,7 @@ static void *lockres_seq_start(struct seq_file *m, loff_t *pos)
 	} else
 		dl = NULL;
 
+bail:
 	/* passed to seq_show */
 	return dl;
 }