3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Junxiao Bi <[email protected]>

commit 3278bb748d2437eb1464765f36429e5d6aa91c38 upstream.

If lockres refresh failed, the super lock will never be released which
will cause some processes on other cluster nodes hung forever.

Signed-off-by: Junxiao Bi <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: Mark Fasheh <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 fs/ocfs2/dlmglue.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2539,6 +2539,7 @@ int ocfs2_super_lock(struct ocfs2_super
         * everything is up to the caller :) */
        status = ocfs2_should_refresh_lock_res(lockres);
        if (status < 0) {
+               ocfs2_cluster_unlock(osb, lockres, level);
                mlog_errno(status);
                goto bail;
        }
@@ -2547,8 +2548,10 @@ int ocfs2_super_lock(struct ocfs2_super
 
                ocfs2_complete_lock_res_refresh(lockres, status);
 
-               if (status < 0)
+               if (status < 0) {
+                       ocfs2_cluster_unlock(osb, lockres, level);
                        mlog_errno(status);
+               }
                ocfs2_track_lock_refresh(lockres);
        }
 bail:


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