[added to the 4.1 stable tree] ocfs2/dlm: clear refmap bit of recovery lock while doing local recovery cleanup

From: xuejiufei <redacted>

This patch has been added to the 4.1 stable tree. If you have any
objections, please let us know.

===============

[ Upstream commit c95a51807b730e4681e2ecbdfd669ca52601959e ]

When recovery master down, dlm_do_local_recovery_cleanup() only remove
the $RECOVERY lock owned by dead node, but do not clear the refmap bit.
Which will make umount thread falling in dead loop migrating $RECOVERY
to the dead node.

Signed-off-by: xuejiufei <redacted>
Reviewed-by: Joseph Qi <redacted>
Cc: Mark Fasheh <redacted>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <redacted>
Cc: <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <redacted>
---
 fs/ocfs2/dlm/dlmrecovery.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 3d90ad7..f25ff5d 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c

@@ -2360,6 +2360,8 @@ static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node)
 						break;
 					}
 				}
+				dlm_lockres_clear_refmap_bit(dlm, res,
+						dead_node);
 				spin_unlock(&res->spinlock);
 				continue;
 			}

-- 
2.5.0