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

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

From: Steven Whitehouse <[email protected]>

commit c2952d202f710d326ac36a8ea6bd216b20615ec8 upstream.

When withdraw occurs, we need to continue to allow unlocks of fcntl
locks to occur, however these will only be local, since the node has
withdrawn from the cluster. This prevents triggering a VFS level
bug trap due to locks remaining when a file is closed.

Signed-off-by: Steven Whitehouse <[email protected]>
Signed-off-by: Luis Henriques <[email protected]>
---
 fs/gfs2/file.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index a8a81d7..e756a62 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -900,8 +900,11 @@ static int gfs2_lock(struct file *file, int cmd, struct 
file_lock *fl)
                cmd = F_SETLK;
                fl->fl_type = F_UNLCK;
        }
-       if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+       if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) {
+               if (fl->fl_type == F_UNLCK)
+                       posix_lock_file_wait(file, fl);
                return -EIO;
+       }
        if (IS_GETLK(cmd))
                return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl);
        else if (fl->fl_type == F_UNLCK)
-- 
1.8.1.2

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