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

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

From: Trond Myklebust <[email protected]>

commit dbb21c25a35a71baf413f5176f028ee11b88cfbc upstream.

A server shouldn't normally return NFS4ERR_GRACE if the client holds a
delegation, since no conflicting lock reclaims can be granted, however
the spec does not require the server to grant the lock in this
instance.

Signed-off-by: Trond Myklebust <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 fs/nfs/nfs4proc.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5025,6 +5025,12 @@ int nfs4_lock_delegation_recall(struct n
                                nfs4_schedule_stateid_recovery(server, state);
                                err = 0;
                                goto out;
+                       case -NFS4ERR_DELAY:
+                       case -NFS4ERR_GRACE:
+                               set_bit(NFS_DELEGATED_STATE, &state->flags);
+                               ssleep(1);
+                               err = -EAGAIN;
+                               goto out;
                        case -ENOMEM:
                        case -NFS4ERR_DENIED:
                                /* kill_proc(fl->fl_pid, SIGLOST, 1); */


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