nfsd4: re-probe callback on connection loss

This makes sure we set the sequence flag when necessary.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 15bd1cc..b24f19d 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -642,7 +642,7 @@
 		free_conn(c);
 	}
 	spin_unlock(&clp->cl_lock);
-	/* XXX: mark callback for update, probe callback */
+	nfsd4_probe_callback(clp);
 }
 
 static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)