NFSv4: clp->cl_cons_state < 0 signifies an invalid nfs_client

If someone calls nfs_mark_client_ready(clp, status) with a negative
value for status, then that should signal that the nfs_client is no
longer valid.

Reviewed-by: Jeff Layton <[email protected]>
Reviewed-by: Benjamin Coddington <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>

Author: Trond Myklebust

fs/nfs/nfs4state.c

@@ -1403,7 +1403,7 @@ int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_
 	dprintk("%s: scheduling stateid recovery for server %s\n", __func__,
 			clp->cl_hostname);
 	nfs4_schedule_state_manager(clp);
-	return 0;
+	return clp->cl_cons_state < 0 ? clp->cl_cons_state : 0;
 }
 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery);