nfsd: adjust WARN_ON_ONCE in revoke_delegation

A WARN_ON_ONCE() is added to revoke delegations to make sure that the
state has been marked for revocation. However, that's only true for 4.1+
stateids. For 4.0 stateids, in unhash_delegation_locked() the sc_status
is set to SC_STATUS_CLOSED. Modify the check to reflect it, otherwise
a WARN_ON_ONCE is erronously triggered.

Signed-off-by: Olga Kornievskaia <[email protected]>
Signed-off-by: Chuck Lever <[email protected]>

Author: Olga Kornievskaia

fs/nfsd/nfs4state.c

@@ -1378,7 +1378,8 @@ static void revoke_delegation(struct nfs4_delegation *dp)
 	struct nfs4_client *clp = dp->dl_stid.sc_client;
 
 	WARN_ON(!list_empty(&dp->dl_recall_lru));
-	WARN_ON_ONCE(!(dp->dl_stid.sc_status &
+	WARN_ON_ONCE(dp->dl_stid.sc_client->cl_minorversion > 0 &&
+		     !(dp->dl_stid.sc_status &
 		     (SC_STATUS_REVOKED | SC_STATUS_ADMIN_REVOKED)));
 
 	trace_nfsd_stid_revoke(&dp->dl_stid);