diff --git a/net/mptcp/options.c b/net/mptcp/options.c index ecf41d52d2fc48d8e7ef73595e966ddea8196ef1..9486720c325663cc3258de4fcbafed05a30331ea 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -695,7 +695,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *sk, if (TCP_SKB_CB(skb)->seq != subflow->ssn_offset + 1) return subflow->mp_capable; - if (mp_opt->use_ack) { + if (mp_opt->dss && mp_opt->use_ack) { /* subflows are fully established as soon as we get any * additional ack. */