mptcp: relax check on MPC passive fallback

[platform/kernel/linux-starfive.git] / net / mptcp / subflow.c

diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 70b7a47..d3c5ecf 100644 (file)
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -783,7 +783,8 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
                 * options.
                 */
                mptcp_get_options(skb, &mp_opt);
-               if (!(mp_opt.suboptions & OPTION_MPTCP_MPC_ACK))
+               if (!(mp_opt.suboptions &
+                     (OPTION_MPTCP_MPC_SYN | OPTION_MPTCP_MPC_ACK)))
                        fallback = true;
 
        } else if (subflow_req->mp_join) {