sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_DELAYED_SACK sockopt

A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_DELAYED_SACK sockopt.

Fixes: 9c5829e1 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_DELAYED_SACK sockopt")
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sctp/socket.c

@@ -2920,6 +2920,9 @@ static int sctp_setsockopt_delayed_ack(struct sock *sk,
 		return 0;
 	}
 
+	if (sctp_style(sk, TCP))
+		params.sack_assoc_id = SCTP_FUTURE_ASSOC;
+
 	if (params.sack_assoc_id == SCTP_FUTURE_ASSOC ||
 	    params.sack_assoc_id == SCTP_ALL_ASSOC) {
 		if (params.sack_delay) {