--- zzzz-none-000/linux-4.1.52/net/ipv4/af_inet.c	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/net/ipv4/af_inet.c	2022-03-02 11:37:13.000000000 +0000
@@ -104,6 +104,9 @@
 #include <net/ip_fib.h>
 #include <net/inet_connection_sock.h>
 #include <net/tcp.h>
+#if defined(CONFIG_BCM_MPTCP) && defined(CONFIG_BCM_KF_MPTCP)
+#include <net/mptcp.h>
+#endif
 #include <net/udp.h>
 #include <net/udplite.h>
 #include <net/ping.h>
@@ -147,6 +150,11 @@
 		return;
 	}
 
+#if defined(CONFIG_BCM_MPTCP) && defined(CONFIG_BCM_KF_MPTCP)
+	if (sock_flag(sk, SOCK_MPTCP))
+		mptcp_disable_static_key();
+
+#endif
 	WARN_ON(atomic_read(&sk->sk_rmem_alloc));
 	WARN_ON(atomic_read(&sk->sk_wmem_alloc));
 	WARN_ON(sk->sk_wmem_queued);
@@ -248,8 +256,12 @@
  *	Create an inet socket.
  */
 
+#if !defined(CONFIG_BCM_MPTCP) || !defined(CONFIG_BCM_KF_MPTCP)
 static int inet_create(struct net *net, struct socket *sock, int protocol,
 		       int kern)
+#else
+int inet_create(struct net *net, struct socket *sock, int protocol, int kern)
+#endif
 {
 	struct sock *sk;
 	struct inet_protosw *answer;
@@ -675,6 +687,25 @@
 	lock_sock(sk2);
 
 	sock_rps_record_flow(sk2);
+#if defined(CONFIG_BCM_MPTCP) && defined(CONFIG_BCM_KF_MPTCP)
+
+	if (sk2->sk_protocol == IPPROTO_TCP && mptcp(tcp_sk(sk2))) {
+		struct sock *sk_it = sk2;
+
+		mptcp_for_each_sk(tcp_sk(sk2)->mpcb, sk_it)
+			sock_rps_record_flow(sk_it);
+
+		if (tcp_sk(sk2)->mpcb->master_sk) {
+			sk_it = tcp_sk(sk2)->mpcb->master_sk;
+
+			write_lock_bh(&sk_it->sk_callback_lock);
+			sk_it->sk_wq = newsock->wq;
+			sk_it->sk_socket = newsock;
+			write_unlock_bh(&sk_it->sk_callback_lock);
+		}
+	}
+
+#endif
 	WARN_ON(!((1 << sk2->sk_state) &
 		  (TCPF_ESTABLISHED | TCPF_SYN_RECV |
 		  TCPF_CLOSE_WAIT | TCPF_CLOSE)));
@@ -1787,6 +1818,11 @@
 
 	ip_init();
 
+#if defined(CONFIG_BCM_MPTCP) && defined(CONFIG_BCM_KF_MPTCP)
+	/* We must initialize MPTCP before TCP. */
+	mptcp_init();
+
+#endif
 	tcp_v4_init();
 
 	/* Setup TCP slab cache for open requests. */