diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index b22a63ba2348ae..6e0188f5d3f385 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1316,11 +1316,12 @@ static void mptcp_copy_inaddrs(struct sock *msk, const struct sock *ssk)
 
 static int mptcp_disconnect(struct sock *sk, int flags)
 {
-	lock_sock(sk);
-	__mptcp_clear_xmit(sk);
-	release_sock(sk);
-	mptcp_cancel_work(sk);
-	return tcp_disconnect(sk, flags);
+	/* Should never be called.
+	 * inet_stream_connect() calls ->disconnect, but that
+	 * refers to the subflow socket, not the mptcp one.
+	 */
+	WARN_ON_ONCE(1);
+	return 0;
 }
 
 #if IS_ENABLED(CONFIG_MPTCP_IPV6)