D52840.diff
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	diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c
	--- a/sys/netinet/tcp_syncache.c
	+++ b/sys/netinet/tcp_syncache.c
	@@ -122,7 +122,7 @@
	static void syncache_free(struct syncache *);
	static void syncache_insert(struct syncache , struct syncache_head );
	static int syncache_respond(struct syncache , const struct mbuf , int);
	-static int syncache_send_challenge_ack(struct syncache , struct mbuf );
	+static void syncache_send_challenge_ack(struct syncache , struct mbuf );
	static struct socket syncache_socket(struct syncache , struct socket *,
	struct mbuf *m);
	static void syncache_timeout(struct syncache sc, struct syncache_head sch,
	@@ -695,10 +695,7 @@
	"sending challenge ACK\n",
	s, __func__,
	th->th_seq, sc->sc_irs + 1, sc->sc_wnd);
	- if (syncache_send_challenge_ack(sc, m) != 0) {
	- syncache_drop(sc, sch);
	- TCPSTAT_INC(tcps_sc_dropped);
	- }
	+ syncache_send_challenge_ack(sc, m);
	}
	} else {
	if ((s = tcp_log_addrs(inc, th, NULL, NULL)))
	@@ -2061,22 +2058,16 @@
	return (error);
	}

	-static int
	+static void
	syncache_send_challenge_ack(struct syncache sc, struct mbuf m)
	{
	- int error;
	-
	if (tcp_challenge_ack_check(&sc->sc_challenge_ack_end,
	&sc->sc_challenge_ack_cnt)) {
	- error = syncache_respond(sc, m, TH_ACK);
	- if (error == 0) {
	+ if (syncache_respond(sc, m, TH_ACK) == 0) {
	TCPSTAT_INC(tcps_sndacks);
	TCPSTAT_INC(tcps_sndtotal);
	}
	- } else {
	- error = 0;
	}
	- return (error);
	}

	/*