D23364.id67290.diff
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	Index: sys/netinet/tcp_output.c
	===================================================================
	--- sys/netinet/tcp_output.c
	+++ sys/netinet/tcp_output.c
	@@ -1170,15 +1170,15 @@
	#endif
	ip->ip_tos \|= IPTOS_ECN_ECT0;
	TCPSTAT_INC(tcps_ecn_ect0);
	+ /*
	+ * Reply with proper ECN notifications.
	+ * Only set CWR on new data segments
	+ */
	+ if (tp->t_flags2 & TF2_ECN_SND_CWR) {
	+ flags \|= TH_CWR;
	+ tp->t_flags2 &= ~TF2_ECN_SND_CWR;
	+ }
	}
	-
	- /*
	- * Reply with proper ECN notifications.
	- */
	- if (tp->t_flags2 & TF2_ECN_SND_CWR) {
	- flags \|= TH_CWR;
	- tp->t_flags2 &= ~TF2_ECN_SND_CWR;
	- }
	if (tp->t_flags2 & TF2_ECN_SND_ECE)
	flags \|= TH_ECE;
	}