D17801.id49882.diff
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D17801.id49882.diff
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	Index: sys/net/iflib.c
	===================================================================
	--- sys/net/iflib.c
	+++ sys/net/iflib.c
	@@ -3030,6 +3030,10 @@
	if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL))
	return (ENOMEM);
	}
	+ /*
	+ * TSO always requires hardware checksum offload.
	+ */
	+ pi->ipi_csum_flags \|= CSUM_IP_TCP;
	pi->ipi_tcp_hflags = th->th_flags;
	pi->ipi_tcp_hlen = th->th_off << 2;
	pi->ipi_tcp_seq = th->th_seq;
	@@ -3038,9 +3042,7 @@
	if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP))
	return (ENXIO);
	/*
	- * The corresponding flag is set by the stack in the IPv4
	- * TSO case, but not in IPv6 (at least in FreeBSD 10.2).
	- * So, set it here because the rest of the flow requires it.
	+ * TSO always requires hardware checksum offload.
	*/
	pi->ipi_csum_flags \|= CSUM_IP6_TCP;
	th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0);