D31499.diff
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	Index: sys/dev/e1000/if_em.c
	===================================================================
	--- sys/dev/e1000/if_em.c
	+++ sys/dev/e1000/if_em.c
	@@ -3268,15 +3268,17 @@
	} else
	rxcsum &= ~E1000_RXCSUM_TUOFL;

	- E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
	-
	if (adapter->rx_num_queues > 1) {
	if (hw->mac.type >= igb_mac_min)
	igb_initialize_rss_mapping(adapter);
	else
	em_initialize_rss_mapping(adapter);
	+
	+ rxcsum \|= E1000_RXCSUM_PCSD;
	}

	+ E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
	+
	/*
	* XXX TEMPORARY WORKAROUND: on some systems with 82573
	* long latencies are observed, like Lenovo X60. This