D21868.diff
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	Index: head/sys/dev/e1000/if_em.c
	===================================================================
	--- head/sys/dev/e1000/if_em.c
	+++ head/sys/dev/e1000/if_em.c
	@@ -3903,6 +3903,7 @@
	static void
	em_update_stats_counters(struct adapter *adapter)
	{
	+ u64 prev_xoffrxc = adapter->stats.xoffrxc;

	if(adapter->hw.phy.media_type == e1000_media_type_copper \|\|
	(E1000_READ_REG(&adapter->hw, E1000_STATUS) & E1000_STATUS_LU)) {
	@@ -3926,7 +3927,8 @@
	** For watchdog management we need to know if we have been
	** paused during the last interval, so capture that here.
	*/
	- adapter->shared->isc_pause_frames = adapter->stats.xoffrxc;
	+ if (adapter->stats.xoffrxc != prev_xoffrxc)
	+ adapter->shared->isc_pause_frames = 1;
	adapter->stats.xofftxc += E1000_READ_REG(&adapter->hw, E1000_XOFFTXC);
	adapter->stats.fcruc += E1000_READ_REG(&adapter->hw, E1000_FCRUC);
	adapter->stats.prc64 += E1000_READ_REG(&adapter->hw, E1000_PRC64);