Index: sys/dev/ixgbe/if_ix.c
===================================================================
--- sys/dev/ixgbe/if_ix.c	(revision 331766)
+++ sys/dev/ixgbe/if_ix.c	(working copy)
@@ -3567,6 +3567,8 @@
 
 	mtx_assert(&adapter->core_mtx, MA_OWNED);
 
+	msec_delay(1000);
+
 	INIT_DEBUGOUT("ixgbe_stop: begin\n");
 	ixgbe_disable_intr(adapter);
 	callout_stop(&adapter->timer);