From b34b221d77b7fbe68e68830cf48bb33014e4b7df Mon Sep 17 00:00:00 2001
From: Ruslan Ermilov <ru@FreeBSD.org>
Date: Tue, 2 Aug 2005 08:44:45 +0000
Subject: [PATCH] Add missing ether_poll_deregister().  This is still not
 enough to kldunload/kldload without a panic.  The same (but worse) problem is
 also present in ixgb(4).

---
 sys/dev/em/if_em.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/dev/em/if_em.c b/sys/dev/em/if_em.c
index 5c6a796be7d..5cbafcd185b 100644
--- a/sys/dev/em/if_em.c
+++ b/sys/dev/em/if_em.c
@@ -1714,6 +1714,9 @@ em_stop(void *arg)
 	mtx_assert(&adapter->mtx, MA_OWNED);
 
 	INIT_DEBUGOUT("em_stop: begin");
+#ifdef DEVICE_POLLING
+	ether_poll_deregister(ifp);
+#endif
 	em_disable_intr(adapter);
 	em_reset_hw(&adapter->hw);
 	callout_stop(&adapter->timer);