From 5a21a402e5d59b2704ce5abd8e02b4069ba126d8 Mon Sep 17 00:00:00 2001
From: zec <zec@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Date: Tue, 19 Jul 2011 11:04:58 +0000
Subject: [PATCH] MFC r224107:   Clear pending ifnet events, in an attempt at
 preventing   ng_ether_link_state() from being dispatched after we have  
 cleared our IFP2NG(ifp).

git-svn-id: svn://svn.freebsd.org/base/stable/8@224215 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
---
 sys/netgraph/ng_ether.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/netgraph/ng_ether.c b/sys/netgraph/ng_ether.c
index 5abc5aaeb..e124308f3 100644
--- a/sys/netgraph/ng_ether.c
+++ b/sys/netgraph/ng_ether.c
@@ -55,6 +55,7 @@
 #include <sys/proc.h>
 #include <sys/syslog.h>
 #include <sys/socket.h>
+#include <sys/taskqueue.h>
 
 #include <net/if.h>
 #include <net/if_dl.h>
@@ -336,6 +337,7 @@ ng_ether_detach(struct ifnet *ifp)
 	const node_p node = IFP2NG(ifp);
 	const priv_p priv = NG_NODE_PRIVATE(node);
 
+	taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
 	NG_NODE_REALLY_DIE(node);	/* Force real removal of node */
 	/*
 	 * We can't assume the ifnet is still around when we run shutdown
-- 
2.45.0