netdev - [PATCH net-next 2/7] sch_netem: clear old dist table when old qdisc's replaced

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Message-ID: <1392366970-11592-3-git-send-email-yangyingliang@huawei.com>
Date:	Fri, 14 Feb 2014 16:36:05 +0800
From:	Yang Yingliang <yangyingliang@...wei.com>
To:	<netdev@...r.kernel.org>
CC:	<davem@...emloft.net>, <stephen@...workplumber.org>
Subject: [PATCH net-next 2/7] sch_netem: clear old dist table when old qdisc's replaced

If we set a netem qdisc with dist table option, while we
use "#tc qdisc replace ..." that without dist table option
to replace the old qdisc, the old dist table is still there.
We need clear dist table after qdisc's replaced.

Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 net/sched/sch_netem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 6f2cc04..fd2206d 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -859,6 +859,9 @@ static int netem_change(struct Qdisc *sch, struct nlattr *opt)
 			q->loss_model = old_loss_model;
 			return ret;
 		}
+	} else {
+		dist_free(q->delay_dist);
+		q->delay_dist = NULL;
 	}
 
 	sch->limit = qopt->limit;
-- 
1.8.0


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