netdev - [PATCH net-next] net: sched: route: don't set arg->stop in route4

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Message-Id: <20190215152100.8914-1-vladbu@mellanox.com>
Date:   Fri, 15 Feb 2019 17:21:00 +0200
From:   Vlad Buslov <vladbu@...lanox.com>
To:     netdev@...r.kernel.org
Cc:     idosch@...sch.org, jhs@...atatu.com, xiyou.wangcong@...il.com,
        jiri@...nulli.us, davem@...emloft.net,
        Vlad Buslov <vladbu@...lanox.com>
Subject: [PATCH net-next] net: sched: route: don't set arg->stop in route4_walk() when empty

Some classifiers set arg->stop in their implementation of tp->walk() API
when empty. Most of classifiers do not adhere to that convention. Do not
set arg->stop in route4_walk() to unify tp->walk() behavior among
classifier implementations.

Fixes: ed76f5edccc9 ("net: sched: protect filter_chain list with filter_chain_lock mutex")
Signed-off-by: Vlad Buslov <vladbu@...lanox.com>
---
 net/sched/cls_route.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/sched/cls_route.c b/net/sched/cls_route.c
index e590c3a2999d..444d15a75d98 100644
--- a/net/sched/cls_route.c
+++ b/net/sched/cls_route.c
@@ -567,10 +567,7 @@ static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg,
 	struct route4_head *head = rtnl_dereference(tp->root);
 	unsigned int h, h1;
 
-	if (head == NULL)
-		arg->stop = 1;
-
-	if (arg->stop)
+	if (head == NULL || arg->stop)
 		return;
 
 	for (h = 0; h <= 256; h++) {
-- 
2.13.6