From 5af28de35342f630a91061e25cc976a01b7ca6c4 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Wed, 15 Jan 2014 10:23:44 +0800 Subject: [PATCH] can: use __dev_get_by_index instead of dev_get_by_index to find interface As cgw_create_job() is always under rtnl_lock protection, __dev_get_by_index() instead of dev_get_by_index() should be used to find interface handler in it having us avoid to change interface reference counter. Cc: Oliver Hartkopp Signed-off-by: Ying Xue Acked-by: Oliver Hartkopp Signed-off-by: David S. Miller --- net/can/gw.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/net/can/gw.c b/net/can/gw.c index 88c8a39c173d..ac31891967da 100644 --- a/net/can/gw.c +++ b/net/can/gw.c @@ -839,21 +839,21 @@ static int cgw_create_job(struct sk_buff *skb, struct nlmsghdr *nlh) if (!gwj->ccgw.src_idx || !gwj->ccgw.dst_idx) goto out; - gwj->src.dev = dev_get_by_index(&init_net, gwj->ccgw.src_idx); + gwj->src.dev = __dev_get_by_index(&init_net, gwj->ccgw.src_idx); if (!gwj->src.dev) goto out; if (gwj->src.dev->type != ARPHRD_CAN) - goto put_src_out; + goto out; - gwj->dst.dev = dev_get_by_index(&init_net, gwj->ccgw.dst_idx); + gwj->dst.dev = __dev_get_by_index(&init_net, gwj->ccgw.dst_idx); if (!gwj->dst.dev) - goto put_src_out; + goto out; if (gwj->dst.dev->type != ARPHRD_CAN) - goto put_src_dst_out; + goto out; gwj->limit_hops = limhops; @@ -862,11 +862,6 @@ static int cgw_create_job(struct sk_buff *skb, struct nlmsghdr *nlh) err = cgw_register_filter(gwj); if (!err) hlist_add_head_rcu(&gwj->list, &cgw_list); - -put_src_dst_out: - dev_put(gwj->dst.dev); -put_src_out: - dev_put(gwj->src.dev); out: if (err) kmem_cache_free(cgw_cache, gwj); -- 2.39.5