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authorYing Xue <ying.xue@windriver.com>2014-01-15 10:23:44 +0800
committerDavid S. Miller <davem@davemloft.net>2014-01-14 18:50:47 -0800
commit5af28de35342f630a91061e25cc976a01b7ca6c4 (patch)
tree6601cac6792af4d03ff3913f16fc73ecdbaa8c29
parenta74e9426948cce451af0433c69a120178948cb03 (diff)
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 <socketcan@hartkopp.net> Signed-off-by: Ying Xue <ying.xue@windriver.com> Acked-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/can/gw.c15
1 files 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);