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authorYing Xue <ying.xue@windriver.com>2014-01-15 06:23:41 +0400
committerDavid S. Miller <davem@davemloft.net>2014-01-15 06:50:46 +0400
commit737639493032afec87fc9e8809f80878f74bd465 (patch)
treec45130aeceaee76e1a4ec7b20d092d1cb3afb1ce /drivers/net/vxlan.c
parentd4c5fba2f6c272ed687fe6351e5b20bc60cf24f0 (diff)
downloadlinux-737639493032afec87fc9e8809f80878f74bd465.tar.xz
vxlan: use __dev_get_by_index instead of dev_get_by_index to find interface
The following call chains indicate that vxlan_fdb_parse() is under rtnl_lock protection. So if we use __dev_get_by_index() instead of dev_get_by_index() to find interface handler in it, this would help us avoid to change interface reference counter. rtnetlink_rcv() rtnl_lock() netlink_rcv_skb() rtnl_fdb_add() vxlan_fdb_add() vxlan_fdb_parse() rtnl_unlock() rtnetlink_rcv() rtnl_lock() netlink_rcv_skb() rtnl_fdb_del() vxlan_fdb_del() vxlan_fdb_parse() rtnl_unlock() Cc: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Ying Xue <ying.xue@windriver.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxlan.c')
-rw-r--r--drivers/net/vxlan.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 481f85d604a4..8c40802e7dd9 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -741,10 +741,9 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
return -EINVAL;
*ifindex = nla_get_u32(tb[NDA_IFINDEX]);
- tdev = dev_get_by_index(net, *ifindex);
+ tdev = __dev_get_by_index(net, *ifindex);
if (!tdev)
return -EADDRNOTAVAIL;
- dev_put(tdev);
} else {
*ifindex = 0;
}