datapath: Fix race.

[sliver-openvswitch.git] / datapath / datapath.c

diff --git a/datapath/datapath.c b/datapath/datapath.c
index d528ba0..edbbb88 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -1767,11 +1767,12 @@ static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
        int bucket = cb->args[0], skip = cb->args[1];
        int i, j = 0;
 
+       rcu_read_lock();
        dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
-       if (!dp)
+       if (!dp) {
+               rcu_read_unlock();
                return -ENODEV;
-
-       rcu_read_lock();
+       }
        for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
                struct vport *vport;