Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[deliverable/linux.git] / net / ipv6 / ip6_tunnel.c

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 02894216a46d5f594ab73b11ef6a44cd0712f292..1e5e2404f1af51c4d230ac91817bb5805f62b856 100644 (file)
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -101,17 +101,26 @@ struct ip6_tnl_net {
 
 static struct net_device_stats *ip6_get_stats(struct net_device *dev)
 {
-       struct pcpu_sw_netstats sum = { 0 };
+       struct pcpu_sw_netstats tmp, sum = { 0 };
        int i;
 
        for_each_possible_cpu(i) {
+               unsigned int start;
                const struct pcpu_sw_netstats *tstats =
                                                   per_cpu_ptr(dev->tstats, i);
 
-               sum.rx_packets += tstats->rx_packets;
-               sum.rx_bytes   += tstats->rx_bytes;
-               sum.tx_packets += tstats->tx_packets;
-               sum.tx_bytes   += tstats->tx_bytes;
+               do {
+                       start = u64_stats_fetch_begin_bh(&tstats->syncp);
+                       tmp.rx_packets = tstats->rx_packets;
+                       tmp.rx_bytes = tstats->rx_bytes;
+                       tmp.tx_packets = tstats->tx_packets;
+                       tmp.tx_bytes =  tstats->tx_bytes;
+               } while (u64_stats_fetch_retry_bh(&tstats->syncp, start));
+
+               sum.rx_packets += tmp.rx_packets;
+               sum.rx_bytes   += tmp.rx_bytes;
+               sum.tx_packets += tmp.tx_packets;
+               sum.tx_bytes   += tmp.tx_bytes;
        }
        dev->stats.rx_packets = sum.rx_packets;
        dev->stats.rx_bytes   = sum.rx_bytes;
@@ -823,8 +832,10 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
                }
 
                tstats = this_cpu_ptr(t->dev->tstats);
+               u64_stats_update_begin(&tstats->syncp);
                tstats->rx_packets++;
                tstats->rx_bytes += skb->len;
+               u64_stats_update_end(&tstats->syncp);
 
                netif_rx(skb);