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authorKevin Groeneveld <kgroeneveld@gmail.com>2012-07-21 06:30:50 +0000
committerDavid S. Miller <davem@davemloft.net>2012-07-22 12:12:32 -0700
commite3906486f616da7cc086a3ba06c0df4e5a48b4ab (patch)
tree573b6a99cf6f1e2958c59223d2e77ebe36e71ffa /drivers/net/virtio_net.c
parent0980e56e506b1e45022fad00bca8c8a974fda4e6 (diff)
downloadlinux-e3906486f616da7cc086a3ba06c0df4e5a48b4ab.tar.bz2
net: fix race condition in several drivers when reading stats
Fix race condition in several network drivers when reading stats on 32bit UP architectures. These drivers update their stats in a BH context and therefore should use u64_stats_fetch_begin_bh/u64_stats_fetch_retry_bh instead of u64_stats_fetch_begin/u64_stats_fetch_retry when reading the stats. Signed-off-by: Kevin Groeneveld <kgroeneveld@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/virtio_net.c')
-rw-r--r--drivers/net/virtio_net.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 1db445b2ecc7..83d2b0c34c5e 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -704,16 +704,16 @@ static struct rtnl_link_stats64 *virtnet_stats(struct net_device *dev,
u64 tpackets, tbytes, rpackets, rbytes;
do {
- start = u64_stats_fetch_begin(&stats->tx_syncp);
+ start = u64_stats_fetch_begin_bh(&stats->tx_syncp);
tpackets = stats->tx_packets;
tbytes = stats->tx_bytes;
- } while (u64_stats_fetch_retry(&stats->tx_syncp, start));
+ } while (u64_stats_fetch_retry_bh(&stats->tx_syncp, start));
do {
- start = u64_stats_fetch_begin(&stats->rx_syncp);
+ start = u64_stats_fetch_begin_bh(&stats->rx_syncp);
rpackets = stats->rx_packets;
rbytes = stats->rx_bytes;
- } while (u64_stats_fetch_retry(&stats->rx_syncp, start));
+ } while (u64_stats_fetch_retry_bh(&stats->rx_syncp, start));
tot->rx_packets += rpackets;
tot->tx_packets += tpackets;