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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/dummy.c
parent0980e56e506b1e45022fad00bca8c8a974fda4e6 (diff)
downloadlinux-next-e3906486f616da7cc086a3ba06c0df4e5a48b4ab.tar.gz
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/dummy.c')
-rw-r--r--drivers/net/dummy.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index 9d6a0677466b..c260af5411d0 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -63,10 +63,10 @@ static struct rtnl_link_stats64 *dummy_get_stats64(struct net_device *dev,
dstats = per_cpu_ptr(dev->dstats, i);
do {
- start = u64_stats_fetch_begin(&dstats->syncp);
+ start = u64_stats_fetch_begin_bh(&dstats->syncp);
tbytes = dstats->tx_bytes;
tpackets = dstats->tx_packets;
- } while (u64_stats_fetch_retry(&dstats->syncp, start));
+ } while (u64_stats_fetch_retry_bh(&dstats->syncp, start));
stats->tx_bytes += tbytes;
stats->tx_packets += tpackets;
}