From e3906486f616da7cc086a3ba06c0df4e5a48b4ab Mon Sep 17 00:00:00 2001 From: Kevin Groeneveld Date: Sat, 21 Jul 2012 06:30:50 +0000 Subject: 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 Signed-off-by: David S. Miller --- net/bridge/br_device.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/bridge') diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index f4be1bbfef26..333484537600 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -127,9 +127,9 @@ static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev, const struct br_cpu_netstats *bstats = per_cpu_ptr(br->stats, cpu); do { - start = u64_stats_fetch_begin(&bstats->syncp); + start = u64_stats_fetch_begin_bh(&bstats->syncp); memcpy(&tmp, bstats, sizeof(tmp)); - } while (u64_stats_fetch_retry(&bstats->syncp, start)); + } while (u64_stats_fetch_retry_bh(&bstats->syncp, start)); sum.tx_bytes += tmp.tx_bytes; sum.tx_packets += tmp.tx_packets; sum.rx_bytes += tmp.rx_bytes; -- cgit v1.2.3