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>

1 files changed, 2 insertions, 2 deletions

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;