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/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;
         }