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/loopback.c b/drivers/net/loopback.c
index 32eb94ece6c1..e2a06fd996d5 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -107,10 +107,10 @@ static struct rtnl_link_stats64 *loopback_get_stats64(struct net_device *dev,
 
                 lb_stats = per_cpu_ptr(dev->lstats, i);
                 do {
-                        start = u64_stats_fetch_begin(&lb_stats->syncp);
+                        start = u64_stats_fetch_begin_bh(&lb_stats->syncp);
                         tbytes = lb_stats->bytes;
                         tpackets = lb_stats->packets;
-                } while (u64_stats_fetch_retry(&lb_stats->syncp, start));
+                } while (u64_stats_fetch_retry_bh(&lb_stats->syncp, start));
                 bytes   += tbytes;
                 packets += tpackets;
         }