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>

4 files changed, 12 insertions, 12 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;
         }
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c b/drivers/net/ethernet/neterion/vxge/vxge-main.c
index 4e20c5f02712..de2190443510 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-main.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-main.c
@@ -3131,12 +3131,12 @@ vxge_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *net_stats)
                 u64 packets, bytes, multicast;
 
                 do {
-                        start = u64_stats_fetch_begin(&rxstats->syncp);
+                        start = u64_stats_fetch_begin_bh(&rxstats->syncp);
 
                         packets   = rxstats->rx_frms;
                         multicast = rxstats->rx_mcast;
                         bytes     = rxstats->rx_bytes;
-                } while (u64_stats_fetch_retry(&rxstats->syncp, start));
+                } while (u64_stats_fetch_retry_bh(&rxstats->syncp, start));
 
                 net_stats->rx_packets += packets;
                 net_stats->rx_bytes += bytes;
@@ -3146,11 +3146,11 @@ vxge_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *net_stats)
                 net_stats->rx_dropped += rxstats->rx_dropped;
 
                 do {
-                        start = u64_stats_fetch_begin(&txstats->syncp);
+                        start = u64_stats_fetch_begin_bh(&txstats->syncp);
 
                         packets = txstats->tx_frms;
                         bytes   = txstats->tx_bytes;
-                } while (u64_stats_fetch_retry(&txstats->syncp, start));
+                } while (u64_stats_fetch_retry_bh(&txstats->syncp, start));
 
                 net_stats->tx_packets += packets;
                 net_stats->tx_bytes += bytes;
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;
         }
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 1db445b2ecc7..83d2b0c34c5e 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -704,16 +704,16 @@ static struct rtnl_link_stats64 *virtnet_stats(struct net_device *dev,
                 u64 tpackets, tbytes, rpackets, rbytes;
 
                 do {
-                        start = u64_stats_fetch_begin(&stats->tx_syncp);
+                        start = u64_stats_fetch_begin_bh(&stats->tx_syncp);
                         tpackets = stats->tx_packets;
                         tbytes   = stats->tx_bytes;
-                } while (u64_stats_fetch_retry(&stats->tx_syncp, start));
+                } while (u64_stats_fetch_retry_bh(&stats->tx_syncp, start));
 
                 do {
-                        start = u64_stats_fetch_begin(&stats->rx_syncp);
+                        start = u64_stats_fetch_begin_bh(&stats->rx_syncp);
                         rpackets = stats->rx_packets;
                         rbytes   = stats->rx_bytes;
-                } while (u64_stats_fetch_retry(&stats->rx_syncp, start));
+                } while (u64_stats_fetch_retry_bh(&stats->rx_syncp, start));
 
                 tot->rx_packets += rpackets;
                 tot->tx_packets += tpackets;