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>
diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index 9d6a067..c260af5 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -63,10 +63,10 @@
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;
}