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/loopback.c b/drivers/net/loopback.c
index 32eb94e..e2a06fd 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -107,10 +107,10 @@
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;
}