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| author | Kevin Groeneveld <kgroeneveld@gmail.com> | 2012-07-21 06:30:50 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-22 12:12:32 -0700 |
| commit | e3906486f616da7cc086a3ba06c0df4e5a48b4ab (patch) | |
| tree | 573b6a99cf6f1e2958c59223d2e77ebe36e71ffa /drivers/net/loopback.c | |
| parent | 0980e56e506b1e45022fad00bca8c8a974fda4e6 (diff) | |
| download | linux-e3906486f616da7cc086a3ba06c0df4e5a48b4ab.tar.gz linux-e3906486f616da7cc086a3ba06c0df4e5a48b4ab.tar.bz2 linux-e3906486f616da7cc086a3ba06c0df4e5a48b4ab.zip | |
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>
Diffstat (limited to 'drivers/net/loopback.c')
| -rw-r--r-- | drivers/net/loopback.c | 4 |
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; } |