From 28172739f0a276eb8d6ca917b3974c2edb036da3 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 7 Jul 2010 14:58:56 -0700 Subject: net: fix 64 bit counters on 32 bit arches There is a small possibility that a reader gets incorrect values on 32 bit arches. SNMP applications could catch incorrect counters when a 32bit high part is changed by another stats consumer/provider. One way to solve this is to add a rtnl_link_stats64 param to all ndo_get_stats64() methods, and also add such a parameter to dev_get_stats(). Rule is that we are not allowed to use dev->stats64 as a temporary storage for 64bit stats, but a caller provided area (usually on stack) Old drivers (only providing get_stats() method) need no changes. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- drivers/net/sfc/ethtool.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/net/sfc/ethtool.c') diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c index 3b8b0a062749..fd19d6ab97a2 100644 --- a/drivers/net/sfc/ethtool.c +++ b/drivers/net/sfc/ethtool.c @@ -469,12 +469,13 @@ static void efx_ethtool_get_stats(struct net_device *net_dev, struct efx_mac_stats *mac_stats = &efx->mac_stats; struct efx_ethtool_stat *stat; struct efx_channel *channel; + struct rtnl_link_stats64 temp; int i; EFX_BUG_ON_PARANOID(stats->n_stats != EFX_ETHTOOL_NUM_STATS); /* Update MAC and NIC statistics */ - dev_get_stats(net_dev); + dev_get_stats(net_dev, &temp); /* Fill detailed statistics buffer */ for (i = 0; i < EFX_ETHTOOL_NUM_STATS; i++) { -- cgit v1.2.3