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| author | Sathya Perla <sathya.perla@emulex.com> | 2011-06-26 20:40:48 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-06-27 00:09:31 -0700 |
| commit | 6e53391cb4f9491182e7fbd280966ebe2aca07dc (patch) | |
| tree | d2e920a3b86e8d58903e051c98071da646eabb1e /drivers/net/benet/be_main.c | |
| parent | c6af9c406ceb3434281cf230938453931dcbab75 (diff) | |
| download | op-kernel-dev-6e53391cb4f9491182e7fbd280966ebe2aca07dc.zip op-kernel-dev-6e53391cb4f9491182e7fbd280966ebe2aca07dc.tar.gz | |
be2net: fix netdev_stats_update
Problem initially reproted and fixed by Eric Dumazet <eric.dumazet@gmail.com>
netdev_stats_update() resets netdev->stats and then accumulates stats from
various rings. This is wrong as stats readers can sometimes catch zero values.
Use temporary variables instead for accumulating per-ring values.
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/benet/be_main.c')
| -rw-r--r-- | drivers/net/benet/be_main.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c index c4f564c..5ca06b0 100644 --- a/drivers/net/benet/be_main.c +++ b/drivers/net/benet/be_main.c @@ -428,33 +428,38 @@ void netdev_stats_update(struct be_adapter *adapter) struct net_device_stats *dev_stats = &adapter->netdev->stats; struct be_rx_obj *rxo; struct be_tx_obj *txo; + unsigned long pkts = 0, bytes = 0, mcast = 0, drops = 0; int i; - memset(dev_stats, 0, sizeof(*dev_stats)); for_all_rx_queues(adapter, rxo, i) { - dev_stats->rx_packets += rx_stats(rxo)->rx_pkts; - dev_stats->rx_bytes += rx_stats(rxo)->rx_bytes; - dev_stats->multicast += rx_stats(rxo)->rx_mcast_pkts; + pkts += rx_stats(rxo)->rx_pkts; + bytes += rx_stats(rxo)->rx_bytes; + mcast += rx_stats(rxo)->rx_mcast_pkts; /* no space in linux buffers: best possible approximation */ if (adapter->generation == BE_GEN3) { if (!(lancer_chip(adapter))) { - struct be_erx_stats_v1 *erx_stats = + struct be_erx_stats_v1 *erx = be_erx_stats_from_cmd(adapter); - dev_stats->rx_dropped += - erx_stats->rx_drops_no_fragments[rxo->q.id]; + drops += erx->rx_drops_no_fragments[rxo->q.id]; } } else { - struct be_erx_stats_v0 *erx_stats = + struct be_erx_stats_v0 *erx = be_erx_stats_from_cmd(adapter); - dev_stats->rx_dropped += - erx_stats->rx_drops_no_fragments[rxo->q.id]; + drops += erx->rx_drops_no_fragments[rxo->q.id]; } } + dev_stats->rx_packets = pkts; + dev_stats->rx_bytes = bytes; + dev_stats->multicast = mcast; + dev_stats->rx_dropped = drops; + pkts = bytes = 0; for_all_tx_queues(adapter, txo, i) { - dev_stats->tx_packets += tx_stats(txo)->be_tx_pkts; - dev_stats->tx_bytes += tx_stats(txo)->be_tx_bytes; + pkts += tx_stats(txo)->be_tx_pkts; + bytes += tx_stats(txo)->be_tx_bytes; } + dev_stats->tx_packets = pkts; + dev_stats->tx_bytes = bytes; /* bad pkts received */ dev_stats->rx_errors = drvs->rx_crc_errors + |
