diff options
| author | Brice Goglin | 2009-04-16 02:23:56 +0000 |
|---|---|---|
| committer | David S. Miller | 2009-04-16 18:00:43 -0700 |
| commit | 590818250684d18bb0e30c45d79971dcdff96ad0 (patch) | |
| tree | 74569b7dc4061819495b00ac4321a30f78791dad | |
| parent | a54bfa40fd16aeb90bc556189221576f746f8567 (diff) | |
myri10ge: force stats update in ethtool gstats
Force a statistics update when our ethtool gstats routine
is called. Otherwise, ethtool will continue to read stale
stats until something forces an update by reading /proc/net/dev
This requires putting a lock around the stats update to guard
against 2 threads (one via ethtool, and one via procfs)
updating the stats at once.
Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/myri10ge/myri10ge.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c index f2c4a665e93f..a833cdd85466 100644 --- a/drivers/net/myri10ge/myri10ge.c +++ b/drivers/net/myri10ge/myri10ge.c @@ -361,6 +361,8 @@ static inline void put_be32(__be32 val, __be32 __iomem * p) __raw_writel((__force __u32) val, (__force void __iomem *)p); } +static struct net_device_stats *myri10ge_get_stats(struct net_device *dev); + static int myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd, struct myri10ge_cmd *data, int atomic) @@ -1803,6 +1805,8 @@ myri10ge_get_ethtool_stats(struct net_device *netdev, int slice; int i; + /* force stats update */ + (void)myri10ge_get_stats(netdev); for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++) data[i] = ((unsigned long *)&mgp->stats)[i]; @@ -2969,6 +2973,7 @@ static struct net_device_stats *myri10ge_get_stats(struct net_device *dev) struct net_device_stats *stats = &mgp->stats; int i; + spin_lock(&mgp->stats_lock); memset(stats, 0, sizeof(*stats)); for (i = 0; i < mgp->num_slices; i++) { slice_stats = &mgp->ss[i].stats; @@ -2979,6 +2984,7 @@ static struct net_device_stats *myri10ge_get_stats(struct net_device *dev) stats->rx_dropped += slice_stats->rx_dropped; stats->tx_dropped += slice_stats->tx_dropped; } + spin_unlock(&mgp->stats_lock); return stats; } @@ -3902,6 +3908,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent) setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer, (unsigned long)mgp); + spin_lock_init(&mgp->stats_lock); SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops); INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog); status = register_netdev(netdev); |