diff options
| author | Jakub Kicinski <kubakici@wp.pl> | 2014-03-15 14:55:00 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2014-03-28 06:54:01 -0700 |
| commit | 59c871c5f0540c974db85eaa77f518de26940c1f (patch) | |
| tree | 0dfcd92ddb191648b8cc2578ddade2e5dbdd7b92 /drivers/net/ethernet/intel/e1000e/netdev.c | |
| parent | 13c2884f155bc524c5e94482216030de480fea60 (diff) | |
e1000e: add timeout for TX HW time stamping work
Hardware may fail to report time stamp e.g.:
- when hardware time stamping is not enabled
- when time stamp is requested shortly after ifup
Timeout time stamp reading work to prevent it from
scheduling itself indefinitely. Report timeout events
via system log and device stats.
Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 6bd1832e3f3e..b8d252fcad18 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -1163,6 +1163,12 @@ static void e1000e_tx_hwtstamp_work(struct work_struct *work) skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps); dev_kfree_skb_any(adapter->tx_hwtstamp_skb); adapter->tx_hwtstamp_skb = NULL; + } else if (time_after(jiffies, adapter->tx_hwtstamp_start + + adapter->tx_timeout_factor * HZ)) { + dev_kfree_skb_any(adapter->tx_hwtstamp_skb); + adapter->tx_hwtstamp_skb = NULL; + adapter->tx_hwtstamp_timeouts++; + e_warn("clearing Tx timestamp hang"); } else { /* reschedule to check later */ schedule_work(&adapter->tx_hwtstamp_work); @@ -5567,6 +5573,7 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; tx_flags |= E1000_TX_FLAGS_HWTSTAMP; adapter->tx_hwtstamp_skb = skb_get(skb); + adapter->tx_hwtstamp_start = jiffies; schedule_work(&adapter->tx_hwtstamp_work); } else { skb_tx_timestamp(skb); |