diff options
| author | Jakub Kicinski <kubakici@wp.pl> | 2014-03-15 14:55:32 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2014-03-28 06:54:02 -0700 |
| commit | ed4420a3b412b09cc60d6e3d662428b7e6c36e90 (patch) | |
| tree | f7b57251f5948e2f4c1f6e9b35c2d0a77a3eae79 | |
| parent | afc835d1bda13923e3792d838dae1fa34c506b09 (diff) | |
| download | op-kernel-dev-ed4420a3b412b09cc60d6e3d662428b7e6c36e90.zip op-kernel-dev-ed4420a3b412b09cc60d6e3d662428b7e6c36e90.tar.gz | |
igb: fix race conditions on queuing skb for HW time stamp
igb has a single set of TX time stamping resources per NIC.
Use a simple bit lock to avoid race conditions and leaking skbs
when multiple TX rings try to claim time stamping.
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>
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb.h | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_ptp.c | 3 |
3 files changed, 7 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index 411b213..7fbe1e9 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h @@ -492,7 +492,8 @@ struct igb_adapter { enum e1000_state_t { __IGB_TESTING, __IGB_RESETTING, - __IGB_DOWN + __IGB_DOWN, + __IGB_PTP_TX_IN_PROGRESS, }; enum igb_boards { diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 1fdffa20..55fc559 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -4983,7 +4983,8 @@ netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb, if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) { struct igb_adapter *adapter = netdev_priv(tx_ring->netdev); - if (!(adapter->ptp_tx_skb)) { + if (!test_and_set_bit_lock(__IGB_PTP_TX_IN_PROGRESS, + &adapter->state)) { skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; tx_flags |= IGB_TX_FLAGS_TSTAMP; diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index da55fbb..2cca8fd 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -387,6 +387,7 @@ static void igb_ptp_tx_work(struct work_struct *work) IGB_PTP_TX_TIMEOUT)) { dev_kfree_skb_any(adapter->ptp_tx_skb); adapter->ptp_tx_skb = NULL; + clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); adapter->tx_hwtstamp_timeouts++; dev_warn(&adapter->pdev->dev, "clearing Tx timestamp hang"); return; @@ -480,6 +481,7 @@ static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter) skb_tstamp_tx(adapter->ptp_tx_skb, &shhwtstamps); dev_kfree_skb_any(adapter->ptp_tx_skb); adapter->ptp_tx_skb = NULL; + clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); } /** @@ -857,6 +859,7 @@ void igb_ptp_stop(struct igb_adapter *adapter) if (adapter->ptp_tx_skb) { dev_kfree_skb_any(adapter->ptp_tx_skb); adapter->ptp_tx_skb = NULL; + clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); } if (adapter->ptp_clock) { |
