diff options
| author | Jacob Keller | 2017-05-03 19:29:04 +0200 |
|---|---|---|
| committer | Jeff Kirsher | 2017-06-14 01:11:48 +0200 |
| commit | 622a2ef538fb3ca8eccf49716aba8267d6e95a47 (patch) | |
| tree | 950e136b184d92bdd12d8508e48552e5fe53b581 /drivers/net/ethernet/intel/ixgbe/ixgbe.h | |
| parent | ixgbe: add statistic indicating number of skipped Tx timestamps (diff) | |
| download | kernel-qcow2-linux-622a2ef538fb3ca8eccf49716aba8267d6e95a47.tar.gz kernel-qcow2-linux-622a2ef538fb3ca8eccf49716aba8267d6e95a47.tar.xz kernel-qcow2-linux-622a2ef538fb3ca8eccf49716aba8267d6e95a47.zip | |
ixgbe: check for Tx timestamp timeouts during watchdog
The ixgbe driver has logic to handle only one Tx timestamp at a time,
using a state bit lock to avoid multiple requests at once.
It may be possible, if incredibly unlikely, that a Tx timestamp event is
requested but never completes. Since we use an interrupt scheme to
determine when the Tx timestamp occurred we would never clear the state
bit in this case.
Add an ixgbe_ptp_tx_hang() function similar to the already existing
ixgbe_ptp_rx_hang() function. This function runs in the watchdog routine
and makes sure we eventually recover from this case instead of
permanently disabling Tx timestamps.
Note: there is no currently known way to cause this without hacking the
driver code to force it.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe.h')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h index eb36106218ad..dd5578756ae0 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h @@ -961,6 +961,7 @@ void ixgbe_ptp_suspend(struct ixgbe_adapter *adapter); void ixgbe_ptp_stop(struct ixgbe_adapter *adapter); void ixgbe_ptp_overflow_check(struct ixgbe_adapter *adapter); void ixgbe_ptp_rx_hang(struct ixgbe_adapter *adapter); +void ixgbe_ptp_tx_hang(struct ixgbe_adapter *adapter); void ixgbe_ptp_rx_pktstamp(struct ixgbe_q_vector *, struct sk_buff *); void ixgbe_ptp_rx_rgtstamp(struct ixgbe_q_vector *, struct sk_buff *skb); static inline void ixgbe_ptp_rx_hwtstamp(struct ixgbe_ring *rx_ring, |