diff options
| author | Alan Brady <alan.brady@intel.com> | 2018-10-29 21:27:21 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2018-11-14 21:56:34 +0300 |
| commit | d5585b7b6846a6d0f9517afe57be3843150719da (patch) | |
| tree | 319e38ef420619753b59fbb993014a8e89781752 /drivers/net/ethernet/intel | |
| parent | 7cd8eb0861981ad212ce4242a1870c4b5831ceff (diff) | |
| download | linux-d5585b7b6846a6d0f9517afe57be3843150719da.tar.xz | |
i40e: prevent overlapping tx_timeout recover
If a TX hang occurs, we attempt to recover by incrementally resetting.
If we're starved for CPU time, it's possible the reset doesn't actually
complete (or even fire) before another tx_timeout fires causing us to
fly through the different resets without actually doing them.
This adds a bit to set and check if a timeout recovery is already
pending and, if so, bail out of tx_timeout. The bit will get cleared at
the end of i40e_rebuild when reset is complete.
Signed-off-by: Alan Brady <alan.brady@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')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_main.c | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index cda37d7ae5d6..8de9085bba9e 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -122,6 +122,7 @@ enum i40e_state_t { __I40E_MDD_EVENT_PENDING, __I40E_VFLR_EVENT_PENDING, __I40E_RESET_RECOVERY_PENDING, + __I40E_TIMEOUT_RECOVERY_PENDING, __I40E_MISC_IRQ_REQUESTED, __I40E_RESET_INTR_RECEIVED, __I40E_REINIT_REQUESTED, diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index d4461eec26bd..47f0fdadbac9 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -338,6 +338,10 @@ static void i40e_tx_timeout(struct net_device *netdev) (pf->tx_timeout_last_recovery + netdev->watchdog_timeo))) return; /* don't do any new action before the next timeout */ + /* don't kick off another recovery if one is already pending */ + if (test_and_set_bit(__I40E_TIMEOUT_RECOVERY_PENDING, pf->state)) + return; + if (tx_ring) { head = i40e_get_head(tx_ring); /* Read interrupt register */ @@ -9631,6 +9635,7 @@ end_core_reset: clear_bit(__I40E_RESET_FAILED, pf->state); clear_recovery: clear_bit(__I40E_RESET_RECOVERY_PENDING, pf->state); + clear_bit(__I40E_TIMEOUT_RECOVERY_PENDING, pf->state); } /** |