diff options
| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2015-01-07 02:55:01 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-01-06 16:57:18 -0800 |
| commit | d91649f5b719cd9d69206af7b3c4b4f6645e3b1e (patch) | |
| tree | 6b6edb1dc70eabd8586d050610dce621464fb65c /drivers/net/ethernet/intel/i40e/i40e_txrx.h | |
| parent | 2abad79afa700e837cb4feed170141292e0720c0 (diff) | |
i40e: fix un-necessary Tx hangs
When the driver was polling with interrupts disabled the hardware
will occasionally not write back descriptors. This patch causes
the driver to detect this situation and force an interrupt to
fire which will flush the stuck descriptor. Does not conflict
with napi because if we are already polling the napi_schedule is
ignored. Additionally the extra interrupts are rate limited, so
don't cause a burden to the CPU.
Change-ID: Iba4616d2a71288672a5f08e4512e2704b97335e8
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_txrx.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index e60d3accb2e2..18b00231d2f1 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -241,6 +241,7 @@ struct i40e_ring { unsigned long last_rx_timestamp; bool ring_active; /* is ring online or not */ + bool arm_wb; /* do something to arm write back */ /* stats structs */ struct i40e_queue_stats stats; |