| Message ID | 20240201154219.607338-2-maciej.fijalkowski@intel.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | i40e: disable XDP Tx queues on ifdown | expand |
On Thu, Feb 01, 2024 at 04:42:18PM +0100, Maciej Fijalkowski wrote: > Currently, when interface is being brought down and > i40e_vsi_stop_rings() is called, i40e_pf_rxq_wait() is called two times, > which is wrong. To showcase this scenario, simplified call stack looks > as follows: > > i40e_vsi_stop_rings() > i40e_control wait rx_q() > i40e_control_rx_q() > i40e_pf_rxq_wait() > i40e_vsi_wait_queues_disabled() > i40e_pf_rxq_wait() // redundant call > > To fix this, let us s/i40e_control_wait_rx_q/i40e_control_rx_q within > i40e_vsi_stop_rings(). > > Fixes: 65662a8dcdd0 ("i40e: Fix logic of disabling queues") > Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Reviewed-by: Simon Horman <horms@kernel.org>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 6e7fd473abfd..2c46a5e7d222 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -4926,7 +4926,7 @@ int i40e_vsi_start_rings(struct i40e_vsi *vsi) void i40e_vsi_stop_rings(struct i40e_vsi *vsi) { struct i40e_pf *pf = vsi->back; - int pf_q, err, q_end; + int pf_q, q_end; /* When port TX is suspended, don't wait */ if (test_bit(__I40E_PORT_SUSPENDED, vsi->back->state)) @@ -4936,16 +4936,10 @@ void i40e_vsi_stop_rings(struct i40e_vsi *vsi) for (pf_q = vsi->base_queue; pf_q < q_end; pf_q++) i40e_pre_tx_queue_cfg(&pf->hw, (u32)pf_q, false); - for (pf_q = vsi->base_queue; pf_q < q_end; pf_q++) { - err = i40e_control_wait_rx_q(pf, pf_q, false); - if (err) - dev_info(&pf->pdev->dev, - "VSI seid %d Rx ring %d disable timeout\n", - vsi->seid, pf_q); - } + for (pf_q = vsi->base_queue; pf_q < q_end; pf_q++) + i40e_control_rx_q(pf, pf_q, false); msleep(I40E_DISABLE_TX_GAP_MSEC); - pf_q = vsi->base_queue; for (pf_q = vsi->base_queue; pf_q < q_end; pf_q++) wr32(&pf->hw, I40E_QTX_ENA(pf_q), 0);
Currently, when interface is being brought down and i40e_vsi_stop_rings() is called, i40e_pf_rxq_wait() is called two times, which is wrong. To showcase this scenario, simplified call stack looks as follows: i40e_vsi_stop_rings() i40e_control wait rx_q() i40e_control_rx_q() i40e_pf_rxq_wait() i40e_vsi_wait_queues_disabled() i40e_pf_rxq_wait() // redundant call To fix this, let us s/i40e_control_wait_rx_q/i40e_control_rx_q within i40e_vsi_stop_rings(). Fixes: 65662a8dcdd0 ("i40e: Fix logic of disabling queues") Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> --- drivers/net/ethernet/intel/i40e/i40e_main.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-)