net/bnxt: fix to not bring link down during reset recovery

  From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>

Driver should not send the phy_cfg request to bring link down
during reset recovery. If the driver sends the phy_cfg request
in recovery process, then FW needs to re-establish the link which
in turn increases the recovery time based on PHY type and link partners.

Fixes: df6cd7c1f73a ("net/bnxt: handle reset notify async event from FW")
Cc: stable@dpdk.org

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
  

On Mon, Sep 21, 2020 at 10:41 PM Somnath Kotur <somnath.kotur@broadcom.com>
wrote:

> From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
>
> Driver should not send the phy_cfg request to bring link down
> during reset recovery. If the driver sends the phy_cfg request
> in recovery process, then FW needs to re-establish the link which
> in turn increases the recovery time based on PHY type and link partners.
>
> Fixes: df6cd7c1f73a ("net/bnxt: handle reset notify async event from FW")
> Cc: stable@dpdk.org
>
> Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
> Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
>
Patch applied to dpdk-next-net-brcm. Thanks


> ---
>  drivers/net/bnxt/bnxt_ethdev.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/bnxt/bnxt_ethdev.c
> b/drivers/net/bnxt/bnxt_ethdev.c
> index 05e9a6a..e0afaac 100644
> --- a/drivers/net/bnxt/bnxt_ethdev.c
> +++ b/drivers/net/bnxt/bnxt_ethdev.c
> @@ -1323,7 +1323,9 @@ static void bnxt_dev_stop_op(struct rte_eth_dev
> *eth_dev)
>
>         bnxt_cancel_fw_health_check(bp);
>
> -       bnxt_dev_set_link_down_op(eth_dev);
> +       /* Do not bring link down during reset recovery */
> +       if (!is_bnxt_in_error(bp))
> +               bnxt_dev_set_link_down_op(eth_dev);
>
>         /* Wait for link to be reset and the async notification to process.
>          * During reset recovery, there is no need to wait and
> @@ -4377,7 +4379,7 @@ static void bnxt_write_fw_reset_reg(struct bnxt *bp,
> uint32_t index)
>
>  static void bnxt_dev_cleanup(struct bnxt *bp)
>  {
> -       bnxt_set_hwrm_link_config(bp, false);
> +       bp->eth_dev->data->dev_link.link_status = 0;
>         bp->link_info->link_up = 0;
>         if (bp->eth_dev->data->dev_started)
>                 bnxt_dev_stop_op(bp->eth_dev);
> --
> 2.10.1
>
>