Re: [PATCH] net/bnxt: fix autoneg on PAM4 links

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

On Wed, Nov 17, 2021 at 8:11 PM Somnath Kotur
<somnath.kotur@broadcom.com> wrote:
>
> If autonegotiation was enabled, driver was not passing the
> 'auto_pam4_link_speeds' obtained during init and stored in bp->link_info
> to bnxt_hwrm_port_phy_cfg(). This would result in an incorrect setting
> being passed to the HW during PHY configuration. This in turn, would
> result in invalid settings being retrieved and configured in subsequent
> application loads resulting in launch failures.
>
> Fixes: c23f9ded0391 ("net/bnxt: support 200G PAM4 link")
>
> Reported-by: Charlie Brtee <cfb@hpe.com>
> Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
> Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Merged in dpdk-next-net-brcm.

Fixed up typo in Charle's name.
Added Bugzilla ID and stable@dpdk.org

Thanks
Ajit

> ---
>  drivers/net/bnxt/bnxt_hwrm.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
> index 67ed807dad..df75047e2d 100644
> --- a/drivers/net/bnxt/bnxt_hwrm.c
> +++ b/drivers/net/bnxt/bnxt_hwrm.c
> @@ -3247,6 +3247,8 @@ int bnxt_set_hwrm_link_config(struct bnxt *bp, bool link_up)
>                 link_req.auto_link_speed_mask =
>                         bnxt_parse_eth_link_speed_mask(bp,
>                                                        dev_conf->link_speeds);
> +               link_req.auto_pam4_link_speeds =
> +                       bp->link_info->auto_pam4_link_speeds;
>         } else {
>                 if (bp->link_info->phy_type ==
>                     HWRM_PORT_PHY_QCFG_OUTPUT_PHY_TYPE_BASET ||
> --
> 2.28.0.497.g54e85e7
>