Re: [dpdk-dev] [PATCH] net/bnxt: fix max ring count calculation

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

On Fri, Apr 24, 2020 at 4:04 AM Somnath Kotur <somnath.kotur@broadcom.com>
wrote:

> Max Rx Ring count could be < Max stat contexts. While accounting
> for stat contexts, this should be also considered and
> the max ring count adjusted accordingly.
>
> Fixes: f03e66cb64ce ("net/bnxt: limit queue count for NS3/Stingray
> devices")
> Cc: stable@dpdk.org
>
> Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
>
Patch applied to dpdk-next-net-brcm.


> ---
>  drivers/net/bnxt/bnxt.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
> index 586d3f5..12fed1e 100644
> --- a/drivers/net/bnxt/bnxt.h
> +++ b/drivers/net/bnxt/bnxt.h
> @@ -653,10 +653,10 @@ struct bnxt {
>  #define MAX_STINGRAY_RINGS             128U
>  /* For sake of symmetry, max Tx rings == max Rx rings, one stat ctx for
> each */
>  #define BNXT_MAX_RX_RINGS(bp) \
> -       (BNXT_STINGRAY(bp) ? RTE_MIN(RTE_MIN(bp->max_rx_rings, \
> +       (BNXT_STINGRAY(bp) ? RTE_MIN(RTE_MIN(bp->max_rx_rings / 2U, \
>                                              MAX_STINGRAY_RINGS), \
>                                      bp->max_stat_ctx / 2U) : \
> -                               RTE_MIN(bp->max_rx_rings, \
> +                               RTE_MIN(bp->max_rx_rings / 2U, \
>                                         bp->max_stat_ctx / 2U))
>  #define BNXT_MAX_TX_RINGS(bp) \
>         (RTE_MIN((bp)->max_tx_rings, BNXT_MAX_RX_RINGS(bp)))
> --
> 1.8.3.1
>
>