[dpdk-stable] [PATCH] net/ena/base: fix doorbell evaluation for the LLQ case

[Marcin Wojtas]

Hi,

śr., 12 sie 2020 o 18:37 Artur Rojek <ar at semihalf.com> napisał(a):
>
> From: Michal Krawczyk <mk at semihalf.com>
>
> This patch adds a missing LLQ-related check in the
> ena_com_is_doorbell_needed() routine, which is relevant for the feature
> supported by the next generation HW of the ENA.
>
> Fixes: b2b02edeb0d6 ("net/ena/base: upgrade HAL for new HW features")
> CC: stable at dpdk.org
>
> Signed-off-by: Michal Krawczyk <mk at semihalf.com>
> [Extracted from a bigger patch]
> Signed-off-by: Artur Rojek <ar at semihalf.com>

Reviewed-by: Marcin Wojtas <mw at semihalf.com>

> ---
>  drivers/net/ena/base/ena_eth_com.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ena/base/ena_eth_com.h b/drivers/net/ena/base/ena_eth_com.h
> index e37b642d4..3d66237b8 100644
> --- a/drivers/net/ena/base/ena_eth_com.h
> +++ b/drivers/net/ena/base/ena_eth_com.h
> @@ -133,7 +133,8 @@ static inline bool ena_com_is_doorbell_needed(struct ena_com_io_sq *io_sq,
>         llq_info = &io_sq->llq_info;
>         num_descs = ena_tx_ctx->num_bufs;
>
> -       if (unlikely(ena_com_meta_desc_changed(io_sq, ena_tx_ctx)))
> +       if (llq_info->disable_meta_caching ||
> +           unlikely(ena_com_meta_desc_changed(io_sq, ena_tx_ctx)))
>                 ++num_descs;
>
>         if (num_descs > llq_info->descs_num_before_header) {
> --
> 2.28.0
>