[PATCH v2] net/nfp: advertise no support for keeping flow rules

[Ferruh Yigit]

On 2/3/2023 1:59 AM, Chaoyong He wrote:
> From: Peng Zhang <peng.zhang at corigine.com>
> 
> Explicitly clear the RTE_ETH_DEV_CAPA_FLOW_RULE_KEEP capability
> bit to match behavior of other PMDs. This was missed when first
> adding flow support for the NFP PMD.
> 
> Fixes: 30ecce522732 ("net/nfp: support flow API")
> Cc: chaoyong.he at corigine.com
> Cc: stable at dpdk.org
> 
> Signed-off-by: Peng Zhang <peng.zhang at corigine.com>
> Reviewed-by: Chaoyong He <chaoyong.he at corigine.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund at corigine.com>
> ---
> v2:
> * Fix the wrongly 'Reviewed-by' tag.
> ---
>  drivers/net/nfp/nfp_common.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/nfp/nfp_common.c b/drivers/net/nfp/nfp_common.c
> index 71711bfa22..5c191b01ef 100644
> --- a/drivers/net/nfp/nfp_common.c
> +++ b/drivers/net/nfp/nfp_common.c
> @@ -794,6 +794,7 @@ nfp_net_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
>  	dev_info->speed_capa = RTE_ETH_LINK_SPEED_1G | RTE_ETH_LINK_SPEED_10G |
>  			       RTE_ETH_LINK_SPEED_25G | RTE_ETH_LINK_SPEED_40G |
>  			       RTE_ETH_LINK_SPEED_50G | RTE_ETH_LINK_SPEED_100G;
> +	dev_info->dev_capa &= ~RTE_ETH_DEV_CAPA_FLOW_RULE_KEEP;
>  
>  	return 0;
>  }

Nack

Above code has no impact, it has been added to drivers to highlight this
feature to driver maintainers.

This feature is added to ethdev layer and requires driver support, but
driver maintainer may miss that this feature exists at all. With above
change driver maintainer can chose to remove that line meaning they are
aware but not prefer to support this feature or properly add support it.

For your case, no need to add it explicitly, if driver doesn't support
RTE_ETH_DEV_CAPA_FLOW_RULE_KEEP, no action is needed.