[dpdk-stable] [PATCH] net/i40e: fix error when create two RSS flow rule

[Zhao1, Wei]

Tested-by: Li WenjieX <wenjiex.a.li at intel.com>

> -----Original Message-----
> From: Zhao1, Wei
> Sent: Thursday, May 9, 2019 11:00 AM
> To: dev at dpdk.org
> Cc: stable at dpdk.org; Zhang, Qi Z <qi.z.zhang at intel.com>; Peng, Yuan
> <yuan.peng at intel.com>; Zhao1, Wei <wei.zhao1 at intel.com>
> Subject: [PATCH] net/i40e: fix error when create two RSS flow rule
> 
> There is need to refuse to create the second RSS flow rule as only one RSS key
> and HASH register for each PF port.
> Users should delete the first rule before setup the second rule.
> 
> Fixes: ecad87d22383 ("net/i40e: move RSS to flow API")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Wei Zhao <wei.zhao1 at intel.com>
> ---
>  drivers/net/i40e/i40e_flow.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/net/i40e/i40e_flow.c b/drivers/net/i40e/i40e_flow.c index
> 5447e4e..bca93b6 100644
> --- a/drivers/net/i40e/i40e_flow.c
> +++ b/drivers/net/i40e/i40e_flow.c
> @@ -4444,6 +4444,14 @@ i40e_flow_parse_rss_action(struct rte_eth_dev
> *dev,
>  		}
>  	}
> 
> +	if (rss_info->conf.queue_num) {
> +		rte_flow_error_set(error, EINVAL,
> +				RTE_FLOW_ERROR_TYPE_ACTION,
> +				act,
> +				"rss only allow one valid rule");
> +		return -rte_errno;
> +	}
> +
>  	/* Parse RSS related parameters from configuration */
>  	if (rss->func != RTE_ETH_HASH_FUNCTION_DEFAULT)
>  		return rte_flow_error_set
> --
> 2.7.5