[dpdk-stable] [PATCH] net/i40evf: fix packet loss issue for X722

[Guo, Jia]

Acked-by: Jeff Guo <jia.guo at intel.com>

> -----Original Message-----
> From: Xing, Beilei <beilei.xing at intel.com>
> Sent: Wednesday, February 24, 2021 10:09 AM
> To: Guo, Jia <jia.guo at intel.com>
> Cc: dev at dpdk.org; Xing, Beilei <beilei.xing at intel.com>; stable at dpdk.org;
> Zhang, HengjianX <hengjianx.zhang at intel.com>
> Subject: [PATCH] net/i40evf: fix packet loss issue for X722
> 
> From: Beilei Xing <beilei.xing at intel.com>
> 
> When Tx queue number is more than Rx queue number, and RSS is enabled,
> there'll be packet loss with X722.
> The root cause is the lookup table is not configured correctly, since it uses
> VF's queue pair number but not Rx queue number.
> 
> Fixes: 2da3ba746795 ("net/i40e: fix VF runtime queues RSS config")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Beilei Xing <beilei.xing at intel.com>
> Signed-off-by: Hengjian Zhang <hengjianx.zhang at intel.com>
> ---
>  drivers/net/i40e/i40e_ethdev_vf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev_vf.c
> b/drivers/net/i40e/i40e_ethdev_vf.c
> index 2909b4d894..0c9bd8d2c6 100644
> --- a/drivers/net/i40e/i40e_ethdev_vf.c
> +++ b/drivers/net/i40e/i40e_ethdev_vf.c
> @@ -2746,7 +2746,7 @@ i40evf_config_rss(struct i40e_vf *vf)
>  		}
> 
>  		for (i = 0; i < rss_lut_size; i++)
> -			lut_info[i] = i % vf->num_queue_pairs;
> +			lut_info[i] = i % num;
> 
>  		ret = i40evf_set_rss_lut(&vf->vsi, lut_info,
>  					 rss_lut_size);
> --
> 2.26.2