Re: [dpdk-dev] [PATCH] net/netvsc: disable before changing RSS parameters

[Dexuan Cui <decui@microsoft.com>]

> From: Stephen Hemminger <stephen@networkplumber.org>
> Sent: Monday, November 25, 2019 9:13 AM
> To: dev@dpdk.org
> Cc: Stephen Hemminger <stephen@networkplumber.org>; stable@dpdk.org;
> Dexuan Cui <decui@microsoft.com>
> 
> In order to change RSS parameters, the host requires that RSS
> is disable first.
> 
> Fixes: 92d23a57cafe ("net/netvsc: support configuring RSS parameters")
> Cc: stable@dpdk.org
> Signed-off-by: Dexuan Cui <decui@microsoft.com>
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> ---
>  drivers/net/netvsc/hn_ethdev.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c
> index 164e9ad174a7..575780ee5f26 100644
> --- a/drivers/net/netvsc/hn_ethdev.c
> +++ b/drivers/net/netvsc/hn_ethdev.c
> @@ -291,6 +291,13 @@ static int hn_rss_reta_update(struct rte_eth_dev
> *dev,
>  			hv->rss_ind[i] = reta_conf[idx].reta[shift];
>  	}
> 
> +	err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
> +	if (err) {
> +		PMD_DRV_LOG(NOTICE,
> +			"rss disable failed");
> +		return err;
> +	}
> +
>  	err = hn_rndis_conf_rss(hv, 0);
>  	if (err) {
>  		PMD_DRV_LOG(NOTICE,
> @@ -578,6 +585,13 @@ static int hn_dev_configure(struct rte_eth_dev
> *dev)
>  			return err;
>  		}
> 
> +		err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
> +		if (err) {
> +			PMD_DRV_LOG(NOTICE,
> +				"rss disable failed");
> +			return err;
> +		}
> +
>  		err = hn_rndis_conf_rss(hv, 0);
>  		if (err) {
>  			PMD_DRV_LOG(NOTICE,
> --
> 2.20.1

Hi, Stephen,
I think the patch originally came from Donald Lee (I added him to "To").

IMO Donald's Signed-off-by should be added.

And, can you please change my Signed-off-by to Tested-by?

Thanks,
-- Dexuan