Re: [dpdk-stable] [dpdk-dev] [PATCH] net/ice: fix initialization of RSS look-up table

["Xie, WeiX" <weix.xie@intel.com>]

Tested-by:  Xie,WeiX < weix.xie@intel.com>

Regards,
Xie Wei


> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Zhang,Alvin
> Sent: Friday, January 8, 2021 3:29 PM
> To: Zhang, Qi Z <qi.z.zhang@intel.com>
> Cc: dev@dpdk.org; Zhang, AlvinX <alvinx.zhang@intel.com>;
> stable@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/ice: fix initialization of RSS look-up table
> 
> From: Alvin Zhang <alvinx.zhang@intel.com>
> 
> RSS look-up table initialization is done incorrectly due to divide-by-zero error.
> Add a check to rx-queue count.
> 
> Fixes: 50370662b727 ("net/ice: support device and queue ops")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Alvin Zhang <alvinx.zhang@intel.com>
> ---
>  drivers/net/ice/ice_ethdev.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
> index 9a5d6a5..9cef73e 100644
> --- a/drivers/net/ice/ice_ethdev.c
> +++ b/drivers/net/ice/ice_ethdev.c
> @@ -3268,10 +3268,12 @@ static int ice_init_rss(struct ice_pf *pf)
>  	if (dev->data->dev_conf.rxmode.mq_mode &
> ETH_MQ_RX_RSS_FLAG)
>  		dev->data->dev_conf.rxmode.offloads |=
> DEV_RX_OFFLOAD_RSS_HASH;
> 
> -	ret = ice_init_rss(pf);
> -	if (ret) {
> -		PMD_DRV_LOG(ERR, "Failed to enable rss for PF");
> -		return ret;
> +	if (dev->data->nb_rx_queues) {
> +		ret = ice_init_rss(pf);
> +		if (ret) {
> +			PMD_DRV_LOG(ERR, "Failed to enable rss for PF");
> +			return ret;
> +		}
>  	}
> 
>  	return 0;
> --
> 1.8.3.1