Re: [dpdk-dev] [PATCH v2] net/i40e: fix port segmentation fault when restart

["Zhang, Qi Z" <qi.z.zhang@intel.com>]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Wei Zhao
> Sent: Wednesday, November 15, 2017 1:55 PM
> To: dev@dpdk.org
> Cc: Zhao1, Wei <wei.zhao1@intel.com>
> Subject: [dpdk-dev] [PATCH v2] net/i40e: fix port segmentation fault when
> restart
> 
> It will clear all queue region related configuration when dev stop even if threr

s/threr/there

> is no queue region config, so this may cause error. So add check when flush
> queue region config and delete it when device stop.
> 
> Fixes: 7cbecc2f742 ("net/i40e: support queue region set and flush")
> 
> Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
> 
> ---
> 
> v2:
> -fix patch check warning.
> ---
>  drivers/net/i40e/i40e_ethdev.c  |  3 ---
> drivers/net/i40e/rte_pmd_i40e.c | 27 ++++++++++++++-------------
>  2 files changed, 14 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index 811cc9f..7a1290b 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -2154,9 +2154,6 @@ i40e_dev_stop(struct rte_eth_dev *dev)
>  	/* reset hierarchy commit */
>  	pf->tm_conf.committed = false;
> 
> -	/* Remove all the queue region configuration */
> -	i40e_flush_queue_region_all_conf(dev, hw, pf, 0);
> -
>From the commit log, the reason you remove above line is because the function can't handle the situation when no queue region config, 
but what about the case that queue region config does exist? Could you add more message to explain why this not be impacted.

>  	hw->adapter_stopped = 1;
>  }
> 
> diff --git a/drivers/net/i40e/rte_pmd_i40e.c
> b/drivers/net/i40e/rte_pmd_i40e.c index aeb92af..c2e2466 100644
> --- a/drivers/net/i40e/rte_pmd_i40e.c
> +++ b/drivers/net/i40e/rte_pmd_i40e.c
> @@ -2845,22 +2845,23 @@ i40e_flush_queue_region_all_conf(struct
> rte_eth_dev *dev,
>  		return 0;
>  	}
> 
> -	info->queue_region_number = 1;
> -	info->region[0].queue_num = main_vsi->nb_used_qps;
> -	info->region[0].queue_start_index = 0;
> +	if (info->queue_region_number) {
> +		info->queue_region_number = 1;
> +		info->region[0].queue_num = main_vsi->nb_used_qps;
> +		info->region[0].queue_start_index = 0;
> 
> -	ret = i40e_vsi_update_queue_region_mapping(hw, pf);
> -	if (ret != I40E_SUCCESS)
> -		PMD_DRV_LOG(INFO, "Failed to flush queue region mapping.");
> -
> -	ret = i40e_dcb_init_configure(dev, TRUE);
> -	if (ret != I40E_SUCCESS) {
> -		PMD_DRV_LOG(INFO, "Failed to flush dcb.");
> -		pf->flags &= ~I40E_FLAG_DCB;
> -	}
> +		ret = i40e_vsi_update_queue_region_mapping(hw, pf);
> +		if (ret != I40E_SUCCESS)
> +			PMD_DRV_LOG(INFO, "Failed to flush queue region
> mapping.");

WARNING: line over 80 characters

Regards
Qi

> 
> -	i40e_init_queue_region_conf(dev);
> +		ret = i40e_dcb_init_configure(dev, TRUE);
> +		if (ret != I40E_SUCCESS) {
> +			PMD_DRV_LOG(INFO, "Failed to flush dcb.");
> +			pf->flags &= ~I40E_FLAG_DCB;
> +		}
> 
> +		i40e_init_queue_region_conf(dev);
> +	}
>  	return 0;
>  }
> 
> --
> 2.7.4