Re: [dpdk-stable] [PATCH v3 1/2] net/i40e: fix segmentation fault in close

["Wu, Jingjing" <jingjing.wu@intel.com>]

> -----Original Message-----
> From: Iremonger, Bernard
> Sent: Thursday, January 12, 2017 9:58 PM
> To: dev@dpdk.org; Lu, Wenzhuo <wenzhuo.lu@intel.com>; Wu, Jingjing
> <jingjing.wu@intel.com>; Zhang, Helin <helin.zhang@intel.com>
> Cc: Iremonger, Bernard <bernard.iremonger@intel.com>; stable@dpdk.org
> Subject: [PATCH v3 1/2] net/i40e: fix segmentation fault in close
> 
> Change the order of releasing the vsi's.
> Release the vmdq vsi's first, then release the main vsi.
> 
> Fixes: 4861cde46116 ("i40e: new poll mode driver")
> 
> CC: stable@dpdk.org
> 
> Signed-off-by: Bernard Iremonger <bernard.iremonger@intel.com>
> ---
>  drivers/net/i40e/i40e_ethdev.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index f13e61b..e8cfec8 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -2068,18 +2068,17 @@ i40e_dev_close(struct rte_eth_dev *dev)
>  	/* shutdown and destroy the HMC */
>  	i40e_shutdown_lan_hmc(hw);
> 
> -	/* release all the existing VSIs and VEBs */
> -	i40e_fdir_teardown(pf);
> -	i40e_vsi_release(pf->main_vsi);
> -
>  	for (i = 0; i < pf->nb_cfg_vmdq_vsi; i++) {
>  		i40e_vsi_release(pf->vmdq[i].vsi);
>  		pf->vmdq[i].vsi = NULL;
>  	}
> -
>  	rte_free(pf->vmdq);
>  	pf->vmdq = NULL;
> 
> +	/* release all the existing VSIs and VEBs */
> +	i40e_fdir_teardown(pf);
> +	i40e_vsi_release(pf->main_vsi);
> +
>  	/* shutdown the adminq */
>  	i40e_aq_queue_shutdown(hw, true);
>  	i40e_shutdown_adminq(hw);
> @@ -4342,6 +4341,9 @@ i40e_vsi_release(struct i40e_vsi *vsi)
>  	if (!vsi)
>  		return I40E_SUCCESS;
> 
> +	if (!vsi->adapter)
> +		return I40E_ERR_BAD_PTR;
> +

The change looks fine to me.
Only minor comments like:
The dev_close is ethdev level ops, I40E_XX error code need to be replaced by 
The error code defined in ethedev level.