[PATCH v4] net/i40e: fix the issue caused by PF and VF release order

[Zhang, Yuying]

Hi Ke,

Please update commit log.
LGTM.

> -----Original Message-----
> From: Zhang, Ke1X <ke1x.zhang at intel.com>
> Sent: Friday, July 15, 2022 5:04 PM
> To: thomas at monjalon.net; Zhang, Yuying <yuying.zhang at intel.com>; Xing,
> Beilei <beilei.xing at intel.com>; ferruh.yigit at xilinx.com; Zhou, YidingX
> <yidingx.zhou at intel.com>; dev at dpdk.org
> Cc: Zhang, Ke1X <ke1x.zhang at intel.com>; stable at dpdk.org
> Subject: [PATCH v4] net/i40e: fix the issue caused by PF and VF release order
> 
> A segmentation fault occurs when testpmd exit.
> 
> This is due to fetching the device name from PF, PF is freed firstly and then VF
> representor is called later.
> 
> This commit fixes the bug by fetching the device name from VF representor
> not PF.

instead of PF

> 
> Fixes: e391a7b7f815 ("net/i40e: fix multi-process shared data")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Ke Zhang <ke1x.zhang at intel.com>
Acked-by: Yuying Zhang <yuying.zhang at intel.com>

> 
> ---
> v4: Update the commit log
> v3: Change the design and fix code in driver
> v2: Change the testpmd code to fix this issue
> ---
> ---
>  drivers/net/i40e/i40e_vf_representor.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_vf_representor.c
> b/drivers/net/i40e/i40e_vf_representor.c
> index 7f8e81858e..bcd445bcdd 100644
> --- a/drivers/net/i40e/i40e_vf_representor.c
> +++ b/drivers/net/i40e/i40e_vf_representor.c
> @@ -29,8 +29,6 @@ i40e_vf_representor_dev_infos_get(struct rte_eth_dev
> *ethdev,
>  	struct rte_eth_dev_info *dev_info)
>  {
>  	struct i40e_vf_representor *representor = ethdev->data-
> >dev_private;
> -	struct rte_eth_dev_data *pf_dev_data =
> -		representor->adapter->pf.dev_data;
> 
>  	/* get dev info for the vdev */
>  	dev_info->device = ethdev->device;
> @@ -104,7 +102,7 @@ i40e_vf_representor_dev_infos_get(struct
> rte_eth_dev *ethdev,
>  	};
> 
>  	dev_info->switch_info.name =
> -		rte_eth_devices[pf_dev_data->port_id].device->name;
> +		rte_eth_devices[ethdev->data->port_id].device->name;
>  	dev_info->switch_info.domain_id = representor->switch_domain_id;
>  	dev_info->switch_info.port_id = representor->vf_id;
> 
> --
> 2.25.1