[PATCH v5] net/i40e: fix the issue caused by PF and VF release order

[Zhang, Qi Z]

> -----Original Message-----
> From: Ke Zhang <ke1x.zhang at intel.com>
> Sent: Thursday, August 4, 2022 5:50 PM
> To: Xing, Beilei <beilei.xing at intel.com>; Zhang, Yuying
> <yuying.zhang at intel.com>; dev at dpdk.org
> Cc: Zhang, Ke1X <ke1x.zhang at intel.com>; stable at dpdk.org
> Subject: [PATCH v5] 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
> 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>

Applied to dpdk-next-net-intel.

Thanks
Qi


> ---
> v5: Update the commit log
> 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