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

[Ke Zhang <ke1x.zhang@intel.com>]

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@dpdk.org

Signed-off-by: Ke Zhang <ke1x.zhang@intel.com>
Acked-by: Yuying Zhang <yuying.zhang@intel.com>
---
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