[dpdk-stable] [PATCH v4] net/i40e: fix i40evf device initialization

[Ben Magistro]

The i40evf driver is not initializing the eth_dev attribute which
can result in a nullptr dereference. Changes were modeled after the
iavf_dev_init() per suggestion from the mailing list[1] and
i40evf_init_vf().

[1] https://mails.dpdk.org/archives/dev/2021-August/217251.html

Rebased on v20.11.3.

Fixes: 4861cde46116 ("i40e: new poll mode driver")
Cc: stable at dpdk.org

Signed-off-by: Ben Magistro <koncept1 at gmail.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 625981048a..adfe4f12f7 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1564,6 +1564,7 @@ i40evf_dev_init(struct rte_eth_dev *eth_dev)
 {
 	struct i40e_hw *hw
 		= I40E_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
+	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(eth_dev->data->dev_private);
 	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
 
 	PMD_INIT_FUNC_TRACE();
@@ -1594,12 +1595,17 @@ i40evf_dev_init(struct rte_eth_dev *eth_dev)
 	hw->device_id = pci_dev->id.device_id;
 	hw->subsystem_vendor_id = pci_dev->id.subsystem_vendor_id;
 	hw->subsystem_device_id = pci_dev->id.subsystem_device_id;
+	hw->bus.bus_id = pci_dev->addr.bus;
 	hw->bus.device = pci_dev->addr.devid;
 	hw->bus.func = pci_dev->addr.function;
 	hw->hw_addr = (void *)pci_dev->mem_resource[0].addr;
 	hw->adapter_stopped = 1;
 	hw->adapter_closed = 0;
 
+	vf->adapter = I40E_DEV_PRIVATE_TO_ADAPTER(eth_dev->data->dev_private);
+	vf->dev_data = eth_dev->data;
+	hw->back = I40E_DEV_PRIVATE_TO_ADAPTER(vf);
+
 	if(i40evf_init_vf(eth_dev) != 0) {
 		PMD_INIT_LOG(ERR, "Init vf failed");
 		return -1;
-- 
2.27.0