[dpdk-dev] [PATCH v4 12/29] net/i40e: fix VF MAC address assignment

[Ferruh Yigit <ferruh.yigit@intel.com>]

If PF sets vf->mac_addr, in VF initialization hw->mac.addr will be set
to that same value. It is possible to check if PF set a MAC address or
not through the hw->mac.addr variable.

hw->mac.addr set by i40e_vf_parse_hw_config(), call stack is:

In PF side
i40e_pf_host_process_cmd_get_vf_resources()
    eth_addr_copy(vf->mac_addr, vf_res->vsi_res[0].default_mac_address)

In VF sise
i40evf_init_vf()
    i40evf_get_vf_resources()
            i40e_vf_parse_hw_config()
                    memcpy(hw->mac.addr, vsi_res->default_mac_addr)

Updated code is after i40evf_get_vf_resources() and can benefit from
hw->mac.addr variable.

Fixes: 89e6b86384bb ("i40evf: rework MAC address validation")

CC: stable@dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 5016249..0977095 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1193,7 +1193,6 @@ i40evf_init_vf(struct rte_eth_dev *dev)
 	int i, err, bufsz;
 	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
-	struct ether_addr *p_mac_addr;
 	uint16_t interval =
 		i40e_calc_itr_interval(I40E_QUEUE_ITR_INTERVAL_MAX);
 
@@ -1270,13 +1269,10 @@ i40evf_init_vf(struct rte_eth_dev *dev)
 	vf->vsi.adapter = I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 
 	/* Store the MAC address configured by host, or generate random one */
-	p_mac_addr = (struct ether_addr *)(vf->vsi_res->default_mac_addr);
-	if (is_valid_assigned_ether_addr(p_mac_addr)) { /* Configured by host */
-		ether_addr_copy(p_mac_addr, (struct ether_addr *)hw->mac.addr);
+	if (is_valid_assigned_ether_addr((struct ether_addr *)hw->mac.addr))
 		vf->flags |= I40E_FLAG_VF_MAC_BY_PF;
-	} else {
+	else
 		eth_random_addr(hw->mac.addr); /* Generate a random one */
-	}
 
 	/* If the PF host is not DPDK, set the interval of ITR0 to max*/
 	if (vf->version_major != I40E_DPDK_VERSION_MAJOR) {
-- 
2.9.3