ixgbe: Don't give VFs random MAC addresses

If the user has not assigned a MAC address to a VM, then don't give it a
random one. Instead, just give it zeros and let it figure out what to do
with them.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index d44b4d2..b3e6530 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
@@ -661,13 +661,7 @@ int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
        bool enable = ((event_mask & 0x10000000U) != 0);
 
        if (enable) {
-               eth_random_addr(vf_mac_addr);
-               e_info(probe, "IOV: VF %d is enabled MAC %pM\n",
-                      vfn, vf_mac_addr);
-               /*
-                * Store away the VF "permananet" MAC address, it will ask
-                * for it later.
-                */
+               eth_zero_addr(vf_mac_addr);
                memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
        }
 
@@ -688,7 +682,8 @@ static int ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
        ixgbe_vf_reset_event(adapter, vf);
 
        /* set vf mac address */
-       ixgbe_set_vf_mac(adapter, vf, vf_mac);
+       if (!is_zero_ether_addr(vf_mac))
+               ixgbe_set_vf_mac(adapter, vf, vf_mac);
 
        vf_shift = vf % 32;
        reg_offset = vf / 32;
@@ -729,8 +724,16 @@ static int ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
        IXGBE_WRITE_REG(hw, IXGBE_VMECM(reg_offset), reg);
 
        /* reply to reset with ack and vf mac address */
-       msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
-       memcpy(addr, vf_mac, ETH_ALEN);
+       msgbuf[0] = IXGBE_VF_RESET;
+       if (!is_zero_ether_addr(vf_mac)) {
+               msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
+               memcpy(addr, vf_mac, ETH_ALEN);
+       } else {
+               msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
+               dev_warn(&adapter->pdev->dev,
+                        "VF %d has no MAC address assigned, you may have to assign one manually\n",
+                        vf);
+       }
 
        /*
         * Piggyback the multicast filter type so VF can compute the