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-rw-r--r--drivers/net/ethernet/intel/igb/igb_main.c42
1 files changed, 31 insertions, 11 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index c208753ff5b7..8504900bf7b8 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -8718,7 +8718,8 @@ static void igb_rar_set_index(struct igb_adapter *adapter, u32 index)
/* Indicate to hardware the Address is Valid. */
if (adapter->mac_table[index].state & IGB_MAC_STATE_IN_USE) {
- rar_high |= E1000_RAH_AV;
+ if (is_valid_ether_addr(addr))
+ rar_high |= E1000_RAH_AV;
if (hw->mac.type == e1000_82575)
rar_high |= E1000_RAH_POOL_1 *
@@ -8756,17 +8757,36 @@ static int igb_set_vf_mac(struct igb_adapter *adapter,
static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
{
struct igb_adapter *adapter = netdev_priv(netdev);
- if (!is_valid_ether_addr(mac) || (vf >= adapter->vfs_allocated_count))
+
+ if (vf >= adapter->vfs_allocated_count)
+ return -EINVAL;
+
+ /* Setting the VF MAC to 0 reverts the IGB_VF_FLAG_PF_SET_MAC
+ * flag and allows to overwrite the MAC via VF netdev. This
+ * is necessary to allow libvirt a way to restore the original
+ * MAC after unbinding vfio-pci and reloading igbvf after shutting
+ * down a VM.
+ */
+ if (is_zero_ether_addr(mac)) {
+ adapter->vf_data[vf].flags &= ~IGB_VF_FLAG_PF_SET_MAC;
+ dev_info(&adapter->pdev->dev,
+ "remove administratively set MAC on VF %d\n",
+ vf);
+ } else if (is_valid_ether_addr(mac)) {
+ adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC;
+ dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n",
+ mac, vf);
+ dev_info(&adapter->pdev->dev,
+ "Reload the VF driver to make this change effective.");
+ /* Generate additional warning if PF is down */
+ if (test_bit(__IGB_DOWN, &adapter->state)) {
+ dev_warn(&adapter->pdev->dev,
+ "The VF MAC address has been set, but the PF device is not up.\n");
+ dev_warn(&adapter->pdev->dev,
+ "Bring the PF device up before attempting to use the VF device.\n");
+ }
+ } else {
return -EINVAL;
- adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC;
- dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
- dev_info(&adapter->pdev->dev,
- "Reload the VF driver to make this change effective.");
- if (test_bit(__IGB_DOWN, &adapter->state)) {
- dev_warn(&adapter->pdev->dev,
- "The VF MAC address has been set, but the PF device is not up.\n");
- dev_warn(&adapter->pdev->dev,
- "Bring the PF device up before attempting to use the VF device.\n");
}
return igb_set_vf_mac(adapter, vf, mac);
}