be2net: Fix change MAC operation for VF for Lancer

For changing MAC of VF from PF, delete MAC operation needs to be done before
assigning new MAC. Also in ndo_set_mac_address operation avoid delete MAC if
it has been already deleted by PF.
Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/emulex/benet/be_main.c

@@ -237,23 +237,46 @@ static int be_mac_addr_set(struct net_device *netdev, void *p)
 	int status = 0;
 	u8 current_mac[ETH_ALEN];
 	u32 pmac_id = adapter->pmac_id[0];
+	bool active_mac = true;
 
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EADDRNOTAVAIL;
 
-	status = be_cmd_mac_addr_query(adapter, current_mac, false,
-				       adapter->if_handle, 0);
-	if (status)
+	/* For BE VF, MAC address is already activated by PF.
+	 * Hence only operation left is updating netdev->devaddr.
+	 * Update it if user is passing the same MAC which was used
+	 * during configuring VF MAC from PF(Hypervisor).
+	 */
+	if (!lancer_chip(adapter) && !be_physfn(adapter)) {
+		status = be_cmd_mac_addr_query(adapter, current_mac,
+					       false, adapter->if_handle, 0);
+		if (!status && !memcmp(current_mac, addr->sa_data, ETH_ALEN))
+			goto done;
+		else
 			goto err;
+	}
+
+	if (!memcmp(addr->sa_data, netdev->dev_addr, ETH_ALEN))
+		goto done;
+
+	/* For Lancer check if any MAC is active.
+	 * If active, get its mac id.
+	 */
+	if (lancer_chip(adapter) && !be_physfn(adapter))
+		be_cmd_get_mac_from_list(adapter, current_mac, &active_mac,
+					 &pmac_id, 0);
 
-	if (memcmp(addr->sa_data, current_mac, ETH_ALEN)) {
 	status = be_cmd_pmac_add(adapter, (u8 *)addr->sa_data,
-				adapter->if_handle, &adapter->pmac_id[0], 0);
+				 adapter->if_handle,
+				 &adapter->pmac_id[0], 0);
+
 	if (status)
 		goto err;
 
-		be_cmd_pmac_del(adapter, adapter->if_handle, pmac_id, 0);
-	}
+	if (active_mac)
+		be_cmd_pmac_del(adapter, adapter->if_handle,
+				pmac_id, 0);
+done:
 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 	return 0;
 err:
@@ -962,6 +985,9 @@ static int be_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 	struct be_adapter *adapter = netdev_priv(netdev);
 	struct be_vf_cfg *vf_cfg = &adapter->vf_cfg[vf];
 	int status;
+	bool active_mac = false;
+	u32 pmac_id;
+	u8 old_mac[ETH_ALEN];
 
 	if (!sriov_enabled(adapter))
 		return -EPERM;
@@ -970,6 +996,12 @@ static int be_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 		return -EINVAL;
 
 	if (lancer_chip(adapter)) {
+		status = be_cmd_get_mac_from_list(adapter, old_mac, &active_mac,
+						  &pmac_id, vf + 1);
+		if (!status && active_mac)
+			be_cmd_pmac_del(adapter, vf_cfg->if_handle,
+					pmac_id, vf + 1);
+
 		status = be_cmd_set_mac_list(adapter,  mac, 1, vf + 1);
 	} else {
 		status = be_cmd_pmac_del(adapter, vf_cfg->if_handle,