be2net: change to call pmac_del only if necessary

If a mac address has not been configured for a VF,
there is no need to call be_cmd_pmac_del.
Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/benet/be.h

@@ -221,6 +221,7 @@ struct be_rx_obj {
 };
 
 #define BE_NUM_MSIX_VECTORS		2	/* 1 each for Tx and Rx */
+#define BE_INVALID_PMAC_ID		0xffffffff
 struct be_adapter {
 	struct pci_dev *pdev;
 	struct net_device *netdev;

drivers/net/benet/be_main.c

@@ -656,6 +656,7 @@ static int be_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
 	if (!is_valid_ether_addr(mac) || (vf >= num_vfs))
 		return -EINVAL;
 
+	if (adapter->vf_pmac_id[vf] != BE_INVALID_PMAC_ID)
 		status = be_cmd_pmac_del(adapter, adapter->vf_if_handle[vf],
 					adapter->vf_pmac_id[vf]);
 
@@ -1910,6 +1911,7 @@ static int be_setup(struct be_adapter *adapter)
 				"Interface Create failed for VF %d\n", vf);
 				goto if_destroy;
 			}
+			adapter->vf_pmac_id[vf] = BE_INVALID_PMAC_ID;
 			vf++;
 		}
 	} else if (!be_physfn(adapter)) {