ice: Fix check for removing/adding mac filters

In function ice_set_mac_address, we will remove old dev_addr before
adding the new MAC. In the removing and adding process of the MAC,
there is no need to return error if the check finds the to-be-removed
dev_addr does not exist in the MAC filter list or the to-be-added mac
already exists, keep going or return success accordingly.

Signed-off-by: Lihong Yang <[e-mail]>
Signed-off-by: Anirudh Venkataramanan <[e-mail]>
Tested-by: Andrew Bowers <[e-mail]>
Signed-off-by: Jeff Kirsher <[e-mail]>

drivers/net/ethernet/intel/ice/ice_main.c

···
 		return -EBUSY;
 	}
 
-	/* Clean up old MAC filter before changing the MAC address */
+	/* Clean up old MAC filter. Not an error if old filter doesn't exist */
 	status = ice_fltr_remove_mac(vsi, netdev->dev_addr, ICE_FWD_TO_VSI);
-	if (status) {
+	if (status && status != ICE_ERR_DOES_NOT_EXIST) {
 		err = -EADDRNOTAVAIL;
 		goto err_update_filters;
 	}
 
+	/* Add filter for new MAC. If filter exists, just return success */
 	status = ice_fltr_add_mac(vsi, mac, ICE_FWD_TO_VSI);
-	if (status) {
-		err = -EADDRNOTAVAIL;
-		goto err_update_filters;
+	if (status == ICE_ERR_ALREADY_EXISTS) {
+		netdev_dbg(netdev, "filter for MAC %pM already exists\n", mac);
+		return 0;
 	}
+
+	/* error if the new filter addition failed */
+	if (status)
+		err = -EADDRNOTAVAIL;
 
 err_update_filters:
 	if (err) {