bonding: Invert test

Make the error case return early.
Make the normal return at the bottom of the function.
Reduces indent for readability.
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_3ad.c

@@ -2379,7 +2379,9 @@ int __bond_3ad_get_active_agg_info(struct bonding *bond,
 		}
 	}
 
-	if (aggregator) {
+	if (!aggregator)
+		return -1;
+
 	ad_info->aggregator_id = aggregator->aggregator_identifier;
 	ad_info->ports = aggregator->num_of_ports;
 	ad_info->actor_key = aggregator->actor_oper_aggregator_key;
@@ -2387,9 +2389,6 @@ int __bond_3ad_get_active_agg_info(struct bonding *bond,
 	ether_addr_copy(ad_info->partner_system,
 			aggregator->partner_system.mac_addr_value);
 	return 0;
-	}
-
-	return -1;
 }
 
 /* Wrapper used to hold bond->lock so no slave manipulation can occur */