Prevent failback to MASTER after failover

[Ming Fang]

We're using MASTER SLAVE in AUTO model.
When the MASTER is killed, the failover is working properly as the SLAVE 
transitions to become MASTER.
However if the failed MASTER is restarted, it will try to become MASTER again.
This is causing a problem in our business logic.
Is there a way to prevent the failed instance from becoming MASTER again?