Thanks colin,So that means i can go ahead and upgrade controller(7200) with the new ios-6.4.4.8 and IAP's will autoupgrade after reboot.Which ios you suggest 6.4.4.8 or 6.4.4.9?
Also we have master controller on active/standby mode.Is below procedure the better way to upgrade? :-
1)Failolver AP's to standby by shutting vrrp instance on active,this will make standby as primary.
2)Upgrade primary(now standby) with new ios,unshut vrrp instance and
failover Ap's to this device.
3)Same procedure for standby.