Andy Green wrote: > No ISR would ever execute if somehow the not-yet-ack'd interrupt > source kept recursing...
A higher-priority interrupt, one down the chain if we have multiple handlers (I don't think we ever do) and don't accept it in our handler, or an FIQ. But I can't think of any specific scenario here either. That's more in sense of "things that can go wrong with interrupts in general". - Werner
