Re: 2 questions about interrupts

[Jimmy DeWitt <jdewitt@xxxxxxxxxx>]

>> 
>> 2) How do I change irq_desc[my_irq].action->handler
 ?
>>        
is there a clean interface to update it?

>Why do you want to do this? Is request_irq()
not sufficient?

I am using the intel ia32 performance
counters to fire a overflow interrupt. (2.4.21 kernel)
I use request_irq to register the handler
(and it works), but I get
the default behavior of printing the
"unexpected IRQ trap at vector  xx"
on every interrupt before the ack.

The only way that I have found to "fix"
this problem is to replace the
default  irq_desc[#]->handler->ack
 routine.

I can do this by using the map to get
the address of irq_desc[] and then
replacing the default handler, but isn't
there a better way to do this?


I used "request_irq(0xd0,my_handler,SA_INTERRUPT,"My
Interrupt",NULL);