hmm... so then how does the int handler know if it needs to service an interrupt.
I mean it could be that the handler was invoked by the kernel when it walked through all the int handlers.
so how does the handler know if there is actually an interrupt to be serviced if there's not hardware reg on the device to tell that.
> Date: Thu, 3 May 2007 13:59:38 -0400
> From: vapier.adi@xxxxxxxxx
> To: k_bisla@xxxxxxxxxxx
> Subject: Re: Shared Interrupt handling.
> CC: rajat.noida.india@xxxxxxxxx; kernelnewbies@xxxxxxxxxxxx
>
> On 5/3/07, k b <k_bisla@xxxxxxxxxxx> wrote:
> > Also is it always that the hardware have a register which tell if there is a
> > pending interrupt, which the int handler checks to make sure if need to
> > service an int.
>
> no ... it's all done in the interrupt handler
> -mike
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