Re: ARM: OMAP3: Fix get_irqnr_and_base to clear spurious interrupt bits

[Tony Lindgren <tony@atomide.com>]

* Rick Bronson <rick@efn.org> [081023 11:13]:
> Tony,
> 
> > Well we should let the generic irq handler to do the logging.. But I
> > guess nothing will happen if adm_do_IRQ() does not get called.
> > 
> > We could have a dummy handler for some invented higher number that would
> > capture the spurious interrupts I guess.
> > 
> > BTW, ideally we would do the ldr conditionally rather than every time,
> > I guess that's the idea with the old way of doing things.
> 
>   Well, actually the ldr (I assume you mean this one):
> 
> 		ldrne	\irqnr, [\base, #INTCPS_SIR_IRQ_OFFSET]
> 
>   was being done everytime, since presumably, at least one of the
> "pending" bits would be set otherwise how would we get to this
> interrupt?  Which bring up a point - why bother even checking the
> pending bits at all?   Just grab the irqnr, check for spurious and
> exit.

Yeah that would be nice.

Tony