Questions on interrupt vector assignment on MPC8641D

Scott Wood scottwood at
Fri Oct 15 04:50:10 EST 2010

On Thu, 14 Oct 2010 12:20:55 -0500
<david.hagood at> wrote:

> > It comes from FRR[NIRQ].  It seems that this chip takes a
> > less-than-useful interpretation of what that field means -- it gives
> > the actual number of sources, not the size of the sparsely populated
> > array.
> Perhaps you might want to have a talk with your cow-orkers there, Scott,
> since this is a Freescale part.

Well, it was a coworker who added the workaround, so I assume we're
already aware of the issue.

The description of NIRQ is vague enough that it's hard to argue that
Linux's expectations of what it means are justified.


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