[PATCH] irqdomain: Allow quiet failure mode

[Grant Likely]

On Mon, May 6, 2013 at 7:41 AM, Benjamin Herrenschmidt
<benh at kernel.crashing.org> wrote:
> Some interrupt controllers refuse to map interrupts marked as
> "protected" by firwmare. Since we try to map everyting in the
> device-tree on some platforms, we end up with a lot of nasty
> WARN's in the boot log for what is a normal situation on those
> machines.
>
> This defines a specific return code (-EPERM) from the host map()
> callback which cause irqdomain to fail silently.
>
> MPIC is updated to return this when hitting a protected source
> printing only a single line message for diagnostic purposes.
>
> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
>
>
> Grant, I'm happy to merge that myself provided I have your ack,
> it fixes an annoying problem on Cell introduced by previous changes
> to irqdomain (not recent but users started to notice).

Yes, please merge it since powerpc needs it.

Acked-by: Grant Likely <grant.likely at linaro.org>

g.