linux-kernel - Re: [PATCH v2] powerpc/mpic: Add DT option to skip readback after EOI

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Message-ID: <1422486205.10544.99.camel@freescale.com>
Date:	Wed, 28 Jan 2015 17:03:25 -0600
From:	Scott Wood <scottwood@...escale.com>
To:	Segher Boessenkool <segher@...nel.crashing.org>
CC:	Bogdan Purcareata <bogdan.purcareata@...escale.com>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] powerpc/mpic: Add DT option to skip readback after
 EOI

On Wed, 2015-01-28 at 14:15 -0600, Segher Boessenkool wrote:
> On Tue, Jan 27, 2015 at 03:57:53PM -0600, Scott Wood wrote:
> > At this point, given the previous discussion, does anyone object to
> > removing the readback entirely?  Do we have any evidence that reading
> > WHOAMI is effective at addressing whatever problem reading EOI made go
> > away on the relevant platform?
> 
> What platforms were those?  Just test there!

Ben said "some macs".  The only Mac I have is packed away and may not be
the one Ben had in mind, so I can't "test there".

> If no one remembers, they can not (any longer) be important platforms ;-)
> Just remove the code, and if in twelve months finally someone reports a
> failure we will at least know what platform it was.

This is what I was trying to encourage. :-)

-Scott


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