linux-kernel - Re: [PATCH 3/6] ARM: EXYNOS: add Exynos Dual Cluster Support

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Date:	Mon, 7 Oct 2013 18:06:27 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Dave Martin <Dave.Martin@....com>
cc:	Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
	Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	Ben Dooks <ben-linux@...ff.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	linux-samsung-soc@...r.kernel.org,
	Vyacheslav Tyrtov <v.tyrtov@...sung.com>,
	Rob Landley <rob@...dley.net>,
	Stephen Warren <swarren@...dotorg.org>,
	Tarek Dakhran <t.dakhran@...sung.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Naour Romain <romain.naour@...nwide.fr>,
	Mike Turquette <mturquette@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	Heiko Stuebner <heiko@...ech.de>
Subject: Re: [PATCH 3/6] ARM: EXYNOS: add Exynos Dual Cluster Support

On Mon, 7 Oct 2013, Dave Martin wrote:

> On Fri, Oct 04, 2013 at 03:51:31PM -0400, Nicolas Pitre wrote:
> > No FIQs are supposed to ever race with this code.
> 
> There is an anomaly though: FIQ and external abort don't seem to get
> explicitly masked anywhere, either on the suspend or powerdown paths.
> Sometimes either or both remains unmasked (I tried some trace in the
> TC2 MCPM backend to confirm this.)
> 
> Looks like a possible omission in the arch/arm/ suspend and shutdown
> code, rather than a problem specific to MCPM.

Possibly, yes.

Feel free to post a patch.


Nicolas
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