From: Arnd Bergmann <arnd@arndb.de>
To: Gregory CLEMENT <gregory.clement@free-electrons.com>
Subject: Re: [PATCH 1/2] arm: mvebu: increase atomic coherent pool size for armada 370/XP
Date: Thu, 25 Oct 2012 11:27:36 +0000
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Cc: Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
        linux-arm-kernel@lists.infradead.org, Olof Johansson <olof@lixom.net>,
        Ben Dooks <ben-linux@fluff.org>,
        Ian Molton <ian.molton@codethink.co.uk>,
        Nicolas Pitre <nico@fluxnic.net>, Lior Amsalem <alior@marvell.com>,
        Maen Suleiman <maen@marvell.com>, Tawfik Bayouk <tawfik@marvell.com>,
        Shadi Ammouri <shadi@marvell.com>, "Eran Ben-Avi" <benavi@marvell.com>,
        Yehuda Yitschak <yehuday@marvell.com>,
        Nadav Haklai <nadavh@marvell.com>, Ike Pan <ike.pan@canonical.com>,
        Jani Monoses <jani.monoses@canonical.com>,
        Chris Van Hoof <vanhoof@canonical.com>,
        Dan Frazier <dann.frazier@canonical.com>,
        Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
        Leif Lindholm <leif.lindholm@arm.com>, Jon Masters <jcm@redhat.com>,
        David Marlin <dmarlin@redhat.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
        linux-kernel@vger.kernel.org,
        Marek Szyprowski <m.szyprowski@samsung.com>
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On Wednesday 24 October 2012, Gregory CLEMENT wrote:
> For Armada 370/XP we have the same problem that for the commit
> cb01b63, so we applied the same solution: "The default 256 KiB
> coherent pool may be too small for some of the Kirkwood devices, so
> increase it to make sure that devices will be able to allocate their
> buffers with GFP_ATOMIC flag"
> 
> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

Do you know why the ATA driver needs this? I find it surprising that
it's necessary, so I'd like to make sure we're not just working around
a device driver bug here.

	Arnd
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