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Date: Fri, 13 Nov 2009 20:11:12 +0000
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Linux ACPI <linux-acpi@vger.kernel.org>,
       LKML <linux-kernel@vger.kernel.org>,
       bcm43xx devel <Bcm43xx-dev@lists.berlios.de>,
       Michael Buesch <mb@bu3sch.de>,
       =?iso-8859-1?Q?G=E1bor?= Stefanik <netrolller.3d@gmail.com>
Subject: Re: 64-bit DMA problems with BCM4312 using b43
Message-ID: <20091113201112.GA5540@srcf.ucam.org>
References: <4AFD958E.1000303@lwfinger.net>
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On Fri, Nov 13, 2009 at 11:21:18AM -0600, Larry Finger wrote:

> I do not know enough about either the ACPI or DMA code to begin debugging in
> either of those regions. Any suggestions on debugging strategies, or links to
> similar problems would be appreciated.

Could the hardware be highly sensitive to DMA latencies? Take a look at 
the pm_qos code in ipw2100.

-- 
Matthew Garrett | mjg59@srcf.ucam.org
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