From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: Re: 64-bit DMA problems with BCM4312 using b43 Date: Fri, 13 Nov 2009 20:11:12 +0000 Message-ID: <20091113201112.GA5540@srcf.ucam.org> References: <4AFD958E.1000303@lwfinger.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from cavan.codon.org.uk ([93.93.128.6]:44421 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757184AbZKMULQ (ORCPT ); Fri, 13 Nov 2009 15:11:16 -0500 Content-Disposition: inline In-Reply-To: <4AFD958E.1000303@lwfinger.net> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Larry Finger Cc: Linux ACPI , LKML , bcm43xx devel , Michael Buesch , =?iso-8859-1?Q?G=E1bor?= Stefanik 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