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 21:13:06 +0000 Message-ID: <20091113211306.GA6600@srcf.ucam.org> References: <4AFD958E.1000303@lwfinger.net> <20091113201112.GA5540@srcf.ucam.org> <200911132144.24110.mb@bu3sch.de> <4AFDCA0E.4080007@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]:37940 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932315AbZKMVNI (ORCPT ); Fri, 13 Nov 2009 16:13:08 -0500 Content-Disposition: inline In-Reply-To: <4AFDCA0E.4080007@lwfinger.net> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Larry Finger Cc: Michael Buesch , bcm43xx-dev@lists.berlios.de, Linux ACPI , LKML On Fri, Nov 13, 2009 at 03:05:18PM -0600, Larry Finger wrote: > I'm in the process of creating a patch to set the latency to 200 usec. The > default is 2000. On my fast prosessors, it should not be anything nearly that > slow. If we determine this to be the problem, then we can try tuning. The latency is the amount of time it takes to get out of deep C states and into C0. That's a function of the processor design rather than the frequency. -- Matthew Garrett | mjg59@srcf.ucam.org