From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752193AbbCZJvZ (ORCPT ); Thu, 26 Mar 2015 05:51:25 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:47739 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751184AbbCZJvU (ORCPT ); Thu, 26 Mar 2015 05:51:20 -0400 Date: Thu, 26 Mar 2015 10:51:17 +0100 From: Pavel Machek To: Adrian Hunter Cc: Ulf Hansson , linux-mmc , "Rafael J. Wysocki" , Len Brown , Kevin Hilman , Tomeu Vizoso , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 0/4] mmc: sdhci: Support maximum DMA latency request via PM QoS Message-ID: <20150326095117.GA637@amd> References: <1427204440-3533-1-git-send-email-adrian.hunter@intel.com> <20150325194259.GB381@amd> <5513C352.2080208@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5513C352.2080208@intel.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu 2015-03-26 10:29:06, Adrian Hunter wrote: > On 25/03/15 21:43, Pavel Machek wrote: > > Hi! > > > >> Here are some patches to address an issue with SDHCI > >> in Intel Baytrail. Intel Baytrail has been observed > >> sometimes to hang if host controllers are using DMA > >> while deep C-states are used. Workaround that by > > > > I wonder if there is more information on this one? I see your address > > is "@intel". For example which C states are affected, and if there's > > The problem starts at C6 - I will add that to the commit message. Better find a place for a comment in code, too... Thanks, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html