From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 16 Nov 2009 18:06:46 +0100 (CET) Received: from localhost.localdomain ([127.0.0.1]:33619 "EHLO h5.dl5rb.org.uk" rhost-flags-OK-OK-OK-FAIL) by ftp.linux-mips.org with ESMTP id S1493433AbZKPRGm (ORCPT ); Mon, 16 Nov 2009 18:06:42 +0100 Received: from h5.dl5rb.org.uk (localhost.localdomain [127.0.0.1]) by h5.dl5rb.org.uk (8.14.3/8.14.3) with ESMTP id nAGH6k5I017021; Mon, 16 Nov 2009 18:06:46 +0100 Received: (from ralf@localhost) by h5.dl5rb.org.uk (8.14.3/8.14.3/Submit) id nAGH6fq0017019; Mon, 16 Nov 2009 18:06:41 +0100 Date: Mon, 16 Nov 2009 18:06:41 +0100 From: Ralf Baechle To: Wu Zhangjin Cc: Jaroslav Kysela , Takashi Iwai , alsa-devel@alsa-project.org, linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, Wu Zhangjin Subject: Re: [PATCH] MIPS: Fixups of ALSA memory maps Message-ID: <20091116170641.GD14948@linux-mips.org> References: <9cbcd06037c18288a6493459b8f3a6e1562eca77.1258389992.git.wuzhangjin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9cbcd06037c18288a6493459b8f3a6e1562eca77.1258389992.git.wuzhangjin@gmail.com> User-Agent: Mutt/1.5.19 (2009-01-05) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 24926 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ralf@linux-mips.org Precedence: bulk X-list: linux-mips On Tue, Nov 17, 2009 at 12:48:14AM +0800, Wu Zhangjin wrote: > Seems this is MIPS specific, but it's not that easy to move this patch > into the arch/mips part, So, any better solution? > > Thanks & Regards, > Wu Zhangjin > > ------------------------ > > The user application mmap audio dma regions must be dma-coherent. This > patch fix it. > > Without this patch, artsd will fail on boot, and mplayer will exit with > "Segmentation fault". (this happens on YeeLoong netbook, fuloong2f > mini pc with snd_cs5535 audio card) > > This is originally from the to-mips branch of > http://dev.lemote.com/code/linux_loongson, and contributed by Yanhua > from Lemote Inc. > > Reported-by: qiaochong > Signed-off-by: Wu Zhangjin This issue is an old ghost still around, see: http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20060124.132832.37533152.nemoto%40toshiba-tops.co.jp which is a superset of your proposed patch and which itself is refering to an even older posting from 2003: http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20030523215935.71373.qmail%40web11901.mail.yahoo.com The #ifdef'ed solution doesn't cut it for sure. Let's see what better we can find ... Ralf