Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753379AbZKPRGn (ORCPT ); Mon, 16 Nov 2009 12:06:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752669AbZKPRGm (ORCPT ); Mon, 16 Nov 2009 12:06:42 -0500 Received: from eddie.linux-mips.org ([78.24.191.182]:34903 "EHLO eddie.linux-mips.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752164AbZKPRGm (ORCPT ); Mon, 16 Nov 2009 12:06:42 -0500 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) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1502 Lines: 42 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/