From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932652AbWF2VPR (ORCPT ); Thu, 29 Jun 2006 17:15:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932533AbWF2VPQ (ORCPT ); Thu, 29 Jun 2006 17:15:16 -0400 Received: from mail.gmx.de ([213.165.64.21]:16024 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S932661AbWF2VPO (ORCPT ); Thu, 29 Jun 2006 17:15:14 -0400 Cc: linux-kernel@vger.kernel.org, alsa-devel@lists.sourceforge.net, rlrevell@joe-job.com, linuxppc-dev@ozlabs.org Content-Type: text/plain; charset="iso-8859-1" Date: Thu, 29 Jun 2006 23:15:13 +0200 From: "Gerhard Pircher" In-Reply-To: Message-ID: <20060629211513.64980@gmx.net> MIME-Version: 1.0 References: <20060628202753.198630@gmx.net> Subject: Re: [Alsa-devel] RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA? To: Takashi Iwai X-Authenticated: #6097454 X-Flags: 0001 X-Mailer: WWW-Mail 6100 (Global Message Exchange) X-Priority: 3 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org -------- Original-Nachricht -------- Datum: Thu, 29 Jun 2006 11:27:15 +0200 Von: Takashi Iwai An: Gerhard Pircher Betreff: Re: [Alsa-devel] RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA? > At Wed, 28 Jun 2006 22:27:53 +0200, > Gerhard Pircher wrote: > > > > Hi, > > > > It took a little bit longer to integrate the patch, as I didn't figure > out first how to implement the __dma_mmap_coherent() function for PPC > systems with CONFIG_NOT_COHERENT_CACHE defined. :) > > > > Unfortunately my system still crashes within snd_pcm_mmap_data_nopage() > > (sound/core/pcm_native.c), as you can see below. I guess it tries to > remap > > a DMA buffer allocated by the not cache coherent DMA memory allocation > > function in arch/ppc/kernel/dma-mapping.c. > > Strange, nopage will be never called if you apply my patch and modify > to use dma_mmap_coherent(). > > > Takashi > That's indeed strange! I'm sure that the new code is called by the sound drivers. Should snd_pcm_mmap_data_nopage() not be used at all anymore, or are there any cases that could still trigger a call of snd_pcm_mmap_data_nopage()? Gerhard -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer