Date: Mon, 16 Nov 2009 18:12:22 +0100
Message-ID: <s5hd43iiebt.wl%tiwai@suse.de>
From: Takashi Iwai <tiwai@suse.de>
To: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>, Jaroslav Kysela <perex@perex.cz>,
       alsa-devel@alsa-project.org, linux-mips@linux-mips.org,
       linux-kernel@vger.kernel.org, Wu Zhangjin <wuzj@lemote.com>
Subject: Re: [PATCH] MIPS: Fixups of ALSA memory maps
In-Reply-To: <9cbcd06037c18288a6493459b8f3a6e1562eca77.1258389992.git.wuzhangjin@gmail.com>
References: <9cbcd06037c18288a6493459b8f3a6e1562eca77.1258389992.git.wuzhangjin@gmail.com>
User-Agent: Wanderlust/2.15.6 (Almost Unreal) SEMI/1.14.6 (Maruoka)
 FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.7 Emacs/23.1
 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO)
MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka")
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 891
Lines: 27

At Tue, 17 Nov 2009 00:48:14 +0800,
Wu Zhangjin wrote:
> 
> Hi, All
> 
> Seems this is MIPS specific, but it's not that easy to move this patch
> into the arch/mips part, So, any better solution?

Actually, this has been a looong-standing problem.
I have a series of patches to fix these issues, but it's more
intensively involved with dma_*() functions.

The patches can be found in test/dma-fix branch of sound GIT tree.
  git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git test/dma-fix

This basically adds dma_mmap_coherent() function to feasible
architectures, which is already implemented for ARM, so far.


thanks,

Takashi
--
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/