linux-kernel - Re: [PATCH] MIPS: Fixups of ALSA memory maps

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Date:	Mon, 16 Nov 2009 18:12:22 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Wu Zhangjin <wuzhangjin@...il.com>
Cc:	Ralf Baechle <ralf@...ux-mips.org>,
	Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	Wu Zhangjin <wuzj@...ote.com>
Subject: Re: [PATCH] MIPS: Fixups of ALSA memory maps

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
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