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Re: [PATCH] MIPS: Fixups of ALSA memory maps

To: Wu Zhangjin <>
Subject: Re: [PATCH] MIPS: Fixups of ALSA memory maps
From: Takashi Iwai <>
Date: Mon, 16 Nov 2009 18:12:22 +0100
Cc: Ralf Baechle <>, Jaroslav Kysela <>,,,, Wu Zhangjin <>
In-reply-to: <>
Original-recipient: rfc822;
References: <>
User-agent: Wanderlust/2.15.6 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (Gojō) APEL/10.7 Emacs/23.1 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO)
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:// test/dma-fix

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



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