linux-kernel - Re: [PATCH 04 of 14] swiotlb: consistently use address_needs

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Message-ID: <49492B68.7040509@goop.org>
Date:	Wed, 17 Dec 2008 08:40:08 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC:	mingo@...e.hu, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xensource.com, x86@...nel.org,
	ian.campbell@...rix.com, jbeulich@...ell.com
Subject: Re: [PATCH 04 of 14] swiotlb: consistently use address_needs_mapping
 everywhere

FUJITA Tomonori wrote:
> On Tue, 16 Dec 2008 12:17:28 -0800
> Jeremy Fitzhardinge <jeremy@...p.org> wrote:
>
>   
>> Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
>> ---
>>  lib/swiotlb.c |   10 +++-------
>>  1 file changed, 3 insertions(+), 7 deletions(-)
>>     
>
> This patch is wrong.
>
> dma_mask and coherent_dma_mask represent different restrictions.
>
> You can't use coherent_dma_mask for alloc_coherent.
>   

OK.  It looks like this patch is just an (erroneous) cleanup, so we can 
drop it.

    J
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