linux-kernel - Re: [PATCH 1/2] add the device argument to dma_mapping

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Date:	Thu, 15 May 2008 10:12:25 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	randy.dunlap@...cle.com
Cc:	fujita.tomonori@....ntt.co.jp, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, muli@...ibm.com, alexisb@...ibm.com
Subject: Re: [PATCH 1/2] add the device argument to dma_mapping_error

On Tue, 13 May 2008 08:39:01 -0700
Randy Dunlap <randy.dunlap@...cle.com> wrote:

> On Tue, 13 May 2008 15:04:51 +0900 FUJITA Tomonori wrote:
> 
> > dma_mapping_error doesn't take a pointer to the device unlike other
> > DMA operations. So we can't have dma_mapping_ops per device.
> > 
> > Note that POWER already has dma_mapping_ops per device but all the
> > POWER IOMMUs use the same dma_mapping_error function. x86 IOMMUs use
> > different dma_mapping_error functions. So dma_mapping_error needs the
> > device argument.
> > 
> > Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>

(snip)

> Seems to be missing updates to Documentation/DMA-API.txt ??

Oops, I'll post an updated version against -mm soon.

Thanks,
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