linux-kernel - Re: [PATCH 0/4] allow drivers to flush in-flight DMA

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Date:	Thu, 27 Sep 2007 17:27:34 -0700
From:	akepner@....com
To:	Grant Grundler <grundler@...isc-linux.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Jes Sorensen <jes@....com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	David Miller <davem@...emloft.net>,
	Roland Dreier <rdreier@...co.com>,
	linux-kernel@...r.kernel.org,
	James Bottomley <James.Bottomley@...eleye.com>
Subject: Re: [PATCH 0/4] allow drivers to flush in-flight DMA

On Wed, Sep 26, 2007 at 12:49:50AM -0600, Grant Grundler wrote:

[edited out several points that I think have been already 
addresed by others in this thread.]

> ....
> Defining it terms of completion queues won't mean much to most folks.
> Better to add a description of completion queues to the DMA-API.txt if
> necessary.  dma_alloc_coherent() API is pretty well understood.

OK, next time I'll use a more generic description.

> 
> > There are four patches in this set:
> > 
> >   [1/4] dma: add dma_flags_set_dmaflush() to dma interface
> 
> Sorry - this feels like a "color of the shed" argument, but isn't
> this about DMA ordering attribute?
> "dmaflush" is an action and not an attribute to me.

Right - an attribute is a noun, not a verb. I'm going to try 
"s/dmaflush/dmabarrier/" in the next version.

> ....
> This patch updates Documentation/DMA-mapping.txt. But it's a change to
> the generic (not PCI specific) API described in DMA-API.txt.
> Can you update that as well please?
>....

Ja, I realized that soon after hitting the send button. I'll 
move the documentation to DMA-API.txt.

-- 
Arthur

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