linux-kernel - Re: [PATCH] DMAENGINE: add a slave buffer prep call

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Date:	Wed, 11 Aug 2010 19:42:19 +0530
From:	Rabin Vincent <rabin@....in>
To:	Linus Walleij <linus.walleij@...ricsson.com>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org, Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH] DMAENGINE: add a slave buffer prep call

On Tue, Aug 10, 2010 at 11:46:06PM +0200, Linus Walleij wrote:
> This makes it possible for engines to implement slave transfers
> to be done to/from a simple kmalloc():ed memory buffer and not
> just from scatterlists.

Why is this needed?  Drivers can just pass in a single-entry scatterlist
to the existing API to achieve the same functionality, and a couple of
them already do so.

Rabin
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