linux-kernel - Re: [PATCH] dmaengine: dma40: Add support to split up large elements

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Message-ID: <AANLkTi=7E7rAc=46p5d6YSpLeut5yehmBtLa4TVofefp@mail.gmail.com>
Date:	Mon, 20 Dec 2010 23:08:19 +0100
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	Per Forlin <per.forlin@...ricsson.com>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org, Per Forlin <per.forlin@...aro.org>
Subject: Re: [PATCH] dmaengine: dma40: Add support to split up large elements

2010/12/20 Per Forlin <per.forlin@...ricsson.com>:

> The maximum transfer size of the stedma40 is (64k-1) x data-width.
> If the transfer size of one element exceeds this limit
> the job is split up and sent as linked transfer.
>
> Signed-off-by: Per Forlin <per.forlin@...aro.org>

Acked-by: Linus Walleij <linus.walleij@...ricsson.com>

I think this could actually go into 2.6.37 series: I consider it
a bug fix since the transfer size limitation breaks the
contract of the memcpy() API.

Yours,
Linus Walleij
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