linux-kernel - Re: [async_tx-next PATCH 2/2] fsldma: Fix cookie issues

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Date:	Mon, 22 Feb 2010 21:26:13 +0100 (CET)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	"Steven J. Magnani" <steve@...idescorp.com>
cc:	Dan Williams <dan.j.williams@...el.com>,
	Zhang Wei <zw@...kernel.org>, Li Yang <leoli@...escale.com>,
	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Subject: Re: [async_tx-next PATCH 2/2] fsldma: Fix cookie issues

On Mon, 22 Feb 2010, Steven J. Magnani wrote:

> diff -uprN a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> --- a/include/linux/dmaengine.h	2010-02-22 11:18:11.000000000 -0600
> +++ b/include/linux/dmaengine.h	2010-02-22 11:18:30.000000000 -0600
> @@ -31,6 +31,8 @@
>   * if dma_cookie_t is >0 it's a DMA request cookie, <0 it's an error code
>   */
>  typedef s32 dma_cookie_t;
> +#define DMA_MIN_COOKIE	1
> +#define DMA_MAX_COOKIE	2147483647

Taking into account, that dma_cookie_t is 32 bits:

+#define DMA_MAX_COOKIE		((1 << 31) - 1)

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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