linux-kernel - Re: [PATCH] sata_nv: don't use legacy DMA in ADMA mode (v3)

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Message-ID: <474A2D65.2090302@gmail.com>
Date:	Mon, 26 Nov 2007 11:20:21 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Robert Hancock <hancockr@...w.ca>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	ide <linux-ide@...r.kernel.org>, Jeff Garzik <jeff@...zik.org>
Subject: Re: [PATCH] sata_nv: don't use legacy DMA in ADMA mode (v3)

Robert Hancock wrote:
> We need to run any DMA command with result taskfile requested in ADMA mode
> when the port is in ADMA mode, otherwise it may try to use the legacy DMA engine
> in ADMA mode which is not allowed. Enforce this with BUG_ON() since data
> corruption could potentially result if this happened. Also, fail any attempt to
> try and issue NCQ commands with result taskfile requested, since the hardware
> doesn't allow this.
> 
> Signed-off-by: Robert Hancock <hancockr@...w.ca>

Acked-by: Tejun Heo <htejun@...il.com>

Thanks.

-- 
tejun
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