From: Tejun Heo <htejun@gmail.com>
To: Robert Hancock <hancockr@shaw.ca>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
ide <linux-ide@vger.kernel.org>, Jeff Garzik <jeff@garzik.org>
Subject: Re: [PATCH] sata_nv: don't use legacy DMA in ADMA mode (v3)
Date: Mon, 26 Nov 2007 11:20:21 +0900 [thread overview]
Message-ID: <474A2D65.2090302@gmail.com> (raw)
In-Reply-To: <4749FE58.4060800@shaw.ca>
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@shaw.ca>
Acked-by: Tejun Heo <htejun@gmail.com>
Thanks.
--
tejun
next prev parent reply other threads:[~2007-11-26 2:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-25 22:59 [PATCH] sata_nv: don't use legacy DMA in ADMA mode (v3) Robert Hancock
2007-11-26 2:20 ` Tejun Heo [this message]
2007-12-04 19:02 ` Jeff Garzik
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