Date: Wed, 6 Jun 2007 17:34:52 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Jeff Garzik <jeff@garzik.org>
Cc: Tejun Heo <htejun@gmail.com>, Mikael Pettersson <mikpe@it.uu.se>,
       akpm@linux-foundation.org, david@dgreaves.com,
       jean.luc.coulon@gmail.com, jgarzik@pobox.com,
       michal.k.k.piotrowski@gmail.com, torvalds@linux-foundation.org,
       linux-kernel@vger.kernel.org
Subject: Re: [REPOST PATCH] sata_promise: use TF interface for polling
 NODATA commands
Message-ID: <20070606173452.27e0a0c3@the-village.bc.nu>
In-Reply-To: <20070606160511.GA23143@havoc.gtf.org>
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	<46665AB5.6040508@gmail.com>
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	<20070606160511.GA23143@havoc.gtf.org>
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On Wed, 6 Jun 2007 12:05:11 -0400
Jeff Garzik <jeff@garzik.org> wrote:

> 
> FYI to all -- 
> 
> As a reminder. the Promise hardware programs registers when it receives
> a SET FEATURES - XFER MODE.
> 
> If data transfer is occurring on OTHER ports at the time this is issued,
> then data corruption is guaranteed to occur.  Polling will not fix this
> problem -- all ports need to be inactive, when a SET FEATURES - XFER
> MODE command is issued for any port.

Cool - will whoever makes that work drop me a note as I need to do the
same eventually for a couple of other controllers.
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