Subject: Re: [PATCH linux-2.6-block:post-2.6.15 09/10] blk: add FUA support
	to IDE
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Tejun Heo <htejun@gmail.com>, axboe@suse.de, jgarzik@pobox.com,
       James.Bottomley@steeleye.com, linux-kernel@vger.kernel.org
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Date: Fri, 18 Nov 2005 17:41:18 +0000
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On Gwe, 2005-11-18 at 17:38 +0100, Bartlomiej Zolnierkiewicz wrote:
> On 11/18/05, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > On Gwe, 2005-11-18 at 17:17 +0100, Bartlomiej Zolnierkiewicz wrote:
> > > Probably it should work fine given that drive->mult_count is on.
> > >
> > > The only controller using drive->vdma in the current tree is cs5520
> > > so you should confirm this with Mark Lord & Alan Cox.
> >
> > The CS5520 VDMA performs PIO commands with controller driven DMA to PIO
> > of the data blocks. Thus it can do any PIO command with one data in or
> > out phase as if it were DMA.
> 
> Therefore doing ATA_CMD_WRITE_MULTI_FUA_EXT w/ VDMA
> should be just fine as is WIN_WRITE_EXT w/ VDMA currently?

As I understand it yes

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