Message-ID: <494B86CD.4060305@ru.mvista.com>
Date: Fri, 19 Dec 2008 14:34:37 +0300
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
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To: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
       Jeff Garzik <jeff@garzik.org>,
       Mario Schwalbe <schwalbe@inf.tu-dresden.de>,
       linux-kernel@vger.kernel.org,
       Linux IDE mailing list <linux-ide@vger.kernel.org>
Subject: Re: [PATCH] ide: Fix ata_id_has_dword_io to return DWORD I/O support
 properly
References: <494A5BBF.8000807@inf.tu-dresden.de>	<494A837A.50801@garzik.org>	<494A8768.4080100@ru.mvista.com>	<200812182142.16533.bzolnier@gmail.com> <20081218224010.45e3ce55@lxorguk.ukuu.org.uk> <494B8617.3020808@ru.mvista.com>
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Hello, I just wrote:

>> I remain unconvinced we should be looking at it anywhere except specific
>> pure ISA cycle pass through hardware and thus it belongs as a helper for
>>   
>
>   I'm still not getting how drive can support or not support "DWORD 
> I/O" -- you certainly can't have 32-bit I/O cycle on ISA (only on 
> EISA) and you certainly cannot translate 32-bit cycle to the ATA bus. 
> I remember I had some hypotheses before but they turned out to be 
> inconsistent.

   If only two back-to-back I/O cycles weren't providing enough recovery 
time...

MBR, Sergei


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