From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: [PATCH] ide: Fix ata_id_has_dword_io to return DWORD I/O support properly Date: Fri, 19 Dec 2008 14:34:37 +0300 Message-ID: <494B86CD.4060305@ru.mvista.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from h155.mvista.com ([63.81.120.155]:51305 "EHLO imap.sh.mvista.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751043AbYLSLen (ORCPT ); Fri, 19 Dec 2008 06:34:43 -0500 In-Reply-To: <494B8617.3020808@ru.mvista.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Sergei Shtylyov Cc: Alan Cox , Bartlomiej Zolnierkiewicz , Jeff Garzik , Mario Schwalbe , linux-kernel@vger.kernel.org, Linux IDE mailing list 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