From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bartlomiej Zolnierkiewicz Subject: Re: 2.6.32: Promise UDMA33 card refuses to work in UDMA mode Date: Mon, 4 Jan 2010 18:49:19 +0100 Message-ID: <201001041849.19591.bzolnier@gmail.com> References: <20091224181300.GA4654@flint.arm.linux.org.uk> <20100104172816.GD18335@flint.arm.linux.org.uk> <20100104173958.28439d63@lxorguk.ukuu.org.uk> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ew0-f219.google.com ([209.85.219.219]:41485 "EHLO mail-ew0-f219.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752392Ab0ADRuk (ORCPT ); Mon, 4 Jan 2010 12:50:40 -0500 Received: by ewy19 with SMTP id 19so7543936ewy.21 for ; Mon, 04 Jan 2010 09:50:39 -0800 (PST) In-Reply-To: <20100104173958.28439d63@lxorguk.ukuu.org.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: Russell King , linux-ide@vger.kernel.org On Monday 04 January 2010 06:39:58 pm Alan Cox wrote: > > Firstly, icside shares its two IDE channels with one DMA engine - so it's > > a simplex interface. IDE supports those (or did when the code was written) > > serializing requests between the two interfaces. libata does not. > > Libata does the driver may not. IIRC it didn't at the time pata_icside was written. -- Bartlomiej Zolnierkiewicz