From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: [PATCH 1/1] libata-dev: ata_check_atapi_dma() fix for ATA_FLAG_PIO_POLLING LLDDs Date: Wed, 15 Mar 2006 11:12:10 -0500 Message-ID: <44183CDA.5010407@rtr.ca> References: <441525DB.40905@tw.ibm.com> <441528BD.8070708@pobox.com> <44164C25.10106@tw.ibm.com> <441838B6.8060900@rtr.ca> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------040401070903070708070808" Return-path: Received: from rtr.ca ([64.26.128.89]:22429 "EHLO mail.rtr.ca") by vger.kernel.org with ESMTP id S1750944AbWCOQMP (ORCPT ); Wed, 15 Mar 2006 11:12:15 -0500 In-Reply-To: <441838B6.8060900@rtr.ca> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: albertl@mail.com Cc: Jeff Garzik , IDE Linux , Tejun Heo , Doug Maxey This is a multi-part message in MIME format. --------------040401070903070708070808 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Albert Lee wrote: > Jeff Garzik wrote: > >> Applied, though I think its an open question what happens with >> CDB-interrupt ATAPI devices want to do DMA. Perhaps we just get an >> interrupt event that we clear, then life proceeds as normal. > > Not sure. I have no such device at hand for test; currently relying > on the SFF-8020i spec (http://www.bswd.com/sff8020i.pdf) as reference. > According to p.31, we have to send out the CDB after receiving > the CDB interrupt. So, just clearing the irq looks not enough. > >> Does anybody actually have such a device anywhere? :) Yup, I have two such drives here. One of them has a grease-pencil "NFG" marking on it, and other other one doesn't. They both powered up and worked just now, and their identify blobs are attached (you can interpret them with "hdparm --Istdin