From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markku Pesonen Subject: Re: pata_atiixp regression in 4.11-rc1 Date: Tue, 28 Mar 2017 12:57:42 +0300 Message-ID: References: <22571b6e-a8f3-05bc-d68b-a728f595af1d@gmail.com> <20170327175550.GB13353@htj.duckdns.org> <49cdecb0846.6a8a0888@auth.smtp.1and1.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wr0-f195.google.com ([209.85.128.195]:35975 "EHLO mail-wr0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754846AbdC1J6A (ORCPT ); Tue, 28 Mar 2017 05:58:00 -0400 Received: by mail-wr0-f195.google.com with SMTP id u1so21106780wra.3 for ; Tue, 28 Mar 2017 02:57:54 -0700 (PDT) In-Reply-To: <49cdecb0846.6a8a0888@auth.smtp.1and1.co.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Darren Stevens Cc: Tejun Heo , linux-ide@vger.kernel.org On 28.03.2017 11:24, Darren Stevens wrote: > Hello Tejun > > On 27/03/2017, Tejun Heo wrote: >> From a431ecd2d459da3c91a612061f09eb422ffe78e2 Mon Sep 17 00:00:00 2001 >> From: Tejun Heo >> Date: Mon, 27 Mar 2017 13:52:00 -0400 >> Subject: [PATCH] Revert "pata_atiixp: Don't use unconnected secondary >> port on SB600/SB700" >> >> This reverts commit 5946fdaee4ba449e8fbb5d403e1ed69437f916e8. >> >> The original commit's assumption that the secondary port is >> unconnected turns out to be false. > > Not entirely. I based my patch on information in AMD's document > 43366_sb7xx_bdg_pub_1.00.p I found this in the AMD SB710 Databook, rev 1.60, p. 56: "The integrated parallel ATA controller contains a single channel but can be configured as primary or secondary channel." The IDE connector on my Asrock 980DE3/U3S3 motherboard is configured as the secondary channel. The primary channel is used by the optional SATA-IDE emulation mode. I don't know much about kernel programming, southbridges, or ata controllers, but I hope this bit of information helps.