From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: sata dvdroms fails to be recognized by MCP55 controller with the 2.6.26.5 kernel Date: Sat, 04 Oct 2008 16:27:40 +0900 Message-ID: <48E71AEC.8020701@gmail.com> References: <64630f150809291601w3511febdyc769b8871db75602@mail.gmail.com> <20080930170849.52c00228.akpm@linux-foundation.org> <48E2E8A1.8090204@gmail.com> <64630f150810010131g18c1a00m91b3f68ea29a1067@mail.gmail.com> <64630f150810011601y4e729decq24c614f0b7994f3f@mail.gmail.com> <48E71ACE.4000505@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from ti-out-0910.google.com ([209.85.142.190]:33341 "EHLO ti-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751636AbYJDH3H (ORCPT ); Sat, 4 Oct 2008 03:29:07 -0400 Received: by ti-out-0910.google.com with SMTP id b6so910763tic.23 for ; Sat, 04 Oct 2008 00:29:05 -0700 (PDT) In-Reply-To: <48E71ACE.4000505@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: gettinther Cc: Linux Kernel Mailing List , IDE/ATA development list (restoring lkml and linux-ide. please don't drop cc list) Tejun Heo wrote: > Hello, > > gettinther wrote: >> 00:05.2 IDE interface: GeForce 8800 GT 512 MCP55 SATA Controller (rev >> a2) (prog-if 85 [Master SecO PriO]) > > Ah.. okay. MCP55. I've missed that part in the first message. > sata_nv is a bit messed up for 2.6.26. What happened was... > > * During 2.6.26-rc, libata switched to prefer hardreset over softreset > for various reasons. > > * After 2.6.26 release, sata_nv generic flavors (MCP55/66) were > reported to have problems probing devices with hardreset. Hardreset > simply doesn't work. > > * Patch posted to disable hardreset for generic but it accidentally > disabled hardreset for all flavors (generic/nf2/3/ck804). > > * Which broke ck804. > > * Another patch posted to reinstate hardreset for nf2/3 and ck804. > > * It somehow mysteriously broke nf2/3. This is still being > investigated. > > Sorry about the mess but I am puzzled too. I'll report back when I > know more. > > Thanks. > -- tejun