From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Art Haas" Subject: Re: PATA ATAPI detection debug Date: Tue, 23 Jan 2007 07:55:23 -0600 Message-ID: <20070123135523.GA3961@artsapartment.org> References: <45AB36B0.2050702@gmail.com> <45B5AB6B.5070903@gmail.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="J/dobhs11T7y2rNN" Return-path: Received: from ms-smtp-01.texas.rr.com ([24.93.47.40]:46687 "EHLO ms-smtp-01.texas.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965135AbXAWNzZ (ORCPT ); Tue, 23 Jan 2007 08:55:25 -0500 Received: from pcdebian (cpe-68-201-223-150.houston.res.rr.com [68.201.223.150]) by ms-smtp-01.texas.rr.com (8.13.6/8.13.6) with ESMTP id l0NDtNTK009734 for ; Tue, 23 Jan 2007 07:55:24 -0600 (CST) Content-Disposition: inline In-Reply-To: <45B5AB6B.5070903@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: linux-ide@vger.kernel.org --J/dobhs11T7y2rNN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Jan 23, 2007 at 03:30:03PM +0900, Tejun Heo wrote: > Tejun Heo wrote: > > Hello, all. > > > > Many people have been reporting libata PATA ATAPI detection problem. In > > many but not all cases, the ATAPI device was occupying the slave slot > > while a disk drive occupies the master slot. Based on that and J. > > Taimr's nullify freeze on via fix, I made a cocktail patch which > > contained four different fixes and it seemed to have fixed the problem > > for (at least) several people, but the reports are not all consistent. > > > > The attached patches contain the same four fixes but has a selector > > parameter to enable each fix separately. Both are equivalent but using > > 2.6.20-rc5 is recommended to rule out detection problems fixed by > > polling IDENTIFY. > > > > If your libata driver is compiled into the kernel, add > > 'libata.debug_cocktail=N' to your kernel parameter. If you compile > > libata.ko as module, add 'debug_cocktail=N' module parameter to the > > module parameter. e.g. 'modprobe libata.ko debug_cocktail=1'. > > Daniel Fraga and Sero's cases are different issue while I can't > determine whether J. Taimr's case is limted on via chipset. So, I need > more input to proceed. > > *Please* test and report the results. > > Thanks. > > -- > tejun Hi. I got a chance to test your patches yesterday. Enclosed is the 'dmesg' output for tests of 'debug_cocktail' values of 1,2,4,8,5,9,6, and 10. My machine booted successfully each time, but the CD-ROM drive was never detected. Sorry it took a while to get to testing. Hope the enclosed info provides you with useful clues in solving the problem. Art Haas -- Man once surrendering his reason, has no remaining guard against absurdities the most monstrous, and like a ship without rudder, is the sport of every wind. -Thomas Jefferson to James Smith, 1822 --J/dobhs11T7y2rNN Content-Type: application/octet-stream Content-Disposition: attachment; filename="debug_dmesg.tar.gz" Content-Transfer-Encoding: base64 H4sICG1LtUUAA2RlYnVnX2RtZXNnLnRhcgDtnHt32siSwOdvfYraufds8KzBaj0As5s5F79m uDEO1zh3cnY2x0dIwmgsJEYSjp1Pv1XdEmAbhDO2E4dUJweDVFX9qq5+6Hfkjf304jwSPzxj 0jHVLUv+xXTnr2HjzR+Ebtu2YaGg8YMuhKEbP4D+nIUq0jTNnATghySOszK5dfe/0XQcRNNr uPKTNIgjMGr1mqFXE9euOn+MoOIk2egfE9fzB4ETbUHlwnVnslZN1AwwsMeEEDZUJomf+KHv pD4KHkgNKSOqhtjagr8Z0EWtf+JVwwBhtwyjZTVgv39GNhraXudtvzpJ4qvA8z2YjG7SwHVC OG13YexMWlrqREEWfPKB+iub//QjT3Pjyc253zT0cxStbCmRFuh3EqSocOuyIy+jiSVXs5sJ Cot7xuk6BCkc0iUs3gNyHy7PXSzLXegLuRvrjYtlVRNDf3jfuBgOh09atZnBe1XTzaW5m/Pc rYcYN5cb9+4ZN/K/uXFznfHhypLf7xSh3zZuaCCdlawvcbLqfVeqTFNnEPpbqxSH9xTzXq0k 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