From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: 2.6.34-rc2 breaks via82cxxx Host Protected Area Date: Fri, 26 Mar 2010 20:12:26 -0400 Message-ID: <4BAD4D6A.3010004@garzik.org> References: <20100326232104.GA10769@spacedout.fries.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-iw0-f196.google.com ([209.85.223.196]:39926 "EHLO mail-iw0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751230Ab0C0AM3 (ORCPT ); Fri, 26 Mar 2010 20:12:29 -0400 In-Reply-To: <20100326232104.GA10769@spacedout.fries.net> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: David Fries Cc: Bartlomiej Zolnierkiewicz , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org On 03/26/2010 07:21 PM, David Fries wrote: > The kernel fails to see the entire disk with 2.6.34-rc2 with VIA > vt82c586b chipset. I tracked it down to commit > f931a5d5785d7b7c44871bd7ad2762e29dfddf29 "via82cxxx: workaround h/w > bugs" and reverting just that one solves the problem, or just > commenting out just one outb write in that change. > > via82cxxx 0000:00:07.1: VIA vt82c586b (rev 41) IDE UDMA33 > via82cxxx 0000:00:07.1: IDE controller (0x1106:0x0571 rev 0x06) > via82cxxx 0000:00:07.1: not 100% native mode: will probe irqs later > > Note the kernel panic is intentional as I'm given the test kernel an > invalid root device, so that I can suspend to disk, try a kernel, > resume and pick up where I left off. It does have a side benefit of > dumping the size of all partitions. > > 2.6.34-rc2 unmodified, fails and sees 30985416 KiB for the last > partition. > ide-gd driver 1.18 > hda: max request size: 128KiB > hda: 66055248 sectors (33820 MB) w/7936KiB Cache, CHS=65531/16/63 > hda: cache flushes supported > hda: hda1 hda2 hda3 > hda: p3 size 236037312 exceeds device capacity, enabling native capacity > hda: p3 size 236037312 exceeds device capacity, limited to end of disk > ide-cd driver 5.00 > ... > Please append a correct "root=" boot option; here are the available partitions: > 0300 33027624 hda driver: ide-gd > 0301 49391 hda1 > 0302 1992816 hda2 > 0303 30985416 hda3 > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(22,2) > > 2.6.34-rc2 with patch revered, correct size 118018656 > ide-gd driver 1.18 > hda: max request size: 128KiB > hda: Host Protected Area detected. > current capacity is 66055248 sectors (33820 MB) > native capacity is 240121728 sectors (122942 MB) > hda: 66055248 sectors (33820 MB) w/7936KiB Cache, CHS=65531/16/63 > hda: cache flushes supported > hda: hda1 hda2 hda3 > hda: p3 size 236037312 exceeds device capacity, enabling native capacity > hda: detected capacity change from 33820286976 to 122942324736 > ide-cd driver 5.00 > 0300 120060864 hda driver: ide-gd > 0301 49391 hda1 > 0302 1992816 hda2 > 0303 118018656 hda3 > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(22,2) > > Here are two debug patches, the first adds debug prints and the second > disables the problematic write, I have the output of both included. > >> From dac7d14ce1f227d8a084c3ec218ea1430bffdc57 Mon Sep 17 00:00:00 2001 > From: David Fries > Date: Thu, 25 Mar 2010 19:51:31 -0500 > Subject: [PATCH 1/2] fails: add print messages > > add print messages for debugging > --- > drivers/ide/via82cxxx.c | 5 +++++ > 1 files changed, 5 insertions(+), 0 deletions(-) Does libata + pata_via work, if you pass ignore_hpa=1 module option to libata? Jeff