From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Weird ahci init failure possibly caused by PCI layer Date: Wed, 28 Apr 2010 16:30:53 +0200 Message-ID: <4BD8469D.6080409@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:39782 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751093Ab0D1Oa5 (ORCPT ); Wed, 28 Apr 2010 10:30:57 -0400 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-pci@vger.kernel.org, Jesse Barnes Cc: Reinhard Max , "linux-ide@vger.kernel.org" Hello, Jesse. There is a pretty weird ahci init failure[1] reported by Reinhard Max against openSUSE 11.3 on Dell Optiplex 960[2]. It looks like something between the cpu and the controller isn't properly set up and register reads on the controller return garbage values. The problem appeared somewhere between 2.6.33 and 2.6.34-rc3 and is still present in -rc5. The following log from -rc3 seemed :-) relevant to me. <3>pci 0000:00:1f.2: no compatible bridge window for [mem 0xff970000-0xff9707ff] <4>Expanded resource reserved due to conflict with PCI Bus 0000:00 <7>reserve RAM buffer: 000000000009e400 - 000000000009ffff <7>reserve RAM buffer: 00000000cfdffc00 - 00000000cfffffff The full log from -rc3 is available[3]. Any ideas? Thanks. -- tejun [1] https://bugzilla.novell.com/show_bug.cgi?id=598520 [2] https://bugzillafiles.novell.org/attachment.cgi?id=356199 [3] https://bugzillafiles.novell.org/attachment.cgi?id=356197