From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753932Ab0EVK03 (ORCPT ); Sat, 22 May 2010 06:26:29 -0400 Received: from einhorn.in-berlin.de ([192.109.42.8]:60818 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751475Ab0EVK00 (ORCPT ); Sat, 22 May 2010 06:26:26 -0400 X-Envelope-From: stefanr@s5r6.in-berlin.de Message-ID: <4BF7B147.9020502@s5r6.in-berlin.de> Date: Sat, 22 May 2010 12:26:15 +0200 From: Stefan Richter User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.1.23) Gecko/20100415 SeaMonkey/1.1.18 MIME-Version: 1.0 To: linux-pci@vger.kernel.org CC: linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: DMAR:[fault reason 02] Present bit in context entry is clear (firewire-ohci) X-Enigmail-Version: 0.96.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I came across a report of the subject message. What does it mean; what type of bug should be look for? https://bugzilla.redhat.com/show_bug.cgi?id=587178 >>> firewire_ohci 0000:04:00.4: PCI INT C -> GSI 16 (level, low) -> IRQ 16 firewire_ohci 0000:04:00.4: setting latency timer to 64 firewire_ohci: Added fw-ohci device 0000:04:00.4, OHCI version 1.0 DRHD: handling fault status reg 2 DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000 DMAR:[fault reason 02] Present bit in context entry is clear DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000 DMAR:[fault reason 02] Present bit in context entry is clear DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000 DMAR:[fault reason 02] Present bit in context entry is clear <<< The log sounds as if this happens during from-device DMA of 04:00.4 into a consistent buffer, yet the fault is logged for device 04:00.0. The log is from a Dell M4500. The devices are, according to a web search, 04:00.0 CardBus bridge [0607]: Ricoh Co Ltd Device [1180:e476] (rev 02) 04:00.4 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd Device [1180:e832] (rev 03) (prog-if 10) Thanks for any hint, -- Stefan Richter -=====-==-=- -=-= =-==- http://arcgraph.de/sr/