From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753417Ab1KUNJW (ORCPT ); Mon, 21 Nov 2011 08:09:22 -0500 Received: from ackle.nomi.cz ([81.31.33.35]:58412 "EHLO ackle.nomi.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751299Ab1KUNJU (ORCPT ); Mon, 21 Nov 2011 08:09:20 -0500 Date: Mon, 21 Nov 2011 14:09:16 +0100 From: =?utf-8?B?VG9tw6HFoSBKYW5vdcWhZWs=?= To: Stanislaw Gruszka Cc: linux-kernel@vger.kernel.org, Wey-Yi Guy , linux-wireless@vger.kernel.org Subject: Re: iwlagn: memory corruption with WPA enterprise Message-ID: <20111121130916.GA11136@nomi.cz> References: <20111110091816.GA2247@nomi.cz> <20111110114732.GA2217@redhat.com> <20111110125347.GA29415@nomi.cz> <20111110160703.GA2775@redhat.com> <20111110163051.GA24533@nomi.cz> <20111111054731.GA2292@redhat.com> <20111111150105.GA25437@nomi.cz> <20111114140714.GD2513@redhat.com> <20111119181106.GA5515@nomi.cz> <20111121130527.GA4010@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20111121130527.GA4010@redhat.com> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Mon, Nov 21, 2011 at 02:05:28PM +0100, Stanislaw Gruszka wrote: > The farther we get the problem is more and more strange. > > Device that write to wrong address, would generate: > > DMAR:[DMA Write] Request device [00:02.0] fault addr 6df084000 > DMAR:[fault reason 05] PTE Write access is not set And that's exactly what happens if I don't disable firewire-ohci, because of that stupid Ricoh multifunction blah blah issue. > But only if > > PCI-DMA: Using DMAR IOMMU > > was printed in dmesg before. DMAR can be disabled by graphics > driver, or maybe by other drivers too. Then above print will > be missed in dmesg and protection would not work. > > Try "dmesg | grep DMAR" to see if DMA remapping is really is > in use. Well, this message is not printed, but as I said, loading firewire-ohci triggers DMAR faults, so it should be in use anyway. -- Tomáš Janoušek, a.k.a. Liskni_si, http://work.lisk.in/