Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751665AbcKQVlp (ORCPT ); Thu, 17 Nov 2016 16:41:45 -0500 Received: from 8bytes.org ([81.169.241.247]:51549 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750751AbcKQVln (ORCPT ); Thu, 17 Nov 2016 16:41:43 -0500 Date: Thu, 17 Nov 2016 22:41:41 +0100 From: Joerg Roedel To: Mark Hounschell Cc: iommu@lists.linux-foundation.org, Linux-kernel Subject: Re: BUG at drivers/iommu/amd_iommu.c:1436! Message-ID: <20161117214141.GC2078@8bytes.org> References: <838275de-6cac-93d8-ca04-54b06a24b3d4@compro.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <838275de-6cac-93d8-ca04-54b06a24b3d4@compro.net> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 353 Lines: 14 Hi Mark, On Thu, Nov 17, 2016 at 02:13:59PM -0500, Mark Hounschell wrote: > Kernel version is 4.8.0. No failure when the IOMMU is disabled. This > is an out of tree GPL driver using > pci_alloc_consistent/pci_free_consistent. The free causes this. Can you please run the driver with dma-api debugging enabled? Does it trigger any warnings? Joerg