linux-kernel - Re: BUG at drivers/iommu/amd

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Message-ID: <f4ababc2-64bf-fd0e-1d18-cb5963d23eb1@compro.net>
Date:   Thu, 17 Nov 2016 16:53:24 -0500
From:   Mark Hounschell <markh@...pro.net>
To:     Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux-foundation.org,
        Linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: BUG at drivers/iommu/amd_iommu.c:1436!

On 11/17/2016 04:41 PM, Joerg Roedel wrote:
> 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?
>

It's been a while since I've done that for ya. Kernel config options? 
Kernel cmd line you want?

Mark