linux-kernel - Re: [PATCH 0/2] iommu/vt-d: Keep RMRR mappings around on driver unbind

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Message-ID: <20141001223510.GB12989@kroah.com>
Date:	Wed, 1 Oct 2014 15:35:10 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Joerg Roedel <joro@...tes.org>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	jroedel@...e.de
Subject: Re: [PATCH 0/2] iommu/vt-d: Keep RMRR mappings around on driver
 unbind

On Tue, Sep 30, 2014 at 01:02:01PM +0200, Joerg Roedel wrote:
> Hi,
> 
> here is a patch-set to fix an issue recently discovered when
> the Intel IOMMU is in use with devices that need RMRR
> mappings.
> 
> The problem is that the RMRR mappings are destroyed when the
> device driver is unbound from the device, causing DMAR
> faults.
> 
> To solve this problem a device driver core change is
> necessary to catch the right point in time for the IOMMU
> code to destroy any mappings for a device.
> 
> With this patch-set the RMRR mappings are only destroyed
> when the device is actually removed from the system.
> 
> Please review.

I have no objection to these, do you want me to take them through my
tree?  Or if they are going through some other one feel free to add:

	Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

To the first patch.

thanks,

greg k-h
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