linux-kernel - Re: [PATCH 2/2] iommu/vt-d: Helper function to query if a pasid has any active users

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Date:   Wed, 17 May 2017 14:59:23 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Ashok Raj <ashok.raj@...el.com>
Cc:     linux-kernel@...r.kernel.org, CQ Tang <cq.tang@...el.com>,
        linux-pci@...r.kernel.org,
        Jean-Phillipe Brucker <jean-philippe.brucker@....com>,
        iommu@...ts.linux-foundation.org
Subject: Re: [PATCH 2/2] iommu/vt-d: Helper function to query if a pasid has
 any active users

On Wed, May 10, 2017 at 11:39:03AM -0700, Ashok Raj wrote:
> From: CQ Tang <cq.tang@...el.com>
> 
> A driver would need to know if there are any active references to a
> a PASID before cleaning up its resources. This function helps check
> if there are any active users of a PASID before it can perform any
> recovery on that device.
> 
> To: Joerg Roedel <joro@...tes.org>
> To: linux-kernel@...r.kernel.org
> To: David Woodhouse <dwmw2@...radead.org>
> Cc: Jean-Phillipe Brucker <jean-philippe.brucker@....com>
> Cc: iommu@...ts.linux-foundation.org
> 
> Signed-off-by: CQ Tang <cq.tang@...el.com>
> Signed-off-by: Ashok Raj <ashok.raj@...el.com>
> ---
>  drivers/iommu/intel-svm.c | 30 ++++++++++++++++++++++++++++++
>  include/linux/intel-svm.h | 20 ++++++++++++++++++++
>  2 files changed, 50 insertions(+)

Applied, thanks.