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Date:   Fri, 20 May 2022 09:57:44 +0200
From:   Joerg Roedel <joro@8bytes.org>
To:     Matthew Rosato <mjrosato@linux.ibm.com>
Cc:     jgg@nvidia.com, will@kernel.org, alex.williamson@redhat.com,
        cohuck@redhat.com, borntraeger@linux.ibm.com,
        schnelle@linux.ibm.com, gerald.schaefer@linux.ibm.com,
        farman@linux.ibm.com, iommu@lists.linux-foundation.org,
        linux-s390@vger.kernel.org, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/s390: tolerate repeat attach_dev calls
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References: <20220519182929.581898-1-mjrosato@linux.ibm.com>
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On Thu, May 19, 2022 at 02:29:29PM -0400, Matthew Rosato wrote:
> Since commit 0286300e6045 ("iommu: iommu_group_claim_dma_owner() must
> always assign a domain") s390-iommu will get called to allocate multiple
> unmanaged iommu domains for a vfio-pci device -- however the current
> s390-iommu logic tolerates only one.  Recognize that multiple domains can
> be allocated and handle switching between DMA or different iommu domain
> tables during attach_dev.
> 
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
> ---
>  drivers/iommu/s390-iommu.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)

Applied to the vfio-notifier-fix topic branch, thanks.