Re: [PATCH] iommu/s390: tolerate repeat attach_dev calls

[Joerg Roedel]

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@xxxxxxxxxxxxx>
> ---
>  drivers/iommu/s390-iommu.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)

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