The patch below does not apply to the 6.0-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Possible dependencies:

f423fa1bc9fe ("drm/i915/gvt: Add missing vfio_unregister_group_dev() call") a5ddd2a99a7a ("drm/i915/gvt: Use the new device life cycle helpers")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From f423fa1bc9fe1978e6b9f54927411b62cb43eb04 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe jgg@ziepe.ca Date: Thu, 29 Sep 2022 14:48:35 -0300 Subject: [PATCH] drm/i915/gvt: Add missing vfio_unregister_group_dev() call

When converting to directly create the vfio_device the mdev driver has to put a vfio_register_emulated_iommu_dev() in the probe() and a pairing vfio_unregister_group_dev() in the remove.

This was missed for gvt, add it.

Cc: stable@vger.kernel.org Fixes: 978cf586ac35 ("drm/i915/gvt: convert to use vfio_register_emulated_iommu_dev") Reported-by: Alex Williamson alex.williamson@redhat.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com Reviewed-by: Kevin Tian kevin.tian@intel.com Reviewed-by: Christoph Hellwig hch@lst.de Link: https://lore.kernel.org/r/0-v1-013609965fe8+9d-vfio_gvt_unregister_jgg@nvidi... Signed-off-by: Alex Williamson alex.williamson@redhat.com

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 41bba40feef8..9003145adb5a 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -1615,6 +1615,7 @@ static void intel_vgpu_remove(struct mdev_device *mdev) if (WARN_ON_ONCE(vgpu->attached)) return;

+ vfio_unregister_group_dev(&vgpu->vfio_device); vfio_put_device(&vgpu->vfio_device); }