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@xxxxxxxxxxxxxxx>. 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@xxxxxxxx> 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@xxxxxxxxxxxxxxx Fixes: 978cf586ac35 ("drm/i915/gvt: convert to use vfio_register_emulated_iommu_dev") Reported-by: Alex Williamson <alex.williamson@xxxxxxxxxx> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Link: https://lore.kernel.org/r/0-v1-013609965fe8+9d-vfio_gvt_unregister_jgg@xxxxxxxxxx Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> 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); }