The patch below does not apply to the 5.19-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);
}
