Merge tag 'gvt-fixes-2022-11-11' of https://github.com/intel/gvt-linux into drm-intel-fixes

gvt-fixes-2022-11-11

- kvm reference fix from Sean

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221111090208.GQ30028@zhen-hp.sh.intel.com

Author: tursulin

drivers/gpu/drm/i915/gvt/kvmgt.c

@@ -664,8 +664,6 @@ static int intel_vgpu_open_device(struct vfio_device *vfio_dev)
 		return -ESRCH;
 	}
 
-	kvm_get_kvm(vgpu->vfio_device.kvm);
-
 	if (__kvmgt_vgpu_exist(vgpu))
 		return -EEXIST;
 
@@ -676,6 +674,7 @@ static int intel_vgpu_open_device(struct vfio_device *vfio_dev)
 
 	vgpu->track_node.track_write = kvmgt_page_track_write;
 	vgpu->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
+	kvm_get_kvm(vgpu->vfio_device.kvm);
 	kvm_page_track_register_notifier(vgpu->vfio_device.kvm,
 					 &vgpu->track_node);
 
@@ -715,15 +714,14 @@ static void intel_vgpu_close_device(struct vfio_device *vfio_dev)
 
 	kvm_page_track_unregister_notifier(vgpu->vfio_device.kvm,
 					   &vgpu->track_node);
+	kvm_put_kvm(vgpu->vfio_device.kvm);
+
 	kvmgt_protect_table_destroy(vgpu);
 	gvt_cache_destroy(vgpu);
 
 	intel_vgpu_release_msi_eventfd_ctx(vgpu);
 
 	vgpu->attached = false;
-
-	if (vgpu->vfio_device.kvm)
-		kvm_put_kvm(vgpu->vfio_device.kvm);
 }
 
 static u64 intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar)