[PATCH] drm/i915/kvmgt: reset vgpu before VM leaves

[changbin.du at intel.com]

From: Changbin Du <changbin.du at intel.com>

When a vGPU is detached from VM, we should reset it to a clear state.
Now we reset it at intel_vgpu_release.

Signed-off-by: Changbin Du <changbin.du at intel.com>
---
 drivers/gpu/drm/i915/gvt/kvmgt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 1499421..7c1c882 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -577,6 +577,9 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu)
 					&vgpu->vdev.group_notifier);
 	WARN(ret, "vfio_unregister_notifier for group failed: %d\n", ret);
 
+	/* reset vgpu before before guest shutdown. */
+	intel_gvt_ops->vgpu_reset(vgpu);
+
 	info = (struct kvmgt_guest_info *)vgpu->handle;
 	kvmgt_guest_exit(info);
 
-- 
2.7.4