drm/i915/gvt: cancel virtual vblank timer when no vGPU exists

Stop irq timer for virtual vblank timer emulation if no vGPU exists,
otherwise it will keep gvt service thread busy to handle virtual vblank
but no use.

Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 4688619f6a1cabd86b6e72e2d85960b6e5f8aa35..a8784fa91289c82d442f6b90cb13fb4f837fe7b3 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -258,6 +258,8 @@ void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
 
        intel_gvt_debugfs_remove_vgpu(vgpu);
        idr_remove(&gvt->vgpu_idr, vgpu->id);
+       if (idr_is_empty(&gvt->vgpu_idr))
+               intel_gvt_clean_irq(gvt);
        intel_vgpu_clean_sched_policy(vgpu);
        intel_vgpu_clean_submission(vgpu);
        intel_vgpu_clean_display(vgpu);