[PATCH 1/2] drm/i915/gvt: cancel virtual vblank timer when no vGPU exists

[Wang, Zhi A]

Reviewed-by: Zhi Wang <zhi.a.wang at intel.com>

-----Original Message-----
From: intel-gvt-dev [mailto:intel-gvt-dev-bounces at lists.freedesktop.org] On Behalf Of Zhenyu Wang
Sent: Monday, January 15, 2018 10:36 AM
To: intel-gvt-dev at lists.freedesktop.org
Subject: [PATCH 1/2] 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.

Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
 drivers/gpu/drm/i915/gvt/vgpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c index 4688619f6a1c..a8784fa91289 100644
--- 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);
--
2.15.1

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