From 84f6fec42e9e66578bb63263cb5bb8407b0ca936 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Wed, 4 Sep 2019 09:48:28 +0200
Subject: drm/virtio: fix command submission with objects but without fence.
Git-commit: 84f6fec42e9e66578bb63263cb5bb8407b0ca936
Patch-mainline: v5.5-rc1
References: bsc#1152489

Only call virtio_gpu_array_add_fence if we actually have a fence.

Fixes: da758d51968a ("drm/virtio: rework virtio_gpu_execbuffer_ioctl fencing")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190904074828.32502-1-kraxel@redhat.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/virtio/virtgpu_vq.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 595fa6ec2d58..7fd2851f7b97 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -339,11 +339,12 @@ static void virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,
 		goto again;
 	}
 
-	if (fence)
+	if (fence) {
 		virtio_gpu_fence_emit(vgdev, hdr, fence);
-	if (vbuf->objs) {
-		virtio_gpu_array_add_fence(vbuf->objs, &fence->f);
-		virtio_gpu_array_unlock_resv(vbuf->objs);
+		if (vbuf->objs) {
+			virtio_gpu_array_add_fence(vbuf->objs, &fence->f);
+			virtio_gpu_array_unlock_resv(vbuf->objs);
+		}
 	}
 	notify = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf);
 	spin_unlock(&vgdev->ctrlq.qlock);
-- 
2.28.0