[PATCH 5.7 060/124] drm/virtio: fix missing dma_fence_put() in virtio_gpu_execbuffer_ioctl()

[Greg Kroah-Hartman]

From: Qi Liu <liuqi.16@xxxxxxxxxxxxx>

[ Upstream commit 8b6ec999b198b59ae61e86e70f5e9df73fe4754f ]

We should put the reference count of the fence after calling
virtio_gpu_cmd_submit(). So add the missing dma_fence_put().

Fixes: 2cd7b6f08bc4 ("drm/virtio: add in/out fence support for explicit synchronization")
Co-developed-by: Xin He <hexin.op@xxxxxxxxxxxxx>
Signed-off-by: Xin He <hexin.op@xxxxxxxxxxxxx>
Signed-off-by: Qi Liu <liuqi.16@xxxxxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20200721101647.42653-1-hexin.op@xxxxxxxxxxxxx
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index 512daff920387..1fc3fa00685d0 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -180,6 +180,7 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
 
 	virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
 			      vfpriv->ctx_id, buflist, out_fence);
+	dma_fence_put(&out_fence->f);
 	virtio_gpu_notify(vgdev);
 	return 0;
 
-- 
2.25.1