Make sure we don't leak half-initialized fences outside the driver.
Signed-off-by: Gerd Hoffmann kraxel@redhat.com --- drivers/gpu/drm/virtio/virtgpu_fence.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/virtio/virtgpu_fence.c b/drivers/gpu/drm/virtio/virtgpu_fence.c index a0514f5bd006..a4b9881ca1d3 100644 --- a/drivers/gpu/drm/virtio/virtgpu_fence.c +++ b/drivers/gpu/drm/virtio/virtgpu_fence.c @@ -41,6 +41,10 @@ bool virtio_fence_signaled(struct dma_fence *f) { struct virtio_gpu_fence *fence = to_virtio_fence(f);
+ if (WARN_ON_ONCE(fence->f.seqno == 0)) + /* leaked fence outside driver before completing + * initialization with virtio_gpu_fence_emit */ + return false; if (atomic64_read(&fence->drv->last_seq) >= fence->f.seqno) return true; return false;