[Nouveau] [PATCH 2/6] drm/nouveau: Add nouveau_fence_ref()

[Thierry Reding]

From: Thierry Reding <treding at nvidia.com>

This is a simple wrapper that increments the reference count of the
backing DMA fence.

Signed-off-by: Thierry Reding <treding at nvidia.com>
---
 drivers/gpu/drm/nouveau/nouveau_fence.c | 9 +++++++++
 drivers/gpu/drm/nouveau/nouveau_fence.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c
index 8e7550553584..8530c2684832 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.c
@@ -363,6 +363,15 @@ nouveau_fence_sync(struct dma_fence *fence, struct nouveau_channel *chan,
 	return ret;
 }
 
+struct nouveau_fence *
+nouveau_fence_ref(struct nouveau_fence *fence)
+{
+	if (fence)
+		dma_fence_get(&fence->base);
+
+	return fence;
+}
+
 void
 nouveau_fence_unref(struct nouveau_fence **pfence)
 {
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.h b/drivers/gpu/drm/nouveau/nouveau_fence.h
index 76cbf0c27a30..b8afd4b06445 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.h
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.h
@@ -19,6 +19,7 @@ struct nouveau_fence {
 
 int  nouveau_fence_new(struct nouveau_channel *, bool sysmem,
 		       struct nouveau_fence **);
+struct nouveau_fence *nouveau_fence_ref(struct nouveau_fence *);
 void nouveau_fence_unref(struct nouveau_fence **);
 
 int  nouveau_fence_emit(struct nouveau_fence *, struct nouveau_channel *);
-- 
2.28.0