drm/nouveau: unpin various bo's before destroying

These objects leak VRAM - but only on module unload.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv10_fence.c b/drivers/gpu/drm/nouveau/nv10_fence.c
index ce752bf..7ae7f97 100644
--- a/drivers/gpu/drm/nouveau/nv10_fence.c
+++ b/drivers/gpu/drm/nouveau/nv10_fence.c
@@ -155,6 +155,8 @@
 {
 	struct nv10_fence_priv *priv = drm->fence;
 	nouveau_bo_unmap(priv->bo);
+	if (priv->bo)
+		nouveau_bo_unpin(priv->bo);
 	nouveau_bo_ref(NULL, &priv->bo);
 	drm->fence = NULL;
 	kfree(priv);
@@ -183,8 +185,11 @@
 				     0, 0x0000, NULL, &priv->bo);
 		if (!ret) {
 			ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
-			if (!ret)
+			if (!ret) {
 				ret = nouveau_bo_map(priv->bo);
+				if (ret)
+					nouveau_bo_unpin(priv->bo);
+			}
 			if (ret)
 				nouveau_bo_ref(NULL, &priv->bo);
 		}