drm/nouveau: Initialize GEM object before TTM object

TTM assumes that drivers initialize the embedded GEM object before
calling the ttm_bo_init() function. This is not currently the case
in the Nouveau driver. Fix this by splitting up nouveau_bo_new()
into nouveau_bo_alloc() and nouveau_bo_init() so that the GEM can
be initialized before TTM BO initialization when necessary.

Fixes: b96f3e7c8069 ("drm/ttm: use gem vma_node")
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190814093524.GA31345@ulmo

1 files changed, 11 insertions, 5 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c
index 7262ced9688a..0247903f0c5c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_prime.c
+++ b/drivers/gpu/drm/nouveau/nouveau_prime.c
@@ -63,28 +63,34 @@ struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_bo *nvbo;
 	struct dma_resv *robj = attach->dmabuf->resv;
+	size_t size = attach->dmabuf->size;
 	u32 flags = 0;
 	int ret;
 
 	flags = TTM_PL_FLAG_TT;
 
 	dma_resv_lock(robj, NULL);
-	ret = nouveau_bo_new(&drm->client, attach->dmabuf->size, 0, flags, 0, 0,
-			     sg, robj, &nvbo);
+	nvbo = nouveau_bo_alloc(&drm->client, size, flags, 0, 0);
 	dma_resv_unlock(robj);
-	if (ret)
-		return ERR_PTR(ret);
+	if (IS_ERR(nvbo))
+		return ERR_CAST(nvbo);
 
 	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
 
 	/* Initialize the embedded gem-object. We return a single gem-reference
 	 * to the caller, instead of a normal nouveau_bo ttm reference. */
-	ret = drm_gem_object_init(dev, &nvbo->bo.base, nvbo->bo.mem.size);
+	ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
 	if (ret) {
 		nouveau_bo_ref(NULL, &nvbo);
 		return ERR_PTR(-ENOMEM);
 	}
 
+	ret = nouveau_bo_init(nvbo, size, 0, flags, sg, robj);
+	if (ret) {
+		nouveau_bo_ref(NULL, &nvbo);
+		return ERR_PTR(ret);
+	}
+
 	return &nvbo->bo.base;
 }