drm/msm: no mmu is only error if not using vram carveout

		uint32_t *iova)

{

	struct msm_gem_object *msm_obj = to_msm_bo(obj);

	struct drm_device *dev = obj->dev;

	int ret = 0;

	if (!msm_obj->domain[id].iova) {

		struct msm_drm_private *priv = obj->dev->dev_private;

		struct msm_mmu *mmu = priv->mmus[id];

		struct page **pages = get_pages(obj);

		if (!mmu) {

			dev_err(dev->dev, "null MMU pointer\n");

			return -EINVAL;

		}

		if (IS_ERR(pages))

			return PTR_ERR(pages);

		if (iommu_present(&platform_bus_type)) {

			uint32_t offset = (uint32_t)mmap_offset(obj);

			struct msm_mmu *mmu = priv->mmus[id];

			uint32_t offset;

			if (WARN_ON(!mmu))

				return -EINVAL;

			offset = (uint32_t)mmap_offset(obj);

			ret = mmu->funcs->map(mmu, offset, msm_obj->sgt,

					obj->size, IOMMU_READ | IOMMU_WRITE);

			msm_obj->domain[id].iova = offset;