1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index a37a94872a14..13012a1f1486 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -113,7 +113,7 @@ int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
 
         *virtual = NULL;
         ret = ttm_mem_io_reserve(bdev, mem);
-        if (ret)
+        if (ret || !mem->bus.is_iomem)
                 return ret;
 
         if (mem->bus.addr) {