[AMD Official Use Only]
looks good to me. But maybe build_bug_on works too and more reasonable to detect such wrong usage. ________________________________ From: Chen, Guchun Guchun.Chen@amd.com Sent: Friday, September 10, 2021 12:30:14 PM To: amd-gfx@lists.freedesktop.org amd-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org dri-devel@lists.freedesktop.org; Koenig, Christian Christian.Koenig@amd.com; Pan, Xinhui Xinhui.Pan@amd.com; Deucher, Alexander Alexander.Deucher@amd.com Cc: Chen, Guchun Guchun.Chen@amd.com; Shi, Leslie Yuliang.Shi@amd.com Subject: [PATCH] drm/ttm: add a BUG_ON in ttm_set_driver_manager when array bounds
Vendor will define their own memory types on top of TTM_PL_PRIV, but call ttm_set_driver_manager directly without checking mem_type value when setting up memory manager. So add such check to aware the case when array bounds.
Signed-off-by: Leslie Shi Yuliang.Shi@amd.com Signed-off-by: Guchun Chen guchun.chen@amd.com --- include/drm/ttm/ttm_device.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h index 7a0f561c57ee..24ad76ca8022 100644 --- a/include/drm/ttm/ttm_device.h +++ b/include/drm/ttm/ttm_device.h @@ -308,6 +308,7 @@ ttm_manager_type(struct ttm_device *bdev, int mem_type) static inline void ttm_set_driver_manager(struct ttm_device *bdev, int type, struct ttm_resource_manager *manager) { + BUG_ON(type >= TTM_NUM_MEM_TYPES); bdev->man_drv[type] = manager; }
-- 2.17.1