Ensure we check that the size is compatible with the requested
page_size. For tiny objects that are automatically annotated with
TTM_PL_FLAG_CONTIGUOUS(since they fit within a single page), we
currently end up silently overriding the min_page_size, which ends up
hiding bugs elsewhere.
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Cc: Nirmoy Das <nirmoy.das@xxxxxxxxxxxxxxx>
Reviewed-by: Nirmoy Das <nirmoy.das@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c
index 8e4e3f72c1ef..a5109548abc0 100644
--- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c
+++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c
@@ -70,6 +70,7 @@ static int i915_ttm_buddy_man_alloc(struct ttm_resource_manager *man,
min_page_size = bo->page_alignment << PAGE_SHIFT;
GEM_BUG_ON(min_page_size < mm->chunk_size);
+ GEM_BUG_ON(!IS_ALIGNED(size, min_page_size));
if (place->fpfn + bman_res->base.num_pages != place->lpfn &&
place->flags & TTM_PL_FLAG_CONTIGUOUS) {
--
2.34.1
