Commit 2986314a authored by Matthew Auld's avatar Matthew Auld Committed by Christian König
Browse files

drm/buddy: check range allocation matches alignment 



Likely not a big deal for real users, but for consistency we should
respect the min_page_size here. Main issue is that bias allocations
turns into normal range allocation if the range and size matches
exactly, and in the next patch we want to add some unit tests for this
part of the api.

Signed-off-by: default avatarMatthew Auld <matthew.auld@intel.com>
Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Reviewed-by: default avatarArunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240219121851.25774-5-matthew.auld@intel.com


Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
parent f41900e4

drivers/gpu/drm/drm_buddy.c

+5 −1
Original line number Diff line number Diff line
@@ -771,8 +771,12 @@ int drm_buddy_alloc_blocks(struct drm_buddy *mm, 
		return -EINVAL;



	/* Actual range allocation */

	if (start + size == end)

	if (start + size == end) {

		if (!IS_ALIGNED(start | end, min_block_size))

			return -EINVAL;



		return __drm_buddy_alloc_range(mm, start, size, NULL, blocks);

	}



	original_size = size;

	original_min_size = min_block_size;