From: Matthew Auld <matthew.auld@xxxxxxxxx> [ Upstream commit 2986314aa811c8a23aeb292edd30315495d54966 ] 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: Matthew Auld <matthew.auld@xxxxxxxxx> Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx> Cc: Christian König <christian.koenig@xxxxxxx> Reviewed-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20240219121851.25774-5-matthew.auld@xxxxxxxxx Signed-off-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/drm_buddy.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c index f3a6ac908f815..5ebdd6f8f36e6 100644 --- a/drivers/gpu/drm/drm_buddy.c +++ b/drivers/gpu/drm/drm_buddy.c @@ -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; -- 2.43.0
