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| author | Matthew Auld <matthew.auld@intel.com> | 2024-02-19 12:18:53 +0000 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-26 18:17:55 -0400 |
| commit | 8d0eab76ae55ff4273695807be28f0bf829c401c (patch) | |
| tree | 5c20414b63b47c5c543d7527a34fb7567750decc /drivers/gpu | |
| parent | 40a56d26d5702bac309542e208c1a4e2f95b2c66 (diff) | |
| download | linux-stable-8d0eab76ae55ff4273695807be28f0bf829c401c.tar.gz linux-stable-8d0eab76ae55ff4273695807be28f0bf829c401c.tar.bz2 linux-stable-8d0eab76ae55ff4273695807be28f0bf829c401c.zip | |
drm/buddy: check range allocation matches alignment
[ 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@intel.com>
Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Reviewed-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240219121851.25774-5-matthew.auld@intel.com
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/drm_buddy.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c index f3a6ac908f81..5ebdd6f8f36e 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; |