diff options
| -rw-r--r-- | drivers/gpu/drm/drm_mm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index e0419cf09bbb..b80305484124 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -729,6 +729,8 @@ void drm_mm_init_scan(struct drm_mm *mm, u64 alignment, unsigned long color) { + DRM_MM_BUG_ON(!size); + mm->scan_color = color; mm->scan_alignment = alignment; mm->scan_size = size; @@ -764,6 +766,9 @@ void drm_mm_init_scan_with_range(struct drm_mm *mm, u64 start, u64 end) { + DRM_MM_BUG_ON(start >= end); + DRM_MM_BUG_ON(!size || size > end - start); + mm->scan_color = color; mm->scan_alignment = alignment; mm->scan_size = size; @@ -882,6 +887,8 @@ EXPORT_SYMBOL(drm_mm_scan_remove_block); */ void drm_mm_init(struct drm_mm *mm, u64 start, u64 size) { + DRM_MM_BUG_ON(start + size <= start); + INIT_LIST_HEAD(&mm->hole_stack); mm->scanned_blocks = 0; |