diff options
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dmem.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c index d2abee3efb9a..ad4570c50be7 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -279,11 +279,25 @@ err: static void nouveau_dmem_folio_split(struct folio *head, struct folio *tail) { + struct nouveau_dmem_chunk *chunk; + struct nouveau_dmem *dmem; + if (tail == NULL) return; tail->pgmap = head->pgmap; tail->mapping = head->mapping; folio_set_zone_device_data(tail, folio_zone_device_data(head)); + + /* + * The split hands out a new independently-freeable folio that will + * later be released via nouveau_dmem_folio_free(); account for it so + * chunk->callocated stays balanced. + */ + chunk = nouveau_page_to_chunk(&head->page); + dmem = chunk->drm->dmem; + spin_lock(&dmem->lock); + chunk->callocated++; + spin_unlock(&dmem->lock); } static const struct dev_pagemap_ops nouveau_dmem_pagemap_ops = { |