This imbalance may cause hangs when TTM is trying to swap out a buffer that is already on the delayed delete list.
Signed-off-by: Thomas Hellstrom thellstrom@vmware.com Reviewed-by: Jakob Bornecrantz jakob@vmware.com Cc: stable@vger.kernel.org --- drivers/gpu/drm/ttm/ttm_bo.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 36792bd..b67cfca 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1834,6 +1834,7 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) spin_unlock(&glob->lru_lock); (void) ttm_bo_cleanup_refs(bo, false, false, false); kref_put(&bo->list_kref, ttm_bo_release_list); + spin_lock(&glob->lru_lock); continue; }