drm/ttm: change fence_lock to inner lock
This requires changing the order in ttm_bo_cleanup_refs_or_queue to
take the reservation first, as there is otherwise no race free way to
take lru lock before fence_lock.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/ttm/ttm_execbuf_util.c b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
index 1986d00..cd9e452 100644
--- a/drivers/gpu/drm/ttm/ttm_execbuf_util.c
+++ b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
@@ -213,8 +213,8 @@
driver = bdev->driver;
glob = bo->glob;
- spin_lock(&bdev->fence_lock);
spin_lock(&glob->lru_lock);
+ spin_lock(&bdev->fence_lock);
list_for_each_entry(entry, list, head) {
bo = entry->bo;
@@ -223,8 +223,8 @@
ttm_bo_unreserve_locked(bo);
entry->reserved = false;
}
- spin_unlock(&glob->lru_lock);
spin_unlock(&bdev->fence_lock);
+ spin_unlock(&glob->lru_lock);
list_for_each_entry(entry, list, head) {
if (entry->old_sync_obj)