Shouldn't happen, and we invert the struct_mutex with reservation here, potentially leading to deadlocks. Once reservations become lockdep annotated, lockdep will go splat on this.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@canonical.com --- drivers/gpu/drm/nouveau/nouveau_gem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index b4b4d0c..7054706 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -50,7 +50,8 @@ nouveau_gem_object_del(struct drm_gem_object *gem) return; nvbo->gem = NULL;
- if (unlikely(nvbo->pin_refcnt)) { + /* Lockdep hates you for doing reserve with gem object lock held */ + if (WARN_ON_ONCE(nvbo->pin_refcnt)) { nvbo->pin_refcnt = 1; nouveau_bo_unpin(nvbo); }