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drm/nouveau: complain loudly if buffer is pinned during destruction 

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>
Acked-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Maarten Lankhorst 2013-06-27 13:38:22 +02:00 committed by Dave Airlie
parent 1e2bd5f53b
commit 27f06b2dbb
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/nouveau/nouveau_gem.c
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@ -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);
}