From 1216f732379151cd581444e385a8266d0b54549d Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 15 Aug 2013 00:02:36 +0200
Subject: [PATCH] drm/gem: WARN about unbalanced handle refcounts
Trying to drop a reference we don't have is a pretty serious bug.
Trying to paper over it is an even worse offense.
So scream into dmesg with a big WARN in case that ever happens.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/drm_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 44978bcf81255..dcbd2f559e397 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -238,7 +238,7 @@ static void drm_gem_object_handle_free(struct drm_gem_object *obj)
void
drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
{
- if (atomic_read(&obj->handle_count) == 0)
+ if (WARN_ON(atomic_read(&obj->handle_count) == 0))
return;
/*
--
2.30.2