[PATCH] drm/ttm: Fix TTM object open regression

[Thomas Hellstrom]

Commit drm/ttm: ttm object security fixes for render nodes introduced a
regression where, if a TTM object was opened multiple times from the same
open file, the caller would spin uninterruptibly in the kernel.

Fix this.

Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob at vmware.com>
---
 drivers/gpu/drm/ttm/ttm_object.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_object.c b/drivers/gpu/drm/ttm/ttm_object.c
index 3707985..53b51c4 100644
--- a/drivers/gpu/drm/ttm/ttm_object.c
+++ b/drivers/gpu/drm/ttm/ttm_object.c
@@ -292,7 +292,7 @@ int ttm_ref_object_add(struct ttm_object_file *tfile,

                if (ret == 0) {
                        ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
-                       if (!kref_get_unless_zero(&ref->kref)) {
+                       if (kref_get_unless_zero(&ref->kref)) {
                                rcu_read_unlock();
                                break;
                        }
-- 
1.7.10.4