[PATCH 3.13 115/151] drm/qxl: unset a pointer in sync_obj_unref

[Kamal Mostafa]

3.13.11.1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Maarten Lankhorst <maarten.lankhorst at canonical.com>

commit 41ccec352f3c823931a7d9d2a9c7880c14d7415a upstream.

This fixes a BUG_ON(bo->sync_obj != NULL); in ttm_bo_release_list.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at canonical.com>
Signed-off-by: Dave Airlie <airlied at redhat.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/gpu/drm/qxl/qxl_ttm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index c7e7e65..c82c1d6a9 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -433,6 +433,7 @@ static int qxl_sync_obj_flush(void *sync_obj)
 
 static void qxl_sync_obj_unref(void **sync_obj)
 {
+	*sync_obj = NULL;
 }
 
 static void *qxl_sync_obj_ref(void *sync_obj)
-- 
1.9.1