[PATCH 1/2] drm/ttm: set ttm_buffer_object pointer as null after it's freed

[Huang Rui]

It avoids to be refered again after freed.

Signed-off-by: Huang Rui <ray.huang at amd.com>
Cc: Christian König <christian.koenig at amd.com>
Cc: Tom StDenis <Tom.StDenis at amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 138c989..d3ef5f8 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -54,6 +54,7 @@ static struct attribute ttm_bo_count = {
 static void ttm_bo_default_destroy(struct ttm_buffer_object *bo)
 {
 	kfree(bo);
+	bo = NULL;
 }
 
 static inline int ttm_mem_type_from_place(const struct ttm_place *place,
-- 
2.7.4