From mboxrd@z Thu Jan  1 00:00:00 1970
From: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Subject: [PATCH] drm/qxl: unset a pointer in sync_obj_unref
Date: Tue, 01 Apr 2014 15:15:47 +0200
Message-ID: <533ABC03.9070603@canonical.com>
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This fixes a BUG_ON(bo->sync_obj != NULL); in ttm_bo_release_list.

Cc: stable@vger.kernel.org #v3.10+
     
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
---
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index c7e7e6590c2b..c82c1d6a965a 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)