From: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Date: Tue, 1 Apr 2014 13:15:47 +0000 (+0200)
Subject: drm/qxl: unset a pointer in sync_obj_unref
X-Git-Tag: v3.12.21~50
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=657ac32e6a1cf38f6f2380cb075ab6fd56498c0f;p=thirdparty%2Fkernel%2Fstable.git

drm/qxl: unset a pointer in sync_obj_unref

commit 41ccec352f3c823931a7d9d2a9c7880c14d7415a upstream.

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

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---

diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index 037786d7c1dc8..ed90fbe63686a 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)