[3.13.y.z extended stable] Patch "drm/qxl: unset a pointer in sync_obj_unref" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Thu May 1 19:17:33 UTC 2014

This is a note to let you know that I have just added a patch titled

    drm/qxl: unset a pointer in sync_obj_unref

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:


This patch is scheduled to be released in version

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see



>From 12e7a40198d6e50c66bcb2cd58ead1c559d5bfc1 Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst at canonical.com>
Date: Tue, 1 Apr 2014 15:15:47 +0200
Subject: 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 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)

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