Hi,
On Sat, 2025-12-13 at 04:38 -0500, Sasha Levin wrote:
This is a note to let you know that I've just added the patch titled
drm/xe: Enforce correct user fence signaling order using
to the 6.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: drm-xe-enforce-correct-user-fence-signaling-order-us.patch and it can be found in the queue-6.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
(Already replied to a similar email from GregKH) Please skip this patch. The patch looks already applied and appears to be the result of an incorrect merge resolution.
Thanks, Thomas
commit e0d6df858765e6228a87c8559ccbe6826a1a6fef Author: Matthew Brost matthew.brost@intel.com Date: Fri Oct 31 16:40:45 2025 -0700
drm/xe: Enforce correct user fence signaling order using [ Upstream commit adda4e855ab6409a3edaa585293f1f2069ab7299 ] Prevent application hangs caused by out-of-order fence signaling when user fences are attached. Use drm_syncobj (via dma-fence-chain) to guarantee that each user fence signals in order, regardless of the signaling order of the attached fences. Ensure user fence writebacks to user space occur in the correct sequence. v7: - Skip drm_syncbj create of error (CI) Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs") Signed-off-by: Matthew Brost matthew.brost@intel.com Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com Link: https://patch.msgid.link/20251031234050.3043507-2-matthew.brost@intel.com Signed-off-by: Sasha Levin sashal@kernel.org
diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c index cb5f204c08ed6..a6efe4e8ab556 100644 --- a/drivers/gpu/drm/xe/xe_exec_queue.c +++ b/drivers/gpu/drm/xe/xe_exec_queue.c @@ -344,6 +344,9 @@ void xe_exec_queue_destroy(struct kref *ref) struct xe_exec_queue *q = container_of(ref, struct xe_exec_queue, refcount); struct xe_exec_queue *eq, *next;
- if (q->ufence_syncobj)
drm_syncobj_put(q->ufence_syncobj);if (q->ufence_syncobj) drm_syncobj_put(q->ufence_syncobj);