From: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Date: Mon, 3 Nov 2025 12:31:47 +0000 (+0530)
Subject: drm/xe/guc: Synchronize Dead CT worker with unbind
X-Git-Tag: v6.17.9~234
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce6ccf8e881a919bf902174ac879f80c97669498;p=thirdparty%2Fkernel%2Fstable.git

drm/xe/guc: Synchronize Dead CT worker with unbind

[ Upstream commit 95af8f4fdce8349a5fe75264007f1af2aa1082ea ]

Cancel and wait for any Dead CT worker to complete before continuing
with device unbinding. Else the worker will end up using resources freed
by the undind operation.

Cc: Zhanjun Dong <zhanjun.dong@intel.com>
Fixes: d2c5a5a926f4 ("drm/xe/guc: Dead CT helper")
Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Link: https://patch.msgid.link/20251103123144.3231829-6-balasubramani.vivekanandan@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 492671339114e376aaa38626d637a2751cdef263)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index 22eff8476ad48..75ac0c424476e 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -200,6 +200,9 @@ static void guc_ct_fini(struct drm_device *drm, void *arg)
 {
 	struct xe_guc_ct *ct = arg;
 
+#if IS_ENABLED(CONFIG_DRM_XE_DEBUG)
+	cancel_work_sync(&ct->dead.worker);
+#endif
 	ct_exit_safe_mode(ct);
 	destroy_workqueue(ct->g2h_wq);
 	xa_destroy(&ct->fence_lookup);