From: Tangudu Tilak Tirumalesh <tilak.tirumalesh.tangudu@intel.com>
Date: Wed, 3 Jun 2026 06:52:16 +0000 (+0530)
Subject: drm/xe: Clear pending_disable before signaling suspend fence
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=54f2a0442a30fe7a0f6bc8345e81f8b2db8effbd;p=thirdparty%2Fkernel%2Flinux.git

drm/xe: Clear pending_disable before signaling suspend fence

In the schedule-disable done path for suspend, we
signal the suspend fence before clearing pending_disable.

That wakeup can let suspend_wait complete and resume be queued
immediately. The resume path may then reach enable_scheduling()
while pending_disable is still set and hit the
!exec_queue_pending_disable(q) assertion.

Fix this by clearing pending_disable before signaling
the suspend fence, so any resumed transition observes a
consistent state.

Fixes: 87651f31ae4e ("drm/xe/guc_submit: fix race around suspend_pending")
Cc: stable@vger.kernel.org # v7.0+
Signed-off-by: Tangudu Tilak Tirumalesh <tilak.tirumalesh.tangudu@intel.com>
Reviewed-by: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patch.msgid.link/20260603065217.3131066-3-tilak.tirumalesh.tangudu@intel.com
(cherry picked from commit 4b1ae138b0e103d753773956a84eebc2edbf62c4)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index 3db627b56e11..3493dd533d6c 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -2804,8 +2804,8 @@ static void handle_sched_done(struct xe_guc *guc, struct xe_exec_queue *q,
 		xe_gt_assert(guc_to_gt(guc), exec_queue_pending_disable(q));
 
 		if (q->guc->suspend_pending) {
-			suspend_fence_signal(q);
 			clear_exec_queue_pending_disable(q);
+			suspend_fence_signal(q);
 		} else {
 			if (exec_queue_banned(q)) {
 				smp_wmb();