[Intel-xe] [PATCH v2 2/2] drm/xe/guc_submit: fixup deregister in job timeout

[Matthew Auld <matthew.auld@intel.com>]

Rather check if the engine is still registered before proceeding with
deregister steps. Also the engine being marked as disabled doesn't mean
the engine has been disabled or deregistered from GuC pov, and here we
are signalling fences so we need to be sure GuC is not still using this
context.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_guc_submit.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index b88bfe7d8470..e499e6540ca5 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -881,15 +881,17 @@ guc_exec_queue_timedout_job(struct drm_sched_job *drm_job)
 	}
 
 	/* Engine state now stable, disable scheduling if needed */
-	if (exec_queue_enabled(q)) {
+	if (exec_queue_registered(q)) {
 		struct xe_guc *guc = exec_queue_to_guc(q);
 		int ret;
 
 		if (exec_queue_reset(q))
 			err = -EIO;
 		set_exec_queue_banned(q);
-		xe_exec_queue_get(q);
-		disable_scheduling_deregister(guc, q);
+		if (!exec_queue_destroyed(q)) {
+			xe_exec_queue_get(q);
+			disable_scheduling_deregister(guc, q);
+		}
 
 		/*
 		 * Must wait for scheduling to be disabled before signalling
-- 
2.41.0