drm/xe: Add xe_sched_add_msg_locked helper

Will help by allowing callers to own message locking.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240809191929.3138956-4-matthew.brost@intel.com

drivers/gpu/drm/xe/xe_gpu_scheduler.c

@@ -94,8 +94,15 @@ void xe_sched_add_msg(struct xe_gpu_scheduler *sched,
 		      struct xe_sched_msg *msg)
 {
 	xe_sched_msg_lock(sched);
-	list_add_tail(&msg->link, &sched->msgs);
+	xe_sched_add_msg_locked(sched, msg);
 	xe_sched_msg_unlock(sched);
+}
 
+void xe_sched_add_msg_locked(struct xe_gpu_scheduler *sched,
+			     struct xe_sched_msg *msg)
+{
+	lockdep_assert_held(&sched->base.job_list_lock);
+
+	list_add_tail(&msg->link, &sched->msgs);
 	xe_sched_process_msg_queue(sched);
 }

drivers/gpu/drm/xe/xe_gpu_scheduler.h

@@ -24,6 +24,8 @@ void xe_sched_submission_stop(struct xe_gpu_scheduler *sched);
 
 void xe_sched_add_msg(struct xe_gpu_scheduler *sched,
 		      struct xe_sched_msg *msg);
+void xe_sched_add_msg_locked(struct xe_gpu_scheduler *sched,
+			     struct xe_sched_msg *msg);
 
 static inline void xe_sched_msg_lock(struct xe_gpu_scheduler *sched)
 {