drm/amdgpu: stop trying to schedule() with a spin held

Drop the lock before calling cancel_delayed_work_sync().

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96445

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Tested-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/scheduler/gpu_scheduler.c

@@ -339,7 +339,9 @@ static void amd_sched_job_finish(struct work_struct *work)
 	if (sched->timeout != MAX_SCHEDULE_TIMEOUT) {
 		struct amd_sched_job *next;
 
+		spin_unlock_irqrestore(&sched->job_list_lock, flags);
 		cancel_delayed_work_sync(&s_job->work_tdr);
+		spin_lock_irqsave(&sched->job_list_lock, flags);
 
 		/* queue TDR for next job */
 		next = list_first_entry_or_null(&sched->ring_mirror_list,