drm/i915/selftests: Finish pending mock requests on cancellation.

Flush all the pending requests from the mock engine when they are
cancelled.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200930163253.2789-2-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/gt/mock_engine.c

@@ -245,18 +245,39 @@ static void mock_reset_rewind(struct intel_engine_cs *engine, bool stalled)
 	GEM_BUG_ON(stalled);
 }
 
+static void mark_eio(struct i915_request *rq)
+{
+	if (i915_request_completed(rq))
+		return;
+
+	GEM_BUG_ON(i915_request_signaled(rq));
+
+	i915_request_set_error_once(rq, -EIO);
+	i915_request_mark_complete(rq);
+}
+
 static void mock_reset_cancel(struct intel_engine_cs *engine)
 {
-	struct i915_request *request;
+	struct mock_engine *mock =
+		container_of(engine, typeof(*mock), base);
+	struct i915_request *rq;
 	unsigned long flags;
 
+	del_timer_sync(&mock->hw_delay);
+
 	spin_lock_irqsave(&engine->active.lock, flags);
 
 	/* Mark all submitted requests as skipped. */
-	list_for_each_entry(request, &engine->active.requests, sched.link) {
-		i915_request_set_error_once(request, -EIO);
-		i915_request_mark_complete(request);
+	list_for_each_entry(rq, &engine->active.requests, sched.link)
+		mark_eio(rq);
+	intel_engine_signal_breadcrumbs(engine);
+
+	/* Cancel and submit all pending requests. */
+	list_for_each_entry(rq, &mock->hw_queue, mock.link) {
+		mark_eio(rq);
+		__i915_request_submit(rq);
 	}
+	INIT_LIST_HEAD(&mock->hw_queue);
 
 	spin_unlock_irqrestore(&engine->active.lock, flags);
 }