Merge branch 'clk-helpers' (early part) into clk-fixes

* 'clk-helpers' (early part):
  clk: fix determine rate error with pass-through clock

drivers/clk/clk.c

@@ -1125,8 +1125,10 @@ static int clk_core_round_rate_nolock(struct clk_core *core,
 {
 	lockdep_assert_held(&prepare_lock);
 
-	if (!core)
+	if (!core) {
+		req->rate = 0;
 		return 0;
+	}
 
 	clk_core_init_rate_req(core, req);