@@ -1524,7 +1524,18 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
dev_set_name(&adap->dev, "i2c-%d", adap->nr);
adap->dev.bus = &i2c_bus_type;
adap->dev.type = &i2c_adapter_type;
- res = device_register(&adap->dev);
+ device_initialize(&adap->dev);
+
+ /*
+ * This adapter can be used as a parent immediately after device_add(),
+ * setup runtime-pm (especially ignore-children) before hand.
+ */
+ device_enable_async_suspend(&adap->dev);
+ pm_runtime_no_callbacks(&adap->dev);
+ pm_suspend_ignore_children(&adap->dev, true);
+ pm_runtime_enable(&adap->dev);
+
+ res = device_add(&adap->dev);
if (res) {
pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);
goto out_list;
@@ -1536,11 +1547,6 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
if (res)
goto out_reg;
- device_enable_async_suspend(&adap->dev);
- pm_runtime_no_callbacks(&adap->dev);
- pm_suspend_ignore_children(&adap->dev, true);
- pm_runtime_enable(&adap->dev);
-
res = i2c_init_recovery(adap);
if (res == -EPROBE_DEFER)
goto out_reg;