serial: core: don't kfree device managed data

The put_device() function will call serial_base_ctrl_release() or
serial_base_port_release() so these kfrees() are a double free bug.

Fixes: 84a9582f ("serial: core: Start managing serial controllers to enable runtime PM")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Message-ID: <ZH7tsTmWY5b/4m+6@moroto>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/serial_base_bus.c

@@ -98,7 +98,7 @@ struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port,
 				      serial_base_ctrl_release,
 				      port->ctrl_id);
 	if (err)
-		goto err_free_ctrl_dev;
+		goto err_put_device;
 
 	err = device_add(&ctrl_dev->dev);
 	if (err)
@@ -108,8 +108,6 @@ struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port,
 
 err_put_device:
 	put_device(&ctrl_dev->dev);
-err_free_ctrl_dev:
-	kfree(ctrl_dev);
 
 	return ERR_PTR(err);
 }
@@ -140,7 +138,7 @@ struct serial_port_device *serial_base_port_add(struct uart_port *port,
 				      serial_base_port_release,
 				      port->line);
 	if (err)
-		goto err_free_port_dev;
+		goto err_put_device;
 
 	port_dev->port = port;
 
@@ -152,8 +150,6 @@ struct serial_port_device *serial_base_port_add(struct uart_port *port,
 
 err_put_device:
 	put_device(&port_dev->dev);
-err_free_port_dev:
-	kfree(port_dev);
 
 	return ERR_PTR(err);
 }