serial8250_request_rsa_resource 435 drivers/tty/serial/8250/8250_core.c if (serial8250_request_rsa_resource(up) == 0) serial8250_request_rsa_resource 442 drivers/tty/serial/8250/8250_core.c if (serial8250_request_rsa_resource(up) == 0) serial8250_request_rsa_resource 462 drivers/tty/serial/8250/8250_core.c ret = serial8250_request_rsa_resource(up);