UNKNOWN_DEV       364 drivers/tty/serial/8250/8250_pnp.c 	{	"PNPCXXX",		UNKNOWN_DEV	},
UNKNOWN_DEV       366 drivers/tty/serial/8250/8250_pnp.c 	{	"PNPDXXX",		UNKNOWN_DEV	},
UNKNOWN_DEV       442 drivers/tty/serial/8250/8250_pnp.c 	if (flags & UNKNOWN_DEV) {