digi_write_room 228 drivers/usb/serial/digi_acceleport.c static int digi_write_room(struct tty_struct *tty); digi_write_room 278 drivers/usb/serial/digi_acceleport.c .write_room = digi_write_room, digi_write_room 308 drivers/usb/serial/digi_acceleport.c .write_room = digi_write_room,