6851840 usbftdi/tcdrain(3c) sleeps for 500ms and doesn't check for tx complete 6850067 SUNWuftdi has a duplicate copy of i.preserve
6763764 Support for FTDI USB Serial adapters 6798921 usbser mishandles some ioctls 4696628 USB serial needs properties to ignore CD 6821751 Add support for 921600 baud