6851840 usbftdi/tcdrain(3c) sleeps for 500ms and doesn't check for tx complete6850067 SUNWuftdi has a duplicate copy of i.preserve
6763764 Support for FTDI USB Serial adapters6798921 usbser mishandles some ioctls4696628 USB serial needs properties to ignore CD6821751 Add support for 921600 baud