I have a brand new Avalon Nano 3 usb mining stick.
I've ser up p2pool (I don't think there's a problem with that)
I'm trying to start bfgminer with

bfgminer  -S ICA:/dev/bus/usb/005/012 -o stratum+tcp://127.0.0.1:9332 -O userxxx:passxxx --set-device ICA:baud=115200 --set-device ICA:reopen=timeout --set-device ICA:work_division=1 --set-device ICA:fpga_count=1 --set-device ICA:probe_timeout=100 --set-device ICA:timing=0.22 --api-listen

Obviously bfminer finds /dev/bus/usb/005/012 (iv'e set group to lp, same result anyhow if i run bfgminer as root)
bfminer somehow does not connect properly to the miner and reports:

[2015-11-21 15:29:26] /dev/bus/usb/005/012: tcflush failed: Inappropriate ioctl for device