Apparently, usb_bulk_msg() cannot be used with data on the stack: http://www.linuxtv.org/pipermail/linux-dvb/2008-August/028150.html http://www.mail-archive.com/linux-usb-devel@xxxxxxxxxxxxxxxxxxxxx/msg19158.html -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html