Can I call icotl function which I have in my driver, from within the driver (beside from application) ? Does it have any side effects ? (there is no copy to/from user in this particular cmd) Usman http://www.beconvinced.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/