Hi Just a basic question. I am writing a driver "A". From "A" I want to write into a device using driver "B" {B is already written by some one else}. I want to know how to call the functions of driver "B". Say I want to call ioctl function "B_ioctl" of "B", so just calling "B_ioctl" is enough or any other procedure is required. Kindly reply to venkatraghu2002@yahoo.com. Thank You. Venkat. __________________________________________________ Terrorist Attacks on U.S. - How can you help? Donate cash, emergency relief information http://dailynews.yahoo.com/fc/US/Emergency_Information/ - Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/