Hi, I was looking at the initialization code for TUN/TAP and mwave devices, both those places they return a -EIO error code when they fail to initialize a device. the misc_register which they call the initialize the device return a EBUSY. Should'nt the device driver also return EBUSY as an error during registering a device is EBUSY not EIO!!!!! Or is it the case that the misc_register should check if it was an EIO and not EBUSY>???????? thanks gaurav _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/