Run strace to cat. You will know what is causing the error. Can you post the code?
Regards Durga ________________________________ From: Sam Carter <[email protected]> To: kernelnewbies <[email protected]> Sent: Thu, January 7, 2010 7:01:20 AM Subject: 'No such device or address' when writing to device driver Hi all, I'm trying to write a simple char driver following the 'Linux Device Drivers' book from O' Reilly. My driver appears in /proc/devices and under lsmod. I've been trying to register the device fops table so I can read/write to it, however when I try to cat some data to it in /dev/myDevice I get the error 'No such device or address'. The device does appear on the list with ls /dev/. Can anyone help me find the source of this problem? Thanks in advance. Sam
