Hey all,

I'm working on a driver right now that makes use of sequence files. I seem to have all the functions I need to implement for the fops working correctly. So I loaded the driver and fooled around with it and it looked okay.

The only problem is that after I removed the driver the seq_release didn't work the way I expected. After removal the file remained in /proc and I would like it to be removed. Further, when I ran cat on the file it caused a seg fault.

What does seq_release do and why is it causing this seg fault? Any fixes?

Thx

Alright, I figured it out. The source for seq_file was incomplete, since it was a very commonly used reference for drivers here's the full story...

The source mentioned that putting a call to create_proc_entry in the init function of the driver was the only necessary step to use it as a proc file. This is however incorrect in that this is insufficient. In the exit function there should be a call to remove_proc_entry as well.

Pretty simple solution as long as you know how to navigate the kernel source