serial driver fails to delete proc entry on module unload

Here's what happens when you load and unload the
2.4.7-ac3 serial driver five times: // Thomas Hood

root@thanatos:/proc/tty/driver# ll
total 0
dr-xr-xr-x    2 root     root            0 Jul 31 01:22 ./
dr-xr-xr-x    4 root     root            0 Jul 31 01:22 ../
-r--r--r--    1 root     root            0 Jul 31 01:27 serial
-r--r--r--    1 root     root            0 Jul 31 01:27 serial
-r--r--r--    1 root     root            0 Jul 31 01:27 serial
-r--r--r--    1 root     root            0 Jul 31 01:27 serial
-r--r--r--    1 root     root            0 Jul 31 01:27 serial