Hi all,

this patch fixes bug in Digi epca.c driver. This driver calls 
tty_register_driver() 3 times and tty_unregister_driver() 2 times. 
This bug causes hang on module unload.

Also a question: somebody knows why this driver scans PCI devices before
registering tty drivers? It makes impossible to remove panic() calls easily.

Best regards.

-- 
Andrey Panin            | Embedded systems software engineer
pazke@orbita1.ru        | PGP key: http://www.orbita1.ru/~pazke/AndreyPanin.asc