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SubjectRe: /proc/interrupts and serial
   Date: 	Tue, 06 Oct 1998 13:06:35 -0700
From: Thomas Davis <tadavis@lbl.gov>

Etienne Lorrain wrote:
> /dev/ttyS* is open - ioports are permanently reserved.

and permanently is wrong.

if pcmcia calls the serial_register, and then the serial_deregister
function, the ioports are still reserved, even though the hardware
may be _gone_.

Permanently wasn't the best term to use. What Etienne meant to say is
that IO ports are reserved even when the serial port is closed. Of
course, if a PCMCIA serial port is deregstered, the IOport reservation
goes away. And if you unload the serial driver (assuming it is a
compiled as a module), it will automatically release the ioports as
well.

- Ted

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