Messages in this thread | | | Date | Tue, 6 Oct 1998 23:58:54 -0400 | From | "Theodore Y. Ts'o" <> | Subject | Re: /proc/interrupts and serial |
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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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