timing out on a semaphore

Tim Waugh
2001-02-25T22:41:04Z

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I'm trying to chase down a semaphore time-out problem. I want to
sleep on a semaphore until either

(a) it's signalled, or
(b) some amount of time has elapsed.

What I'm doing is calling add_timer, and then down_interruptible, and
finally del_timer. The timer's function ups the semaphore.

The code is in parport_wait_event, in drivers/parport/ieee1284.c.

Can anyone see anything obviously wrong with it? It seems to
sometimes get stuck.

Tim.
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