RE: timing out on a semaphore

From: Davide Libenzi (
Date: Sun Feb 25 2001 - 17:53:15 EST

On 25-Feb-2001 Tim Waugh wrote:
> 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.

If it's SMP, have You tried to call del_timer_sync() ?

- Davide

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