On Wed, 26 Apr 2000, Johannes Erdfelt wrote:
> On Wed, Apr 26, 2000, Chao Tan <[EMAIL PROTECTED]> wrote:
> >
> > I am looking at hub.c and feel confused about ont spot.
> >
> > In function hub_irq there is a line
> >
> > if (waitqueue_active(&khubd_wait)) { ...}
> >
> > But I can not see where the queue is operated anywhere.
> >
> > Can anyone give me some hint about it?
>
> In usb_hub_thread:
>
> do {
> usb_hub_events();
> interruptible_sleep_on(&khubd_wait);
> } while (!signal_pending(current));
>
> JE
>
I still does not get it totally. Can it make sure the same event can not
be processed more than once in this way?
--chao.
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