2006/6/27, Alan Stern <[EMAIL PROTECTED]>:
> On Tue, 27 Jun 2006, Franck Bui-Huu wrote:
>
> > Franck Bui-Huu wrote:
> > > +
> > > + if (wait_for_completion_interruptible_timeout(
> > > + &done, timeout ? : MAX_SCHEDULE_TIMEOUT) <= 0) {
> >
> > oops, timeout is in ms, and should be converted in jiffies...BTW why not
> > simply always using jiffies ? timeout value are usually > 1s so it's pretty
> > easy for device driver to write "2*HZ" for a 2 second timout.
>
> You're asking the wrong question. The real question is "Why ever use
> jiffies?"
>
> Jiffy values don't mean anything outside a running system. They aren't
> portable at all. But seconds, milliseconds, microseconds, and so on all
> have very well-defined meanings.
>
> It's only because of historical inertia that jiffies are still used
> anywhere.
>
well should take a look to this thread...
http://marc.theaimsgroup.com/?l=linux-kernel&m=112136226822727&w=2
That said, jiffies are usually used by the kernel services, so I guess
that all uses of sec, msec, usec in the usb device drivers will be
converted into jiffies eventually...
Thanks
--
Franck
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