Am Donnerstag, 29. Juli 2004 19:54 schrieb Greg KH:
> On Thu, Jul 29, 2004 at 06:19:15PM +0200, Duncan Sands wrote:
> > Rather than taking the semaphore dev->serialize in the
> > top-level ioctl handler, usbdev_ioctl, push it down to the
> > individual ioctl routines. This is a Good Thing because
> > the ioctl routines do plenty of copy_to/from_user calls.
>
> So? It's safe to hold a semaphore while copying data from or to
> userspace. I don't really see that this will fix much, becides make it
True, but it may mean holding up khubd for seconds in the worst case.
So there's a latency issue. Whether it's worth it is another question.
Regards
Oliver
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