Am Dienstag 23 Oktober 2007 schrieb Pete Zaitcev:
> On Tue, 23 Oct 2007 11:38:37 +0200, Oliver Neukum <[email protected]> wrote:
>
> > > + /* XXX Anchor these instead */
> > > + spin_lock_irqsave(&dev->buflock, flags);
> > > + if (!dev->read_urb_finished) {
> > > + spin_unlock_irqrestore(&dev->buflock, flags);
> > > + usb_kill_urb(dev->interrupt_in_urb);
> > > + } else
> > > + spin_unlock_irqrestore(&dev->buflock, flags);
>
> > Why bother? Simply call usb_kill_urb() unconditionally.
>
> Is it always safe to kill unfilled URBs? The filled but unsubmitted ones
> are ok, but in this case it's possible that we only allocated something
> but never submitted. Our current implementation happens to be safe by
> virtue of ->dev being NULL in such case. I do not remember if we always
> guaranteed that and since Vitaly is going to take this code for a
> backport, I decided to play it safe.
I am not sure as far as 2.4 is concerned. In fact I am not sure 2.4 has
usb_kill_urb() at all.
Regards
Oliver
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