Re: Large USB HID transfers

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On Tue, 5 Nov 2013, Cliff Brake wrote:

> On Tue, Nov 5, 2013 at 9:57 AM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> > On Mon, 4 Nov 2013, Cliff Brake wrote:
> >
> 
> >>
> >> I assume interrupts are disabled during both ohci_irq() and ehci_irq().
> >
> > Currently they are.  This will change somewhat in the not-too-distant
> > future.
> 
> Are there any patches available yet for this work?

There is commit c04ee4b1136e (Revert "Revert "USB: EHCI: support 
running URB giveback in tasklet context"") in Greg KH's usb-next tree.

Even with that commit, however, interrupts will remain disabled while 
the completion handler is called.  Changing that behavior is not so 
easy, as quite a few drivers depend on it.  There has been some work 
done to change this, too.  See the series of patches beginning here:

	http://marc.info/?l=linux-usb&m=137675675628650&w=2

Alan Stern

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