updated patch with throttling

[Roman Kagan]

On Fri, Mar 25, 2005 at 01:51:28PM +0100, Duncan Sands wrote:
> mightn't you need to call usb_clear_halt somewhere?

Hmm, maybe...  On urb->status == -EPIPE.  BTW in the proposed change the
urb status is propagated to the tasklet, so it can do better handling of
completion errors too.  Most natural seems to be to update atm stats
(now we only update it on decoding errors), and probably do some
throttling too.

Roman.