On Monday 24 June 2013 17:42:04 Ming Lei wrote:

This patch improves this above situation, and the qh will wait for 5
milliseconds before being unlinked from hardware, if one URB is submitted
during the period, the qh is move out of unlink wait list and the
interrupt transfer can be scheduled immediately, not like before: the
transfer is only linked to hardware until previous unlink is completed.

It seems to me that this logic should be used only if the URB completed
without error.
	
	Regards
		Oliver