Re: some question about ehci-sched.c

[yoma sophian]

hi Alan:
> We don't _have_ to do it.  It is a small optimization; an attempt to
> avoid schedule collisions between interrupt transactions and
> isochronous transactions.  The effect of the "-" is that the code tries
> frames in backward order when it is scheduling isochronous URBs -- as
> opposed to trying frames in forward order when scheduling periodic
> URBs.
appreciate ur kind explanation.