Subject: Re: uhci & ugen & isochronous transfer
To: YAMAMOTO Takashi <yamt@netbsd.org>
From: Lennart Augustsson <lennart@augustsson.net>
List: tech-kern
Date: 09/16/2001 18:33:36
YAMAMOTO Takashi wrote:

> hi.
>
> uhci.c change from rev.1.125 to rev.1.126(Update frlengths)
> seems to break ugen isoc transfer.
> since frlengths may be reused(at least in case of ugen),
> updating them causes future transfer failures.
>
> what's intended with this change?
> (who uses updated frlengths?)

I think the idea was that without this change a user of, e.g., ugen
cannot now how much has been transferred in each frame.

But it was certainly not a well tested change.

    -- Lennart