Re: [linux-usb] URB-ifying usb
Johannes Erdfelt (jerdfelt@sventech.com)
Tue, 30 Nov 1999 17:12:36 -0500
On Tue, Nov 30, 1999, Johannes Erdfelt <jerdfelt@sventech.com> wrote:
> On Tue, Nov 30, 1999, Pavel Machek <pavel@suse.cz> wrote:
> >
> > This patch fixes interface to between usb/uhci, makes audio actually
> > work, and makes usb much nicer (possibility of asynchronous
> > messages). Downside is that it will break ohci*, but fix for ohci-hcd
> > is already available. It is pretty big change so expect minor
> > problems; however as interface is much better I think it is
> > neccessary.
>
> Please don't apply this yet. There are still some places where the API
> is ill defined and even more important, the UHCI driver included here is
> not safe. There are many places where it doesn't adhere to API as well
> as race conditions in the removal of TD's.
Hmm, that came out wrong. What I meant to say was that I've been seeing
some unstableness with the UHCI URB driver (19991127) and that I think
it's a race condition in the removal of TD's.
Regardless, the code still needs some work.
JE
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