2005/12/19, Alan Stern <[EMAIL PROTECTED]>:
> On Mon, 19 Dec 2005, Franck wrote:
>
> > > The new code is supposed to work okay, even with values between 0 and 500.
> > > If it doesn't, maybe Franck has found a real problem with it.
> > >
> >
> > setting hcd->power_budget to 0 (meaning power budget illimeted) fixes
> > the problem.
> >
> > I actually do not understand that comment that can be found in hub.c:
> >
> > /* consecutive bus-powered hubs aren't reliable; they can
> > * violate the voltage drop budget. [...]
> > */
> > if (udev->descriptor.bDeviceClass == USB_CLASS_HUB
> > && hub->power_budget
> > && (devstat & (1 << USB_DEVICE_SELF_POWERED)) == 0) {
> > /* FAIL */
> > }
> >
> > In my case, hub is the root hub and hub->power_budget is set to 250.
> > the connected device is an embedded hub which is bus powered. So it
> > fails. Could you put some ligth on that point ?
>
> You should be using the current development kernel, which means using Greg
> KH's USB patches. You can find them at
>
> http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/
>
> I always work with the gregkh-all-... patch set. You'll find this section
> of code is now completely different.
>
Indeed, there are a lot of changes on that part. I'll do that...
Thanks
--
Franck
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