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Re: mkinitrd, ehci-hcd, error -71 on boot



On 8/15/07, Pete Zaitcev <zaitcev redhat com> wrote:
> On Tue, 14 Aug 2007 19:52:39 -0600, Lamont Peterson <lamont gurulabs com> wrote:
>
> > I've wondered for a long time why the ehci driver wasn't first.  I've seen
> > many a system (especially notebooks) where the USB 2.0 ports were running as
> > USB 1.1.  I hope there's no good reasons to stop this change from going in.
>
> In theory there should be no issues with loading ehci_hcd after its
> companion (either uhci_hcd on Intel and VIA or ohci_hcd elsewhere).
> The problem I am trying to address is how the discovery and initialization
> continues on the companion bus when we start initializing EHCI in parallel,
> which happens because khubd continues to run when modprobe has exited.
> This effects a sudden disconnect as EHCI takes over the port; if the
> takeover fails (usually because the device does not support High-Speed)
> EHCI returns the port and the interrupted initialization repeats.
>
> If EHCI fails to take over a root hub port despite a device being High-Speed
> capable, it is a bug somewhere and initialization order is not likely
> to fix it (although it may, mostly due to interactions with firmware).
> File a bug or let me know directly.
>

This related to http://bugzilla.kernel.org/show_bug.cgi?id=8535 (USB
freeze/system death)?

tom
-- 
Tom London


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