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Subject: Re: [linux-usb-devel] [PATCH] Ohci-hcd: fix endless loop
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: David Brownell <david-b@pacbell.net>
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Date: Sat, 27 Nov 2004 09:07:49 +1100
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> If you got the "IRQ INTR_SF lossage" diagnostic, there's clearly
> some problem with IRQ handling after the resume ... is the iBook
> firmware (or hardware) doing wierd stuff so that the normal PCI
> IRQ calls stopped working?

The iBook hardware isn't doing anything special, the controller is just
coming back out of the blue. If it's the NEC one, it's just a normal NEC
EHCI+OHCI coming out of D3cold, if it's the KeyLargo Apple one, it comes
from some special state which  is similar to D2.

Ben.