Re: Missing USB devices.

[Aleš Nesrsta]

28.8.2013 08:59, Melki Christian (consultant) wrote:
> I'm thinking of the EHCI hand-over. In the case of EHCI handover beeing 
> successful within the timeout, you never clear the USBLEGCTLSTS register 
> (SMI's). You do that in the other cases however. Why? I can not think of any 
> case of a successful handover with SMI's still enabled. To what purpose? A 
> buggy BIOS would maybe act upon such stuff? Maybe thats a case for lost devices 
> etc?
Ok, I made a short look into Linux USB source code and I saw there is 
USBLEGCTLSTS register reset in any case.
(What is maybe more interesting, Linux driver DOES NOT handover on some 
(broken) devices, only reset SMI...)

So I prepared simple "SMI" patch (attached).

BR,
Ales