On Sun, 27 Nov 2005, Alan Stern wrote:
>On Sun, 27 Nov 2005, Adam J. Richter wrote:
[...]
>> 2.6.15-rc2-git6, during "modprobe ehci-hcd" blocks forever.
>>
>> I can still type and have my text echoed back to me, and I
>> can use the console keys to dump process information.
[...]
>> One thing that makes my configuration a little unusual is that
>> I am booting from a USB 2.0 flash disk, and previous versions of the kernel
>> only see the flash disk after boot if I remove the ehci module (causing
>> the port to fall back to uhci control), or physical remove and reinsert
>> the flash disk. I suspect that this is some kind of BIOS interaction
>> problem, but I'm just guessing.
>This is a known issue. You can work around it by adding a call to
> spin_lock_init(&ehci->lock);
>as the first line of drivers/usb/host/ehci-pci.c:ehci_pci_reset().
Thank you, Alan! I made that change to my 2.6.15-rc3 tree,
and do not have the problem anymore. (drivers/usb/host is unchanged
between 2.6.15-rc2-git6 and 2.6.15-rc3.)
Also, by the way, in 2.6.15-rc3, the USB 2.0 flash disk
that I use for booting is seen by ehci without my having to
remove it and plug it back in or unload ehci-hcd.
Adam Richter
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