RE: sharing interrupt between PCI device

[Altobelli, David]

>> On Mon, Nov 10, 2008 at 4:01 PM, Nobin Mathew <nobin.mathew@xxxxxxxxx> wrote:
>> > Yes USB Virtual Controller has input devices like keyboard and mouse
>> > (routed through hpilo card (remote console)), so those things stops
>> > working when we remove hpilo driver.
>> >

That is not quite correct.  Nothing is routed through hpilo.

The problem is that there is a shared hardware resource in iLO function 2 (hpilo),
and it is used by iLO function 4 (uhci_hcd kdb/mouse).  When hpilo is unloaded,
the pci_device_disable() call removes the ability for this function to act as a
busmaster, which stops the uhci_hcd from functioning correctly.

Reloading hpilo will enable the remote console again.

Removing the pci_disable_device() "fixes" the problem, but doing that worries me.
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