RE: [Xen-devel] [PATCH]xend: fix hotplug for integrated devices

["Cui, Dexuan" <dexuan.cui@xxxxxxxxx>]

Hi Simon,
One possible reason you don't meet with the issue is: your host and BIOS is new 
enough, so your USB controllers have the PCI Advanced Features that can be used 
to do FLR.
You can verify this by checking the PCI Capabilities List of your USB 
controllers: they should have a capability ID 0x13.
Please see tools/python/xen/util/pci.py (search for PCI_CAP_ID_AF, 
find_coassigned_devices) for details.

Thanks,
-- Dexuan



-----Original Message-----
From: Simon Horman [mailto:horms@xxxxxxxxxxxx] 
Sent: 2009年3月27日 5:35
To: Cui, Dexuan
Cc: Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] [PATCH]xend: fix hotplug for integrated devices

On Thu, Mar 26, 2009 at 01:28:33PM +0800, Cui, Dexuan wrote:
> Simon Horman wrote:
> > On Wed, Mar 25, 2009 at 06:12:03PM +0800, Cui, Dexuan wrote:
> >> For integrated devices(with bus number 0),  self.find_parent()
> >> returns None, causing a python exception here.  The patch adds the
> >> checking. 
> > 
> > Hi Dexuan,
> > 
> > I'm a little unsure what you mean by intergrated devices here.
> 
> Hi Simon,
> I mean the devices built with the motherboard.

Hi Dexuan,

Thanks for the clarification. Curiously I'm not seeing any problem
hotpluging any devices that a built into the mother board (e.g. USB
controller) that have a bus number of 0. Am I testing the wrong thing?

-- 
Simon Horman
  VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
  H: www.vergenet.net/~horms/             W: www.valinux.co.jp/en

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