linux-kernel - Re: [RFC]Is usb port number fixed?

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Message-ID: <20120424022425.GA5565@udknight>
Date:	Tue, 24 Apr 2012 10:24:25 +0800
From:	Wang YanQing <udknight@...il.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Anil Nair <anilcoll90@...il.com>, Greg KH <greg@...ah.com>,
	lkml <linux-kernel@...r.kernel.org>, linux-usb@...r.kernel.org
Subject: Re: [RFC]Is usb port number fixed?

On Mon, Apr 23, 2012 at 11:13:06AM -0400, Alan Stern wrote:
> > Indeed, I never meat the situation lspci output different bus number on the same machine.
> > Any more comment?
> 
> Try unloading ehci-hcd, uhci-hcd, and ohci-hcd, and then reloading them 
> in different orders.  Depending on what sort of hardware you have, the 
> bus numbers will change.
Yes, usb host control live on the pci bus, depend on the usb host control probe order,
and usb bus register order, the usb bus number maybe change,
I make a mistake between the pci bus number and usb bus number.
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