From: Wang YanQing <udknight@gmail.com>
To: lkml <linux-kernel@vger.kernel.org>, linux-usb@vger.kernel.org
Subject: Re: [RFC]Is usb port number fixed?
Date: Fri, 20 Apr 2012 17:37:38 +0800 [thread overview]
Message-ID: <20120420093738.GA12755@udknight> (raw)
In-Reply-To: <20120420092525.GA12660@udknight>
On Fri, Apr 20, 2012 at 05:25:25PM +0800, Wang YanQing wrote:
> Hi!
> when I execute the command below:
>
> "ls /sys/bus/usb/devices/"
>
> I get:
> "1-0:1.0 1-1 1-1:1.0 2-0:1.0 2-1 2-1.1 2-1:1.0 2-1.1:1.0 2-1.5 2-1.5:1.0 2-1.5:1.1 usb1 usb2"
>
> the output format is bus-port.port:config.interface
> I want to know whether the port number is fixed after I reboot machine time by time.
> And if it is fixed, then what make it.
>
> Thanks!
Make the question precise.
I assme there are two usb ports in my notebook at left and right separately.
When I plug mouse into
left usb port, I get 2-1.1:1.0
right usb port, I get 2-1.2:1.0
I want to know whether it is right that no matter how many times I reboot the machine,
the test result above will be the same.And if it will be the same, then why it will be the same.
next prev parent reply other threads:[~2012-04-20 9:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-20 9:25 [RFC]Is usb port number fixed? Wang YanQing
2012-04-20 9:37 ` Wang YanQing [this message]
2012-04-20 15:37 ` Greg KH
[not found] ` <CAHkwNT=VW8qF-7QRxpiaWkmQm0UFdsbahFLhT-PCc4OMnVs1Gg@mail.gmail.com>
2012-04-20 16:19 ` Greg KH
2012-04-21 0:32 ` Alan Stern
2012-04-21 5:56 ` Wang YanQing
2012-04-21 17:23 ` Alan Stern
[not found] <CAHkwNT=DTjdhZmEg+SFGOVi+ZcS-NpHWH8Hh3XV+-BPzHRC7NA@mail.gmail.com>
2012-04-22 12:47 ` Alan Stern
2012-04-23 1:52 ` Wang YanQing
2012-04-23 15:13 ` Alan Stern
2012-04-24 2:16 ` Wang YanQing
2012-04-24 14:14 ` Alan Stern
2012-04-24 15:58 ` Wang YanQing
2012-04-24 14:22 ` anil
2012-04-24 2:24 ` Wang YanQing
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