linux-kernel - Re: 2.6.31-rc0-git: lsusb stopped working?

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Message-ID: <20090623161334.GA503@kroah.com>
Date:	Tue, 23 Jun 2009 09:13:34 -0700
From:	Greg KH <greg@...ah.com>
To:	Frans Pop <elendil@...net.nl>
Cc:	Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.31-rc0-git: lsusb stopped working?

On Tue, Jun 23, 2009 at 05:09:44PM +0200, Frans Pop wrote:
> Pavel Machek wrote:
> > On thinkpad x60. Otherwise usb seems to work, including btusb dongle.
> > 
> > /proc/bus/usb does not seem to exists.
> 
> Correct. usbfs has been removed in 2.6.31.

To be pedantic, no, the filesystem has not been "removed".  Only the
user-mountable filesystem option has been moved under CONFIG_EMBEDDED,
as there should not be any userspace code that still uses that interface
into usbfs.

The recommended solution is to use the device nodes for usbfs, which
have been around for a few years now, and usually show up under
/dev/bus/usb/ and have the proper ACL and permissions that the
filesystem nodes can't have for a variety of reasons.

If for some reason you can not use the /dev/bus/usb/ device nodes, you
can enable the config option by turning on CONFIG_EMBEDDED.

Hope this helps,

greg k-h
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