linux-kernel - Re: [BUG, Regression, bisected] USB mouse causes bug on 1st insert, ignored on 2nd insert, lsusb stuck at usbdev

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Date:	Tue, 21 Sep 2010 09:50:48 -0700
From:	Greg KH <gregkh@...e.de>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Jiri Kosina <jkosina@...e.cz>, Phil Turmel <philip@...mel.org>,
	Mat <jackdachef@...il.com>,
	Guillaume Chazarain <guichaz@...il.com>,
	linux-kernel@...r.kernel.org, Oliver Neukum <oliver@...kum.org>,
	Alan Ott <alan@...nal11.us>, linux-usb@...r.kernel.org,
	linux-input@...r.kernel.org, Andreas Bombe <aeb@...ian.org>,
	Alex Riesen <raa.lkml@...il.com>,
	Gabriel C <nix.or.die@...glemail.com>
Subject: Re: [BUG, Regression, bisected] USB mouse causes bug on 1st
 insert, ignored on 2nd insert, lsusb stuck at usbdev_open

On Tue, Sep 21, 2010 at 10:30:18AM -0400, Alan Stern wrote:
> On Tue, 21 Sep 2010, Jiri Kosina wrote:
> 
> > I have just found out that it's actually CONFIG_USB_DYNAMIC_MINORS which 
> > makes the difference. When unset, the problem doesn't trigger, and 
> > usb_find_interface() always returns the proper interface. When 
> > CONFIG_USB_DYNAMIC_MINORS is being used, the oops happen.
> > 
> > I'll look into that.
> 
> Apparently the problem is that intf->minors doesn't get initialized 
> properly.  This patch should fix it.  Everybody, please try it out.

Wow, what happened to suddenly cause this?  Nothing has changed here in
a long time.

wierd.

thanks,

greg k-h
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