linux-kernel - Re: [3/3] 2.6.23-rc2: known regressions v2

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Date:	Wed, 8 Aug 2007 16:07:59 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	USB development list <linux-usb-devel@...ts.sourceforge.net>,
	Greg KH <gregkh@...e.de>, Mark Hindley <mark@...dley.org.uk>,
	Eric Biederman <ebiederm@...ssion.com>,
	<kexec@...ts.infradead.org>
Subject: Re: [3/3] 2.6.23-rc2: known regressions v2

On Wed, 8 Aug 2007, Michal Piotrowski wrote:

> USB
> 
> Subject         : 2.6.23-rc1: uhci_hcd. irq 4: nobody cared
> References      : http://lkml.org/lkml/2007/7/29/75
> Last known good : ?
> Submitter       : Mark Hindley <mark@...dley.org.uk>
> Caused-By       : ?
> Handled-By      : Alan Stern <stern@...land.harvard.edu>
> Status          : unknown

Mark has determined that this is not a regression but rather an 
already-existing problem, caused by invoking kexec from within an xterm 
window.  See

	http://marc.info/?l=linux-usb-users&m=118648557203179&w=2

Of course, this means there's liable to be something wrong with the way
kexec interacts with uhci-hcd or the other drivers sharing the same 
IRQ.  Failure to call the shutdown() method could cause the problem.  
But I don't see why using an xterm should make any difference (unless 
the only device being used was a mouse, and it was not in use while X 
wasn't running).

Alan Stern

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