linux-kernel - Re: regression: a0d4922 causes PCI host constroller problems

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Date:	Fri, 16 Jan 2009 16:48:59 +0100
From:	Simon Holm Thøgersen <odie@...aau.dk>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org
Subject: Re: regression: a0d4922 causes PCI host constroller problems

fre, 16 01 2009 kl. 13:06 +0100, skrev Rafael J. Wysocki:
> On Friday 16 January 2009, Simon Holm Thøgersen wrote:
> > fre, 16 01 2009 kl. 09:05 +0100, skrev Simon Holm Thøgersen:
> > > commit a0d4922 ("USB: fix up suspend and resume for PCI host
> > > controllers") causes a lot of these two lines to be logged:
> > > 
> > > uhci_hcd 0000:00:1d.2: host system error, PCI problems?
> > > uhci_hcd 0000:00:1d.2: host controller process error, something bad
> > > happened!
> > > 
> > > Normally they appear on resume after suspend to disk, but sometimes I'm
> > > not even sure I had to suspend to disk to see them. Also, it seems like
> > > they don't trigger if X has not been started, or at least they are much
> > > less likely to.
> > > 
> > > Reverting the patch restores normal operation.
> > > 
> > > No USB devices were attached BTW.
> > 
> > So this one has already been reported [1]. There was some mentioning of
> > a patch to try out instead of reverting, but I couldn't find it.
> > 
> > Rafael, did you have something else to suggest or can we please get a
> > revert of this one upstream asap before too many are wasting their time
> > on this one?
> 
> Yes, please try the patch from http://lkml.org/lkml/2009/1/13/144 and report
> back.

That fixes suspend to disk for me.

Thanks Rafael, you really do an important and fantastic job on the
regression work.


Simon Holm Thøgersen

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