linux-kernel - Re: [linux-usb-devel] 2.6.18-rc6-mm1 (-mm2): ohci resume problem

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Date:	Wed, 13 Sep 2006 14:42:26 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	USB development list <linux-usb-devel@...ts.sourceforge.net>
Subject: Re: [linux-usb-devel] 2.6.18-rc6-mm1 (-mm2): ohci resume problem

On Wednesday, 13 September 2006 14:07, Rafael J. Wysocki wrote:
> On Saturday, 9 September 2006 00:57, Rafael J. Wysocki wrote:
> > On Friday, 8 September 2006 22:44, Alan Stern wrote:
> > > On Fri, 8 Sep 2006, Andrew Morton wrote:
> > > 
> > > > Alan, is this likely to be due to your USB PM changes?
> > > 
> > > It's possible.  Most of those changes are innocuous.  They add routines
> > > that don't get used until a later patch.  However one of them might be
> > > responsible.
> > 
> > Well, after recompiling the kernel for several times (because of a different
> > problem) I'm no longer able to reproduce the problem.
> 
> I have retested it on 2.6.18-rc6-mm1 and the problem sometimes happens.
> It's not readily reproducible, as I said before, and it apparently doesn't
> happen with gregkh-usb-usbcore-remove-usb_suspend_root_hub.patch
> reverted.

Well, I have reproduced it with gregkh-usb-usbcore-remove-usb_suspend_root_hub.patch
reverted too.

Attached is the output of dmesg from the failing case with USB_DEBUG set.
It covers two attempts to suspend to disk, the second one being unsuccessful,
with reloading the ohci_hcd module in between.  [This kernel also has your
other patch to prevent the second suspend from failing applied, but it doesn't
help.]

Greetings,
Rafael


-- 
You never change things by fighting the existing reality.
		R. Buckminster Fuller

Download attachment "dmesg.log.gz" of type "application/x-gzip" (17040 bytes)