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Date:	Tue, 01 Jan 2013 22:44:01 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [REGRESSION 3.8-r1] broken pci irq/pm state for e1000e device

Konstantin Khlebnikov wrote:
> Seems like it's unrelated to e1000e driver itself, because I tried to
> revert all it's changes down to 3.6 one by one and it does not help.
>
> Looks like regression somewhere in pci-bus irq or power-management.
> because I see underflow of counter pci_dev->enable_cnt:
>
> root@...g:/sys/bus/pci/devices# cat 0000\:00\:19.0/enable ; modprobe e1000e ; sleep 2 ; rmmod e1000e ; cat 0000\:00\:19.0/enable
> 4294967288
> 4294967287
>
> without sleep in the middle it does not work

Hmm, 3.7 also affected. This is not good.

root@...g:/sys/bus/pci/devices# cat 0000\:00\:19.0/enable
4294967293
root@...g:/sys/bus/pci/devices# uname -a
Linux zurg 3.7.1-zurg #631 SMP Sat Dec 29 11:54:15 MSK 2012 x86_64 GNU/Linux

>
> my kernel config in attachment
> hardware: lenovo thinkpad x220
>
> root@...g:/sys/bus/pci/devices# uname -a
> Linux zurg 3.8.0-rc1-zurg-00091-g4a490b7 #632 SMP Tue Jan 1 20:02:31 MSK 2013 x86_64 GNU/Linux
>
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