linux-kernel - Re: Machine crashes right *after* ~successful resume

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Date:	Mon, 27 Oct 2014 16:41:55 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Wilmer van der Gaast <wilmer@...st.net>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Pavel Machek <pavel@....cz>,
	Rafael Wysocki <rafael.j.wysocki@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Machine crashes right *after* ~successful resume

On Mon, Oct 27, 2014 at 3:22 PM, Wilmer van der Gaast <wilmer@...st.net> wrote:
> Hello,
>
> On 27-10-14 18:23, Yinghai Lu wrote:
>>
>>
>> 04:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892
>>
>> So that ITE will not work after suspend/resume?
>>
> Even after the first one already, you mean?

Yes.

>
> Honestly, I don't really know what its purpose is, and it doesn't have any
> child nodes in the PCI tree from what I can tell. Possibly because I don't
> have any PCI cards in the machine, just a PCIe video card - assuming this is
> a PCI bridge taking care of legacy PCI plugin cards?
>
>> Please apply 4 attached patches and try to remove the device like
>>
>> echo 1 > /sys/bus/pci/devices/0000\:04\:00.0/remove
>> echo 1 > /sys/bus/pci/devices/0000\:00\:1c.3/pcie_link_disable
>>
>> before suspend/resume test.
>>
> That worked! Resumed properly now.
>
> Full log in http://gaast.net/~wilmer/.lkml/good3.17.txt . Including the PCI
> dump at boot time, where that device doesn't dump just ff's.

Can you only apply the patch that revert enable bridge early and
two pci dump patches to see if 04:00.0 readout is 0xff?

Thanks

Yinghai
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