linux-kernel - Re: regression in 4.0.0-rc1 with r8169 ethernet

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Date:	Sat, 28 Feb 2015 00:36:34 -0800
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Thomas Voegtle <tv@...96.de>, Dave Airlie <airlied@...il.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Lv Zheng <lv.zheng@...el.com>
Subject: Re: regression in 4.0.0-rc1 with r8169 ethernet

Hi Jiang,

>>> I have the same problem with a Asrock Q1900B-ITX mainboard with 
>>> a Intel Celeron J1900 onboard.
>>> 
>>> I did a bisect and ended up with:
>>> 
>>> 593669c2ac0fe18baee04a3cd5539a148aa48574 is the first bad commit
>>> 
>>> commit 593669c2ac0fe18baee04a3cd5539a148aa48574
>>> Author: Jiang Liu <jiang.liu@...ux.intel.com>
>>> Date:   Thu Feb 5 13:44:46 2015 +0800
>>> 
>>>     x86/PCI/ACPI: Use common ACPI resource interfaces to simplify 
>>> implementation
>>> 
>>> 
>>> I can revert this quite big commit on current git head (4f671fe) with no 
>>> problems and then everything is fine again.
>> 
>> Thanks for nailing this one!
>> 
>> It really wasn't supposed to make any functional difference, though, so there
>> must be some subtle mistake that escaped everyone in it.
>> 
>> I'll have a look at that and hopefully Jiang Liu will be able to help in the
>> meantime too.
> Hi all,
> 	Sorry for slow response, just return from Chinese New Holidays:)
> Hi Thomas,
> 	Could you please help to provide the dmesgs before and after the
> revert?

just grab a Minnowboard Max and test this by yourself. It has the same problem. The MAC address is ff:ff:ff:ff:ff:ff with this patch. Once I reverted it, the MAC address is correctly read again.

Regards

Marcel

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