linux-kernel - Re: [BUGFIX v2 0/4] fix bug 56531, 59501 and 59581

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Date:	Mon, 17 Jun 2013 01:33:57 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	"Alexander E. Patrakov" <patrakov@...il.com>
CC:	Jiang Liu <jiang.liu@...wei.com>, alexdeucher@...il.com,
	"Rafael J . Wysocki" <rjw@...k.pl>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Yijing Wang <wangyijing@...wei.com>,
	linux-acpi@...r.kernel.org,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [BUGFIX v2 0/4] fix bug 56531, 59501 and 59581

On 06/15/2013 02:42 PM, Alexander E. Patrakov wrote:
> 2013/6/15 Jiang Liu <jiang.liu@...wei.com>:
>> Alexander E. Patrakov <patrakov@...il.com> reports two bugs related to
>> dock station support on Sony VAIO VPCZ23A4R. Actually there are at least
>> four bugs related to Sony VAIO VPCZ23A4R dock support.
>> 1) can't correctly detect hotplug slot for dock state
>> 2) resource leak on undocking
>> 3) resource allocation failure for dock devices
>> 4) one bug in intel_snd_hda driver
> 5) one or two bugs in radeon driver
> 
> As for the subject - only a hotplug-related part of bug 59581 is fixed.
> 
>> Hi Alexander, could you please help to test the whole patchset?
>> Really get sleepy, it's already 3 oclock now, so please forgive me
>> if there any stupid mistakes.
> 
> I have tested this patchset on top of 3.10-rc5 using the following two
> testcases.
> 
> 1. Boot docked with radeon blacklisted. Switch to text-based virtual
> console, undock, dock, modprobe radeon, rmmod radeon, undock, dock,
> modprobe radeon again. Tested in this sequence because Alex Deucher
> told me in bug 59681 to rmmod radeon before undocking.
> 
> 2. Boot undocked, with radeon not blacklisted. Stay in X. Dock,
> undock, dock, undock, dock.
> 
> Both cases work, and exhibit similar backtraces in dmesg. So I am
> attaching a dmesg only from the first testcase. Please look for "INFO:
> trying to register non-static key" and for "*ERROR* Memory manager not
> clean. Delaying takedown". I understand that the second trace is
> unrelated to this patchset, but would like you to fix the first.
Hi Alexander,
	Great thanks for your testing!
	I have investigated the first issue but still have no idea about it.
According to source code, everything should be OK.
The r8169 driver has invoked INIT_WORK(&tp->wk.work, rtl_task) to
initialize the work item, so it shouldn't trigger the warning.
Have you found this issue in other test cases?
Regards!
Gerry

> 
> Note that the snd_hda_intel bug somehow didn't manifest itself today,
> probably because the TV that is connected to the HDMI output of the
> radeon card was off and because Xorg never really tried to use the
> card.
> 
> --
> Alexander E. Patrakov
> 

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