linux-kernel - Re: [PATCH -v2 0/7] PCI: pcie hotplug related patch

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Message-ID: <4F2B562F.9070008@jp.fujitsu.com>
Date:	Fri, 03 Feb 2012 12:36:15 +0900
From:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Matthew Wilcox <matthew@....cx>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -v2 0/7] PCI: pcie hotplug related patch

(2012/02/03 5:39), Yinghai Lu wrote:
> On Thu, Feb 2, 2012 at 2:00 AM, Kenji Kaneshige
> <kaneshige.kenji@...fujitsu.com>  wrote:
>> Yinghai, Jesse,
>>
>> I tested pciehp with your set of patches. I have some comments below.
>>
>> (1) I got a following warning message on compiling the patch [5/7].
>>
>>     drivers/pci/hotplug/pciehp_hpc.c:281: warning:
>> 'pcie_wait_link_not_active' defined but not used
>>
>> (2) I got following warning messages on compiling the patch [6/7]
>>
>>     drivers/pci/hotplug/pciehp_hpc.c:381: warning: 'pciehp_link_enable'
>> defined but not used
>>     drivers/pci/hotplug/pciehp_hpc.c:386: warning: 'pciehp_link_disable'
>> defined but not used
>>
>> (3) I've asked Naoki Yanagimoto, who reported that configuration read
>>     on some hot-added PCIe device returns invalid value, to test the
>>     patch. Unfortunately, the problem happens with your patch. But
>>     after some discussion and testing, it turned out that problem doesn't
>>     happen when the same card with updated bios is used. So it seems the
>>     problem is in PCIe card side.
>>
>> As a result, problems I found are (1) and (2). Please fix those.
>> Other than that, pciehp seems to work well.
>>
>> Tested-by: Kenji Kaneshige<kaneshige.kenji@...fujitsu.com>
>>
>
> Great. thanks for confirmation.
>
> for (1) and (2), patch 5, and 6 will add some helper functions and
> they will be used by patch 7.
>
> so when patch 7 is applied, there will be no compiling warning anymore.

I know that.
But I think each patch should be compiled without warnings.
Patch 5/7 and 6/7 are useless without 7/7. How about merging them?

Regards,
Kenji Kaneshige
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