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

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Date:	Thu, 2 Feb 2012 12:39:01 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
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

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.

Thanks

Yinghai
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