netdev - Re: [PATCH V3 0/2] pci: Provide a flag to access VPD through function 0

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Message-ID: <CAErSpo7e-QtQQTj2yh_jG07vqU1j1YBez_9wrcrzOQs7+eDFng@mail.gmail.com>
Date:	Wed, 17 Jun 2015 11:44:01 -0500
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	"Rustad, Mark D" <mark.d.rustad@...el.com>
Cc:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Alexander Duyck <alexander.duyck@...il.com>
Subject: Re: [PATCH V3 0/2] pci: Provide a flag to access VPD through function 0

On Wed, Jun 17, 2015 at 11:29 AM, Rustad, Mark D
<mark.d.rustad@...el.com> wrote:
> + Alex
>
>> On Jun 5, 2015, at 2:59 PM, Rustad, Mark D <mark.d.rustad@...el.com> wrote:
>>
>>> On Jun 3, 2015, at 11:46 AM, Mark D Rustad <mark.d.rustad@...el.com> wrote:
>>>
>>> Many multi-function devices provide shared registers in extended
>>> config space for accessing VPD. The behavior of these registers
>>> means that the state must be tracked and access locked correctly
>>> for accesses not to hang or worse. One way to meet these needs is
>>> to always perform the accesses through function 0, thereby using
>>> the state tracking and mutex that already exists.
>>>
>>> To provide this behavior, add a dev_flags bit to indicate that this
>>> should be done. This bit can then be set for any non-zero function
>>> that needs to redirect such VPD access to function 0. Do not set
>>> this bit on the zero function or there will be an infinite recursion.
>>>
>>> The second patch uses this new flag to invoke this behavior on all
>>> multi-function Intel Ethernet devices.
>>>
>>> Signed-off-by: Mark Rustad <mark.d.rustad@...el.com>
>>>
>>> ---
>>> Changes in V2:
>>> - Corrected a spelling error in a log message
>>> - Added checks to see that the referenced function 0 is reasonable
>>> Changes in V3:
>>> - Don't leak a device reference
>>> - Check that function 0 has VPD
>>> - Make a helper for the function 0 checks
>>> - Moved a multifunction check to the quirk patch
>>
>> So does this series look acceptable now? I think I addressed the issues that Alex raised. Can these also be considered for -stable?
>
> More than a week has passed without any comment. Is this going to be accepted or is there still an issue?

Sorry, Mark, I've just been busy with other issues and haven't had a
chance to look at this yet.

Bjorn
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