linux-kernel - Re: linux-next: Tree for Aug 12 (include/linux/pci.h)

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Message-ID: <CAErSpo4+H6AJs9shVGN8fm9=GwPL9EzNcyMNt5FW81JGEA1sDA@mail.gmail.com>
Date:	Wed, 19 Aug 2015 23:16:06 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Tadeusz Struk <tadeusz.struk@...el.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Randy Dunlap <rdunlap@...radead.org>,
	linux-next list <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci <linux-pci@...r.kernel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Michal Marek <mmarek@...e.cz>,
	"Yann E. MORIN" <yann.morin.1998@...e.fr>,
	linux-kbuild <linux-kbuild@...r.kernel.org>
Subject: Re: linux-next: Tree for Aug 12 (include/linux/pci.h)

[+cc Yann, linux-kbuild]

On Wed, Aug 12, 2015 at 3:58 PM, Tadeusz Struk <tadeusz.struk@...el.com> wrote:
> On 08/12/2015 02:53 PM, Stephen Rothwell wrote:
>> On Wed, 12 Aug 2015 11:05:36 -0700 Randy Dunlap <rdunlap@...radead.org> wrote:
>>> >
>>> > on i386 or x86_64:
>>> >
>>> > Many (repeated) errors like this one:
>>> >
>>> > ../include/linux/pci.h:390:12: error: â€˜struct pci_devâ€™ has no member named â€˜physfnâ€™
>>> >
>>> > when CONFIG_PCI_ATS is not enabled.
>> Maybe caused by commit
>>
>>   dd0f368398ea ("crypto: qat - Add qat dh895xcc VF driver")
>>
>> from the crypto tree Which adds a
>>
>>   select PCI_IOV
>>
>> to drivers/crypto/qat/Kconfig without the necessary
>>
>>   select PCI
>>
>> but PCI_IOV selects PCI_ATS, so I am not sure what happened here.  I am
>> assuming that your config has PCI_IOV enabled?  What about PCI?
>
> There is a patch submitted, but not yet applied
> https://patchwork.kernel.org/patch/6994171/
> maybe it will help?

I don't understand this.  In drivers/pci/Kconfig, we have:

  config PCI_IOV
    depends on PCI

and in drivers/crypto/qat/Kconfig, dd0f368398ea adds:

  config CRYPTO_DEV_QAT_DH895xCCVF
    select PCI_IOV

And apparently it's possible to end up with a .config with
CONFIG_PCI_IOV=y but CONFIG_PCI is not set?  That seems wrong, since
we declared that PCI_IOV depends on PCI.  Does select ignore that
dependency somehow?

Bjorn
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