linux-kernel - RE: [PATCH v7 4/7] PCI: Add fwnode_handle to pci

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Date:	Wed, 9 Dec 2015 16:54:25 +0000
From:	Jake Oshins <jakeo@...rosoft.com>
To:	Marc Zyngier <marc.zyngier@....com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	KY Srinivasan <kys@...rosoft.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"apw@...onical.com" <apw@...onical.com>,
	"vkuznets@...hat.com" <vkuznets@...hat.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: RE: [PATCH v7 4/7] PCI: Add fwnode_handle to pci_sysdata

> -----Original Message-----
> From: Marc Zyngier [mailto:marc.zyngier@....com]
> Sent: Wednesday, December 9, 2015 8:51 AM
> To: Jake Oshins <jakeo@...rosoft.com>; gregkh@...uxfoundation.org; KY
> Srinivasan <kys@...rosoft.com>; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; olaf@...fle.de; apw@...onical.com;
> vkuznets@...hat.com; tglx@...utronix.de; Haiyang Zhang
> <haiyangz@...rosoft.com>; bhelgaas@...gle.com; linux-
> pci@...r.kernel.org
> Subject: Re: [PATCH v7 4/7] PCI: Add fwnode_handle to pci_sysdata
> 
> On 05/12/15 00:36, jakeo@...rosoft.com wrote:
> > From: Jake Oshins <jakeo@...rosoft.com>
> >
> > This patch adds an fwnode_handle to struct pci_sysdata, which is
> > used by the next patch in the series when trying to locate an
> > IRQ domain associated with a root PCI bus.
> >
> > Signed-off-by: Jake Oshins <jakeo@...rosoft.com>
> > ---
> >  arch/x86/include/asm/pci.h | 15 +++++++++++++++
> >  include/asm-generic/pci.h  |  4 ++++
> >  2 files changed, 19 insertions(+)
> >
> 
> [...]
> 
> > diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h
> > index f24bc51..4092886 100644
> > --- a/include/asm-generic/pci.h
> > +++ b/include/asm-generic/pci.h
> > @@ -21,4 +21,8 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev
> *dev, int channel)
> >  #define PCI_DMA_BUS_IS_PHYS	(1)
> >  #endif
> >
> > +#ifndef pci_root_bus_fwnode
> > +#define pci_root_bus_fwnode(bus)	((void)(bus), NULL)
> > +#endif
> > +
> >  #endif /* _ASM_GENERIC_PCI_H */
> >
> 
> This breaks at least arm64 (as you can see from the reply to patch #5,
> because it does have its own asm/pci.h. Instead, how about moving this
> to linux/pci.h, just after the include of asm/pci.h? I just gave it a
> go, and it seems to work nicely (the first hunk fixes the rest of the
> arm64 compile issue):

Thank you.  I was just working through how to do that.  I lost a couple of days trying to figure out how to cross-compile for arm64 to check that any fix that I made actually worked.  (In the process, I've completely messed up my development machine.  Any pointers to the right strategy would be appreciated.)

-- Jake Oshins
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