linux-kernel - Re: [RFC 3/4] arm64: Do not call enable PCI resources when specify PCI_PROBE

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Message-ID: <4139946.HEULtVYyUh@wuerfel>
Date:	Mon, 29 Sep 2014 16:38:09 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	suravee.suthikulpanit@....com
Cc:	will.deacon@....com, liviu.dudau@....com, marc.zyngier@....com,
	mark.rutland@....com, catalin.marinas@....com,
	jason@...edaemon.net, tglx@...utronix.de, robh+dt@...nel.org,
	bhelgaas@...gle.com, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-doc@...r.kernel.org, devicetree@...r.kernel.org,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Liviu Dudau <Liviu.Dudau@....com>
Subject: Re: [RFC 3/4] arm64: Do not call enable PCI resources when specify PCI_PROBE_ONLY

On Sunday 28 September 2014 15:53:29 suravee.suthikulpanit@....com wrote:
> diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
> index ce5836c..7fd4d2b 100644
> --- a/arch/arm64/kernel/pci.c
> +++ b/arch/arm64/kernel/pci.c
> @@ -68,3 +68,11 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
>         bus->domain_nr = domain;
>  }
>  #endif
> +
> +int pcibios_enable_device(struct pci_dev *dev, int mask)
> +{
> +       if (pci_has_flag(PCI_PROBE_ONLY))
> +               return 0;
> +
> +       return pci_enable_resources(dev, mask);
> +}

This doesn't look arm64 specific to me, and there is already a generic
pcibios_enable_device() function in drivers/pci/pci.c. Would it
be possible to move the check for PCI_PROBE_ONLY there without breaking
other architectures?

If that works, please do so.

	Arnd
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