Date: Tue, 3 Feb 2015 12:15:46 +0000
From: Catalin Marinas <catalin.marinas@arm.com>
To: Hanjun Guo <hanjun.guo@linaro.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>, Olof Johansson <olof@lixom.net>,
        Arnd Bergmann <arnd@arndb.de>, Mark Rutland <Mark.Rutland@arm.com>,
        "grant.likely@linaro.org" <grant.likely@linaro.org>,
        Will Deacon <Will.Deacon@arm.com>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
        "graeme.gregory@linaro.org" <graeme.gregory@linaro.org>,
        Sudeep Holla <Sudeep.Holla@arm.com>, "jcm@redhat.com" <jcm@redhat.com>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <Marc.Zyngier@arm.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Mark Brown <broonie@kernel.org>, Rob Herring <robh@kernel.org>,
        Robert Richter <rric@kernel.org>, Randy Dunlap <rdunlap@infradead.org>,
        Charles Garcia-Tobin <Charles.Garcia-Tobin@arm.com>,
        "phoenix.liyi@huawei.com" <phoenix.liyi@huawei.com>,
        Timur Tabi <timur@codeaurora.org>,
        Ashwin Chaugule <ashwinc@codeaurora.org>,
        "suravee.suthikulpanit@amd.com" <suravee.suthikulpanit@amd.com>,
        Mark Langsdorf <mlangsdo@redhat.com>,
        "wangyijing@huawei.com" <wangyijing@huawei.com>,
        "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linaro-acpi@lists.linaro.org" <linaro-acpi@lists.linaro.org>,
        Liviu Dudau <Liviu.Dudau@arm.com>
Subject: Re: [PATCH v8 06/21] ARM64 / ACPI: Introduce PCI stub functions for
 ACPI
Message-ID: <20150203121546.GD3677@e104818-lin.cambridge.arm.com>
References: <1422881149-8177-1-git-send-email-hanjun.guo@linaro.org>
 <1422881149-8177-7-git-send-email-hanjun.guo@linaro.org>
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On Mon, Feb 02, 2015 at 12:45:34PM +0000, Hanjun Guo wrote:
> diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
> index ce5836c..c17e7ea 100644
> --- a/arch/arm64/kernel/pci.c
> +++ b/arch/arm64/kernel/pci.c
> @@ -10,6 +10,7 @@
>   *
>   */
>  
> +#include <linux/acpi.h>
>  #include <linux/init.h>
>  #include <linux/io.h>
>  #include <linux/kernel.h>
> @@ -68,3 +69,27 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
>  	bus->domain_nr = domain;
>  }
>  #endif
> +
> +/*
> + * raw_pci_read/write - Platform-specific PCI config space access.
> + */
> +int raw_pci_read(unsigned int domain, unsigned int bus,
> +		  unsigned int devfn, int reg, int len, u32 *val)
> +{
> +	return -EINVAL;
> +}
> +
> +int raw_pci_write(unsigned int domain, unsigned int bus,
> +		unsigned int devfn, int reg, int len, u32 val)
> +{
> +	return -EINVAL;
> +}

You said you'll make these return -ENOSYS, which I think makes more
sense.

-- 
Catalin
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