On Fri, Dec 18, 2015 at 03:57:53PM +0100, Arnd Bergmann wrote:
> The newly added MSI support for iproc causes a link error when its
> Kconfig option is disabled:
>
> ERROR: "iproc_msi_exit" [drivers/pci/host/pcie-iproc.ko] undefined!
> ERROR: "iproc_msi_init" [drivers/pci/host/pcie-iproc.ko] undefined!
>
> This changes the header file so we use stub functions whenever
> the driver is not built, even when CONFIG_MSI is enabled.
>
> As the Kconfig logic for the driver is a bit off, I'm rectifying
> that as well, by making it depend on the specific drivers that
> call into the driver, and moving the option behind those instead
> of before them.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Fixes: 610894347cbf ("PCI: iproc: Add iProc PCIe MSI support")
Applied with Ray's Reviewed-by to pci/host-iproc for v4.5, thanks!
Actually, since 610894347cbf hasn't been merged upstream yet, I just
squashed this fix into it and updated "pci/host-iproc" and "next".
> ---
> Found on ARM randconfig builds a couple of days ago
>
> diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
> index 490476e172fd..d7c05894af70 100644
> --- a/drivers/pci/host/Kconfig
> +++ b/drivers/pci/host/Kconfig
> @@ -124,15 +124,6 @@ config PCIE_IPROC
> iProc family of SoCs. An appropriate bus interface driver needs
> to be enabled to select this.
>
> -config PCIE_IPROC_MSI
> - bool "Broadcom iProc PCIe MSI support"
> - depends on ARCH_BCM_IPROC && PCI_MSI
> - select PCI_MSI_IRQ_DOMAIN
> - default ARCH_BCM_IPROC
> - help
> - Say Y here if you want to enable MSI support for Broadcom's iProc
> - PCIe controller
> -
> config PCIE_IPROC_PLATFORM
> tristate "Broadcom iProc PCIe platform bus driver"
> depends on ARCH_BCM_IPROC || (ARM && COMPILE_TEST)
> @@ -154,6 +145,16 @@ config PCIE_IPROC_BCMA
> Say Y here if you want to use the Broadcom iProc PCIe controller
> through the BCMA bus interface
>
> +config PCIE_IPROC_MSI
> + bool "Broadcom iProc PCIe MSI support"
> + depends on PCIE_IPROC_PLATFORM || PCIE_IPROC_BCMA
> + depends on PCI_MSI
> + select PCI_MSI_IRQ_DOMAIN
> + default ARCH_BCM_IPROC
> + help
> + Say Y here if you want to enable MSI support for Broadcom's iProc
> + PCIe controller
> +
> config PCIE_ALTERA
> bool "Altera PCIe controller"
> depends on ARM || NIOS2
> diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h
> index 6def23a7eb54..e84d93c53c7b 100644
> --- a/drivers/pci/host/pcie-iproc.h
> +++ b/drivers/pci/host/pcie-iproc.h
> @@ -79,7 +79,7 @@ struct iproc_pcie {
> int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
> int iproc_pcie_remove(struct iproc_pcie *pcie);
>
> -#ifdef CONFIG_PCI_MSI
> +#ifdef CONFIG_PCIE_IPROC_MSI
> int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node);
> void iproc_msi_exit(struct iproc_pcie *pcie);
> #else
>
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