linux-kernel - Re: [PATCH] PCI: Remove host driver Kconfig selection of CONFIG

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Date:   Wed, 30 May 2018 11:45:57 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     linux-pci@...r.kernel.org
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Richard Zhu <hongxing.zhu@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Pratyush Anand <pratyush.anand@...il.com>,
        Murali Karicheri <m-karicheri2@...com>,
        Zhou Wang <wangzhou1@...ilicon.com>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Niklas Cassel <niklas.cassel@...s.com>,
        Jesper Nilsson <jesper.nilsson@...s.com>,
        Xiaowei Song <songxiaowei@...ilicon.com>,
        Binghui Wang <wangbinghui@...ilicon.com>,
        Jianguo Sun <sunjianguo1@...wei.com>,
        Shawn Guo <shawn.guo@...aro.org>,
        Tanmay Inamdar <tinamdar@....com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: Remove host driver Kconfig selection of
 CONFIG_PCIEPORTBUS

On Fri, May 18, 2018 at 05:31:07PM -0500, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@...gle.com>
> 
> Host bridge drivers do not use the portdrv interfaces (struct pcie_device,
> struct pcie_port_service_driver, pcie_port_service_register(), etc), and
> they should not select CONFIG_PCIEPORTBUS.
> 
> If users need the portdrv services, they can select CONFIG_PCIEPORTBUS just
> like all other PCI users.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>

I applied this to pci/kconfig for v4.18.

> ---
>  drivers/pci/dwc/Kconfig  |   10 ----------
>  drivers/pci/host/Kconfig |    2 --
>  2 files changed, 12 deletions(-)
> 
> diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
> index 2f3f5c50aa48..678390a77ba1 100644
> --- a/drivers/pci/dwc/Kconfig
> +++ b/drivers/pci/dwc/Kconfig
> @@ -68,7 +68,6 @@ config PCI_EXYNOS
>  	depends on PCI
>  	depends on SOC_EXYNOS5440
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  
>  config PCI_IMX6
> @@ -76,7 +75,6 @@ config PCI_IMX6
>  	depends on PCI
>  	depends on SOC_IMX6Q
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  
>  config PCIE_SPEAR13XX
> @@ -84,7 +82,6 @@ config PCIE_SPEAR13XX
>  	depends on PCI
>  	depends on ARCH_SPEAR13XX
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	help
>  	  Say Y here if you want PCIe support on SPEAr13XX SoCs.
> @@ -94,7 +91,6 @@ config PCI_KEYSTONE
>  	depends on PCI
>  	depends on ARCH_KEYSTONE
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	help
>  	  Say Y here if you want to enable PCI controller support on Keystone
> @@ -117,7 +113,6 @@ config PCI_HISI
>  	bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"
>  	depends on PCI
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	select PCI_HOST_COMMON
>  	help
> @@ -129,7 +124,6 @@ config PCIE_QCOM
>  	depends on PCI
>  	depends on ARCH_QCOM && OF
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	help
>  	  Say Y here to enable PCIe controller support on Qualcomm SoCs. The
> @@ -141,7 +135,6 @@ config PCIE_ARMADA_8K
>  	depends on PCI
>  	depends on ARCH_MVEBU
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	help
>  	  Say Y here if you want to enable PCIe controller support on
> @@ -156,7 +149,6 @@ config PCIE_ARTPEC6_HOST
>  	bool "Axis ARTPEC-6 PCIe controller Host Mode"
>  	depends on MACH_ARTPEC6
>  	depends on PCI && PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	select PCIE_ARTPEC6
>  	help
> @@ -178,7 +170,6 @@ config PCIE_KIRIN
>  	bool "HiSilicon Kirin series SoCs PCIe controllers"
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	depends on PCI
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	help
>  	  Say Y here if you want PCIe controller support
> @@ -189,7 +180,6 @@ config PCIE_HISI_STB
>  	depends on ARCH_HISI
>  	depends on PCI
>  	depends on PCI_MSI_IRQ_DOMAIN
> -	select PCIEPORTBUS
>  	select PCIE_DW_HOST
>  	help
>            Say Y here if you want PCIe controller support on HiSilicon STB SoCs
> diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
> index 0d0177ce436c..90f0cc9dfd95 100644
> --- a/drivers/pci/host/Kconfig
> +++ b/drivers/pci/host/Kconfig
> @@ -83,7 +83,6 @@ config PCI_XGENE
>  	bool "X-Gene PCIe controller"
>  	depends on ARM64
>  	depends on OF || (ACPI && PCI_QUIRKS)
> -	select PCIEPORTBUS
>  	help
>  	  Say Y here if you want internal PCI support on APM X-Gene SoC.
>  	  There are 5 internal PCIe ports available. Each port is GEN3 capable
> @@ -194,7 +193,6 @@ config PCIE_MEDIATEK
>  	depends on (ARM || ARM64) && (ARCH_MEDIATEK || COMPILE_TEST)
>  	depends on OF
>  	depends on PCI
> -	select PCIEPORTBUS
>  	help
>  	  Say Y here if you want to enable PCIe controller support on
>  	  MediaTek SoCs.
>