linux-kernel - Re: [PATCH v7 2/2] PCI: mediatek: Using chained IRQ to setup IRQ handle

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Date:   Fri, 18 May 2018 14:51:54 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     honghui.zhang@...iatek.com
Cc:     lorenzo.pieralisi@....com, marc.zyngier@....com,
        bhelgaas@...gle.com, matthias.bgg@...il.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        yingjoe.chen@...iatek.com, eddie.huang@...iatek.com,
        ryder.lee@...iatek.com, hongkun.cao@...iatek.com,
        youlin.pei@...iatek.com, yong.wu@...iatek.com,
        yt.shen@...iatek.com, sean.wang@...iatek.com,
        xinping.qian@...iatek.com
Subject: Re: [PATCH v7 2/2] PCI: mediatek: Using chained IRQ to setup IRQ
 handle

On Fri, May 04, 2018 at 01:47:33PM +0800, honghui.zhang@...iatek.com wrote:
> From: Honghui Zhang <honghui.zhang@...iatek.com>
> 
> Using irq_chip solution to setup IRQs in order to consist
> with IRQ framework.
> 
> Signed-off-by: Honghui Zhang <honghui.zhang@...iatek.com>
> Acked-by: Ryder Lee <ryder.lee@...iatek.com>
> ---
>  drivers/pci/host/pcie-mediatek.c | 206 ++++++++++++++++++++++-----------------
>  1 file changed, 115 insertions(+), 91 deletions(-)
> 
> diff --git a/drivers/pci/host/pcie-mediatek.c b/drivers/pci/host/pcie-mediatek.c
> index c3dc549..dabf1086 100644
> --- a/drivers/pci/host/pcie-mediatek.c
> +++ b/drivers/pci/host/pcie-mediatek.c
> ...

> -static int mtk_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
> -			    irq_hw_number_t hwirq)
> +static struct msi_domain_info mtk_msi_domain_info = {

I think this patch should be amended to include this:

diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index 0d0177ce436c..368b70d9371b 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -193,7 +193,7 @@ config PCIE_MEDIATEK
 	bool "MediaTek PCIe controller"
 	depends on (ARM || ARM64) && (ARCH_MEDIATEK || COMPILE_TEST)
 	depends on OF
-	depends on PCI
+	depends on PCI_MSI_IRQ_DOMAIN
 	select PCIEPORTBUS
 	help
 	  Say Y here if you want to enable PCIe controller support on


Lorenzo, if you want to fold that in and update your branch, I can pull it.
If not, I can add a patch on top, which should only break compile-testing
bisection.