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Date:   Mon, 21 May 2018 15:03:36 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To:     Bjorn Helgaas <helgaas@kernel.org>
Cc:     honghui.zhang@mediatek.com, marc.zyngier@arm.com,
        bhelgaas@google.com, matthias.bgg@gmail.com,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-pci@vger.kernel.org,
        linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
        yingjoe.chen@mediatek.com, eddie.huang@mediatek.com,
        ryder.lee@mediatek.com, hongkun.cao@mediatek.com,
        youlin.pei@mediatek.com, yong.wu@mediatek.com,
        yt.shen@mediatek.com, sean.wang@mediatek.com,
        xinping.qian@mediatek.com
Subject: Re: [PATCH v7 2/2] PCI: mediatek: Using chained IRQ to setup IRQ
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On Fri, May 18, 2018 at 02:51:54PM -0500, Bjorn Helgaas wrote:
> On Fri, May 04, 2018 at 01:47:33PM +0800, honghui.zhang@mediatek.com wrote:
> > From: Honghui Zhang <honghui.zhang@mediatek.com>
> > 
> > Using irq_chip solution to setup IRQs in order to consist
> > with IRQ framework.
> > 
> > Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
> > Acked-by: Ryder Lee <ryder.lee@mediatek.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

Actually I amended your patch, since I do not think the deletion above
belongs in this commit (I agree that's completely useless but that's
not this patch that we should remove it).

Lorenzo

> +	depends on PCI_MSI_IRQ_DOMAIN