linux-kernel - Re: [PATCH] PCI: mediatek: take use of PCI_NUM

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Date:   Wed, 30 Aug 2017 09:44:58 +0800
From:   Honghui Zhang <honghui.zhang@...iatek.com>
To:     <bhelgaas@...gle.com>
CC:     <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] PCI: mediatek: take use of PCI_NUM_INTX

On Wed, 2017-08-30 at 09:19 +0800, honghui.zhang@...iatek.com wrote:
> From: Honghui Zhang <honghui.zhang@...iatek.com>
> 
> Switch from using a custom NUM_INTX macro to the generic PCI_NUM_INTX
> definition for the number of INTx interrupts.
> 
> Signed-off-by: Honghui Zhang <honghui.zhang@...iatek.com>
> ---
>  drivers/pci/host/pcie-mediatek.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 

Hi, Bjorn, Ryder,
	this patch is based on Paul's v7 version of patch[1]("Move enum
pci_interrupt_pin to linux/pci.h").
[1]http://www.spinics.net/lists/linux-pci/msg63891.html

Thanks.

> diff --git a/drivers/pci/host/pcie-mediatek.c b/drivers/pci/host/pcie-mediatek.c
> index c567996..5c0ce9b 100644
> --- a/drivers/pci/host/pcie-mediatek.c
> +++ b/drivers/pci/host/pcie-mediatek.c
> @@ -77,7 +77,6 @@
>  #define PCIE_INT_MASK		0x420
>  #define INTX_MASK		GENMASK(19, 16)
>  #define INTX_SHIFT		16
> -#define INTX_NUM		4
>  #define PCIE_INT_STATUS		0x424
>  #define MSI_STATUS		BIT(23)
>  #define PCIE_IMSI_STATUS	0x42c
> @@ -576,7 +575,7 @@ static int mtk_pcie_init_irq_domain(struct mtk_pcie_port *port,
>  		return -ENODEV;
>  	}
>  
> -	port->irq_domain = irq_domain_add_linear(pcie_intc_node, INTX_NUM,
> +	port->irq_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
>  						 &intx_domain_ops, port);
>  	if (!port->irq_domain) {
>  		dev_err(dev, "failed to get INTx IRQ domain\n");
> @@ -594,7 +593,7 @@ static irqreturn_t mtk_pcie_intr_handler(int irq, void *data)
>  	u32 bit = INTX_SHIFT;
>  
>  	while ((status = readl(port->base + PCIE_INT_STATUS)) & INTX_MASK) {
> -		for_each_set_bit_from(bit, &status, INTX_NUM + INTX_SHIFT) {
> +		for_each_set_bit_from(bit, &status, PCI_NUM_INTX + INTX_SHIFT) {
>  			/* Clear the INTx */
>  			writel(1 << bit, port->base + PCIE_INT_STATUS);
>  			virq = irq_find_mapping(port->irq_domain,