linux-kernel - Re: [PATCH] PCI: dwc: Add map irq callback

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Date:   Wed, 14 Aug 2019 00:36:05 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Dilip Kota <eswara.kota@...ux.intel.com>
Cc:     jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        andriy.shevchenko@...el.com
Subject: Re: [PATCH] PCI: dwc: Add map irq callback

On Wed, Aug 14, 2019 at 02:56:49PM +0800, Dilip Kota wrote:
> Certain platforms like Intel need to configure
> registers to enable the interrupts.
> Map Irq callback helps to perform platform specific
> configurations while assigning or enabling the interrupts.

This seems to miss the hunk that actually assigns the map_irq
callback.

> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index f93252d0da5b..5880d2b72ef8 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -470,7 +470,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
>  	bridge->sysdata = pp;
>  	bridge->busnr = pp->root_bus_nr;
>  	bridge->ops = &dw_pcie_ops;
> -	bridge->map_irq = of_irq_parse_and_map_pci;
> +	bridge->map_irq = pp->map_irq ? pp->map_irq : of_irq_parse_and_map_pci;

Pleae just use a classic if / else to make the code a little easier
to read.