linux-kernel - Re: [PATCH v7 2/5] irqchip/irq-goldfish-pic: Add Goldfish PIC driver

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Date:   Thu, 02 Nov 2017 09:34:39 -0700
From:   Joe Perches <joe@...ches.com>
To:     Aleksandar Markovic <aleksandar.markovic@...rk.com>,
        linux-mips@...ux-mips.org
Cc:     Miodrag Dinic <miodrag.dinic@...s.com>,
        Goran Ferenc <goran.ferenc@...s.com>,
        Aleksandar Markovic <aleksandar.markovic@...s.com>,
        "David S. Miller" <davem@...emloft.net>,
        Douglas Leung <douglas.leung@...s.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        James Hogan <james.hogan@...s.com>,
        Jason Cooper <jason@...edaemon.net>,
        linux-kernel@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Miodrag Dinic <miodrag.dinic@...tec.com>,
        Paul Burton <paul.burton@...s.com>,
        Petar Jovanovic <petar.jovanovic@...s.com>,
        Raghu Gandham <raghu.gandham@...s.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v7 2/5] irqchip/irq-goldfish-pic: Add Goldfish PIC driver

On Thu, 2017-11-02 at 17:21 +0100, Aleksandar Markovic wrote:
> From: Miodrag Dinic <miodrag.dinic@...s.com>
> 
> Add device driver for a virtual programmable interrupt controller
> 
> The virtual PIC is designed as a device tree-based interrupt controller.
> 
> The compatible string used by OS for binding the driver is
> "google,goldfish-pic".
> 
> Signed-off-by: Miodrag Dinic <miodrag.dinic@...s.com>
> Signed-off-by: Goran Ferenc <goran.ferenc@...s.com>
> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@...s.com>
> wq

vi much?

> diff --git a/drivers/irqchip/irq-goldfish-pic.c b/drivers/irqchip/irq-goldfish-pic.c
[]
> @@ -0,0 +1,134 @@
> +/*
> + * Driver for MIPS Goldfish Programmable Interrupt Controller.
> + *
> + * Author: Miodrag Dinic <miodrag.dinic@...s.com>
> + *
> + * This program is free software; you can redistribute	it and/or modify it
> + * under  the terms of	the GNU General	 Public License as published by the
> + * Free Software Foundation;  either version 2 of the  License, or (at your
> + * option) any later version.
> + */

Odd mix of spaces and tabs

It'd be good to add a #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
before any #include so the pr_<level> output is prefixed appropriately.

> +#include <linux/interrupt.h>
> +#include <linux/irq.h>
> +#include <linux/irqchip.h>
> +#include <linux/irqchip/chained_irq.h>
> +#include <linux/irqdomain.h>
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
[]
> +static int __init goldfish_pic_of_init(struct device_node *of_node,
> +				       struct device_node *parent)
> +{
[]
> +	parent_irq = irq_of_parse_and_map(of_node, 0);
> +	if (!parent_irq) {
> +		pr_err("Failed to map Goldfish PIC parent IRQ!\n");

So these could become

		pr_err("Failed to map parent IRQ\n");

> +		ret = -EINVAL;
> +		goto out_free;
> +	}
> +
> +	gfpic->base = of_iomap(of_node, 0);
> +	if (!gfpic->base) {
> +		pr_err("Failed to map Goldfish PIC base!\n");

		pr_err("Failed to map base\n");

etc...