linux-kernel - Re: [RFC][PATCH 01/10] arm: mxc: New interrupt controller (TZIC) for i.MX5 family

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Date:	Fri, 4 Dec 2009 10:38:04 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Amit Kucheria <amit.kucheria@...onical.com>
Cc:	List Linux Kernel <linux-kernel@...r.kernel.org>,
	Dinh.Nguyen@...escale.com, s.hauer@...gutronix.de,
	grant.likely@...retlab.ca, r.herring@...escale.com,
	linux-arm-kernel@...ts.infradead.org, daniel@...aq.de,
	valentin.longchamp@...l.ch
Subject: Re: [RFC][PATCH 01/10] arm: mxc: New interrupt controller (TZIC)
	for i.MX5 family

A few comments:

On Fri, Dec 04, 2009 at 04:47:01AM +0200, Amit Kucheria wrote:
> +#include <linux/module.h>
> +#include <linux/moduleparam.h>
> +#include <linux/init.h>
> +#include <linux/device.h>
> +#include <linux/errno.h>
> +#include <mach/hardware.h>
> +#include <linux/io.h>

linux/ includes all together please.

> +void __iomem *tzic_base;

static?

> +
> +/*!

This isn't kerneldoc standard.

> +static int mxc_set_wake_irq(unsigned int irq, unsigned int enable)
> +{
> +	unsigned int index, off;
> +
> +	index = irq >> 5;
> +	off = irq & 0x1F;
> +
> +	if (index > 3)
> +		return -1;

Never use -1 as an error code.  -1 is bad.  Look up in
asm-generic/errno-base.h to see what error code 1 means.

Please chose a far better error code.  Same goes for any other uses
of '-1' in this kind of context.

> +	printk(KERN_INFO "MXC IRQ initialized\n");

MXC or TZIC?
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