linux-kernel - RE: [PATCH 2/2] misc: add real function open/read/write/ioctl/close for moxa_serial

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Date:	Mon, 25 Apr 2011 00:30:34 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jimmy Chen (陳永達) 
	<jimmy.chen@...a.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...e.de
Subject: RE: [PATCH 2/2] misc: add real function
 open/read/write/ioctl/close for moxa_serial_io driver

On Mon, 2011-04-25 at 14:44 +0800, Jimmy Chen (陳永達) wrote:
> From: Jimmy Chen <jimmy.chen@...a.com>
> 
> Add real function and GPL license.
> Check with script/checkpatch.pl

Just some trivia:
There is a mechanism used to prefix logging messages.

> diff --git a/drivers/misc/moxa_serial_io.c b/drivers/misc/moxa_serial_io.c

You could add

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

before any #include

> +#include <linux/module.h>
> +#include <linux/kernel.h>
[]
> +static int __init io_init_module(void)
> +{
> +	unsigned char val;
> +	printk(KERN_INFO "initializing MOXA SERIAL IO module\n");

And convert all the printks to pr_<level>

	pr_info("Initializing module\n");
> +
> +	if (misc_register(&dio_miscdev) != 0) {
> +		printk(KERN_INFO "Moxa serial io driver: Register misc fail !\n");

	pr_err("misc_register failed\n");

[]
> +	printk(KERN_INFO "Moxa V2100 serial io driver, version "
> +			MOXA_SERIAL_IO_VERSION ", " "init OK\n");

	pr_info("Initialized version %s\n", MOXA_SERIAL_IO_VERSION);

> +static void __exit io_cleanup_module(void)
> +{
> +	printk("cleaning up module\n");

	pr_info("Removed\n");


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