Re: Probable module bug in linux-2.6.5-1.358

[Stephen Hemminger <shemminger@osdl.org>]

I can't reproduce your problem with a simple dummy character device.

-------------
/*
 * Minimum driver to test character device stuff.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License version 2 as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/device.h>

#define MYMAJOR	204

static int dummy_open(struct inode *inode, struct file *file)
{
	pr_info("dummy_open (%d)\n", iminor(inode));
	return 0;
}

static int dummy_release(struct inode *inode, struct file *file)
{
	pr_info("dummy_release (%d)\n", iminor(inode));
	return 0;
}

static struct file_operations dummy_ops = {
	.owner		= THIS_MODULE,
	.open		= dummy_open,
	.release	= dummy_release,
};

static int __init dummy_init(void)
{
	pr_info("dummy module init\n");
	return register_chrdev(MYMAJOR, "dummy", &dummy_ops);
}

static void __exit dummy_exit(void)
{
	pr_info("dummy module unloaded\n");
	unregister_chrdev(MYMAJOR, "dummy");
}

module_init(dummy_init);
module_exit(dummy_exit);

MODULE_LICENSE("GPL");