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/drivers/scsi/scsi_module.c

http://github.com/mirrors/linux
C | 73 lines | 51 code | 14 blank | 8 comment | 6 complexity | 1bbdcebc9265c20a5046d1164bcf6b33 MD5 | raw file
 1/*
 2 * Copyright (C) 2003 Christoph Hellwig.
 3 *	Released under GPL v2.
 4 *
 5 * Support for old-style host templates.
 6 *
 7 * NOTE:  Do not use this for new drivers ever.
 8 */
 9
10#include <linux/init.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13
14#include <scsi/scsi_host.h>
15
16
17static int __init init_this_scsi_driver(void)
18{
19	struct scsi_host_template *sht = &driver_template;
20	struct Scsi_Host *shost;
21	struct list_head *l;
22	int error;
23
24	if (!sht->release) {
25		printk(KERN_ERR
26		    "scsi HBA driver %s didn't set a release method.\n",
27		    sht->name);
28		return -EINVAL;
29	}
30
31	sht->module = THIS_MODULE;
32	INIT_LIST_HEAD(&sht->legacy_hosts);
33
34	sht->detect(sht);
35	if (list_empty(&sht->legacy_hosts))
36		return -ENODEV;
37
38	list_for_each_entry(shost, &sht->legacy_hosts, sht_legacy_list) {
39		error = scsi_add_host(shost, NULL);
40		if (error)
41			goto fail;
42		scsi_scan_host(shost);
43	}
44	return 0;
45 fail:
46	l = &shost->sht_legacy_list;
47	while ((l = l->prev) != &sht->legacy_hosts)
48		scsi_remove_host(list_entry(l, struct Scsi_Host, sht_legacy_list));
49	return error;
50}
51
52static void __exit exit_this_scsi_driver(void)
53{
54	struct scsi_host_template *sht = &driver_template;
55	struct Scsi_Host *shost, *s;
56
57	list_for_each_entry(shost, &sht->legacy_hosts, sht_legacy_list)
58		scsi_remove_host(shost);
59	list_for_each_entry_safe(shost, s, &sht->legacy_hosts, sht_legacy_list)
60		sht->release(shost);
61
62	if (list_empty(&sht->legacy_hosts))
63		return;
64
65	printk(KERN_WARNING "%s did not call scsi_unregister\n", sht->name);
66	dump_stack();
67
68	list_for_each_entry_safe(shost, s, &sht->legacy_hosts, sht_legacy_list)
69		scsi_unregister(shost);
70}
71
72module_init(init_this_scsi_driver);
73module_exit(exit_this_scsi_driver);