[SCSI] megaraid_sas: Fix FastPath I/O to work on degraded raid 1
[linux-2.6.git] / drivers / scsi / scsi_module.c
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
17 static 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
52 static 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
72 module_init(init_this_scsi_driver);
73 module_exit(exit_this_scsi_driver);