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);