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.h"
  15 #include <scsi/scsi_host.h>
  16
  17
  18 static int __init init_this_scsi_driver(void)
  19 {
  20         struct scsi_host_template *sht = &driver_template;
  21         struct Scsi_Host *shost;
  22         struct list_head *l;
  23         int error;
  24
  25         if (!sht->release) {
  26                 printk(KERN_ERR
  27                     "scsi HBA driver %s didn't set a release method.\n",
  28                     sht->name);
  29                 return -EINVAL;
  30         }
  31
  32         sht->module = THIS_MODULE;
  33         INIT_LIST_HEAD(&sht->legacy_hosts);
  34
  35         sht->detect(sht);
  36         if (list_empty(&sht->legacy_hosts))
  37                 return -ENODEV;
  38
  39         list_for_each_entry(shost, &sht->legacy_hosts, sht_legacy_list) {
  40                 error = scsi_add_host(shost, NULL);
  41                 if (error)
  42                         goto fail;
  43                 scsi_scan_host(shost);
  44         }
  45         return 0;
  46  fail:
  47         l = &shost->sht_legacy_list;
  48         while ((l = l->prev) != &sht->legacy_hosts)
  49                 scsi_remove_host(list_entry(l, struct Scsi_Host, sht_legacy_list));
  50         return error;
  51 }
  52
  53 static void __exit exit_this_scsi_driver(void)
  54 {
  55         struct scsi_host_template *sht = &driver_template;
  56         struct Scsi_Host *shost, *s;
  57
  58         list_for_each_entry(shost, &sht->legacy_hosts, sht_legacy_list)
  59                 scsi_remove_host(shost);
  60         list_for_each_entry_safe(shost, s, &sht->legacy_hosts, sht_legacy_list)
  61                 sht->release(shost);
  62
  63         if (list_empty(&sht->legacy_hosts))
  64                 return;
  65
  66         printk(KERN_WARNING "%s did not call scsi_unregister\n", sht->name);
  67         dump_stack();
  68
  69         list_for_each_entry_safe(shost, s, &sht->legacy_hosts, sht_legacy_list)
  70                 scsi_unregister(shost);
  71 }
  72
  73 module_init(init_this_scsi_driver);
  74 module_exit(exit_this_scsi_driver);