linux/drivers/scsi/scsi_module.c
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   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);
  74
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