linux启动之scsi和ata的初始化

static int __init init_scsi(void)

{

int error;

error = scsi_init_queue();

if (error)

return error;

error = scsi_init_procfs();

if (error)

goto cleanup_queue;

error = scsi_init_devinfo();

if (error)

goto cleanup_procfs;

error = scsi_init_hosts();

if (error)

goto cleanup_devlist;

error = scsi_init_sysctl();

if (error)

goto cleanup_hosts;

error = scsi_sysfs_register();

if (error)

goto cleanup_sysctl;

scsi_netlink_init();

printk(KERN_NOTICE "SCSI subsystem initialized\n");

return 0;

cleanup_sysctl:

scsi_exit_sysctl();

cleanup_hosts:

scsi_exit_hosts();

cleanup_devlist:

scsi_exit_devinfo();

cleanup_procfs:

scsi_exit_procfs();

cleanup_queue:

scsi_exit_queue();

printk(KERN_ERR "SCSI subsystem failed to initialize, error = %d\n",

-error);

return error;

}

[    0.260628] SCSI subsystem initialized

[    0.260660] libata version 3.00 loaded.

ata/libata-core.c

static int __init ata_init(void)

{

int rc;

ata_parse_force_param();

rc = ata_sff_init();

if (rc) {

kfree(ata_force_tbl);

return rc;

}

libata_transport_init();

ata_scsi_transport_template = ata_attach_transport();

if (!ata_scsi_transport_template) {

ata_sff_exit();

rc = -ENOMEM;

goto err_out;

}

printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");

return 0;

err_out:

return rc;

}