1/*
 2 * scsi_wait_scan.c
 3 *
 4 * Copyright (C) 2006 James Bottomley <James.Bottomley@SteelEye.com>
 5 *
 6 * This is a simple module to wait until all the async scans are
 7 * complete.  The idea is to use it in initrd/initramfs scripts.  You
 8 * modprobe it after all the modprobes of the root SCSI drivers and it
 9 * will wait until they have all finished scanning their busses before
10 * allowing the boot to proceed
11 */
12
13#include <linux/module.h>
14#include <linux/device.h>
15#include <scsi/scsi_scan.h>
16
17static int __init wait_scan_init(void)
18{
19	/*
20	 * First we need to wait for device probing to finish;
21	 * the drivers we just loaded might just still be probing
22	 * and might not yet have reached the scsi async scanning
23	 */
24	wait_for_device_probe();
25	/*
26	 * and then we wait for the actual asynchronous scsi scan
27	 * to finish.
28	 */
29	scsi_complete_async_scans();
30	return 0;
31}
32
33static void __exit wait_scan_exit(void)
34{
35}
36
37MODULE_DESCRIPTION("SCSI wait for scans");
38MODULE_AUTHOR("James Bottomley");
39MODULE_LICENSE("GPL");
40
41late_initcall(wait_scan_init);
42module_exit(wait_scan_exit);