1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/scsi/scsi_wait_scan.c b/drivers/scsi/scsi_wait_scan.c
new file mode 100644
index 00000000000..74708fcaf82
--- /dev/null
+++ b/drivers/scsi/scsi_wait_scan.c
@@ -0,0 +1,42 @@
+/*
+ * scsi_wait_scan.c
+ *
+ * Copyright (C) 2006 James Bottomley <James.Bottomley@SteelEye.com>
+ *
+ * This is a simple module to wait until all the async scans are
+ * complete.  The idea is to use it in initrd/initramfs scripts.  You
+ * modprobe it after all the modprobes of the root SCSI drivers and it
+ * will wait until they have all finished scanning their busses before
+ * allowing the boot to proceed
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <scsi/scsi_scan.h>
+
+static int __init wait_scan_init(void)
+{
+        /*
+         * First we need to wait for device probing to finish;
+         * the drivers we just loaded might just still be probing
+         * and might not yet have reached the scsi async scanning
+         */
+        wait_for_device_probe();
+        /*
+         * and then we wait for the actual asynchronous scsi scan
+         * to finish.
+         */
+        scsi_complete_async_scans();
+        return 0;
+}
+
+static void __exit wait_scan_exit(void)
+{
+}
+
+MODULE_DESCRIPTION("SCSI wait for scans");
+MODULE_AUTHOR("James Bottomley");
+MODULE_LICENSE("GPL");
+
+late_initcall(wait_scan_init);
+module_exit(wait_scan_exit);