4 files changed, 13 insertions, 2 deletions

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index f17c3266a0e0..742cbe6b042b 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -179,6 +179,7 @@ void wait_for_device_probe(void)
         wait_event(probe_waitqueue, atomic_read(&probe_count) == 0);
         async_synchronize_full();
 }
+EXPORT_SYMBOL_GPL(wait_for_device_probe);
 
 /**
  * driver_probe_device - attempt to bind device & driver together
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index a14d245a66b8..6f51ca485f35 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -180,8 +180,6 @@ int scsi_complete_async_scans(void)
         spin_unlock(&async_scan_lock);
 
         kfree(data);
-        /* Synchronize async operations globally */
-        async_synchronize_full();
         return 0;
 }
 
diff --git a/drivers/scsi/scsi_wait_scan.c b/drivers/scsi/scsi_wait_scan.c
index 2f21af21269a..74708fcaf82f 100644
--- a/drivers/scsi/scsi_wait_scan.c
+++ b/drivers/scsi/scsi_wait_scan.c
@@ -11,10 +11,21 @@
  */
 
 #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;
 }
diff --git a/include/linux/device.h b/include/linux/device.h
index 2918c0e8fdfd..6a69caaac18a 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -551,6 +551,7 @@ extern int (*platform_notify_remove)(struct device *dev);
 extern struct device *get_device(struct device *dev);
 extern void put_device(struct device *dev);
 
+extern void wait_for_device_probe(void);
 
 /* drivers/base/power/shutdown.c */
 extern void device_shutdown(void);