[SCSI] fix async probe regression

Commit a7a20d1 "[SCSI] sd: limit the scope of the async probe domain"
moved sd probe work out of reach of wait_for_device_probe().  Allow it
to be synced via scsi_complete_async_scans().

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 01b03744f1f9..2e5fe584aad3 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -147,7 +147,7 @@ int scsi_complete_async_scans(void)
 
         do {
                 if (list_empty(&scanning_hosts))
-                        return 0;
+                        goto out;
                 /* If we can't get memory immediately, that's OK.  Just
                  * sleep a little.  Even if we never get memory, the async
                  * scans will finish eventually.
@@ -179,8 +179,11 @@ int scsi_complete_async_scans(void)
         }
  done:
         spin_unlock(&async_scan_lock);
-
         kfree(data);
+
+ out:
+        async_synchronize_full_domain(&scsi_sd_probe_domain);
+
         return 0;
 }