[SCSI] zfcp: Wait for port scan to complete when setting adapter online

Attaching a unit immediately after setting the adapter online should
be possible. The problem right now is that the port_scan runs from a
workqueue and has not finished when the set_online call returns and
the sysfs structures for the ports are not available yet. Fix that by
waiting for the port scan to complete.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index b04038c74786..951a8d409d1d 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -116,7 +116,9 @@ static int zfcp_ccw_set_online(struct ccw_device *ccw_device)
         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 85,
                                 NULL);
         zfcp_erp_wait(adapter);
-        goto out;
+        up(&zfcp_data.config_sema);
+        flush_work(&adapter->scan_work);
+        return 0;
 
  out_scsi_register:
         zfcp_erp_thread_kill(adapter);