[SCSI] zfcp: fix: avoid race between fc_remote_port_add and scsi_add_device

Flush workqueue of a scsi host after a remote port for that host
is registered at the fc transport class. Otherwise immediate
registration of a scsi device on that host is racy.

Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 8ed6fcb41653a83dd12976408bbf06602ef666c8..e3c4bdd29a60805ee36c8d24b54966ab71c43b01 100644 (file)
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -3415,6 +3415,8 @@ zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
                                                "(adapter %s, wwpn=0x%016Lx)\n",
                                                zfcp_get_busid_by_port(port),
                                                port->wwpn);
+                       else
+                               scsi_flush_work(adapter->scsi_host);
                }
                zfcp_port_put(port);
                break;