[SCSI] scsi_transport_fc: Introduce disable_target_scan flag

This change has already been discussed on linux-scsi:
http://marc.info/?t=118771096400003
http://marc.info/?t=118760913100005

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Acked-by: James Smart <James.Smart@Emulex.Com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 47057254850d..dd97f2652508 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -2988,10 +2988,12 @@ fc_scsi_scan_rport(struct work_struct *work)
         struct fc_rport *rport =
                 container_of(work, struct fc_rport, scan_work);
         struct Scsi_Host *shost = rport_to_shost(rport);
+        struct fc_internal *i = to_fc_internal(shost->transportt);
         unsigned long flags;
 
         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
-            (rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
+            (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
+            !(i->f->disable_target_scan)) {
                 scsi_scan_target(&rport->dev, rport->channel,
                         rport->scsi_target_id, SCAN_WILD_CARD, 1);
         }
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index a0d80bcaa93d..616a96a3ab81 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -632,6 +632,8 @@ struct fc_function_template {
         unsigned long   show_host_fabric_name:1;
         unsigned long   show_host_symbolic_name:1;
         unsigned long   show_host_system_hostname:1;
+
+        unsigned long   disable_target_scan:1;
 };