[SCSI] zfcp: remove DID_DID flag

The port flag DID_DID indicates whether we know the current id of the
port. This is always set in parallel. Since the id 0 is invalid
(because the port id 0 is invalid) we can remove the DID_DID flag:
d_id of 0 indicates an invalid d_id != 0 is a valid one.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Acked-by: Felix Beck <felix@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

4 files changed, 4 insertions, 9 deletions

diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 4f3b7a5ce7fe..abc44086d470 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -244,7 +244,6 @@ struct zfcp_ls_adisc {
 
 /* remote port status */
 #define ZFCP_STATUS_PORT_PHYS_OPEN              0x00000001
-#define ZFCP_STATUS_PORT_DID_DID                0x00000002
 #define ZFCP_STATUS_PORT_PHYS_CLOSING           0x00000004
 #define ZFCP_STATUS_PORT_NO_WWPN                0x00000008
 #define ZFCP_STATUS_PORT_INVALID_WWPN           0x00000020
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 495a4a33e37d..387a3af528ac 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -840,7 +840,6 @@ static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
                 return ZFCP_ERP_FAILED;
         }
         port->d_id = adapter->peer_d_id;
-        atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
         return zfcp_erp_port_strategy_open_port(act);
 }
 
@@ -871,12 +870,12 @@ static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
         case ZFCP_ERP_STEP_PORT_CLOSING:
                 if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
                         return zfcp_erp_open_ptp_port(act);
-                if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) {
+                if (!port->d_id) {
                         queue_work(zfcp_data.work_queue, &port->gid_pn_work);
                         return ZFCP_ERP_CONTINUES;
                 }
         case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
-                if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) {
+                if (!port->d_id) {
                         if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) {
                                 zfcp_erp_port_failed(port, 26, NULL);
                                 return ZFCP_ERP_EXIT;
@@ -888,7 +887,7 @@ static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
         case ZFCP_ERP_STEP_PORT_OPENING:
                 /* D_ID might have changed during open */
                 if (p_status & ZFCP_STATUS_COMMON_OPEN) {
-                        if (p_status & ZFCP_STATUS_PORT_DID_DID)
+                        if (port->d_id)
                                 return ZFCP_ERP_SUCCEEDED;
                         else {
                                 act->step = ZFCP_ERP_STEP_PORT_CLOSING;
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index 396f05ed912f..217c3b04fd01 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -265,7 +265,6 @@ static void zfcp_fc_ns_gid_pn_eval(unsigned long data)
                 return;
         /* looks like a valid d_id */
         port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
-        atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
 }
 
 int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action,
@@ -588,7 +587,6 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
                 }
 
                 port = zfcp_port_enqueue(adapter, acc->wwpn,
-                                         ZFCP_STATUS_PORT_DID_DID |
                                          ZFCP_STATUS_COMMON_NOESC, d_id);
                 if (IS_ERR(port))
                         ret = PTR_ERR(port);
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 878b8f86ddc7..17620ecda335 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -1442,8 +1442,7 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
                 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
                 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
                         if (plogi->serv_param.wwpn != port->wwpn)
-                                atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
-                                                  &port->status);
+                                port->d_id = 0;
                         else {
                                 port->wwnn = plogi->serv_param.wwnn;
                                 zfcp_fc_plogi_evaluate(port, plogi);