[SCSI] zfcp: Remove some port flags

PORT_PHYS_CLOSING is only set and cleared, but not actually used
for status checking.

PORT_INVALID_WWPN is set when the GID_PN request does not return
a d_id for a remote port, e.g. when a remote port has been
unplugged. For this case, the d_id is zero. In the erp we can
check the d_id and use the normal escalation procedure that gives
up after three retries and remove the special case.

PORT_NO_WWPN is unused: Each port in the remote port list has a
valid wwpn. The WKA ports are now tracked outside the port
list. Remove the PORT_NO_WWPN flag, since this is no longer set
for any port.

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

5 files changed, 11 insertions, 32 deletions

diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 8af7dfbe022c..497986f6d643 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -249,8 +249,8 @@ struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter,
         struct zfcp_port *port;
 
         list_for_each_entry(port, &adapter->port_list_head, list)
-                if ((port->wwpn == wwpn) && !(atomic_read(&port->status) &
-                      (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE)))
+                if ((port->wwpn == wwpn) &&
+                    !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE))
                         return port;
         return NULL;
 }
@@ -620,11 +620,10 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn,
         dev_set_drvdata(&port->sysfs_device, port);
 
         read_lock_irq(&zfcp_data.config_lock);
-        if (!(status & ZFCP_STATUS_PORT_NO_WWPN))
-                if (zfcp_get_port_by_wwpn(adapter, wwpn)) {
-                        read_unlock_irq(&zfcp_data.config_lock);
-                        goto err_out_free;
-                }
+        if (zfcp_get_port_by_wwpn(adapter, wwpn)) {
+                read_unlock_irq(&zfcp_data.config_lock);
+                goto err_out_free;
+        }
         read_unlock_irq(&zfcp_data.config_lock);
 
         if (device_register(&port->sysfs_device))
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 510662783a6f..62f9ee58c9b8 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -243,9 +243,6 @@ struct zfcp_ls_adisc {
 
 /* remote port status */
 #define ZFCP_STATUS_PORT_PHYS_OPEN              0x00000001
-#define ZFCP_STATUS_PORT_PHYS_CLOSING           0x00000004
-#define ZFCP_STATUS_PORT_NO_WWPN                0x00000008
-#define ZFCP_STATUS_PORT_INVALID_WWPN           0x00000020
 
 /* well known address (WKA) port status*/
 enum zfcp_wka_status {
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 387a3af528ac..aed08e70aa96 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -777,10 +777,7 @@ static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act)
 
 static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)
 {
-        atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
-                          ZFCP_STATUS_PORT_PHYS_CLOSING |
-                          ZFCP_STATUS_PORT_INVALID_WWPN,
-                          &port->status);
+        atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status);
 }
 
 static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
@@ -875,13 +872,8 @@ static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
                         return ZFCP_ERP_CONTINUES;
                 }
         case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
-                if (!port->d_id) {
-                        if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) {
-                                zfcp_erp_port_failed(port, 26, NULL);
-                                return ZFCP_ERP_EXIT;
-                        }
+                if (!port->d_id)
                         return ZFCP_ERP_FAILED;
-                }
                 return zfcp_erp_port_strategy_open_port(act);
 
         case ZFCP_ERP_STEP_PORT_OPENING:
@@ -1269,10 +1261,6 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
 
         case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
         case ZFCP_ERP_ACTION_REOPEN_PORT:
-                if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) {
-                        zfcp_port_put(port);
-                        return;
-                }
                 if ((result == ZFCP_ERP_SUCCEEDED) && !port->rport)
                         zfcp_erp_rport_register(port);
                 if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) {
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index eabdfe24456e..67e6b7177870 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -259,10 +259,9 @@ static void zfcp_fc_ns_gid_pn_eval(unsigned long data)
 
         if (ct->status)
                 return;
-        if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) {
-                atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
+        if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT)
                 return;
-        }
+
         /* paranoia */
         if (ct_iu_req->wwpn != port->wwpn)
                 return;
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index babe1b8ba25e..638cd5a2919d 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -1712,7 +1712,7 @@ static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
         struct zfcp_unit *unit;
 
         if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
-                goto skip_fsfstatus;
+                return;
 
         switch (header->fsf_status) {
         case FSF_PORT_HANDLE_NOT_VALID:
@@ -1752,8 +1752,6 @@ static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
                                           &unit->status);
                 break;
         }
-skip_fsfstatus:
-        atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
 }
 
 /**
@@ -1789,8 +1787,6 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
         req->erp_action = erp_action;
         req->handler = zfcp_fsf_close_physical_port_handler;
         erp_action->fsf_req = req;
-        atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
-                        &erp_action->port->status);
 
         zfcp_fsf_start_erp_timer(req);
         retval = zfcp_fsf_req_send(req);