[SCSI] zfcp: Simplify zfcp data structures

Reduce the size of zfcp data structures by removing unused and
redundant members. scsi_lun is only the mangled version of the
fcp_lun. So, remove the redundant field and use the fcp_lun instead.

Since the queue lock and the pci_batch indicator are only used in the
request queue, move them from the common queue struct to the adapter
struct.

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, 45 insertions, 44 deletions

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 02a570084d88..c10b88d235d2 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -639,12 +639,14 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
         }
 }
 
-static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue)
+static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
 {
-        spin_lock_bh(&queue->lock);
-        if (atomic_read(&queue->count))
+        struct zfcp_qdio_queue *req_q = &adapter->req_q;
+
+        spin_lock_bh(&adapter->req_q_lock);
+        if (atomic_read(&req_q->count))
                 return 1;
-        spin_unlock_bh(&queue->lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return 0;
 }
 
@@ -659,17 +661,16 @@ static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
 static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
 {
         long ret;
-        struct zfcp_qdio_queue *req_q = &adapter->req_q;
 
-        spin_unlock_bh(&req_q->lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         ret = wait_event_interruptible_timeout(adapter->request_wq,
-                                        zfcp_fsf_sbal_check(req_q), 5 * HZ);
+                                        zfcp_fsf_sbal_check(adapter), 5 * HZ);
         if (ret > 0)
                 return 0;
         if (!ret)
                 atomic_inc(&adapter->qdio_outb_full);
 
-        spin_lock_bh(&req_q->lock);
+        spin_lock_bh(&adapter->req_q_lock);
         return -EIO;
 }
 
@@ -811,7 +812,7 @@ int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
         struct qdio_buffer_element *sbale;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -851,7 +852,7 @@ failed_buf:
         zfcp_fsf_req_free(req);
         zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -924,7 +925,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
         struct qdio_buffer_element *sbale;
         struct zfcp_fsf_req *req = NULL;
 
-        spin_lock(&adapter->req_q.lock);
+        spin_lock(&adapter->req_q_lock);
         if (!zfcp_fsf_sbal_available(adapter))
                 goto out;
         req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
@@ -954,7 +955,7 @@ out_error_free:
         zfcp_fsf_req_free(req);
         req = NULL;
 out:
-        spin_unlock(&adapter->req_q.lock);
+        spin_unlock(&adapter->req_q_lock);
         return req;
 }
 
@@ -1043,7 +1044,7 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
         struct zfcp_fsf_req *req;
         int ret = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1085,7 +1086,7 @@ failed_send:
         if (erp_action)
                 erp_action->fsf_req = NULL;
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return ret;
 }
 
@@ -1155,7 +1156,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
                        ZFCP_STATUS_COMMON_UNBLOCKED)))
                 return -EBUSY;
 
-        spin_lock(&adapter->req_q.lock);
+        spin_lock(&adapter->req_q_lock);
         if (!zfcp_fsf_sbal_available(adapter))
                 goto out;
         req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
@@ -1189,7 +1190,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
 failed_send:
         zfcp_fsf_req_free(req);
 out:
-        spin_unlock(&adapter->req_q.lock);
+        spin_unlock(&adapter->req_q_lock);
         return ret;
 }
 
@@ -1200,7 +1201,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
         struct zfcp_adapter *adapter = erp_action->adapter;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (!zfcp_fsf_sbal_available(adapter))
                 goto out;
         req = zfcp_fsf_req_create(adapter,
@@ -1232,7 +1233,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
                 erp_action->fsf_req = NULL;
         }
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -1243,7 +1244,7 @@ int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
         struct zfcp_fsf_req *req = NULL;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1271,7 +1272,7 @@ int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
         retval = zfcp_fsf_req_send(req);
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         if (!retval)
                 wait_event(req->completion_wq,
                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
@@ -1296,7 +1297,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
                 return -EOPNOTSUPP;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (!zfcp_fsf_sbal_available(adapter))
                 goto out;
         req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
@@ -1322,7 +1323,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
                 erp_action->fsf_req = NULL;
         }
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -1342,7 +1343,7 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
         if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
                 return -EOPNOTSUPP;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (!zfcp_fsf_sbal_available(adapter))
                 goto out;
 
@@ -1364,7 +1365,7 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
         retval = zfcp_fsf_req_send(req);
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         if (!retval)
                 wait_event(req->completion_wq,
                            req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
@@ -1462,7 +1463,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
         struct zfcp_fsf_req *req;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1492,7 +1493,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
                 erp_action->fsf_req = NULL;
         }
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -1530,7 +1531,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
         struct zfcp_fsf_req *req;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1559,7 +1560,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
                 erp_action->fsf_req = NULL;
         }
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -1603,7 +1604,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
         struct zfcp_fsf_req *req;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1629,7 +1630,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
         if (retval)
                 zfcp_fsf_req_free(req);
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -1658,7 +1659,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
         struct zfcp_fsf_req *req;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1683,7 +1684,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
         if (retval)
                 zfcp_fsf_req_free(req);
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -1750,7 +1751,7 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
         struct zfcp_fsf_req *req;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1781,7 +1782,7 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
                 erp_action->fsf_req = NULL;
         }
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -1924,7 +1925,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
         struct zfcp_fsf_req *req;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -1957,7 +1958,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
                 erp_action->fsf_req = NULL;
         }
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -2010,7 +2011,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
         struct zfcp_fsf_req *req;
         int retval = -EIO;
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
         req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
@@ -2039,7 +2040,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
                 erp_action->fsf_req = NULL;
         }
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
         return retval;
 }
 
@@ -2281,7 +2282,7 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
                        ZFCP_STATUS_COMMON_UNBLOCKED)))
                 return -EBUSY;
 
-        spin_lock(&adapter->req_q.lock);
+        spin_lock(&adapter->req_q_lock);
         if (!zfcp_fsf_sbal_available(adapter))
                 goto out;
         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
@@ -2380,7 +2381,7 @@ failed_scsi_cmnd:
         zfcp_fsf_req_free(req);
         scsi_cmnd->host_scribble = NULL;
 out:
-        spin_unlock(&adapter->req_q.lock);
+        spin_unlock(&adapter->req_q_lock);
         return retval;
 }
 
@@ -2404,7 +2405,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
                        ZFCP_STATUS_COMMON_UNBLOCKED)))
                 return NULL;
 
-        spin_lock(&adapter->req_q.lock);
+        spin_lock(&adapter->req_q_lock);
         if (!zfcp_fsf_sbal_available(adapter))
                 goto out;
         req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
@@ -2437,7 +2438,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
         zfcp_fsf_req_free(req);
         req = NULL;
 out:
-        spin_unlock(&adapter->req_q.lock);
+        spin_unlock(&adapter->req_q_lock);
         return req;
 }
 
@@ -2475,7 +2476,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
                 return ERR_PTR(-EINVAL);
         }
 
-        spin_lock_bh(&adapter->req_q.lock);
+        spin_lock_bh(&adapter->req_q_lock);
         if (zfcp_fsf_req_sbal_get(adapter))
                 goto out;
 
@@ -2505,7 +2506,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
         zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
         retval = zfcp_fsf_req_send(req);
 out:
-        spin_unlock_bh(&adapter->req_q.lock);
+        spin_unlock_bh(&adapter->req_q_lock);
 
         if (!retval) {
                 wait_event(req->completion_wq,