aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/s390/scsi/zfcp_fsf.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/scsi/zfcp_fsf.c')
-rw-r--r--drivers/s390/scsi/zfcp_fsf.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index cc69db3b71e7..9c3f91a343f3 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -647,14 +647,6 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
647 } 647 }
648} 648}
649 649
650static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
651{
652 if (atomic_read(&adapter->req_q.count) > 0)
653 return 1;
654 atomic_inc(&adapter->qdio_outb_full);
655 return 0;
656}
657
658static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter) 650static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
659 __releases(&adapter->req_q_lock) 651 __releases(&adapter->req_q_lock)
660 __acquires(&adapter->req_q_lock) 652 __acquires(&adapter->req_q_lock)
@@ -1177,8 +1169,8 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
1177 ZFCP_STATUS_COMMON_UNBLOCKED))) 1169 ZFCP_STATUS_COMMON_UNBLOCKED)))
1178 return -EBUSY; 1170 return -EBUSY;
1179 1171
1180 spin_lock(&adapter->req_q_lock); 1172 spin_lock_bh(&adapter->req_q_lock);
1181 if (!zfcp_fsf_sbal_available(adapter)) 1173 if (zfcp_fsf_req_sbal_get(adapter))
1182 goto out; 1174 goto out;
1183 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, 1175 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1184 ZFCP_REQ_AUTO_CLEANUP, NULL); 1176 ZFCP_REQ_AUTO_CLEANUP, NULL);
@@ -1211,7 +1203,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
1211failed_send: 1203failed_send:
1212 zfcp_fsf_req_free(req); 1204 zfcp_fsf_req_free(req);
1213out: 1205out:
1214 spin_unlock(&adapter->req_q_lock); 1206 spin_unlock_bh(&adapter->req_q_lock);
1215 return ret; 1207 return ret;
1216} 1208}
1217 1209
@@ -2324,8 +2316,10 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2324 return -EBUSY; 2316 return -EBUSY;
2325 2317
2326 spin_lock(&adapter->req_q_lock); 2318 spin_lock(&adapter->req_q_lock);
2327 if (!zfcp_fsf_sbal_available(adapter)) 2319 if (atomic_read(&adapter->req_q.count) <= 0) {
2320 atomic_inc(&adapter->qdio_outb_full);
2328 goto out; 2321 goto out;
2322 }
2329 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 2323 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2330 ZFCP_REQ_AUTO_CLEANUP, 2324 ZFCP_REQ_AUTO_CLEANUP,
2331 adapter->pool.fsf_req_scsi); 2325 adapter->pool.fsf_req_scsi);