Showing error 1917

User: Jiri Slaby
Error type: Invalid Pointer Dereference
Error type description: A pointer which is invalid is being dereferenced
File location: drivers/s390/scsi/zfcp_fsf.c
Line in file: 1279
Project: Linux Kernel
Project version: 2.6.28
Tools: Cppcheck (1.59)
Entered: 2013-10-17 18:38:34 UTC

Source: 

1249        spin_lock_bh(&adapter->req_q_lock);
1250        if (zfcp_fsf_req_sbal_get(adapter))
1251                goto out;
1252
1253        req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1254                                  0, NULL);
1255        if (IS_ERR(req)) {
1256                retval = PTR_ERR(req);
1257                goto out;
1258        }
1259
1260        sbale = zfcp_qdio_sbale_req(req);
1261        sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1262        sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1263        req->handler = zfcp_fsf_exchange_config_data_handler;
1264
1265        req->qtcb->bottom.config.feature_selection =
1266                        FSF_FEATURE_CFDC |
1267                        FSF_FEATURE_LUN_SHARING |
1268                        FSF_FEATURE_NOTIFICATION_LOST |
1269                        FSF_FEATURE_UPDATE_ALERT;
1270
1271        if (data)
1272                req->data = data;
1273
1274        zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1275        retval = zfcp_fsf_req_send(req);
1276out:
1277        spin_unlock_bh(&adapter->req_q_lock);
1278        if (!retval)
1279                wait_event(req->completion_wq,
1280                           req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1281
1282        zfcp_fsf_req_free(req);
1283
1284        return retval;
1285}
1286
1287/**
1288 * zfcp_fsf_exchange_port_data - request information about local port
1289 * @erp_action: ERP action for the adapter for which port data is requested
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