+static int
+zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action)
+{
+ int retval = ZFCP_ERP_SUCCEEDED;
+ int retries;
+ int sleep;
+ struct zfcp_adapter *adapter = erp_action->adapter;
+
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
+
+ for (retries = 0; ; retries++) {
+ ZFCP_LOG_DEBUG("Doing exchange port data\n");
+ zfcp_erp_action_to_running(erp_action);
+ zfcp_erp_timeout_init(erp_action);
+ if (zfcp_fsf_exchange_port_data(erp_action, adapter, NULL)) {
+ retval = ZFCP_ERP_FAILED;
+ debug_text_event(adapter->erp_dbf, 5, "a_fstx_xf");
+ ZFCP_LOG_INFO("error: initiation of exchange of "
+ "port data failed for adapter %s\n",
+ zfcp_get_busid_by_adapter(adapter));
+ break;
+ }
+ debug_text_event(adapter->erp_dbf, 6, "a_fstx_xok");
+ ZFCP_LOG_DEBUG("Xchange underway\n");
+
+ /*
+ * Why this works:
+ * Both the normal completion handler as well as the timeout
+ * handler will do an 'up' when the 'exchange port data'
+ * request completes or times out. Thus, the signal to go on
+ * won't be lost utilizing this semaphore.
+ * Furthermore, this 'adapter_reopen' action is
+ * guaranteed to be the only action being there (highest action
+ * which prevents other actions from being created).
+ * Resulting from that, the wake signal recognized here
+ * _must_ be the one belonging to the 'exchange port
+ * data' request.
+ */
+ down(&adapter->erp_ready_sem);
+ if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
+ ZFCP_LOG_INFO("error: exchange of port data "
+ "for adapter %s timed out\n",
+ zfcp_get_busid_by_adapter(adapter));
+ break;
+ }
+
+ if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
+ &adapter->status))
+ break;
+
+ ZFCP_LOG_DEBUG("host connection still initialising... "
+ "waiting and retrying...\n");
+ /* sleep a little bit before retry */
+ sleep = retries < ZFCP_EXCHANGE_PORT_DATA_SHORT_RETRIES ?
+ ZFCP_EXCHANGE_PORT_DATA_SHORT_SLEEP :
+ ZFCP_EXCHANGE_PORT_DATA_LONG_SLEEP;
+ msleep(jiffies_to_msecs(sleep));
+ }
+
+ if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
+ &adapter->status)) {
+ ZFCP_LOG_INFO("error: exchange of port data for "
+ "adapter %s failed\n",
+ zfcp_get_busid_by_adapter(adapter));
+ retval = ZFCP_ERP_FAILED;
+ }
+
+ return retval;
+}
+