[SCSI] zfcp: fix adapter initialization
Fixed various problems in opening sequence of adapters which was previously
changed with NPIV support:
o corrected handling when exchange port data function is not supported,
otherwise adapters on z900 cannot be opened anymore
o corrected setup of timer for exchange port data if called from error
recovery
o corrected check of return code of exchange config data
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 8d503d9..ee7314d 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -2243,29 +2243,26 @@
return retval;
}
-/*
- * function: zfcp_fsf_init
- *
- * purpose: initializes FSF operation for the specified adapter
- *
- * returns: 0 - succesful initialization of FSF operation
- * !0 - failed to initialize FSF operation
- */
static int
zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action)
{
- int xconfig, xport;
+ int retval;
- if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
- &erp_action->adapter->status)) {
+ if ((atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
+ &erp_action->adapter->status)) &&
+ (erp_action->adapter->adapter_features &
+ FSF_FEATURE_HBAAPI_MANAGEMENT)) {
zfcp_erp_adapter_strategy_open_fsf_xport(erp_action);
atomic_set(&erp_action->adapter->erp_counter, 0);
return ZFCP_ERP_FAILED;
}
- xconfig = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action);
- xport = zfcp_erp_adapter_strategy_open_fsf_xport(erp_action);
- if ((xconfig == ZFCP_ERP_FAILED) || (xport == ZFCP_ERP_FAILED))
+ retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action);
+ if (retval == ZFCP_ERP_FAILED)
+ return ZFCP_ERP_FAILED;
+
+ retval = zfcp_erp_adapter_strategy_open_fsf_xport(erp_action);
+ if (retval == ZFCP_ERP_FAILED)
return ZFCP_ERP_FAILED;
return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action);
@@ -2354,41 +2351,29 @@
static int
zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action)
{
- int retval = ZFCP_ERP_SUCCEEDED;
+ int ret;
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");
+ retries = 0;
+ do {
+ write_lock(&adapter->erp_lock);
zfcp_erp_action_to_running(erp_action);
+ write_unlock(&adapter->erp_lock);
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;
+ ret = zfcp_fsf_exchange_port_data(erp_action, adapter, NULL);
+ if (ret == -EOPNOTSUPP) {
+ debug_text_event(adapter->erp_dbf, 3, "a_xport_notsupp");
+ return ZFCP_ERP_SUCCEEDED;
+ } else if (ret) {
+ debug_text_event(adapter->erp_dbf, 3, "a_xport_failed");
+ return ZFCP_ERP_FAILED;
}
- debug_text_event(adapter->erp_dbf, 6, "a_fstx_xok");
- ZFCP_LOG_DEBUG("Xchange underway\n");
+ debug_text_event(adapter->erp_dbf, 6, "a_xport_ok");
- /*
- * 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 "
@@ -2396,29 +2381,19 @@
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 (retries < ZFCP_EXCHANGE_PORT_DATA_SHORT_RETRIES) {
+ sleep = ZFCP_EXCHANGE_PORT_DATA_SHORT_SLEEP;
+ retries++;
+ } else
+ sleep = ZFCP_EXCHANGE_PORT_DATA_LONG_SLEEP;
+ schedule_timeout(sleep);
+ } while (1);
- 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;
+ return ZFCP_ERP_SUCCEEDED;
}
/*