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Commit 2f8f3ed5 authored by Andreas Herrmann's avatar Andreas Herrmann Committed by
Browse files

[SCSI] zfcp: fix adapter erp when link is unplugged 



Remove endless polling for replug of the local link. Just wait for
link up notification.

Signed-off-by: default avatarAndreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent c8024eb5

drivers/s390/scsi/zfcp_def.h

+0 −5
Original line number Diff line number Diff line
@@ -152,11 +152,6 @@ typedef u32 scsi_lun_t; 
#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP	100

#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES	7



/* Retry 5 times every 2 second, then every minute */

#define ZFCP_EXCHANGE_PORT_DATA_SHORT_RETRIES	5

#define ZFCP_EXCHANGE_PORT_DATA_SHORT_SLEEP	200

#define ZFCP_EXCHANGE_PORT_DATA_LONG_SLEEP	6000



/* timeout value for "default timer" for fsf requests */

#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ);

drivers/s390/scsi/zfcp_erp.c

+28 −52
Original line number Diff line number Diff line
@@ -2246,15 +2246,6 @@ zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) 
{

	int retval;



	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;

	}



	retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action);

	if (retval == ZFCP_ERP_FAILED)

		return ZFCP_ERP_FAILED;
@@ -2266,13 +2257,6 @@ zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) 
	return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action);

}



/*

 * function:	

 *

 * purpose:	

 *

 * returns:

 */

static int

zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action)

{
@@ -2350,17 +2334,15 @@ static int 
zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action)

{

	int ret;

	int retries;

	int sleep;

	struct zfcp_adapter *adapter = erp_action->adapter;

	struct zfcp_adapter *adapter;



	adapter = erp_action->adapter;

	atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);



	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);

	ret = zfcp_fsf_exchange_port_data(erp_action, adapter, NULL);

	if (ret == -EOPNOTSUPP) {
@@ -2372,26 +2354,20 @@ zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action) 
	}

	debug_text_event(adapter->erp_dbf, 6, "a_xport_ok");



	ret = ZFCP_ERP_SUCCEEDED;

	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;

		ZFCP_LOG_INFO("error: exchange port data timed out (adapter "

			      "%s)\n", zfcp_get_busid_by_adapter(adapter));

		ret = ZFCP_ERP_FAILED;

	}

	if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status)) {

		ZFCP_LOG_INFO("error: exchange port data failed (adapter "

			      "%s\n", zfcp_get_busid_by_adapter(adapter));

		ret = ZFCP_ERP_FAILED;

	}

		if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,

				      &adapter->status))

			break;



		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);



	return ZFCP_ERP_SUCCEEDED;

	return ret;

}



/*

drivers/s390/scsi/zfcp_fsf.c

+41 −33
Original line number Diff line number Diff line
@@ -388,6 +388,7 @@ zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) 
	case FSF_PROT_LINK_DOWN:

		zfcp_fsf_link_down_info_eval(adapter,

					     &prot_status_qual->link_down_info);

		zfcp_erp_adapter_reopen(adapter, 0);

		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;

		break;
@@ -558,10 +559,8 @@ zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter, 


	atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);



	if (link_down == NULL) {

		zfcp_erp_adapter_reopen(adapter, 0);

		return;

	}

	if (link_down == NULL)

		goto out;



	switch (link_down->error_code) {

	case FSF_PSQ_LINK_NO_LIGHT:
@@ -643,17 +642,9 @@ zfcp_fsf_link_down_info_eval(struct zfcp_adapter *adapter, 
				link_down->explanation_code,

				link_down->vendor_specific_code);



	switch (link_down->error_code) {

	case FSF_PSQ_LINK_NO_LIGHT:

	case FSF_PSQ_LINK_WRAP_PLUG:

	case FSF_PSQ_LINK_NO_FCP:

	case FSF_PSQ_LINK_FIRMWARE_UPDATE:

		zfcp_erp_adapter_reopen(adapter, 0);

		break;

	default:

 out:

	zfcp_erp_adapter_failed(adapter);

}

}



/*

 * function:	zfcp_fsf_req_dispatch
@@ -2304,46 +2295,63 @@ zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action, 
	return retval;

}





/**

 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request

 * @fsf_req: pointer to struct zfcp_fsf_req

 * zfcp_fsf_exchange_port_evaluate

 * @fsf_req: fsf_req which belongs to xchg port data request

 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)

 */

static void

zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)

zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)

{

	struct zfcp_adapter *adapter = fsf_req->adapter;

	struct Scsi_Host *shost = adapter->scsi_host;

	struct fsf_qtcb *qtcb = fsf_req->qtcb;

	struct zfcp_adapter *adapter;

	struct fsf_qtcb *qtcb;

	struct fsf_qtcb_bottom_port *bottom, *data;

	struct Scsi_Host *shost;



	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)

		return;



	switch (qtcb->header.fsf_status) {

        case FSF_GOOD:

		atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);



	adapter = fsf_req->adapter;

	qtcb = fsf_req->qtcb;

	bottom = &qtcb->bottom.port;

	shost = adapter->scsi_host;



	data = (struct fsf_qtcb_bottom_port*) fsf_req->data;

	if (data)

		memcpy(data, bottom, sizeof(struct fsf_qtcb_bottom_port));



	if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)

		fc_host_permanent_port_name(shost) = bottom->wwpn;

	else

			fc_host_permanent_port_name(shost) =

				fc_host_port_name(shost);

		fc_host_permanent_port_name(shost) = fc_host_port_name(shost);

	fc_host_maxframe_size(shost) = bottom->maximum_frame_size;

	fc_host_supported_speeds(shost) = bottom->supported_speed;

		break;

}



/**

 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request

 * @fsf_req: pointer to struct zfcp_fsf_req

 */

static void

zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)

{

	struct zfcp_adapter *adapter;

	struct fsf_qtcb *qtcb;



	adapter = fsf_req->adapter;

	qtcb = fsf_req->qtcb;



	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)

		return;



	switch (qtcb->header.fsf_status) {

        case FSF_GOOD:

		zfcp_fsf_exchange_port_evaluate(fsf_req, 1);

		atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);

		break;

	case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:

		zfcp_fsf_exchange_port_evaluate(fsf_req, 0);

		atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);



		zfcp_fsf_link_down_info_eval(adapter,

			&qtcb->header.fsf_status_qual.link_down_info);

                break;



        default:

		debug_text_event(adapter->erp_dbf, 0, "xchg-port-ng");

		debug_event(adapter->erp_dbf, 0,