static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
{
switch (result) {
case ZFCP_ERP_SUCCEEDED :
atomic_set(&port->erp_counter, 0);
zfcp_erp_port_unblock(port);
break;
case ZFCP_ERP_FAILED :
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) {
zfcp_erp_port_block(port, 0);
result = ZFCP_ERP_EXIT;
}
atomic_inc(&port->erp_counter);
if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) {
dev_err(&port->adapter->ccw_device->dev,
"ERP failed for remote port 0x%016Lx\n",
(unsigned long long)port->wwpn);
zfcp_erp_port_failed(port, "erpsck1", NULL);
}
break;
}
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
zfcp_erp_port_block(port, 0);
result = ZFCP_ERP_EXIT;
}
return result;
}
static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
if (port->wwpn != adapter->peer_wwpn) {
zfcp_erp_port_failed(port, "eroptp1", NULL);
return ZFCP_ERP_FAILED;
}
port->d_id = adapter->peer_d_id;
return zfcp_erp_port_strategy_open_port(act);
}
static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
if (port->wwpn != adapter->peer_wwpn) {
zfcp_erp_port_failed(port, 25, NULL);
return ZFCP_ERP_FAILED;
}
port->d_id = adapter->peer_d_id;
atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
return zfcp_erp_port_strategy_open_port(act);
}
static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id,
void *ref)
{
zfcp_erp_port_block(port, clear);
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
/* ensure propagation of failed status to new devices */
zfcp_erp_port_failed(port, 14, NULL);
return -EIO;
}
return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
port->adapter, port, NULL, id, ref);
}
static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
int p_status = atomic_read(&port->status);
switch (act->step) {
case ZFCP_ERP_STEP_UNINITIALIZED:
case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
case ZFCP_ERP_STEP_PORT_CLOSING:
if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
return zfcp_erp_open_ptp_port(act);
if (!port->d_id) {
queue_work(zfcp_data.work_queue, &port->gid_pn_work);
return ZFCP_ERP_CONTINUES;
}
case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
if (!port->d_id) {
if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) {
zfcp_erp_port_failed(port, 26, NULL);
return ZFCP_ERP_EXIT;
}
return ZFCP_ERP_FAILED;
}
return zfcp_erp_port_strategy_open_port(act);
case ZFCP_ERP_STEP_PORT_OPENING:
/* D_ID might have changed during open */
if (p_status & ZFCP_STATUS_COMMON_OPEN) {
if (port->d_id)
return ZFCP_ERP_SUCCEEDED;
else {
act->step = ZFCP_ERP_STEP_PORT_CLOSING;
return ZFCP_ERP_CONTINUES;
}
/* fall through otherwise */
}
}
return ZFCP_ERP_FAILED;
}