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[SCSI] zfcp: Decouple gid_pn requests from erp

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Don't let the erp wait for gid_pn requests to complete. Instead, queue
the gid_pn work, exit erp and let the finished gid_pn work trigger a
new port reopen.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Christof Schmitt
2009-08-18 15:43:20 +02:00
committed by James Bottomley
parent 564e1c86c8
commit 799b76d09a
6 changed files with 47 additions and 56 deletions
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28
drivers/s390/scsi/zfcp_erp.c
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@@ -26,7 +26,6 @@ enum zfcp_erp_steps {
ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001,
ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010,
ZFCP_ERP_STEP_PORT_CLOSING = 0x0100,
ZFCP_ERP_STEP_NAMESERVER_LOOKUP = 0x0400,
ZFCP_ERP_STEP_PORT_OPENING = 0x0800,
ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000,
ZFCP_ERP_STEP_UNIT_OPENING = 0x2000,
@@ -842,27 +841,6 @@ static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
return zfcp_erp_port_strategy_open_port(act);
}
void zfcp_erp_port_strategy_open_lookup(struct work_struct *work)
{
int retval;
struct zfcp_port *port = container_of(work, struct zfcp_port,
gid_pn_work);
retval = zfcp_fc_ns_gid_pn(&port->erp_action);
if (!retval) {
port->erp_action.step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
goto out;
}
if (retval == -ENOMEM) {
zfcp_erp_notify(&port->erp_action, ZFCP_STATUS_ERP_LOWMEM);
goto out;
}
/* all other error condtions */
zfcp_erp_notify(&port->erp_action, 0);
out:
zfcp_port_put(port);
}
static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
@@ -880,12 +858,8 @@ static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
if (!queue_work(adapter->work_queue,
&port->gid_pn_work))
zfcp_port_put(port);
return ZFCP_ERP_CONTINUES;
return ZFCP_ERP_EXIT;
}
/* fall through */
case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
if (!port->d_id)
return ZFCP_ERP_FAILED;
return zfcp_erp_port_strategy_open_port(act);
case ZFCP_ERP_STEP_PORT_OPENING: