[SCSI] zfcp: fix queue, scheduled work processing.
Ensure the refcounting is correct even if we were not able to
schedule a work. In addition we have to make sure no scheduled
work is pending while we're dequeing the adapter from the
systems environment.
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index dee1cc3..631bdb1 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -857,7 +857,7 @@
port->erp_action.step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
if (retval)
zfcp_erp_notify(&port->erp_action, ZFCP_ERP_FAILED);
-
+ zfcp_port_put(port);
}
static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
@@ -873,7 +873,10 @@
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);
+ zfcp_port_get(port);
+ if (!queue_work(zfcp_data.work_queue,
+ &port->gid_pn_work))
+ zfcp_port_put(port);
return ZFCP_ERP_CONTINUES;
}
case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
@@ -1211,7 +1214,8 @@
atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
INIT_WORK(&p->work, zfcp_erp_scsi_scan);
p->unit = unit;
- queue_work(zfcp_data.work_queue, &p->work);
+ if (!queue_work(zfcp_data.work_queue, &p->work))
+ zfcp_unit_put(unit);
}
static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)