[SCSI] zfcp: Remove STATUS_COMMON_REMOVE flag as it is not required anymore

The flag ZFCP_STATUS_COMMON_REMOVE was used to indicate that a
resource is not ready to be used or about to be removed from the
system. This is now better done by an improved list handling
and therefore the additional indicator is not required anymore.

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@suse.de>

1 files changed, 7 insertions, 20 deletions

diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 12de1ce9a92d..6b94f8d0609c 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -245,9 +245,9 @@ struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port, u64 fcp_lun)
 
 	read_lock_irqsave(&port->unit_list_lock, flags);
 	list_for_each_entry(unit, &port->unit_list, list)
-		if ((unit->fcp_lun == fcp_lun) &&
-		    !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE)) {
-			get_device(&unit->sysfs_device);
+		if (unit->fcp_lun == fcp_lun) {
+			if (!get_device(&unit->sysfs_device))
+				unit = NULL;
 			read_unlock_irqrestore(&port->unit_list_lock, flags);
 			return unit;
 		}
@@ -270,9 +270,9 @@ struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter,
 
 	read_lock_irqsave(&adapter->port_list_lock, flags);
 	list_for_each_entry(port, &adapter->port_list, list)
-		if ((port->wwpn == wwpn) &&
-		    !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE)) {
-			get_device(&port->sysfs_device);
+		if (port->wwpn == wwpn) {
+			if (!get_device(&port->sysfs_device))
+				port = NULL;
 			read_unlock_irqrestore(&adapter->port_list_lock, flags);
 			return port;
 		}
@@ -334,9 +334,6 @@ struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun)
 	}
 	retval = -EINVAL;
 
-	/* mark unit unusable as long as sysfs registration is not complete */
-	atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
-
 	INIT_WORK(&unit->scsi_work, zfcp_scsi_scan);
 
 	spin_lock_init(&unit->latencies.lock);
@@ -360,7 +357,6 @@ struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun)
 	list_add_tail(&unit->list, &port->unit_list);
 	write_unlock_irq(&port->unit_list_lock);
 
-	atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
 	atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
 
 	return unit;
@@ -565,17 +561,12 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
 
 	adapter->service_level.seq_print = zfcp_print_sl;
 
-	/* mark adapter unusable as long as sysfs registration is not complete */
-	atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
-
 	dev_set_drvdata(&ccw_device->dev, adapter);
 
 	if (sysfs_create_group(&ccw_device->dev.kobj,
 			       &zfcp_sysfs_adapter_attrs))
 		goto failed;
 
-	atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
-
 	if (!zfcp_adapter_scsi_register(adapter))
 		return adapter;
 
@@ -692,9 +683,6 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn,
 	port->sysfs_device.parent = &adapter->ccw_device->dev;
 	port->sysfs_device.release = zfcp_port_release;
 
-	/* mark port unusable as long as sysfs registration is not complete */
-	atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status);
-
 	if (dev_set_name(&port->sysfs_device, "0x%016llx",
 			 (unsigned long long)wwpn)) {
 		kfree(port);
@@ -715,8 +703,7 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn,
 	list_add_tail(&port->list, &adapter->port_list);
 	write_unlock_irq(&adapter->port_list_lock);
 
-	atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
-	atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
+	atomic_set_mask(status | ZFCP_STATUS_COMMON_RUNNING, &port->status);
 
 	return port;