diff options
-rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 27 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_ccw.c | 7 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 1 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 6 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_fc.c | 1 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_sysfs.c | 70 |
6 files changed, 34 insertions, 78 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 12de1ce9a92..6b94f8d0609 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; diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c index 4d35902a0cc..c22cb72a5ae 100644 --- a/drivers/s390/scsi/zfcp_ccw.c +++ b/drivers/s390/scsi/zfcp_ccw.c @@ -113,16 +113,11 @@ static void zfcp_ccw_remove(struct ccw_device *cdev) write_lock_irq(&adapter->port_list_lock); list_for_each_entry_safe(port, p, &adapter->port_list, list) { write_lock(&port->unit_list_lock); - list_for_each_entry_safe(unit, u, &port->unit_list, list) { - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, - &unit->status); + list_for_each_entry_safe(unit, u, &port->unit_list, list) list_move(&unit->list, &unit_remove_lh); - } write_unlock(&port->unit_list_lock); - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); list_move(&port->list, &port_remove_lh); } - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); write_unlock_irq(&adapter->port_list_lock); zfcp_ccw_adapter_put(adapter); /* put from zfcp_ccw_adapter_by_cdev */ diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 7e84e1624d1..08fa31302f7 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -205,7 +205,6 @@ struct zfcp_ls_adisc { #define ZFCP_COMMON_FLAGS 0xfff00000 /* common status bits */ -#define ZFCP_STATUS_COMMON_REMOVE 0x80000000 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 788fd3a4cd2..3454c2a3b6b 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -174,7 +174,8 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, switch (need) { case ZFCP_ERP_ACTION_REOPEN_UNIT: - get_device(&unit->sysfs_device); + if (!get_device(&unit->sysfs_device)) + return NULL; atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); erp_action = &unit->erp_action; if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING)) @@ -183,7 +184,8 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, case ZFCP_ERP_ACTION_REOPEN_PORT: case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: - get_device(&port->sysfs_device); + if (!get_device(&port->sysfs_device)) + return NULL; zfcp_erp_action_dismiss_port(port); atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); erp_action = &port->erp_action; diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c index 3e3e72cc724..9252b65a13a 100644 --- a/drivers/s390/scsi/zfcp_fc.c +++ b/drivers/s390/scsi/zfcp_fc.c @@ -589,7 +589,6 @@ static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) !list_empty(&port->unit_list)) return; - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); list_move_tail(&port->list, lh); } diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 901cc9a6ed2..35e920b4fd8 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -104,10 +104,8 @@ static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \ unsigned long val; \ int retval = 0; \ \ - if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) { \ - retval = -EBUSY; \ - goto out; \ - } \ + if (!(_feat && get_device(&_feat->sysfs_device))) \ + return -EBUSY; \ \ if (strict_strtoul(buf, 0, &val) || val != 0) { \ retval = -EINVAL; \ @@ -120,6 +118,7 @@ static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \ _reopen_id, NULL); \ zfcp_erp_wait(_adapter); \ out: \ + put_device(&_feat->sysfs_device); \ return retval ? retval : (ssize_t) count; \ } \ static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO, \ @@ -161,11 +160,6 @@ static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev, if (!adapter) return -ENODEV; - if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) { - retval = -EBUSY; - goto out; - } - if (strict_strtoul(buf, 0, &val) || val != 0) { retval = -EINVAL; goto out; @@ -195,14 +189,9 @@ static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev, if (!adapter) return -ENODEV; - if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) { - ret = -EBUSY; - goto out; - } - ret = zfcp_fc_scan_ports(adapter); -out: zfcp_ccw_adapter_put(adapter); + return ret ? ret : (ssize_t) count; } static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL, @@ -216,28 +205,19 @@ static ssize_t zfcp_sysfs_port_remove_store(struct device *dev, struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev); struct zfcp_port *port; u64 wwpn; - int retval = 0; + int retval = -EINVAL; if (!adapter) return -ENODEV; - if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) { - retval = -EBUSY; + if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) goto out; - } - - if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) { - retval = -EINVAL; - goto out; - } port = zfcp_get_port_by_wwpn(adapter, wwpn); - if (!port) { - retval = -ENXIO; + if (!port) goto out; - } - - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); + else + retval = 0; write_lock_irq(&adapter->port_list_lock); list_del(&port->list); @@ -283,10 +263,8 @@ static ssize_t zfcp_sysfs_unit_add_store(struct device *dev, u64 fcp_lun; int retval = -EINVAL; - if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { - retval = -EBUSY; - goto out; - } + if (!(port && get_device(&port->sysfs_device))) + return -EBUSY; if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) goto out; @@ -294,13 +272,14 @@ static ssize_t zfcp_sysfs_unit_add_store(struct device *dev, unit = zfcp_unit_enqueue(port, fcp_lun); if (IS_ERR(unit)) goto out; - - retval = 0; + else + retval = 0; zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL); zfcp_erp_wait(unit->port->adapter); flush_work(&unit->scsi_work); out: + put_device(&port->sysfs_device); return retval ? retval : (ssize_t) count; } static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store); @@ -313,29 +292,23 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev, sysfs_device); struct zfcp_unit *unit; u64 fcp_lun; - int retval = 0; + int retval = -EINVAL; - if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { - retval = -EBUSY; - goto out; - } + if (!(port && get_device(&port->sysfs_device))) + return -EBUSY; - if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) { - retval = -EINVAL; + if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) goto out; - } unit = zfcp_get_unit_by_lun(port, fcp_lun); - if (!unit) { - retval = -EINVAL; + if (!unit) goto out; - } + else + retval = 0; /* wait for possible timeout during SCSI probe */ flush_work(&unit->scsi_work); - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); - write_lock_irq(&port->unit_list_lock); list_del(&unit->list); write_unlock_irq(&port->unit_list_lock); @@ -345,6 +318,7 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev, zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL); zfcp_device_unregister(&unit->sysfs_device, &zfcp_sysfs_unit_attrs); out: + put_device(&port->sysfs_device); return retval ? retval : (ssize_t) count; } static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store); |