diff options
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 6 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_ccw.c | 74 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 5 |
3 files changed, 54 insertions, 31 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index e8f39f02bc3..d1e75d36ed1 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -541,6 +541,9 @@ int zfcp_adapter_enqueue(struct ccw_device *ccw_device) rwlock_init(&adapter->erp_lock); rwlock_init(&adapter->abort_lock); + if (zfcp_erp_thread_setup(adapter)) + goto erp_thread_failed; + INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); INIT_WORK(&adapter->scan_work, _zfcp_fc_scan_ports_later); @@ -561,6 +564,8 @@ int zfcp_adapter_enqueue(struct ccw_device *ccw_device) return 0; sysfs_failed: + zfcp_erp_thread_kill(adapter); +erp_thread_failed: zfcp_fc_gs_destroy(adapter); generic_services_failed: zfcp_destroy_adapter_work_queue(adapter); @@ -602,6 +607,7 @@ void zfcp_adapter_dequeue(struct zfcp_adapter *adapter) return; zfcp_fc_gs_destroy(adapter); + zfcp_erp_thread_kill(adapter); zfcp_destroy_adapter_work_queue(adapter); zfcp_dbf_adapter_unregister(adapter->dbf); zfcp_free_low_mem_buffers(adapter); diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c index d9da5c42ccb..82ae6ed7ef8 100644 --- a/drivers/s390/scsi/zfcp_ccw.c +++ b/drivers/s390/scsi/zfcp_ccw.c @@ -18,6 +18,9 @@ static int zfcp_ccw_suspend(struct ccw_device *cdev) { struct zfcp_adapter *adapter = dev_get_drvdata(&cdev->dev); + if (!adapter) + return 0; + down(&zfcp_data.config_sema); zfcp_erp_adapter_shutdown(adapter, 0, "ccsusp1", NULL); @@ -33,6 +36,9 @@ static int zfcp_ccw_activate(struct ccw_device *cdev) { struct zfcp_adapter *adapter = dev_get_drvdata(&cdev->dev); + if (!adapter) + return 0; + zfcp_erp_modify_adapter_status(adapter, "ccresu1", NULL, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, @@ -63,25 +69,14 @@ int zfcp_ccw_priv_sch(struct zfcp_adapter *adapter) * zfcp_ccw_probe - probe function of zfcp driver * @ccw_device: pointer to belonging ccw device * - * This function gets called by the common i/o layer and sets up the initial - * data structures for each fcp adapter, which was detected by the system. - * Also the sysfs files for this adapter will be created by this function. - * In addition the nameserver port will be added to the ports of the adapter - * and its sysfs representation will be created too. + * This function gets called by the common i/o layer for each FCP + * device found on the current system. This is only a stub to make cio + * work: To only allocate adapter resources for devices actually used, + * the allocation is deferred to the first call to ccw_set_online. */ static int zfcp_ccw_probe(struct ccw_device *ccw_device) { - int retval = 0; - - down(&zfcp_data.config_sema); - if (zfcp_adapter_enqueue(ccw_device)) { - dev_err(&ccw_device->dev, - "Setting up data structures for the " - "FCP adapter failed\n"); - retval = -EINVAL; - } - up(&zfcp_data.config_sema); - return retval; + return 0; } /** @@ -102,8 +97,11 @@ static void zfcp_ccw_remove(struct ccw_device *ccw_device) LIST_HEAD(port_remove_lh); ccw_device_set_offline(ccw_device); + down(&zfcp_data.config_sema); adapter = dev_get_drvdata(&ccw_device->dev); + if (!adapter) + goto out; write_lock_irq(&zfcp_data.config_lock); list_for_each_entry_safe(port, p, &adapter->port_list_head, list) { @@ -129,6 +127,7 @@ static void zfcp_ccw_remove(struct ccw_device *ccw_device) wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); zfcp_adapter_dequeue(adapter); +out: up(&zfcp_data.config_sema); } @@ -136,22 +135,33 @@ static void zfcp_ccw_remove(struct ccw_device *ccw_device) * zfcp_ccw_set_online - set_online function of zfcp driver * @ccw_device: pointer to belonging ccw device * - * This function gets called by the common i/o layer and sets an adapter - * into state online. Setting an fcp device online means that it will be - * registered with the SCSI stack, that the QDIO queues will be set up - * and that the adapter will be opened (asynchronously). + * This function gets called by the common i/o layer and sets an + * adapter into state online. The first call will allocate all + * adapter resources that will be retained until the device is removed + * via zfcp_ccw_remove. + * + * Setting an fcp device online means that it will be registered with + * the SCSI stack, that the QDIO queues will be set up and that the + * adapter will be opened. */ static int zfcp_ccw_set_online(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; - int retval; + int ret = 0; down(&zfcp_data.config_sema); adapter = dev_get_drvdata(&ccw_device->dev); - retval = zfcp_erp_thread_setup(adapter); - if (retval) - goto out; + if (!adapter) { + ret = zfcp_adapter_enqueue(ccw_device); + if (ret) { + dev_err(&ccw_device->dev, + "Setting up data structures for the " + "FCP adapter failed\n"); + goto out; + } + adapter = dev_get_drvdata(&ccw_device->dev); + } /* initialize request counter */ BUG_ON(!zfcp_reqlist_isempty(adapter)); @@ -162,13 +172,11 @@ static int zfcp_ccw_set_online(struct ccw_device *ccw_device) zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, "ccsonl2", NULL); zfcp_erp_wait(adapter); +out: up(&zfcp_data.config_sema); - flush_work(&adapter->scan_work); - return 0; - - out: - up(&zfcp_data.config_sema); - return retval; + if (!ret) + flush_work(&adapter->scan_work); + return ret; } /** @@ -184,10 +192,13 @@ static int zfcp_ccw_set_offline(struct ccw_device *ccw_device) down(&zfcp_data.config_sema); adapter = dev_get_drvdata(&ccw_device->dev); + if (!adapter) + goto out; + zfcp_erp_adapter_shutdown(adapter, 0, "ccsoff1", NULL); zfcp_erp_wait(adapter); - zfcp_erp_thread_kill(adapter); up(&zfcp_data.config_sema); +out: return 0; } @@ -244,6 +255,7 @@ static void zfcp_ccw_shutdown(struct ccw_device *cdev) adapter = dev_get_drvdata(&cdev->dev); zfcp_erp_adapter_shutdown(adapter, 0, "ccshut1", NULL); zfcp_erp_wait(adapter); + zfcp_erp_thread_kill(adapter); up(&zfcp_data.config_sema); } diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 577e1570859..73d366ba31e 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -150,6 +150,9 @@ static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter, a_status = atomic_read(&adapter->status); if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE) return 0; + if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) && + !(a_status & ZFCP_STATUS_COMMON_OPEN)) + return 0; /* shutdown requested for closed adapter */ } return need; @@ -1349,6 +1352,8 @@ void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) { kthread_stop(adapter->erp_thread); adapter->erp_thread = NULL; + WARN_ON(!list_empty(&adapter->erp_ready_head)); + WARN_ON(!list_empty(&adapter->erp_running_head)); } /** |