[SCSI] zfcp: Remove adapter list
After the latest changes, the list of FCP devices is only used to lookup the adapter for requests from the actcli tool. Change this to use the lookup function in the cio layer. Now we can remove the adapter list and have one place less to use the global config_lock. Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Acked-by: Felix Beck <felix@linux.vnet.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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3 changed files with 3 additions and 28 deletions
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@ -181,7 +181,6 @@ static int __init zfcp_module_init(void)
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zfcp_data.work_queue = create_singlethread_workqueue("zfcp_wq");
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INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
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sema_init(&zfcp_data.config_sema, 1);
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rwlock_init(&zfcp_data.config_lock);
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@ -527,11 +526,7 @@ int zfcp_adapter_enqueue(struct ccw_device *ccw_device)
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&zfcp_sysfs_adapter_attrs))
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goto sysfs_failed;
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write_lock_irq(&zfcp_data.config_lock);
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atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
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list_add_tail(&adapter->list, &zfcp_data.adapter_list_head);
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write_unlock_irq(&zfcp_data.config_lock);
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zfcp_fc_nameserver_init(adapter);
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if (!zfcp_adapter_scsi_register(adapter))
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@ -574,14 +569,7 @@ void zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
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return;
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zfcp_adapter_debug_unregister(adapter);
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/* remove specified adapter data structure from list */
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write_lock_irq(&zfcp_data.config_lock);
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list_del(&adapter->list);
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write_unlock_irq(&zfcp_data.config_lock);
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zfcp_qdio_free(adapter);
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zfcp_free_low_mem_buffers(adapter);
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kfree(adapter->req_list);
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kfree(adapter->fc_stats);
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@ -85,20 +85,9 @@ static int zfcp_cfdc_copy_to_user(void __user *user_buffer,
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static struct zfcp_adapter *zfcp_cfdc_get_adapter(u32 devno)
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{
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struct zfcp_adapter *adapter = NULL, *cur_adapter;
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struct ccw_dev_id dev_id;
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read_lock_irq(&zfcp_data.config_lock);
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list_for_each_entry(cur_adapter, &zfcp_data.adapter_list_head, list) {
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ccw_device_get_id(cur_adapter->ccw_device, &dev_id);
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if (dev_id.devno == devno) {
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adapter = cur_adapter;
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zfcp_adapter_get(adapter);
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break;
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}
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}
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read_unlock_irq(&zfcp_data.config_lock);
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return adapter;
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char busid[9];
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snprintf(busid, sizeof(busid), "0.0.%04x", devno);
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return zfcp_get_adapter_by_busid(busid);
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}
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static int zfcp_cfdc_set_fsf(struct zfcp_fsf_cfdc *fsf_cfdc, int command)
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@ -451,7 +451,6 @@ struct zfcp_latencies {
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};
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struct zfcp_adapter {
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struct list_head list; /* list of adapters */
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atomic_t refcount; /* reference count */
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wait_queue_head_t remove_wq; /* can be used to wait for
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refcount drop to zero */
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@ -593,7 +592,6 @@ struct zfcp_fsf_req {
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struct zfcp_data {
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struct scsi_host_template scsi_host_template;
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struct scsi_transport_template *scsi_transport_template;
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struct list_head adapter_list_head; /* head of adapter list */
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rwlock_t config_lock; /* serialises changes
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to adapter/port/unit
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lists */
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