s390/scsi/zfcp_ccw.c

1 // SPDX-License-Identifier: GPL-2.0
27 	adapter = dev_get_drvdata(&cdev->dev);  in zfcp_ccw_adapter_by_cdev()
29 		kref_get(&adapter->ref);  in zfcp_ccw_adapter_by_cdev()
39 	kref_put(&adapter->ref, zfcp_adapter_release);  in zfcp_ccw_adapter_put()
44  * zfcp_ccw_activate - activate adapter and wait for it to finish
62 	 * We want to scan ports here, with some random backoff and without  in zfcp_ccw_activate()
70 	 * point in waiting a random delay on top of the time consumed by  in zfcp_ccw_activate()
75 	flush_delayed_work(&adapter->scan_work);  in zfcp_ccw_activate()
90  * zfcp_ccw_probe - probe function of zfcp driver
104  * zfcp_ccw_remove - remove function of zfcp driver
108  * from the system. Task of this function is to get rid of all units and
109  * ports that belong to this adapter. And in addition all resources of this
126 	write_lock_irq(&adapter->port_list_lock);  in zfcp_ccw_remove()
127 	list_for_each_entry(port, &adapter->port_list, list) {  in zfcp_ccw_remove()
128 		write_lock(&port->unit_list_lock);  in zfcp_ccw_remove()
129 		list_splice_init(&port->unit_list, &unit_remove_lh);  in zfcp_ccw_remove()
130 		write_unlock(&port->unit_list_lock);  in zfcp_ccw_remove()
132 	list_splice_init(&adapter->port_list, &port_remove_lh);  in zfcp_ccw_remove()
133 	write_unlock_irq(&adapter->port_list_lock);  in zfcp_ccw_remove()
137 		device_unregister(&unit->dev);  in zfcp_ccw_remove()
140 		device_unregister(&port->dev);  in zfcp_ccw_remove()
146  * zfcp_ccw_set_online - set_online function of zfcp driver
149  * This function gets called by the common i/o layer and sets an
166 			dev_err(&cdev->dev,  in zfcp_ccw_set_online()
171 		kref_get(&adapter->ref);  in zfcp_ccw_set_online()
175 	BUG_ON(!zfcp_reqlist_isempty(adapter->req_list));  in zfcp_ccw_set_online()
176 	adapter->req_no = 0;  in zfcp_ccw_set_online()
181 	 * We want to scan ports here, always, with some random delay and  in zfcp_ccw_set_online()
182 	 * without rate limit - basically what zfcp_ccw_activate() has  in zfcp_ccw_set_online()
191 	flush_delayed_work(&adapter->scan_work);  in zfcp_ccw_set_online()
197  * zfcp_ccw_set_offline - set_offline function of zfcp driver
200  * This function gets called by the common i/o layer and sets an adapter
219  * zfcp_ccw_notify - ccw notify function
235 		dev_warn(&cdev->dev, "The FCP device has been detached\n");  in zfcp_ccw_notify()
239 		dev_warn(&cdev->dev,  in zfcp_ccw_notify()
244 		dev_info(&cdev->dev, "The FCP device is operational again\n");  in zfcp_ccw_notify()
251 		dev_warn(&cdev->dev, "The FCP device did not respond within "  in zfcp_ccw_notify()
262  * zfcp_ccw_shutdown - handle shutdown from cio