scsi/device_handler/scsi_dh_hp_sw.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
8  * Copyright (C) 2008 Hannes Reinecke <hare@suse.de>
23 #define HP_SW_PATH_UNINITIALIZED	-1
37  * tur_done - Handle TEST UNIT READY return status
48 	switch (sshdr->sense_key) {  in tur_done()
50 		if (sshdr->asc == 0x04 && sshdr->ascq == 2) {  in tur_done()
52 			 * LUN not ready - Initialization command required  in tur_done()
56 			h->path_state = HP_SW_PATH_PASSIVE;  in tur_done()
64 			   HP_SW_NAME, sshdr->sense_key, sshdr->asc,  in tur_done()
65 			   sshdr->ascq);  in tur_done()
72  * hp_sw_tur - Send TEST UNIT READY
108 		h->path_state = HP_SW_PATH_ACTIVE;  in hp_sw_tur()
121  * hp_sw_start_stop - Send START STOP UNIT command
130 	struct scsi_device *sdev = h->sdev;  in hp_sw_start_stop()
137 			 * LUN not ready - manual intervention required  in hp_sw_start_stop()
139 			 * Switch-over in progress, retry.  in hp_sw_start_stop()
188 	struct hp_sw_dh_data *h = sdev->handler_data;  in hp_sw_prep_fn()
190 	if (h->path_state != HP_SW_PATH_ACTIVE) {  in hp_sw_prep_fn()
191 		req->rq_flags |= RQF_QUIET;  in hp_sw_prep_fn()
199  * hp_sw_activate - Activate a path
200  * @sdev: sdev on the path to be activated
212 	struct hp_sw_dh_data *h = sdev->handler_data;  in hp_sw_activate()
216 	if (ret == SCSI_DH_OK && h->path_state == HP_SW_PATH_PASSIVE)  in hp_sw_activate()
232 	h->path_state = HP_SW_PATH_UNINITIALIZED;  in hp_sw_bus_attach()
233 	h->retries = HP_SW_RETRIES;  in hp_sw_bus_attach()
234 	h->sdev = sdev;  in hp_sw_bus_attach()
239 	if (h->path_state == HP_SW_PATH_UNINITIALIZED) {  in hp_sw_bus_attach()
245 		    HP_SW_NAME, h->path_state == HP_SW_PATH_ACTIVE?  in hp_sw_bus_attach()
248 	sdev->handler_data = h;  in hp_sw_bus_attach()
257 	kfree(sdev->handler_data);  in hp_sw_bus_detach()
258 	sdev->handler_data = NULL;  in hp_sw_bus_detach()