--- zzzz-none-000/linux-3.10.107/drivers/scsi/device_handler/scsi_dh_hp_sw.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/scsi/device_handler/scsi_dh_hp_sw.c	2021-02-04 17:41:59.000000000 +0000
@@ -49,13 +49,6 @@
 
 static int hp_sw_start_stop(struct hp_sw_dh_data *);
 
-static inline struct hp_sw_dh_data *get_hp_sw_data(struct scsi_device *sdev)
-{
-	struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data;
-	BUG_ON(scsi_dh_data == NULL);
-	return ((struct hp_sw_dh_data *) scsi_dh_data->buf);
-}
-
 /*
  * tur_done - Handle TEST UNIT READY return status
  * @sdev: sdev the command has been sent to
@@ -117,10 +110,10 @@
 
 retry:
 	req = blk_get_request(sdev->request_queue, WRITE, GFP_NOIO);
-	if (!req)
+	if (IS_ERR(req))
 		return SCSI_DH_RES_TEMP_UNAVAIL;
 
-	req->cmd_type = REQ_TYPE_BLOCK_PC;
+	blk_rq_set_block_pc(req);
 	req->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT |
 			  REQ_FAILFAST_DRIVER;
 	req->cmd_len = COMMAND_SIZE(TEST_UNIT_READY);
@@ -247,10 +240,10 @@
 	struct request *req;
 
 	req = blk_get_request(h->sdev->request_queue, WRITE, GFP_ATOMIC);
-	if (!req)
+	if (IS_ERR(req))
 		return SCSI_DH_RES_TEMP_UNAVAIL;
 
-	req->cmd_type = REQ_TYPE_BLOCK_PC;
+	blk_rq_set_block_pc(req);
 	req->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT |
 			  REQ_FAILFAST_DRIVER;
 	req->cmd_len = COMMAND_SIZE(START_STOP);
@@ -268,7 +261,7 @@
 
 static int hp_sw_prep_fn(struct scsi_device *sdev, struct request *req)
 {
-	struct hp_sw_dh_data *h = get_hp_sw_data(sdev);
+	struct hp_sw_dh_data *h = sdev->handler_data;
 	int ret = BLKPREP_OK;
 
 	if (h->path_state != HP_SW_PATH_ACTIVE) {
@@ -293,7 +286,7 @@
 				activate_complete fn, void *data)
 {
 	int ret = SCSI_DH_OK;
-	struct hp_sw_dh_data *h = get_hp_sw_data(sdev);
+	struct hp_sw_dh_data *h = sdev->handler_data;
 
 	ret = hp_sw_tur(sdev, h);
 
@@ -312,63 +305,14 @@
 	return 0;
 }
 
-static const struct scsi_dh_devlist hp_sw_dh_data_list[] = {
-	{"COMPAQ", "MSA1000 VOLUME"},
-	{"COMPAQ", "HSV110"},
-	{"HP", "HSV100"},
-	{"DEC", "HSG80"},
-	{NULL, NULL},
-};
-
-static bool hp_sw_match(struct scsi_device *sdev)
-{
-	int i;
-
-	if (scsi_device_tpgs(sdev))
-		return false;
-
-	for (i = 0; hp_sw_dh_data_list[i].vendor; i++) {
-		if (!strncmp(sdev->vendor, hp_sw_dh_data_list[i].vendor,
-			strlen(hp_sw_dh_data_list[i].vendor)) &&
-		    !strncmp(sdev->model, hp_sw_dh_data_list[i].model,
-			strlen(hp_sw_dh_data_list[i].model))) {
-			return true;
-		}
-	}
-	return false;
-}
-
-static int hp_sw_bus_attach(struct scsi_device *sdev);
-static void hp_sw_bus_detach(struct scsi_device *sdev);
-
-static struct scsi_device_handler hp_sw_dh = {
-	.name		= HP_SW_NAME,
-	.module		= THIS_MODULE,
-	.devlist	= hp_sw_dh_data_list,
-	.attach		= hp_sw_bus_attach,
-	.detach		= hp_sw_bus_detach,
-	.activate	= hp_sw_activate,
-	.prep_fn	= hp_sw_prep_fn,
-	.match		= hp_sw_match,
-};
-
 static int hp_sw_bus_attach(struct scsi_device *sdev)
 {
-	struct scsi_dh_data *scsi_dh_data;
 	struct hp_sw_dh_data *h;
-	unsigned long flags;
 	int ret;
 
-	scsi_dh_data = kzalloc(sizeof(*scsi_dh_data)
-			       + sizeof(*h) , GFP_KERNEL);
-	if (!scsi_dh_data) {
-		sdev_printk(KERN_ERR, sdev, "%s: Attach Failed\n",
-			    HP_SW_NAME);
-		return 0;
-	}
-
-	scsi_dh_data->scsi_dh = &hp_sw_dh;
-	h = (struct hp_sw_dh_data *) scsi_dh_data->buf;
+	h = kzalloc(sizeof(*h), GFP_KERNEL);
+	if (!h)
+		return -ENOMEM;
 	h->path_state = HP_SW_PATH_UNINITIALIZED;
 	h->retries = HP_SW_RETRIES;
 	h->sdev = sdev;
@@ -377,42 +321,32 @@
 	if (ret != SCSI_DH_OK || h->path_state == HP_SW_PATH_UNINITIALIZED)
 		goto failed;
 
-	if (!try_module_get(THIS_MODULE))
-		goto failed;
-
-	spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
-	sdev->scsi_dh_data = scsi_dh_data;
-	spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
-
 	sdev_printk(KERN_INFO, sdev, "%s: attached to %s path\n",
 		    HP_SW_NAME, h->path_state == HP_SW_PATH_ACTIVE?
 		    "active":"passive");
 
+	sdev->handler_data = h;
 	return 0;
-
 failed:
-	kfree(scsi_dh_data);
-	sdev_printk(KERN_ERR, sdev, "%s: not attached\n",
-		    HP_SW_NAME);
+	kfree(h);
 	return -EINVAL;
 }
 
 static void hp_sw_bus_detach( struct scsi_device *sdev )
 {
-	struct scsi_dh_data *scsi_dh_data;
-	unsigned long flags;
-
-	spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
-	scsi_dh_data = sdev->scsi_dh_data;
-	sdev->scsi_dh_data = NULL;
-	spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
-	module_put(THIS_MODULE);
-
-	sdev_printk(KERN_NOTICE, sdev, "%s: Detached\n", HP_SW_NAME);
-
-	kfree(scsi_dh_data);
+	kfree(sdev->handler_data);
+	sdev->handler_data = NULL;
 }
 
+static struct scsi_device_handler hp_sw_dh = {
+	.name		= HP_SW_NAME,
+	.module		= THIS_MODULE,
+	.attach		= hp_sw_bus_attach,
+	.detach		= hp_sw_bus_detach,
+	.activate	= hp_sw_activate,
+	.prep_fn	= hp_sw_prep_fn,
+};
+
 static int __init hp_sw_init(void)
 {
 	return scsi_register_device_handler(&hp_sw_dh);