scsi: core: iscsi: Directly use ida_alloc()/ida_free()

Use ida_alloc()/ida_free() instead of the deprecated
ida_simple_get()/ida_simple_remove() interface.

Link: https://lore.kernel.org/r/20220527083049.2552526-1-liuke94@huawei.comReviewed-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: keliu <liuke94@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hosts.c

@@ -350,7 +350,7 @@ static void scsi_host_dev_release(struct device *dev)
 
 	kfree(shost->shost_data);
 
-	ida_simple_remove(&host_index_ida, shost->host_no);
+	ida_free(&host_index_ida, shost->host_no);
 
 	if (shost->shost_state != SHOST_CREATED)
 		put_device(parent);
@@ -395,7 +395,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
 	init_waitqueue_head(&shost->host_wait);
 	mutex_init(&shost->scan_mutex);
 
-	index = ida_simple_get(&host_index_ida, 0, 0, GFP_KERNEL);
+	index = ida_alloc(&host_index_ida, GFP_KERNEL);
 	if (index < 0) {
 		kfree(shost);
 		return NULL;

drivers/scsi/scsi_transport_iscsi.c

@@ -1975,7 +1975,7 @@ static void __iscsi_unbind_session(struct work_struct *work)
 	scsi_remove_target(&session->dev);
 
 	if (session->ida_used)
-		ida_simple_remove(&iscsi_sess_ida, target_id);
+		ida_free(&iscsi_sess_ida, target_id);
 
 unbind_session_exit:
 	iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
@@ -2044,7 +2044,7 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 		return -ENOMEM;
 
 	if (target_id == ISCSI_MAX_TARGET) {
-		id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
+		id = ida_alloc(&iscsi_sess_ida, GFP_KERNEL);
 
 		if (id < 0) {
 			iscsi_cls_session_printk(KERN_ERR, session,
@@ -2083,7 +2083,7 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 	device_del(&session->dev);
 release_ida:
 	if (session->ida_used)
-		ida_simple_remove(&iscsi_sess_ida, session->target_id);
+		ida_free(&iscsi_sess_ida, session->target_id);
 destroy_wq:
 	destroy_workqueue(session->workq);
 	return err;