1 files changed, 39 insertions, 5 deletions

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index ed8d9709b9b9..dfc726fa34e3 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -2093,7 +2093,12 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 					 "could not register session's dev\n");
 		goto release_ida;
 	}
-	transport_register_device(&session->dev);
+	err = transport_register_device(&session->dev);
+	if (err) {
+		iscsi_cls_session_printk(KERN_ERR, session,
+					 "could not register transport's dev\n");
+		goto release_dev;
+	}
 
 	spin_lock_irqsave(&sesslock, flags);
 	list_add(&session->sess_list, &sesslist);
@@ -2103,6 +2108,8 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 	ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
 	return 0;
 
+release_dev:
+	device_del(&session->dev);
 release_ida:
 	if (session->ida_used)
 		ida_simple_remove(&iscsi_sess_ida, session->target_id);
@@ -2263,7 +2270,12 @@ iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
 					 "register connection's dev\n");
 		goto release_parent_ref;
 	}
-	transport_register_device(&conn->dev);
+	err = transport_register_device(&conn->dev);
+	if (err) {
+		iscsi_cls_session_printk(KERN_ERR, session, "could not "
+					 "register transport's dev\n");
+		goto release_conn_ref;
+	}
 
 	spin_lock_irqsave(&connlock, flags);
 	list_add(&conn->conn_list, &connlist);
@@ -2272,6 +2284,8 @@ iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
 	ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
 	return conn;
 
+release_conn_ref:
+	put_device(&conn->dev);
 release_parent_ref:
 	put_device(&session->dev);
 free_conn:
@@ -2947,6 +2961,24 @@ iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
 	return err;
 }
 
+static int iscsi_session_has_conns(int sid)
+{
+	struct iscsi_cls_conn *conn;
+	unsigned long flags;
+	int found = 0;
+
+	spin_lock_irqsave(&connlock, flags);
+	list_for_each_entry(conn, &connlist, conn_list) {
+		if (iscsi_conn_get_sid(conn) == sid) {
+			found = 1;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&connlock, flags);
+
+	return found;
+}
+
 static int
 iscsi_set_iface_params(struct iscsi_transport *transport,
 		       struct iscsi_uevent *ev, uint32_t len)
@@ -3524,10 +3556,12 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
 		break;
 	case ISCSI_UEVENT_DESTROY_SESSION:
 		session = iscsi_session_lookup(ev->u.d_session.sid);
-		if (session)
-			transport->destroy_session(session);
-		else
+		if (!session)
 			err = -EINVAL;
+		else if (iscsi_session_has_conns(ev->u.d_session.sid))
+			err = -EBUSY;
+		else
+			transport->destroy_session(session);
 		break;
 	case ISCSI_UEVENT_UNBIND_SESSION:
 		session = iscsi_session_lookup(ev->u.d_session.sid);