diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 91a260c588f06b3a8394f4ea356f346fcb9a131f..46ad67f8614816a7c9d0327057c05ff0f3865fdd 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -3253,6 +3253,13 @@ int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
 		session->leadconn = conn;
 	spin_unlock_bh(&session->frwd_lock);
 
+	/*
+	 * The target could have reduced it's window size between logins, so
+	 * we have to reset max/exp cmdsn so we can see the new values.
+	 */
+	spin_lock_bh(&session->back_lock);
+	session->max_cmdsn = session->exp_cmdsn = session->cmdsn + 1;
+	spin_unlock_bh(&session->back_lock);
 	/*
 	 * Unblock xmitworker(), Login Phase will pass through.
 	 */