From patchwork Tue Nov 24 09:35:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 331923 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D474C56201 for ; Tue, 24 Nov 2020 09:36:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 413B32137B for ; Tue, 24 Nov 2020 09:36:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731339AbgKXJgX (ORCPT ); Tue, 24 Nov 2020 04:36:23 -0500 Received: from mxout70.expurgate.net ([91.198.224.70]:36390 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731310AbgKXJgT (ORCPT ); Tue, 24 Nov 2020 04:36:19 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.92) (envelope-from ) id 1khUkB-000PIb-4V; Tue, 24 Nov 2020 10:36:15 +0100 Received: from [195.243.126.94] (helo=securemail.tdt.de) by relay.expurgate.net with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1khUkA-000AJE-9s; Tue, 24 Nov 2020 10:36:14 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id 11591240041; Tue, 24 Nov 2020 10:36:14 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id 88F5E240040; Tue, 24 Nov 2020 10:36:13 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 1775020115; Tue, 24 Nov 2020 10:36:13 +0100 (CET) From: Martin Schiller To: andrew.hendry@gmail.com, davem@davemloft.net, kuba@kernel.org, xie.he.0141@gmail.com Cc: linux-x25@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Martin Schiller Subject: [PATCH net-next v5 3/5] net/lapb: fix t1 timer handling for LAPB_STATE_0 Date: Tue, 24 Nov 2020 10:35:36 +0100 Message-ID: <20201124093538.21177-4-ms@dev.tdt.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201124093538.21177-1-ms@dev.tdt.de> References: <20201124093538.21177-1-ms@dev.tdt.de> MIME-Version: 1.0 X-purgate-ID: 151534::1606210574-00016B9D-9671951C/0/0 X-purgate-type: clean X-purgate: clean Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org 1. DTE interface changes immediately to LAPB_STATE_1 and start sending SABM(E). 2. DCE interface sends N2-times DM and changes to LAPB_STATE_1 afterwards if there is no response in the meantime. Signed-off-by: Martin Schiller --- net/lapb/lapb_timer.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/net/lapb/lapb_timer.c b/net/lapb/lapb_timer.c index 8f5b17001a07..baa247fe4ed0 100644 --- a/net/lapb/lapb_timer.c +++ b/net/lapb/lapb_timer.c @@ -85,11 +85,18 @@ static void lapb_t1timer_expiry(struct timer_list *t) switch (lapb->state) { /* - * If we are a DCE, keep going DM .. DM .. DM + * If we are a DCE, send DM up to N2 times, then switch to + * STATE_1 and send SABM(E). */ case LAPB_STATE_0: - if (lapb->mode & LAPB_DCE) + if (lapb->mode & LAPB_DCE && + lapb->n2count != lapb->n2) { + lapb->n2count++; lapb_send_control(lapb, LAPB_DM, LAPB_POLLOFF, LAPB_RESPONSE); + } else { + lapb->state = LAPB_STATE_1; + lapb_establish_data_link(lapb); + } break; /*