From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 22300C433E0 for ; Wed, 5 Aug 2020 03:51:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0015520842 for ; Wed, 5 Aug 2020 03:51:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727773AbgHEDvG (ORCPT ); Tue, 4 Aug 2020 23:51:06 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:9334 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726971AbgHEDvE (ORCPT ); Tue, 4 Aug 2020 23:51:04 -0400 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id C4FF1D4A86073B67D193; Wed, 5 Aug 2020 11:50:53 +0800 (CST) Received: from localhost.localdomain (10.175.112.70) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server (TLS) id 14.3.487.0; Wed, 5 Aug 2020 11:50:49 +0800 From: Zhang Changzhong To: , , , , , , CC: , , Subject: [PATCH net 3/4] can: j1939: abort multipacket broadcast session when timeout occurs Date: Wed, 5 Aug 2020 11:50:24 +0800 Message-ID: <1596599425-5534-4-git-send-email-zhangchangzhong@huawei.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1596599425-5534-1-git-send-email-zhangchangzhong@huawei.com> References: <1596599425-5534-1-git-send-email-zhangchangzhong@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.112.70] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If timeout occurs, j1939_tp_rxtimer() first calls hrtimer_start() to restart rxtimer, and then calls __j1939_session_cancel() to set session->state = J1939_SESSION_WAITING_ABORT. At next timeout expiration, because of the J1939_SESSION_WAITING_ABORT session state j1939_tp_rxtimer() will call j1939_session_deactivate_activate_next() to deactivate current session, and rxtimer won't be set. But for multipacket broadcast session, __j1939_session_cancel() don't set session->state = J1939_SESSION_WAITING_ABORT, thus current session won't be deactivate and hrtimer_start() is called to start new rxtimer again and again. So fix it by moving session->state = J1939_SESSION_WAITING_ABORT out of if (!j1939_cb_is_broadcast(&session->skcb)) statement. Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Signed-off-by: Zhang Changzhong --- net/can/j1939/transport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c index dd6a120..5757f9f 100644 --- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -1055,9 +1055,9 @@ static void __j1939_session_cancel(struct j1939_session *session, lockdep_assert_held(&session->priv->active_session_list_lock); session->err = j1939_xtp_abort_to_errno(priv, err); + session->state = J1939_SESSION_WAITING_ABORT; /* do not send aborts on incoming broadcasts */ if (!j1939_cb_is_broadcast(&session->skcb)) { - session->state = J1939_SESSION_WAITING_ABORT; j1939_xtp_tx_abort(priv, &session->skcb, !session->transmission, err, session->skcb.addr.pgn); -- 2.9.5