From patchwork Wed Oct 7 20:57:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Karsten Graul X-Patchwork-Id: 11821847 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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 721E4C4363C for ; Wed, 7 Oct 2020 20:58:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 37A632083B for ; Wed, 7 Oct 2020 20:58:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="GXBFMRYv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728641AbgJGU6E (ORCPT ); Wed, 7 Oct 2020 16:58:04 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:58704 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728613AbgJGU6A (ORCPT ); Wed, 7 Oct 2020 16:58:00 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 097KVuKf050022; Wed, 7 Oct 2020 16:57:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=pp1; bh=yhh+Y9v/JCR/uvPDCqNhT/8coyWYfD9DDsj4+WZykB0=; b=GXBFMRYv7bblCK3MycheTk97INcYucflRIFPgP1j/eEcr9piQqm3+aZyUw8mUs9qijsD G2UVqTQod+Yvn6WQuOGtscHFDriBKMgUA30lvKTA3jbTBTkiCFGjpvkiuABUj5sTSD6M 2+RlU9dfLu0If/7lhvW9XpJn3PJFs6RP+J5VExU0oM59kdVcFIh0NMUmpzbYKTAfq/9T +1+1xzqYom60NLBSU/7LDw+C0kixEO2+r60Z32z8zoRGGiEO9Zv0fuVhsXV5pHKPTSnh RSHOja1jhBgL3+h3GuujqGJWBviY9bu0seXoCohsxGVSOSyk6v6Cy9OzaJHCuunT0LId sA== Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0a-001b2d01.pphosted.com with ESMTP id 341kvna4j0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Oct 2020 16:57:57 -0400 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 097KulWV032754; Wed, 7 Oct 2020 20:57:55 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma06fra.de.ibm.com with ESMTP id 33xgjhadmw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Oct 2020 20:57:55 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 097KvqGF24707502 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 7 Oct 2020 20:57:52 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4F020AE045; Wed, 7 Oct 2020 20:57:52 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 133C9AE04D; Wed, 7 Oct 2020 20:57:52 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 7 Oct 2020 20:57:52 +0000 (GMT) From: Karsten Graul To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com, raspl@linux.ibm.com, ubraun@linux.ibm.com Subject: [PATCH net-next 3/3] net/smc: restore smcd_version when all ISM V2 devices failed to init Date: Wed, 7 Oct 2020 22:57:43 +0200 Message-Id: <20201007205743.83535-4-kgraul@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201007205743.83535-1-kgraul@linux.ibm.com> References: <20201007205743.83535-1-kgraul@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-10-07_10:2020-10-07,2020-10-07 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 impostorscore=0 suspectscore=1 bulkscore=0 phishscore=0 mlxscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2010070127 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Field ini->smcd_version is set to SMC_V2 before calling smc_listen_ism_init(). This clears the V1 bit that may be set. When all matching ISM V2 devices fail to initialize then the smcd_version field needs to get restored to allow any possible V1 devices to initialize. And be consistent, always go to the not_found label when no device was found. Signed-off-by: Karsten Graul --- net/smc/af_smc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index f481f0ed2b78..82be0bd0f6e8 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -1481,11 +1481,12 @@ static void smc_find_ism_v2_device_serv(struct smc_sock *new_smc, struct smc_clc_v2_extension *smc_v2_ext; struct smc_clc_msg_smcd *pclc_smcd; unsigned int matches = 0; + u8 smcd_version; u8 *eid = NULL; int i; if (!(ini->smcd_version & SMC_V2) || !smcd_indicated(ini->smc_type_v2)) - return; + goto not_found; pclc_smcd = smc_get_clc_msg_smcd(pclc); smc_v2_ext = smc_get_clc_v2_ext(pclc); @@ -1519,6 +1520,7 @@ static void smc_find_ism_v2_device_serv(struct smc_sock *new_smc, } /* separate - outside the smcd_dev_list.lock */ + smcd_version = ini->smcd_version; for (i = 0; i < matches; i++) { ini->smcd_version = SMC_V2; ini->is_smcd = true; @@ -1528,6 +1530,8 @@ static void smc_find_ism_v2_device_serv(struct smc_sock *new_smc, continue; return; /* matching and usable V2 ISM device found */ } + /* no V2 ISM device could be initialized */ + ini->smcd_version = smcd_version; /* restore original value */ not_found: ini->smcd_version &= ~SMC_V2;