From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julian Wiedmann Subject: [PATCH net-next 03/15] s390/qeth: fix discipline unload after setup error Date: Wed, 26 Sep 2018 18:29:04 +0200 Message-ID: <20180926162916.102720-4-jwi@linux.ibm.com> References: <20180926162916.102720-1-jwi@linux.ibm.com> Cc: , , Martin Schwidefsky , Heiko Carstens , Stefan Raspl , Ursula Braun , Julian Wiedmann To: David Miller Return-path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:58224 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728599AbeIZWnU (ORCPT ); Wed, 26 Sep 2018 18:43:20 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8QGKNmY060643 for ; Wed, 26 Sep 2018 12:29:35 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 2mrb8g0cek-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 26 Sep 2018 12:29:34 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 26 Sep 2018 17:29:32 +0100 In-Reply-To: <20180926162916.102720-1-jwi@linux.ibm.com> Sender: netdev-owner@vger.kernel.org List-ID: Device initialization code usually first loads a subdriver (via qeth_core_load_discipline()), and then runs its setup() callback. If this fails, it rolls back the load via qeth_core_free_discipline(). qeth_core_free_discipline() expects the options.layer attribute to be initialized, but on error in setup() that's currently not the case. Resulting in misbalanced symbol_put() calls. Fix this by setting options.layer when loading the subdriver. Signed-off-by: Julian Wiedmann --- drivers/s390/net/qeth_core_main.c | 2 ++ drivers/s390/net/qeth_core_sys.c | 2 -- drivers/s390/net/qeth_l2_main.c | 1 - drivers/s390/net/qeth_l3_main.c | 1 - 4 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index c3068f680f67..1fed8f113f40 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -5614,6 +5614,7 @@ int qeth_core_load_discipline(struct qeth_card *card, return -EINVAL; } + card->options.layer = discipline; return 0; } @@ -5623,6 +5624,7 @@ void qeth_core_free_discipline(struct qeth_card *card) symbol_put(qeth_l2_discipline); else symbol_put(qeth_l3_discipline); + card->options.layer = QETH_DISCIPLINE_UNDETERMINED; card->discipline = NULL; } diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c index fdb67af811f4..970f6c71a66e 100644 --- a/drivers/s390/net/qeth_core_sys.c +++ b/drivers/s390/net/qeth_core_sys.c @@ -432,8 +432,6 @@ static ssize_t qeth_dev_layer2_store(struct device *dev, card->discipline->remove(card->gdev); qeth_core_free_discipline(card); - card->options.layer = QETH_DISCIPLINE_UNDETERMINED; - free_netdev(card->dev); card->dev = ndev; } diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index afa7a005b21e..02566af7e23d 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -806,7 +806,6 @@ static int qeth_l2_probe_device(struct ccwgroup_device *gdev) } INIT_LIST_HEAD(&card->vid_list); hash_init(card->mac_htable); - card->options.layer = QETH_DISCIPLINE_LAYER2; card->info.hwtrap = 0; qeth_l2_vnicc_set_defaults(card); return 0; diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 552bfad20f85..2756795f7708 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -2489,7 +2489,6 @@ static int qeth_l3_probe_device(struct ccwgroup_device *gdev) } hash_init(card->ip_htable); hash_init(card->ip_mc_htable); - card->options.layer = QETH_DISCIPLINE_LAYER3; card->info.hwtrap = 0; return 0; } -- 2.16.4