From patchwork Wed Jun 10 15:05:17 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Himanshu Madhani X-Patchwork-Id: 6582331 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DFF0DC0020 for ; Wed, 10 Jun 2015 15:52:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E883220386 for ; Wed, 10 Jun 2015 15:52:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EFCA9203A0 for ; Wed, 10 Jun 2015 15:52:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965195AbbFJPw2 (ORCPT ); Wed, 10 Jun 2015 11:52:28 -0400 Received: from mx0a-0016ce01.pphosted.com ([67.231.148.157]:53855 "EHLO mx0a-0016ce01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965993AbbFJPtL (ORCPT ); Wed, 10 Jun 2015 11:49:11 -0400 Received: from pps.filterd (m0045602.ppops.net [127.0.0.1]) by mx0a-0016ce01.pphosted.com (8.14.5/8.14.5) with SMTP id t5AFhrae007950; Wed, 10 Jun 2015 08:48:59 -0700 Received: from avcashub1.qlogic.com (avcashub2.qlogic.com [198.70.193.116]) by mx0a-0016ce01.pphosted.com with ESMTP id 1uxr49g0ca-2 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Wed, 10 Jun 2015 08:48:59 -0700 Received: from dut6217.mv.qlogic.com (172.29.56.217) by qlc.com (10.1.4.191) with Microsoft SMTP Server id 14.3.235.1; Wed, 10 Jun 2015 08:48:58 -0700 Received: by dut6217.mv.qlogic.com (Postfix, from userid 0) id 49293521E3A; Wed, 10 Jun 2015 11:05:25 -0400 (EDT) From: Himanshu Madhani To: CC: , , , , Subject: [PATCH 1/9] qla2xxx: Fix hardware lock/unlock issue causing kernel panic. Date: Wed, 10 Jun 2015 11:05:17 -0400 Message-ID: <1433948725-4073-2-git-send-email-himanshu.madhani@qlogic.com> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1433948725-4073-1-git-send-email-himanshu.madhani@qlogic.com> References: <1433948725-4073-1-git-send-email-himanshu.madhani@qlogic.com> MIME-Version: 1.0 disclaimer: bypass X-Proofpoint-Virus-Version: vendor=nai engine=5700 definitions=7827 signatures=670588 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=1 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1506100251 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Saurav Kashyap [ Upstream commit ef86cb2059a14b4024c7320999ee58e938873032 ] This patch fixes a kernel panic for qla2xxx Target core Module driver introduced by a fix in the qla2xxx initiator code. Commit ef86cb2 ("qla2xxx: Mark port lost when we receive an RSCN for it.") introduced the regression for qla2xxx Target driver. Stack trace will have following signature --- --- [ffff88081faa3cc8] _raw_spin_lock_irqsave at ffffffff815b1f03 [ffff88081faa3cd0] qlt_fc_port_deleted at ffffffffa096ccd0 [qla2xxx] [ffff88081faa3d20] qla2x00_schedule_rport_del at ffffffffa0913831[qla2xxx] [ffff88081faa3d50] qla2x00_mark_device_lost at ffffffffa09159c5[qla2xxx] [ffff88081faa3db0] qla2x00_async_event at ffffffffa0938d59 [qla2xxx] [ffff88081faa3e30] qla24xx_msix_default at ffffffffa093a326 [qla2xxx] [ffff88081faa3e90] handle_irq_event_percpu at ffffffff810a7b8d [ffff88081faa3ee0] handle_irq_event at ffffffff810a7d32 [ffff88081faa3f10] handle_edge_irq at ffffffff810ab6b9 [ffff88081faa3f30] handle_irq at ffffffff8100619c [ffff88081faa3f70] do_IRQ at ffffffff815b4b1c --- --- Cc: Signed-off-by: Saurav Kashyap Signed-off-by: Himanshu Madhani --- drivers/scsi/qla2xxx/qla_init.c | 4 ++++ drivers/scsi/qla2xxx/qla_target.c | 6 ------ 2 files changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 285cb20..3c1550a 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -2924,6 +2924,7 @@ qla2x00_rport_del(void *data) struct fc_rport *rport; scsi_qla_host_t *vha = fcport->vha; unsigned long flags; + unsigned long vha_flags; spin_lock_irqsave(fcport->vha->host->host_lock, flags); rport = fcport->drport ? fcport->drport: fcport->rport; @@ -2935,7 +2936,9 @@ qla2x00_rport_del(void *data) * Release the target mode FC NEXUS in qla_target.c code * if target mod is enabled. */ + spin_lock_irqsave(&vha->hw->hardware_lock, vha_flags); qlt_fc_port_deleted(vha, fcport); + spin_unlock_irqrestore(&vha->hw->hardware_lock, vha_flags); } } @@ -3303,6 +3306,7 @@ qla2x00_reg_remote_port(scsi_qla_host_t *vha, fc_port_t *fcport) * Create target mode FC NEXUS in qla_target.c if target mode is * enabled.. */ + qlt_fc_port_added(vha, fcport); spin_lock_irqsave(fcport->vha->host->host_lock, flags); diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index fe8a8d1..ed39ed2 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -782,10 +782,8 @@ void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) { - struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_tgt_sess *sess; - unsigned long flags; if (!vha->hw->tgt.tgt_ops) return; @@ -793,14 +791,11 @@ void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) if (!tgt || (fcport->port_type != FCT_INITIATOR)) return; - spin_lock_irqsave(&ha->hardware_lock, flags); if (tgt->tgt_stop) { - spin_unlock_irqrestore(&ha->hardware_lock, flags); return; } sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); if (!sess) { - spin_unlock_irqrestore(&ha->hardware_lock, flags); return; } @@ -808,7 +803,6 @@ void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) sess->local = 1; qlt_schedule_sess_for_deletion(sess, false); - spin_unlock_irqrestore(&ha->hardware_lock, flags); } static inline int test_tgt_sess_count(struct qla_tgt *tgt)