From patchwork Sat Jul 2 05:00:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tetsuo Handa X-Patchwork-Id: 12903902 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B36C0C433EF for ; Sat, 2 Jul 2022 05:00:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230415AbiGBFAZ (ORCPT ); Sat, 2 Jul 2022 01:00:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229486AbiGBFAY (ORCPT ); Sat, 2 Jul 2022 01:00:24 -0400 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 40C531AD9D for ; Fri, 1 Jul 2022 22:00:21 -0700 (PDT) Received: from fsav114.sakura.ne.jp (fsav114.sakura.ne.jp [27.133.134.241]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 26250A5o060222; Sat, 2 Jul 2022 14:00:10 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav114.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav114.sakura.ne.jp); Sat, 02 Jul 2022 14:00:10 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav114.sakura.ne.jp) Received: from [192.168.1.9] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 262501jX060179 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Sat, 2 Jul 2022 14:00:09 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: Date: Sat, 2 Jul 2022 14:00:01 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: [PATCH v3 1/4] scsi: qla2xxx: Remove unused del_sess_list field Content-Language: en-US From: Tetsuo Handa To: Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, "James E.J. Bottomley" , "Martin K. Petersen" Cc: linux-scsi@vger.kernel.org References: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> In-Reply-To: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org "struct qla_tgt"->del_sess_list is no longer used since commit 726b85487067d7f5 ("qla2xxx: Add framework for async fabric discovery"). Signed-off-by: Tetsuo Handa --- drivers/scsi/qla2xxx/qla_target.c | 1 - drivers/scsi/qla2xxx/qla_target.h | 3 --- 2 files changed, 4 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 2b2f68288375..d9e0e7ffe130 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -6512,7 +6512,6 @@ int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) tgt->ha = ha; tgt->vha = base_vha; init_waitqueue_head(&tgt->waitQ); - INIT_LIST_HEAD(&tgt->del_sess_list); spin_lock_init(&tgt->sess_work_lock); INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); INIT_LIST_HEAD(&tgt->sess_works_list); diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h index de3942b8efc4..e899e13696e9 100644 --- a/drivers/scsi/qla2xxx/qla_target.h +++ b/drivers/scsi/qla2xxx/qla_target.h @@ -813,9 +813,6 @@ struct qla_tgt { /* Count of sessions refering qla_tgt. Protected by hardware_lock. */ int sess_count; - /* Protected by hardware_lock */ - struct list_head del_sess_list; - spinlock_t sess_work_lock; struct list_head sess_works_list; struct work_struct sess_work; From patchwork Sat Jul 2 05:00:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tetsuo Handa X-Patchwork-Id: 12903905 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C5C8C43334 for ; Sat, 2 Jul 2022 05:05:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229910AbiGBFF2 (ORCPT ); Sat, 2 Jul 2022 01:05:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229446AbiGBFF1 (ORCPT ); Sat, 2 Jul 2022 01:05:27 -0400 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3569A28E06 for ; Fri, 1 Jul 2022 22:05:26 -0700 (PDT) Received: from fsav314.sakura.ne.jp (fsav314.sakura.ne.jp [153.120.85.145]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 26250FLh060241; Sat, 2 Jul 2022 14:00:15 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav314.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav314.sakura.ne.jp); Sat, 02 Jul 2022 14:00:15 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav314.sakura.ne.jp) Received: from [192.168.1.9] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 26250FTI060238 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Sat, 2 Jul 2022 14:00:15 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: <1218e85a-828b-4206-99c0-a3efb8d8c64c@I-love.SAKURA.ne.jp> Date: Sat, 2 Jul 2022 14:00:15 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: [PATCH v3 2/4] scsi: qla2xxx: Remove unused qlt_tmr_work() Content-Language: en-US From: Tetsuo Handa To: Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, "James E.J. Bottomley" , "Martin K. Petersen" Cc: linux-scsi@vger.kernel.org References: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> In-Reply-To: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org qlt_tmr_work() is no longer used since commit fb35265b12bb9ba4 ("scsi: qla2xxx: Remove session creation redundant code"). Signed-off-by: Tetsuo Handa --- drivers/scsi/qla2xxx/qla_target.c | 66 ------------------------------- drivers/scsi/qla2xxx/qla_target.h | 1 - 2 files changed, 67 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index d9e0e7ffe130..b170ebbd05b7 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -6334,69 +6334,6 @@ static void qlt_abort_work(struct qla_tgt *tgt, spin_unlock_irqrestore(&ha->hardware_lock, flags); } -static void qlt_tmr_work(struct qla_tgt *tgt, - struct qla_tgt_sess_work_param *prm) -{ - struct atio_from_isp *a = &prm->tm_iocb2; - struct scsi_qla_host *vha = tgt->vha; - struct qla_hw_data *ha = vha->hw; - struct fc_port *sess; - unsigned long flags; - be_id_t s_id; - int rc; - u64 unpacked_lun; - int fn; - void *iocb; - - spin_lock_irqsave(&ha->tgt.sess_lock, flags); - - if (tgt->tgt_stop) - goto out_term2; - - s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; - sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); - if (!sess) { - spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); - - sess = qlt_make_local_sess(vha, s_id); - /* sess has got an extra creation ref */ - - spin_lock_irqsave(&ha->tgt.sess_lock, flags); - if (!sess) - goto out_term2; - } else { - if (sess->deleted) { - goto out_term2; - } - - if (!kref_get_unless_zero(&sess->sess_kref)) { - ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020, - "%s: kref_get fail %8phC\n", - __func__, sess->port_name); - goto out_term2; - } - } - - iocb = a; - fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; - unpacked_lun = - scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun); - - rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); - spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); - - ha->tgt.tgt_ops->put_sess(sess); - - if (rc != 0) - goto out_term; - return; - -out_term2: - spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); -out_term: - qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0); -} - static void qlt_sess_work_fn(struct work_struct *work) { struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); @@ -6423,9 +6360,6 @@ static void qlt_sess_work_fn(struct work_struct *work) case QLA_TGT_SESS_WORK_ABORT: qlt_abort_work(tgt, prm); break; - case QLA_TGT_SESS_WORK_TM: - qlt_tmr_work(tgt, prm); - break; default: BUG_ON(1); break; diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h index e899e13696e9..080c46eb8245 100644 --- a/drivers/scsi/qla2xxx/qla_target.h +++ b/drivers/scsi/qla2xxx/qla_target.h @@ -942,7 +942,6 @@ struct qla_tgt_sess_work_param { struct list_head sess_works_list_entry; #define QLA_TGT_SESS_WORK_ABORT 1 -#define QLA_TGT_SESS_WORK_TM 2 int type; union { From patchwork Sat Jul 2 05:00:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tetsuo Handa X-Patchwork-Id: 12903903 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2669C43334 for ; Sat, 2 Jul 2022 05:00:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231293AbiGBFAc (ORCPT ); Sat, 2 Jul 2022 01:00:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229486AbiGBFAb (ORCPT ); Sat, 2 Jul 2022 01:00:31 -0400 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 689041ADA4 for ; Fri, 1 Jul 2022 22:00:30 -0700 (PDT) Received: from fsav412.sakura.ne.jp (fsav412.sakura.ne.jp [133.242.250.111]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 26250KZs060271; Sat, 2 Jul 2022 14:00:20 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav412.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav412.sakura.ne.jp); Sat, 02 Jul 2022 14:00:20 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav412.sakura.ne.jp) Received: from [192.168.1.9] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 26250KMU060264 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Sat, 2 Jul 2022 14:00:20 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: <9e454c72-5af2-5de3-db86-d27f699fa0c0@I-love.SAKURA.ne.jp> Date: Sat, 2 Jul 2022 14:00:20 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: [PATCH v3 3/4] scsi: qla2xxx: always wait for qlt_sess_work_fn() from qlt_stop_phase1() Content-Language: en-US From: Tetsuo Handa To: Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, "James E.J. Bottomley" , "Martin K. Petersen" Cc: linux-scsi@vger.kernel.org References: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> In-Reply-To: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Currently qlt_stop_phase1() may fail to call flush_scheduled_work(), for list_empty() may return true as soon as qlt_sess_work_fn() called list_del(). In order to close this race window, check list_empty() after calling flush_scheduled_work(). If this patch causes problems, please check commit c4f135d643823a86 ("workqueue: Wrap flush_workqueue() using a macro"). We are on the way to remove all flush_scheduled_work() calls from the kernel. Signed-off-by: Tetsuo Handa --- This patch is only compile tested. drivers/scsi/qla2xxx/qla_target.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index b170ebbd05b7..9013c162d4aa 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -1557,11 +1557,11 @@ int qlt_stop_phase1(struct qla_tgt *tgt) ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, "Waiting for sess works (tgt %p)", tgt); spin_lock_irqsave(&tgt->sess_work_lock, flags); - while (!list_empty(&tgt->sess_works_list)) { + do { spin_unlock_irqrestore(&tgt->sess_work_lock, flags); flush_scheduled_work(); spin_lock_irqsave(&tgt->sess_work_lock, flags); - } + } while (!list_empty(&tgt->sess_works_list)); spin_unlock_irqrestore(&tgt->sess_work_lock, flags); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, From patchwork Sat Jul 2 05:00:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tetsuo Handa X-Patchwork-Id: 12903904 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20B74C43334 for ; Sat, 2 Jul 2022 05:04:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229612AbiGBFEb (ORCPT ); Sat, 2 Jul 2022 01:04:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229446AbiGBFEa (ORCPT ); Sat, 2 Jul 2022 01:04:30 -0400 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 031292871A for ; Fri, 1 Jul 2022 22:04:28 -0700 (PDT) Received: from fsav116.sakura.ne.jp (fsav116.sakura.ne.jp [27.133.134.243]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 26250OHN060288; Sat, 2 Jul 2022 14:00:24 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav116.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav116.sakura.ne.jp); Sat, 02 Jul 2022 14:00:24 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav116.sakura.ne.jp) Received: from [192.168.1.9] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 26250OFZ060285 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Sat, 2 Jul 2022 14:00:24 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: <03f3312f-ec00-527b-e190-5d274c32c4cc@I-love.SAKURA.ne.jp> Date: Sat, 2 Jul 2022 14:00:24 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: [PATCH v3 4/4] scsi: qla2xxx: avoid flush_scheduled_work() usage Content-Language: en-US From: Tetsuo Handa To: Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, "James E.J. Bottomley" , "Martin K. Petersen" Cc: linux-scsi@vger.kernel.org References: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> In-Reply-To: <46629616-be04-9a53-b9d8-b2b947adf9d0@I-love.SAKURA.ne.jp> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Although qla2xxx driver is calling schedule_{,delayed}_work() from 10 locations, I assume that flush_scheduled_work() from qlt_stop_phase1() needs to flush only works scheduled by qlt_sched_sess_work(), for this loop continues while "struct qla_tgt"->sess_works_list is not empty. Signed-off-by: Tetsuo Handa --- This patch is only compile tested. Changes in v3: Use flush_work(). Changes in v2: Use per "struct qla_tgt" workqueue. drivers/scsi/qla2xxx/qla_target.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 9013c162d4aa..b0cb463cf032 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -1559,7 +1559,7 @@ int qlt_stop_phase1(struct qla_tgt *tgt) spin_lock_irqsave(&tgt->sess_work_lock, flags); do { spin_unlock_irqrestore(&tgt->sess_work_lock, flags); - flush_scheduled_work(); + flush_work(&tgt->sess_work); spin_lock_irqsave(&tgt->sess_work_lock, flags); } while (!list_empty(&tgt->sess_works_list)); spin_unlock_irqrestore(&tgt->sess_work_lock, flags);