From patchwork Mon Jan 17 13:53:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nilesh Javali X-Patchwork-Id: 532780 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 69A1DC433FE for ; Mon, 17 Jan 2022 13:54:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235942AbiAQNyM (ORCPT ); Mon, 17 Jan 2022 08:54:12 -0500 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:36074 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235891AbiAQNyL (ORCPT ); Mon, 17 Jan 2022 08:54:11 -0500 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 20H99moO014239; Mon, 17 Jan 2022 05:54:09 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0220; bh=PvBZc0TiJMRSxFZcqfjl1cdrRhcMYR3xmQy0NUBTnss=; b=VxLrYEjZskweeDLRzn0LFQ4ugbRsa2kQDT4UVngP0OmviQZAG21W4W9xaFtXNQ0DausM aZd2P8xKXPr+HA5GACB5o6alOCT2R7AmyPwGAhrq/da0QSB5npySE0ccN1ThvcJzaZ7G HEOBqUpuITOwscbO61a8/+FDM2phz4pUt4fSE2THvqqhlt9L9eckuVtbRIb3XlQyGj1r gvZ03qx9qx9NftuFG9nNwUH1SxKx117CRKCqQghKfpztvJMaO3EuEweMaMyHeX2m07T1 JZR6+RXOc1wo35v685R3g956tElCpKV8VnnO+n+QDNvrD7R6xAGgl1RG5IvDcKFg8SMk VQ== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0b-0016f401.pphosted.com (PPS) with ESMTPS id 3dn5gg8q0h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Mon, 17 Jan 2022 05:54:09 -0800 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 17 Jan 2022 05:54:07 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 17 Jan 2022 05:54:07 -0800 Received: from dut1171.mv.qlogic.com (unknown [10.112.88.18]) by maili.marvell.com (Postfix) with ESMTP id B50AC5B6921; Mon, 17 Jan 2022 05:54:07 -0800 (PST) Received: from dut1171.mv.qlogic.com (localhost [127.0.0.1]) by dut1171.mv.qlogic.com (8.14.7/8.14.7) with ESMTP id 20HDs26S006307; Mon, 17 Jan 2022 05:54:02 -0800 Received: (from root@localhost) by dut1171.mv.qlogic.com (8.14.7/8.14.7/Submit) id 20HDrvhp006306; Mon, 17 Jan 2022 05:53:57 -0800 From: Nilesh Javali To: CC: , , , Subject: [PATCH 2/3] qedf: Fix refcount issue when LOGO is received during TMF Date: Mon, 17 Jan 2022 05:53:10 -0800 Message-ID: <20220117135311.6256-3-njavali@marvell.com> X-Mailer: git-send-email 2.12.0 In-Reply-To: <20220117135311.6256-1-njavali@marvell.com> References: <20220117135311.6256-1-njavali@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: b3HX0RiGwtsHiSIcCkIY1JgMsYT5oCmV X-Proofpoint-GUID: b3HX0RiGwtsHiSIcCkIY1JgMsYT5oCmV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-17_06,2022-01-14_01,2021-12-02_01 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Saurav Kashyap Hung task call trace was seen during LOGO processing. [ 974.309060] [0000:00:00.0]:[qedf_eh_device_reset:868]: 1:0:2:0: LUN RESET Issued... [ 974.309065] [0000:00:00.0]:[qedf_initiate_tmf:2422]: tm_flags 0x10 sc_cmd 00000000c16b930f op = 0x2a target_id = 0x2 lun=0 [ 974.309178] [0000:00:00.0]:[qedf_initiate_tmf:2431]: portid=016900 tm_flags =LUN RESET [ 974.309222] [0000:00:00.0]:[qedf_initiate_tmf:2438]: orig io_req = 00000000ec78df8f xid = 0x180 ref_cnt = 1. [ 974.309625] host1: rport 016900: Received LOGO request while in state Ready [ 974.309627] host1: rport 016900: Delete port [ 974.309642] host1: rport 016900: work event 3 [ 974.309644] host1: rport 016900: lld callback ev 3 [ 974.313243] [0000:61:00.2]:[qedf_execute_tmf:2383]:1: fcport is uploading, not executing flush. [ 974.313295] [0000:61:00.2]:[qedf_execute_tmf:2400]:1: task mgmt command success... [ 984.031088] INFO: task jbd2/dm-15-8:7645 blocked for more than 120 seconds. [ 984.031136] Not tainted 4.18.0-305.el8.x86_64 #1 [ 984.031166] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 984.031209] jbd2/dm-15-8 D 0 7645 2 0x80004080 [ 984.031212] Call Trace: [ 984.031222] __schedule+0x2c4/0x700 [ 984.031230] ? unfreeze_partials.isra.83+0x16e/0x1a0 [ 984.031233] ? bit_wait_timeout+0x90/0x90 [ 984.031235] schedule+0x38/0xa0 [ 984.031238] io_schedule+0x12/0x40 [ 984.031240] bit_wait_io+0xd/0x50 [ 984.031243] __wait_on_bit+0x6c/0x80 [ 984.031248] ? free_buffer_head+0x21/0x50 [ 984.031251] out_of_line_wait_on_bit+0x91/0xb0 [ 984.031257] ? init_wait_var_entry+0x50/0x50 [ 984.031268] jbd2_journal_commit_transaction+0x112e/0x19f0 [jbd2] [ 984.031280] kjournald2+0xbd/0x270 [jbd2] [ 984.031284] ? finish_wait+0x80/0x80 [ 984.031291] ? commit_timeout+0x10/0x10 [jbd2] [ 984.031294] kthread+0x116/0x130 [ 984.031300] ? kthread_flush_work_fn+0x10/0x10 [ 984.031305] ret_from_fork+0x1f/0x40 There was a ref count issue when LOGO is received during TMF. This leads to one of the IO hanging with the driver. Fix the ref count. Signed-off-by: Saurav Kashyap Signed-off-by: Nilesh Javali --- drivers/scsi/qedf/qedf_io.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/qedf/qedf_io.c b/drivers/scsi/qedf/qedf_io.c index 99a56ca1fb16..fab43dabe5b3 100644 --- a/drivers/scsi/qedf/qedf_io.c +++ b/drivers/scsi/qedf/qedf_io.c @@ -2250,6 +2250,7 @@ int qedf_initiate_cleanup(struct qedf_ioreq *io_req, io_req->tm_flags == FCP_TMF_TGT_RESET) { clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); io_req->sc_cmd = NULL; + kref_put(&io_req->refcount, qedf_release_cmd); complete(&io_req->tm_done); }