From mboxrd@z Thu Jan 1 00:00:00 1970 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 B9A9CC433FE for ; Thu, 3 Feb 2022 20:35:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354145AbiBCUfW (ORCPT ); Thu, 3 Feb 2022 15:35:22 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:39844 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354175AbiBCUdo (ORCPT ); Thu, 3 Feb 2022 15:33:44 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 164DE61AD1; Thu, 3 Feb 2022 20:33:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69738C340EF; Thu, 3 Feb 2022 20:33:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643920423; bh=Oy4O9eJpPPDoYiB9FaeYRy2AABGKw16p2flSZjl9+1g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fu2GceTCL4qLCV3dxpwzQZ4i18n37irv8/tXe06BWihyBjfsIqRqG/OV/XSoPtrMb ouKTp3g6mCIYQQfMpA+G7kqaOtkDm9aagYRKCiciktNfeWw8U0zJJGQd+PTMNa+Eic L7WPXzgwX7eIsgibZtNF812s0FEnJkczVuGgYJQyj8DdfvkWhLxBzwumwBe6ej/eVQ ivqHgOMRk1eZ9Vp0cFnV4bKIE8bPNGjH4sbq/W4mlHorS83pTQZpXfEur9Q7rHzrPZ ThGU3zh4qg55c9YW2AUOwvN8UrGz5l9/ScL0maV4fIqaRVBp6gkZxxmMNjjU+s3rAK K4FDjX7utUQMA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Saurav Kashyap , Nilesh Javali , "Martin K . Petersen" , Sasha Levin , jhasan@marvell.com, GR-QLogic-Storage-Upstream@marvell.com, jejb@linux.ibm.com, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 26/41] scsi: qedf: Fix refcount issue when LOGO is received during TMF Date: Thu, 3 Feb 2022 15:32:30 -0500 Message-Id: <20220203203245.3007-26-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220203203245.3007-1-sashal@kernel.org> References: <20220203203245.3007-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Saurav Kashyap [ Upstream commit 5239ab63f17cee643bd4bf6addfedebaa7d4f41e ] 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 I/Os hanging with the driver. Fix the ref count. Link: https://lore.kernel.org/r/20220117135311.6256-3-njavali@marvell.com Signed-off-by: Saurav Kashyap Signed-off-by: Nilesh Javali Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- 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 3404782988d58..bb5761ed3f511 100644 --- a/drivers/scsi/qedf/qedf_io.c +++ b/drivers/scsi/qedf/qedf_io.c @@ -2257,6 +2257,7 @@ 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); } -- 2.34.1