From patchwork Thu Jan 13 23:24:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Meneghini X-Patchwork-Id: 531960 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 6A391C433F5 for ; Thu, 13 Jan 2022 23:25:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238197AbiAMXZ0 (ORCPT ); Thu, 13 Jan 2022 18:25:26 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:35018 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235310AbiAMXZZ (ORCPT ); Thu, 13 Jan 2022 18:25:25 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1642116324; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=/cYjdYc1cOu2NaGMgT2On4jE9UFJ7SNdWKgu/5ofk7U=; b=hjHdGyk7Bk3gEdwJQrys2TNLZljqpAvByHzZa+mPduYomFtChlNmNr21eJywMgZSPaNsAF hZzCDQlTXB+7r95ZFud7Z6GuCtULzaCKJo5IrIN3XNHZoWYXA0pxx7mevTVYVs5lYL9mQN aW2pUtYGngjQhv7wx9oJ6jPZ7e5Hv+c= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-516-R0N9NBi0MV28KfAFG6CeqQ-1; Thu, 13 Jan 2022 18:25:21 -0500 X-MC-Unique: R0N9NBi0MV28KfAFG6CeqQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8F1121083F66; Thu, 13 Jan 2022 23:25:20 +0000 (UTC) Received: from jmeneghi.bos.com (unknown [10.22.17.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4E87F1042A9C; Thu, 13 Jan 2022 23:25:14 +0000 (UTC) From: John Meneghini To: linux-scsi@vger.kernel.org Cc: linux-kernel@vger.kernel.org, GR-QLogic-Storage-Upstream@marvell.com, mlombard@redhat.com, skashyap@marvell.com Subject: [PATCH] scsi: bnx2fc: flush destroy_work queue before calling bnx2fc_interface_put Date: Thu, 13 Jan 2022 18:24:56 -0500 Message-Id: <20220113232456.230749-1-jmeneghi@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The bnx2fc_destroy functions are removing the interface before calling destroy_work. This results multiple WARNings from sysfs_remove_group as the controller rport device attributes are removed to early. The problem is easily reproducible with the following steps. Example: $ dmesg -w & $ systemctl enable --now fcoe $ fipvlan -s -c ens2f1 $ fcoeadm -d ens2f1.802 [ 583.464488] host2: libfc: Link down on port (7500a1) [ 583.472651] bnx2fc: 7500a1 - rport not created Yet!! [ 583.490468] ------------[ cut here ]------------ [ 583.538725] sysfs group 'power' not found for kobject 'rport-2:0-0' [ 583.568814] WARNING: CPU: 3 PID: 192 at fs/sysfs/group.c:279 sysfs_remove_group+0x6f/0x80 [ 583.607130] Modules linked in: dm_service_time 8021q garp mrp stp llc bnx2fc cnic uio rpcsec_gss_krb5 auth_rpcgss nfsv4 ... [ 583.942994] CPU: 3 PID: 192 Comm: kworker/3:2 Kdump: loaded Not tainted 5.14.0-39.el9.x86_64 #1 [ 583.984105] Hardware name: HP ProLiant DL120 G7, BIOS J01 07/01/2013 [ 584.016535] Workqueue: fc_wq_2 fc_rport_final_delete [scsi_transport_fc] [ 584.050691] RIP: 0010:sysfs_remove_group+0x6f/0x80 [ 584.074725] Code: ff 5b 48 89 ef 5d 41 5c e9 ee c0 ff ff 48 89 ef e8 f6 b8 ff ff eb d1 49 8b 14 24 48 8b 33 48 c7 c7 ... [ 584.162586] RSP: 0018:ffffb567c15afdc0 EFLAGS: 00010282 [ 584.188225] RAX: 0000000000000000 RBX: ffffffff8eec4220 RCX: 0000000000000000 [ 584.221053] RDX: ffff8c1586ce84c0 RSI: ffff8c1586cd7cc0 RDI: ffff8c1586cd7cc0 [ 584.255089] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffb567c15afc00 [ 584.287954] R10: ffffb567c15afbf8 R11: ffffffff8fbe7f28 R12: ffff8c1486326400 [ 584.322356] R13: ffff8c1486326480 R14: ffff8c1483a4a000 R15: 0000000000000004 [ 584.355379] FS: 0000000000000000(0000) GS:ffff8c1586cc0000(0000) knlGS:0000000000000000 [ 584.394419] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 584.421123] CR2: 00007fe95a6f7840 CR3: 0000000107674002 CR4: 00000000000606e0 [ 584.454888] Call Trace: [ 584.466108] device_del+0xb2/0x3e0 [ 584.481701] device_unregister+0x13/0x60 [ 584.501306] bsg_unregister_queue+0x5b/0x80 [ 584.522029] bsg_remove_queue+0x1c/0x40 [ 584.541884] fc_rport_final_delete+0xf3/0x1d0 [scsi_transport_fc] [ 584.573823] process_one_work+0x1e3/0x3b0 [ 584.592396] worker_thread+0x50/0x3b0 [ 584.609256] ? rescuer_thread+0x370/0x370 [ 584.628877] kthread+0x149/0x170 [ 584.643673] ? set_kthread_struct+0x40/0x40 [ 584.662909] ret_from_fork+0x22/0x30 [ 584.680002] ---[ end trace 53575ecefa942ece ]--- Signed-off-by: John Meneghini Signed-off-by: Maurizio Lombardi --- drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index 71fa62bd3083..6e7e40e8ce4a 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -1215,8 +1215,10 @@ static int bnx2fc_vport_destroy(struct fc_vport *vport) mutex_unlock(&n_port->lp_mutex); bnx2fc_free_vport(interface->hba, port->lport); bnx2fc_port_shutdown(port->lport); - bnx2fc_interface_put(interface); queue_work(bnx2fc_wq, &port->destroy_work); + flush_work(&port->destroy_work); + bnx2fc_interface_put(interface); + return 0; } @@ -1653,8 +1655,9 @@ static void __bnx2fc_destroy(struct bnx2fc_interface *interface) bnx2fc_interface_cleanup(interface); bnx2fc_stop(interface); list_del(&interface->list); - bnx2fc_interface_put(interface); queue_work(bnx2fc_wq, &port->destroy_work); + flush_work(&port->destroy_work); + bnx2fc_interface_put(interface); } /**