From patchwork Wed Mar 3 12:13:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 394146 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27779C433E6 for ; Thu, 4 Mar 2021 00:28:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E6E3C64E62 for ; Thu, 4 Mar 2021 00:28:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237845AbhCDA1R (ORCPT ); Wed, 3 Mar 2021 19:27:17 -0500 Received: from mga09.intel.com ([134.134.136.24]:25628 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1443655AbhCCMO7 (ORCPT ); Wed, 3 Mar 2021 07:14:59 -0500 IronPort-SDR: rY9xXrA/m07oLD9H7pqXDEv+liEO2rab+A8tqZu14fUgbtjbt9aw/UmKaupqy/1efCtXOIAH0h VE0ZyCqV7lDA== X-IronPort-AV: E=McAfee;i="6000,8403,9911"; a="187299463" X-IronPort-AV: E=Sophos;i="5.81,219,1610438400"; d="scan'208";a="187299463" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Mar 2021 04:13:12 -0800 IronPort-SDR: UnOimma7BB3u0E0a0Q9LIEAUJe9TMZIwRWSI0eFasLpu4uRFm66mNHoxHsWuZ3ArD3L8Akawtw coJuHLLH9ikA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,219,1610438400"; d="scan'208";a="586338810" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga005.jf.intel.com with ESMTP; 03 Mar 2021 04:13:10 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id 5227F128; Wed, 3 Mar 2021 14:13:10 +0200 (EET) From: Mika Westerberg To: linux-usb@vger.kernel.org Cc: Michael Jamet , Yehezkel Bernat , Andreas Noever , Mika Westerberg , Chiranjeevi Rapolu , Lukas Wunner Subject: [PATCH 1/2] thunderbolt: Initialize HopID IDAs in tb_switch_alloc() Date: Wed, 3 Mar 2021 15:13:09 +0300 Message-Id: <20210303121310.80937-1-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org If there is a failure before the tb_switch_add() is called the switch object is released by tb_switch_release() but at that point HopID IDAs have not yet been initialized. So we see splat like this: BUG: spinlock bad magic on CPU#2, kworker/u8:5/115 ... Workqueue: thunderbolt0 tb_handle_hotplug Call Trace: dump_stack+0x97/0xdc ? spin_bug+0x9a/0xa7 do_raw_spin_lock+0x68/0x98 _raw_spin_lock_irqsave+0x3f/0x5d ida_destroy+0x4f/0x127 tb_switch_release+0x6d/0xfd device_release+0x2c/0x7d kobject_put+0x9b/0xbc tb_handle_hotplug+0x278/0x452 process_one_work+0x1db/0x396 worker_thread+0x216/0x375 kthread+0x14d/0x155 ? pr_cont_work+0x58/0x58 ? kthread_blkcg+0x2e/0x2e ret_from_fork+0x1f/0x40 Fix this by always initializing HopID IDAs in tb_switch_alloc(). Fixes: 0b2863ac3cfd ("thunderbolt: Add functions for allocating and releasing HopIDs") Cc: stable@vger.kernel.org Reported-by: Chiranjeevi Rapolu Signed-off-by: Mika Westerberg --- drivers/thunderbolt/switch.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index b63fecca6c2a..2a95b4ce06c0 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -768,12 +768,6 @@ static int tb_init_port(struct tb_port *port) tb_dump_port(port->sw->tb, &port->config); - /* Control port does not need HopID allocation */ - if (port->port) { - ida_init(&port->in_hopids); - ida_init(&port->out_hopids); - } - INIT_LIST_HEAD(&port->list); return 0; @@ -1842,10 +1836,8 @@ static void tb_switch_release(struct device *dev) dma_port_free(sw->dma_port); tb_switch_for_each_port(sw, port) { - if (!port->disabled) { - ida_destroy(&port->in_hopids); - ida_destroy(&port->out_hopids); - } + ida_destroy(&port->in_hopids); + ida_destroy(&port->out_hopids); } kfree(sw->uuid); @@ -2025,6 +2017,12 @@ struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent, /* minimum setup for tb_find_cap and tb_drom_read to work */ sw->ports[i].sw = sw; sw->ports[i].port = i; + + /* Control port does not need HopID allocation */ + if (i) { + ida_init(&sw->ports[i].in_hopids); + ida_init(&sw->ports[i].out_hopids); + } } ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_PLUG_EVENTS);