From patchwork Wed Mar 3 12:13:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 393310 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 367ACC433E9 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 07C9564E5F for ; Thu, 4 Mar 2021 00:28:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232772AbhCDA1S (ORCPT ); Wed, 3 Mar 2021 19:27:18 -0500 Received: from mga06.intel.com ([134.134.136.31]:61841 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1444678AbhCCMPn (ORCPT ); Wed, 3 Mar 2021 07:15:43 -0500 IronPort-SDR: P+ZQhKbvpiuu9vOMaI6mirN65tX4nqfayCUlh8FYpwlsEhtoZdp+jS00huOsMjn3viFVa2VBhM G8FkiHOjDkzg== X-IronPort-AV: E=McAfee;i="6000,8403,9911"; a="248585374" X-IronPort-AV: E=Sophos;i="5.81,219,1610438400"; d="scan'208";a="248585374" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Mar 2021 04:13:12 -0800 IronPort-SDR: +NietHrzMBM2rKTsW6Gn7aq9fdeBxhBXfagqUbOKVjWKkNSTQHAzzrpDKKk+tWxLDFMUOH5dw+ W3fO5YSMt3Qw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,219,1610438400"; d="scan'208";a="373959470" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga007.fm.intel.com with ESMTP; 03 Mar 2021 04:13:10 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id 5E313103; 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 2/2] thunderbolt: Increase runtime PM reference count on DP tunnel discovery Date: Wed, 3 Mar 2021 15:13:10 +0300 Message-Id: <20210303121310.80937-2-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210303121310.80937-1-mika.westerberg@linux.intel.com> References: <20210303121310.80937-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org If the driver is unbound and then bound back it goes over the topology and figure out the existing tunnels. However, if it finds DP tunnel it should make sure the domain does not runtime suspend as otherwise it will tear down the DP tunnel unexpectedly. Fixes: 6ac6faee5d7d ("thunderbolt: Add runtime PM for Software CM") Cc: stable@vger.kernel.org Signed-off-by: Mika Westerberg --- drivers/thunderbolt/tb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index 1f000ac1728b..c348b1fc0efc 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -138,6 +138,10 @@ static void tb_discover_tunnels(struct tb_switch *sw) parent->boot = true; parent = tb_switch_parent(parent); } + } else if (tb_tunnel_is_dp(tunnel)) { + /* Keep the domain from powering down */ + pm_runtime_get_sync(&tunnel->src_port->sw->dev); + pm_runtime_get_sync(&tunnel->dst_port->sw->dev); } list_add_tail(&tunnel->list, &tcm->tunnel_list);