From patchwork Wed Mar 2 22:07:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 547752 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 1A26DC4332F for ; Wed, 2 Mar 2022 22:09:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243711AbiCBWK1 (ORCPT ); Wed, 2 Mar 2022 17:10:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239783AbiCBWKY (ORCPT ); Wed, 2 Mar 2022 17:10:24 -0500 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (mail-mw2nam12on2082.outbound.protection.outlook.com [40.107.244.82]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2427AC9A1E; Wed, 2 Mar 2022 14:09:23 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Ie2AJ8/FTeniFcDKKcP8S8mT4a4WyBHeNpMxAP9y1WDgDdjFpgs2WrKGqMM3M9jIwi1t0VaPkIB+LuqJiwBH54qabH9TrmISYkrCYp8Y/sdBPprpWj0NXoNO75aJ9YxYgCcCMgx7DEUCxwkh9y8ZQHNy0S7/bNjqMznk6/KU5rpIbIey8qh8zD8RyvSDqb1XHNEvACLLd3LBPpIcca8snlhcEOPeROZGKUFOSdJLKoEpkvwFqLrBUgwjjHeXxBmiXzMT2mV9P3O4joxt3v74bTMJ5ar812sQvbEQewzVBzrhkRcws6XEX4Dks+LmHHz/15pTjObbwByvuoaWoKPu3Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=zCqrZxd0x4LHePB1u+6qaISBjHoGsYqMHfzHZnmCBVg=; b=JBXmyJdjFCcwJsK92pPWeuv6r2B9lObehuQ1NsTE4LejWctOs5U0leWM2cKph5xNx7ES3jDzby2z0ofRRaFLMhxOED5obbwGQAPr5w7bf901hCg7Q/YazLQfoImiOGG41yaXdAlZ1GH0Wj6ul/FqHT93muZEV4IYavqg0Qmh/knhbkc3/g9VWh+GdxRDs8sGX02qYHHG+Alz7rkYdTnTAXLgUsZPyeQ4cIo41CBqY88sJzguArJ0/1XcIWDfzcT8NEe60PEDdCiIbprDgHFPbJ8MlgEl4nkXWT1Slpn04TL4P9LZhUdZbI6KIg/FpwNfO8JzzP/E6H5mUeZ6nZ1jNA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=linux.intel.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=zCqrZxd0x4LHePB1u+6qaISBjHoGsYqMHfzHZnmCBVg=; b=sVKb3mq6wRwO5DFz0XbKB4mPgnnQd40JV56DLpePuLgO2ZMBPvhsTIUXqv8LSxEHYQu38eP9aImEArfAIZfNVqaVl4w+zLl95E9sDi9imVMNLBdmuIyEbfsxkajy0xgyHEaiVq98aIbMMuO7ZUb6tf2j0NzQDE26lwnzge+Ye14= Received: from BN6PR22CA0037.namprd22.prod.outlook.com (2603:10b6:404:37::23) by BN8PR12MB3524.namprd12.prod.outlook.com (2603:10b6:408:68::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5038.14; Wed, 2 Mar 2022 22:09:20 +0000 Received: from BN8NAM11FT044.eop-nam11.prod.protection.outlook.com (2603:10b6:404:37:cafe::b1) by BN6PR22CA0037.outlook.office365.com (2603:10b6:404:37::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5038.14 via Frontend Transport; Wed, 2 Mar 2022 22:09:20 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; Received: from SATLEXMB04.amd.com (165.204.84.17) by BN8NAM11FT044.mail.protection.outlook.com (10.13.177.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5038.14 via Frontend Transport; Wed, 2 Mar 2022 22:09:20 +0000 Received: from localhost.localdomain (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Wed, 2 Mar 2022 16:09:18 -0600 From: Mario Limonciello To: Mika Westerberg CC: "open list:THUNDERBOLT DRIVER" , , , Mario Limonciello Subject: [PATCH 2/5] drivers/thunderbolt: don't resume switches without uid set Date: Wed, 2 Mar 2022 16:07:06 -0600 Message-ID: <20220302220709.3138846-2-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220302220709.3138846-1-mario.limonciello@amd.com> References: <20220302220709.3138846-1-mario.limonciello@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: b88c5a6b-ed1e-45de-7831-08d9fc994d18 X-MS-TrafficTypeDiagnostic: BN8PR12MB3524:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: BwAE/BQsGYJ7cXf0PbsQVY3TdnnxNALTakd+wWLSUz3P/8T48TdYyIAzNELp6NxSv8QKmC+WSTUQz7hDDwNK74bE0tO2LSHyc5Lz2Q0Ws4qGBLWAsvk3M0xPIOSSvZppkQk2wBs1mQ4IZbQ4SA9KlMGMCCSpM90ktO+D2aGaw1OHfxSkkugDYOfcI/q9poBi7VOx9cUhdcJqY/cml9rlK3MGQ52UubQ5gncY38b6BLhf59Kot0ND7MmPgOyHg0k5+v7Sxc4uv2jXluI1x4sCCKm/Hdeu0j8/cC7kw8YXGvD1h9wtuP3K5lC/IdtTfvW57qDlqLdopZIC9ah9mU+YegwmUI/RbeKqDBcxiuHfaXSao3h4FhLDmIWnX46XsYKLCg6LH4ApSIHNNROm1R+R47kZ0FwMW5IJmx63W/8uKMnRORNzv80rO+HjcJ5DtwdxoZEH5x+x/7drnu0YhF1nuzjGgrVd3zi4/SdABk200KODQrwnxV+UqAtQdDqA5/Op9id6CaNLdM2hwtm1dm+0t2dyV5mz3Eo/RW6x1rWTB06tSZekh9zhSQWJkBlHLIbT/xvbv8kKlWGemjzMRDydPMZhd0GC4tY9jzgX9K76GAjni/FocySRtvHFEo6p2K0BiojhYWderDiYe1LAkE6BzPDSj+CC4Uca9TIiOeQUmWJrXRFAZaNiBcV+SxLtYl2SCDDw72H875DDVXaAkns04g== X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230001)(4636009)(40470700004)(36840700001)(46966006)(1076003)(36756003)(36860700001)(426003)(336012)(54906003)(6916009)(44832011)(2906002)(83380400001)(16526019)(47076005)(2616005)(8936002)(26005)(6666004)(5660300002)(186003)(316002)(82310400004)(508600001)(4326008)(81166007)(356005)(86362001)(70586007)(8676002)(70206006)(40460700003)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Mar 2022 22:09:20.2499 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b88c5a6b-ed1e-45de-7831-08d9fc994d18 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT044.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR12MB3524 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Switches might not have a uid set if the DROM read failed during initialization previously. Normally upon resume the uid is re-read to confirm it's the same device connected. * If the DROM read failed during init but then succeeded during resume it could either be a new device or faulty device * If the DROM read failed during init and also failed during resume it might be a different device plugged in all together. Detect this situation and prevent re-using the same configuration in these cirucmstances. Signed-off-by: Mario Limonciello --- drivers/thunderbolt/switch.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index b5fb3e76ed09..294518af4ee4 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -2980,6 +2980,10 @@ int tb_switch_resume(struct tb_switch *sw) return err; } + /* We don't have any way to confirm this was the same device */ + if (!sw->uid) + return -ENODEV; + if (tb_switch_is_usb4(sw)) err = usb4_switch_read_uid(sw, &uid); else