From patchwork Fri Jun 19 14:31:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 224141 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,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 03754C433E0 for ; Fri, 19 Jun 2020 15:09:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D7B6A21BE5 for ; Fri, 19 Jun 2020 15:09:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592579348; bh=IAEpftuEgs7V9lricUgp8vMtOl5jcTrUca3ypizERdI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=hewQDZUM4JtfC7vl5y/JktZ2PRxSF0V9JRBpaPelAeBkiUiphXlC6v94d8XCsKoXK x7EvJP2Rg5QRnp4b43HwBOiXw6VlFmYx/Tr6XNjmNHglXLIps1sRya8PiTrid5lDb/ E0TkE9pZ+mlsdLwH2pTiJC4ktAkuIDBKnCuMHETE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391852AbgFSPJI (ORCPT ); Fri, 19 Jun 2020 11:09:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:38740 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391842AbgFSPJG (ORCPT ); Fri, 19 Jun 2020 11:09:06 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 45DCD21941; Fri, 19 Jun 2020 15:09:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592579345; bh=IAEpftuEgs7V9lricUgp8vMtOl5jcTrUca3ypizERdI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J/VCwXehOxvxW9FCrAWhDpCLUHtIVWSat8Cq65qfqIyItbJPorjoDemzs0ZMJu8vK hB9LLkbcOfNmsmPbmk/d9f3z1xeIIOBwd9BpnY+A2P+k7yYxDFWRJU1gyN7SyoTFVo xkDZehI/IC4o0GjNjP8g9jMg2dwal+w3VrgZ31Kg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans de Goede , Andy Shevchenko , Sasha Levin Subject: [PATCH 5.4 101/261] platform/x86: intel-vbtn: Do not advertise switches to userspace if they are not there Date: Fri, 19 Jun 2020 16:31:52 +0200 Message-Id: <20200619141654.695220610@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141649.878808811@linuxfoundation.org> References: <20200619141649.878808811@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hans de Goede [ Upstream commit 990fbb48067bf8cfa34b7d1e6e1674eaaef2f450 ] Commit de9647efeaa9 ("platform/x86: intel-vbtn: Only activate tablet mode switch on 2-in-1's") added a DMI chassis-type check to avoid accidentally reporting SW_TABLET_MODE = 1 to userspace on laptops (specifically on the Dell XPS 9360), to avoid e.g. userspace ignoring touchpad events because userspace thought the device was in tablet-mode. But if we are not getting the initial status of the switch because the device does not have a tablet mode, then we really should not advertise the presence of a tablet-mode switch to userspace at all, as userspace may use the mere presence of this switch for certain heuristics. Fixes: de9647efeaa9 ("platform/x86: intel-vbtn: Only activate tablet mode switch on 2-in-1's") Signed-off-by: Hans de Goede Signed-off-by: Andy Shevchenko Signed-off-by: Sasha Levin --- drivers/platform/x86/intel-vbtn.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index 2ab3dbd26b5e..ab33349035b1 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -54,6 +54,7 @@ static const struct key_entry intel_vbtn_switchmap[] = { struct intel_vbtn_priv { struct key_entry keymap[KEYMAP_LEN]; struct input_dev *input_dev; + bool has_switches; bool wakeup_mode; }; @@ -69,7 +70,7 @@ static int intel_vbtn_input_setup(struct platform_device *device) keymap_len += ARRAY_SIZE(intel_vbtn_keymap); } - if (true) { + if (priv->has_switches) { memcpy(&priv->keymap[keymap_len], intel_vbtn_switchmap, ARRAY_SIZE(intel_vbtn_switchmap) * sizeof(struct key_entry)); @@ -137,16 +138,12 @@ out_unknown: static void detect_tablet_mode(struct platform_device *device) { - const char *chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE); struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev); acpi_handle handle = ACPI_HANDLE(&device->dev); unsigned long long vgbs; acpi_status status; int m; - if (!(chassis_type && strcmp(chassis_type, "31") == 0)) - return; - status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs); if (ACPI_FAILURE(status)) return; @@ -157,6 +154,19 @@ static void detect_tablet_mode(struct platform_device *device) input_report_switch(priv->input_dev, SW_DOCK, m); } +static bool intel_vbtn_has_switches(acpi_handle handle) +{ + const char *chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE); + unsigned long long vgbs; + acpi_status status; + + if (!(chassis_type && strcmp(chassis_type, "31") == 0)) + return false; + + status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs); + return ACPI_SUCCESS(status); +} + static int intel_vbtn_probe(struct platform_device *device) { acpi_handle handle = ACPI_HANDLE(&device->dev); @@ -175,13 +185,16 @@ static int intel_vbtn_probe(struct platform_device *device) return -ENOMEM; dev_set_drvdata(&device->dev, priv); + priv->has_switches = intel_vbtn_has_switches(handle); + err = intel_vbtn_input_setup(device); if (err) { pr_err("Failed to setup Intel Virtual Button\n"); return err; } - detect_tablet_mode(device); + if (priv->has_switches) + detect_tablet_mode(device); status = acpi_install_notify_handler(handle, ACPI_DEVICE_NOTIFY,