From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 2746FC433FF for ; Mon, 29 Jul 2019 20:12:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF997205F4 for ; Mon, 29 Jul 2019 20:12:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564431155; bh=K1bO5Gk86XNoSF6ZVsVtn3ix8y8sXVakZ2UdX4Ob7Kc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XFgs5HiX/L7eJEUt4ZUQSEX4mNMYPn8Rpsde2+lPW7MbOxNZKQ+PwtO9YSCUAeGJ2 lWUZ0Du1axjhTN6xHvmYDqGKb95a68/iGAMONIqK0iUUT3K4yGFq8BerNOpzZw8S1P zlhvWkCL9o/tv1OyWSPbB9G5J3fPvhIGJ83mKBsA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730505AbfG2UMd (ORCPT ); Mon, 29 Jul 2019 16:12:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:44626 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728034AbfG2Tbm (ORCPT ); Mon, 29 Jul 2019 15:31:42 -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 5769621655; Mon, 29 Jul 2019 19:31:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564428701; bh=K1bO5Gk86XNoSF6ZVsVtn3ix8y8sXVakZ2UdX4Ob7Kc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=v87bVCxP8A/pwxP/EmNmuv8c0PwNJjYVXrLUjfm4ptKslf+FepZaf/xdU7cg6Fgrx MRupJMXGtljIM2X5aGVvhIgyNYqAbJJdW2oNFzw32aPR3hDEtR9OZ+WMWDU4Vom5ef 44g3GfR1PoU6GoD16C9/daUorcr+iySmfHipyatU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Aaron Armstrong Skomra , Jason Gerecke , Jiri Kosina Subject: [PATCH 4.14 160/293] HID: wacom: generic: only switch the mode on devices with LEDs Date: Mon, 29 Jul 2019 21:20:51 +0200 Message-Id: <20190729190836.812203072@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729190820.321094988@linuxfoundation.org> References: <20190729190820.321094988@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Aaron Armstrong Skomra commit d8e9806005f28bbb49899dab2068e3359e22ba35 upstream. Currently, the driver will attempt to set the mode on all devices with a center button, but some devices with a center button lack LEDs, and attempting to set the LEDs on devices without LEDs results in the kernel error message of the form: "leds input8::wacom-0.1: Setting an LED's brightness failed (-32)" This is because the generic codepath erroneously assumes that the BUTTON_CENTER usage indicates that the device has LEDs, the previously ignored TOUCH_RING_SETTING usage is a more accurate indication of the existence of LEDs on the device. Fixes: 10c55cacb8b2 ("HID: wacom: generic: support LEDs") Cc: # v4.11+ Signed-off-by: Aaron Armstrong Skomra Reviewed-by: Jason Gerecke Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman --- drivers/hid/wacom_sys.c | 3 +++ drivers/hid/wacom_wac.c | 2 -- drivers/hid/wacom_wac.h | 1 + 3 files changed, 4 insertions(+), 2 deletions(-) --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -118,6 +118,9 @@ static void wacom_feature_mapping(struct u32 n; switch (equivalent_usage) { + case WACOM_HID_WD_TOUCH_RING_SETTING: + wacom->generic_has_leds = true; + break; case HID_DG_CONTACTMAX: /* leave touch_max as is if predefined */ if (!features->touch_max) { --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -1871,8 +1871,6 @@ static void wacom_wac_pad_usage_mapping( features->device_type |= WACOM_DEVICETYPE_PAD; break; case WACOM_HID_WD_BUTTONCENTER: - wacom->generic_has_leds = true; - /* fall through */ case WACOM_HID_WD_BUTTONHOME: case WACOM_HID_WD_BUTTONUP: case WACOM_HID_WD_BUTTONDOWN: --- a/drivers/hid/wacom_wac.h +++ b/drivers/hid/wacom_wac.h @@ -140,6 +140,7 @@ #define WACOM_HID_WD_OFFSETBOTTOM (WACOM_HID_UP_WACOMDIGITIZER | 0x0d33) #define WACOM_HID_WD_DATAMODE (WACOM_HID_UP_WACOMDIGITIZER | 0x1002) #define WACOM_HID_WD_DIGITIZERINFO (WACOM_HID_UP_WACOMDIGITIZER | 0x1013) +#define WACOM_HID_WD_TOUCH_RING_SETTING (WACOM_HID_UP_WACOMDIGITIZER | 0x1032) #define WACOM_HID_UP_G9 0xff090000 #define WACOM_HID_G9_PEN (WACOM_HID_UP_G9 | 0x02) #define WACOM_HID_G9_TOUCHSCREEN (WACOM_HID_UP_G9 | 0x11)