From patchwork Tue Jun 8 18:27:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 457734 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, 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 ACBB3C49360 for ; Tue, 8 Jun 2021 18:38:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 963BF6141E for ; Tue, 8 Jun 2021 18:38:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235033AbhFHSkM (ORCPT ); Tue, 8 Jun 2021 14:40:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:36824 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235015AbhFHSiC (ORCPT ); Tue, 8 Jun 2021 14:38:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 20FA161417; Tue, 8 Jun 2021 18:33:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623177206; bh=fdPFqJRDPO1FB0/PS/zFRtelqH2WpyZec6vgo0Ak/Wg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xejdt/Uy16Tp4Amc4jdd8+fT0uKK4ludidbKu5445ungsU0Loi9vJowNBF3nVZXpU wJYLAtfXv0N85UE8rzxPXkOsNWnp/BHkShSBs9yXkQkvjrgFsSf+kCtUJH3jDlHPAo vtwijiZi2bRj+PLG60xfXL83m6CGgnaB0k1MtJEo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?utf-8?q?Ahelenia_Ziemia=C5=84ska?= , Benjamin Tissoires , Jiri Kosina Subject: [PATCH 4.19 25/58] HID: multitouch: require Finger field to mark Win8 reports as MT Date: Tue, 8 Jun 2021 20:27:06 +0200 Message-Id: <20210608175933.118963907@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210608175932.263480586@linuxfoundation.org> References: <20210608175932.263480586@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ahelenia Ziemiańska commit a2353e3b26012ff43bcdf81d37a3eaddd7ecdbf3 upstream. This effectively changes collection_is_mt from contact ID in report->field to (device is Win8 => collection is finger) && contact ID in report->field Some devices erroneously report Pen for fingers, and Win8 stylus-on-touchscreen devices report contact ID, but mark the accompanying touchscreen device's collection correctly Cc: stable@vger.kernel.org Signed-off-by: Ahelenia Ziemiańska Acked-by: Benjamin Tissoires Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman --- drivers/hid/hid-multitouch.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -588,9 +588,13 @@ static struct mt_report_data *mt_allocat if (!(HID_MAIN_ITEM_VARIABLE & field->flags)) continue; - for (n = 0; n < field->report_count; n++) { - if (field->usage[n].hid == HID_DG_CONTACTID) - rdata->is_mt_collection = true; + if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) { + for (n = 0; n < field->report_count; n++) { + if (field->usage[n].hid == HID_DG_CONTACTID) { + rdata->is_mt_collection = true; + break; + } + } } }