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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4462ECAAD4 for ; Tue, 30 Aug 2022 11:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231250AbiH3LlQ (ORCPT ); Tue, 30 Aug 2022 07:41:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230444AbiH3Lki (ORCPT ); Tue, 30 Aug 2022 07:40:38 -0400 Received: from relay12.mail.gandi.net (relay12.mail.gandi.net [217.70.178.232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CED2786042; Tue, 30 Aug 2022 04:39:15 -0700 (PDT) Received: (Authenticated sender: hadess@hadess.net) by mail.gandi.net (Postfix) with ESMTPSA id C991120000F; Tue, 30 Aug 2022 11:39:12 +0000 (UTC) From: Bastien Nocera To: linux-input@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Jiri Kosina , Benjamin Tissoires , "Peter F . Patel-Schneider" , =?UTF-8?q?Filipe=20La=C3=ADns?= , Nestor Lopez Casado Subject: [v3 4/5] HID: logitech-hidpp: Fix "Sw. Id." for HID++ 2.0 commands Date: Tue, 30 Aug 2022 13:39:06 +0200 Message-Id: <20220830113907.4886-4-hadess@hadess.net> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220830113907.4886-1-hadess@hadess.net> References: <20220830113907.4886-1-hadess@hadess.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Always set a non-zero "Sw. Id." in the lower nibble of the Function/ASE and Software Identifier byte in HID++ 2.0 commands. As per the "Protocol HID++2.0 essential features" section in https://lekensteyn.nl/files/logitech/logitech_hidpp_2.0_specification_draft_2012-06-04.pdf " Software identifier (4 bits, unsigned) A number uniquely defining the software that sends a request. The firmware must copy the software identifier in the response but does not use it in any other ways. 0 Do not use (allows to distinguish a notification from a response). " Link: https://bugzilla.kernel.org/show_bug.cgi?id=215699 Signed-off-by: Bastien Nocera --- drivers/hid/hid-logitech-hidpp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 98ebedb73d98..9c8088d8879e 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -41,6 +41,9 @@ module_param(disable_tap_to_click, bool, 0644); MODULE_PARM_DESC(disable_tap_to_click, "Disable Tap-To-Click mode reporting for touchpads (only on the K400 currently)."); +/* Define a non-zero software ID to identify our own requests */ +#define LINUX_KERNEL_SW_ID 0x06 + #define REPORT_ID_HIDPP_SHORT 0x10 #define REPORT_ID_HIDPP_LONG 0x11 #define REPORT_ID_HIDPP_VERY_LONG 0x12 @@ -343,7 +346,7 @@ static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp, else message->report_id = REPORT_ID_HIDPP_LONG; message->fap.feature_index = feat_index; - message->fap.funcindex_clientid = funcindex_clientid; + message->fap.funcindex_clientid = funcindex_clientid | LINUX_KERNEL_SW_ID; memcpy(&message->fap.params, params, param_count); ret = hidpp_send_message_sync(hidpp, message, response); -- 2.37.2