From patchwork Thu Mar 4 19:21:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 12116711 X-Patchwork-Delegate: jikos@jikos.cz 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=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 840A1C43381 for ; Thu, 4 Mar 2021 19:24:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3AE6F64F64 for ; Thu, 4 Mar 2021 19:24:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234242AbhCDTXc (ORCPT ); Thu, 4 Mar 2021 14:23:32 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:37769 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232065AbhCDTXO (ORCPT ); Thu, 4 Mar 2021 14:23:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614885709; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C63cgk8MFkyyc1Dqp4BadNxJmpNJ5ilC36d784rbQlI=; b=Ik97eXn7ljtgT0UGgR6KhleRlTloai9L2L1/Fxgpfkix5trWqgJupokENziWagpeXZhHFD SMHLEldGVCv/On+cPW1VdSmRo5xh8Dag1FgQcTZ6uhiTEy2pyD1Zu6P3eQq5M0z/q5C1R0 GTRb6OBk48Ns8WMGDf5ZcjKHTBSC5OY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-317-5JV2KmmyPY6uB77d8MwzeQ-1; Thu, 04 Mar 2021 14:21:45 -0500 X-MC-Unique: 5JV2KmmyPY6uB77d8MwzeQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 38A9910866A3; Thu, 4 Mar 2021 19:21:44 +0000 (UTC) Received: from x1.localdomain.com (ovpn-114-177.ams2.redhat.com [10.36.114.177]) by smtp.corp.redhat.com (Postfix) with ESMTP id 01F0419CAB; Thu, 4 Mar 2021 19:21:42 +0000 (UTC) From: Hans de Goede To: Jiri Kosina , Benjamin Tissoires , Alexander Kobel Cc: Hans de Goede , linux-input@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= Subject: [PATCH v4 2/9] HID: lenovo: Fix lenovo_led_set_tp10ubkbd() error handling Date: Thu, 4 Mar 2021 20:21:27 +0100 Message-Id: <20210304192134.520919-3-hdegoede@redhat.com> In-Reply-To: <20210304192134.520919-1-hdegoede@redhat.com> References: <20210304192134.520919-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Fix the following issues with lenovo_led_set_tp10ubkbd() error handling: 1. On success hid_hw_raw_request() returns the number of bytes sent. So we should check for (ret != 3) rather then for (ret != 0). 2. Actually propagate errors to the caller. 3. Since the LEDs are part of an USB keyboard-dock the mute LEDs can go away at any time. Don't log an error when ret == -ENODEV and set the LED_HW_PLUGGABLE flag to avoid errors getting logged when the USB gets disconnected. Fixes: bc04b37ea0ec ("HID: lenovo: Add ThinkPad 10 Ultrabook Keyboard support") Reviewed-by: Marek Behún Signed-off-by: Hans de Goede --- Changes in v3: - Return -EIO when hid_hw_raw_request() returns a value != 3 and >= 0 Changes in v2: - Rewrite to fix a bunch of other error-handling issues too --- drivers/hid/hid-lenovo.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c index 4dc5e5f932ed..ee175ab54281 100644 --- a/drivers/hid/hid-lenovo.c +++ b/drivers/hid/hid-lenovo.c @@ -62,8 +62,8 @@ struct lenovo_drvdata { #define TP10UBKBD_LED_OFF 1 #define TP10UBKBD_LED_ON 2 -static void lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code, - enum led_brightness value) +static int lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code, + enum led_brightness value) { struct lenovo_drvdata *data = hid_get_drvdata(hdev); int ret; @@ -75,10 +75,18 @@ static void lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code, data->led_report[2] = value ? TP10UBKBD_LED_ON : TP10UBKBD_LED_OFF; ret = hid_hw_raw_request(hdev, data->led_report[0], data->led_report, 3, HID_OUTPUT_REPORT, HID_REQ_SET_REPORT); - if (ret) - hid_err(hdev, "Set LED output report error: %d\n", ret); + if (ret != 3) { + if (ret != -ENODEV) + hid_err(hdev, "Set LED output report error: %d\n", ret); + + ret = ret < 0 ? ret : -EIO; + } else { + ret = 0; + } mutex_unlock(&data->led_report_mutex); + + return ret; } static void lenovo_tp10ubkbd_sync_fn_lock(struct work_struct *work) @@ -349,7 +357,7 @@ static ssize_t attr_fn_lock_store(struct device *dev, { struct hid_device *hdev = to_hid_device(dev); struct lenovo_drvdata *data = hid_get_drvdata(hdev); - int value; + int value, ret; if (kstrtoint(buf, 10, &value)) return -EINVAL; @@ -364,7 +372,9 @@ static ssize_t attr_fn_lock_store(struct device *dev, lenovo_features_set_cptkbd(hdev); break; case USB_DEVICE_ID_LENOVO_TP10UBKBD: - lenovo_led_set_tp10ubkbd(hdev, TP10UBKBD_FN_LOCK_LED, value); + ret = lenovo_led_set_tp10ubkbd(hdev, TP10UBKBD_FN_LOCK_LED, value); + if (ret) + return ret; break; } @@ -785,6 +795,7 @@ static int lenovo_led_brightness_set(struct led_classdev *led_cdev, struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev); u8 tp10ubkbd_led[] = { TP10UBKBD_MUTE_LED, TP10UBKBD_MICMUTE_LED }; int led_nr = 0; + int ret = 0; if (led_cdev == &data_pointer->led_micmute) led_nr = 1; @@ -799,11 +810,11 @@ static int lenovo_led_brightness_set(struct led_classdev *led_cdev, lenovo_led_set_tpkbd(hdev); break; case USB_DEVICE_ID_LENOVO_TP10UBKBD: - lenovo_led_set_tp10ubkbd(hdev, tp10ubkbd_led[led_nr], value); + ret = lenovo_led_set_tp10ubkbd(hdev, tp10ubkbd_led[led_nr], value); break; } - return 0; + return ret; } static int lenovo_register_leds(struct hid_device *hdev) @@ -825,6 +836,7 @@ static int lenovo_register_leds(struct hid_device *hdev) data->led_mute.name = name_mute; data->led_mute.brightness_get = lenovo_led_brightness_get; data->led_mute.brightness_set_blocking = lenovo_led_brightness_set; + data->led_mute.flags = LED_HW_PLUGGABLE; data->led_mute.dev = &hdev->dev; ret = led_classdev_register(&hdev->dev, &data->led_mute); if (ret < 0) @@ -833,6 +845,7 @@ static int lenovo_register_leds(struct hid_device *hdev) data->led_micmute.name = name_micm; data->led_micmute.brightness_get = lenovo_led_brightness_get; data->led_micmute.brightness_set_blocking = lenovo_led_brightness_set; + data->led_micmute.flags = LED_HW_PLUGGABLE; data->led_micmute.dev = &hdev->dev; ret = led_classdev_register(&hdev->dev, &data->led_micmute); if (ret < 0) {