From patchwork Tue Apr 5 07:26:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 557008 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 249F7C433FE for ; Tue, 5 Apr 2022 11:21:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359484AbiDELT1 (ORCPT ); Tue, 5 Apr 2022 07:19:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349195AbiDEJt0 (ORCPT ); Tue, 5 Apr 2022 05:49:26 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C008D22298; Tue, 5 Apr 2022 02:42:32 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 6B5D6B81C19; Tue, 5 Apr 2022 09:42:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C63F7C385A2; Tue, 5 Apr 2022 09:42:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649151750; bh=qQkG5DprhOohE/vv7FqAicjZ5OSnoUow72LwglFkNNY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0Dc4Ft3UeDWFQS6/Xrj5FpgY37SKUhDEE7y6c42DLkBNvNurmoyLzgG9UTRy0RDO9 0i/8SMbt6brF/1msNO1+W4o0mzoozLiwZT4rGeYCY6fyR++n2Uaz987yQBXGz21OYK OECSiL8O/17DwOFwgxrlNYh7o1XZLtqBGGjnTRJY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, TOTE Robot , Jia-Ju Bai , Hans de Goede , Sasha Levin Subject: [PATCH 5.15 527/913] platform/x86: huawei-wmi: check the return value of device_create_file() Date: Tue, 5 Apr 2022 09:26:29 +0200 Message-Id: <20220405070355.648455368@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070339.801210740@linuxfoundation.org> References: <20220405070339.801210740@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jia-Ju Bai [ Upstream commit c91a5b1c221a58d008485cf7d02ccce73108b119 ] The function device_create_file() in huawei_wmi_battery_add() can fail, so its return value should be checked. Fixes: 355a070b09ab ("platform/x86: huawei-wmi: Add battery charging thresholds") Reported-by: TOTE Robot Signed-off-by: Jia-Ju Bai Link: https://lore.kernel.org/r/20220303022421.313-1-baijiaju1990@gmail.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede Signed-off-by: Sasha Levin --- drivers/platform/x86/huawei-wmi.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c index a2d846c4a7ee..eac3e6b4ea11 100644 --- a/drivers/platform/x86/huawei-wmi.c +++ b/drivers/platform/x86/huawei-wmi.c @@ -470,10 +470,17 @@ static DEVICE_ATTR_RW(charge_control_thresholds); static int huawei_wmi_battery_add(struct power_supply *battery) { - device_create_file(&battery->dev, &dev_attr_charge_control_start_threshold); - device_create_file(&battery->dev, &dev_attr_charge_control_end_threshold); + int err = 0; - return 0; + err = device_create_file(&battery->dev, &dev_attr_charge_control_start_threshold); + if (err) + return err; + + err = device_create_file(&battery->dev, &dev_attr_charge_control_end_threshold); + if (err) + device_remove_file(&battery->dev, &dev_attr_charge_control_start_threshold); + + return err; } static int huawei_wmi_battery_remove(struct power_supply *battery)