Received: by 2002:ab2:3319:0:b0:1ef:7a0f:c32d with SMTP id i25csp393343lqc; Fri, 8 Mar 2024 00:01:40 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCXflO9uCg7iw7imMkgC92Jsgp65uTFYJUzagpo7+hYL0N6tJeABhzYPV07HTG7uDgtibI1D1IWLF49iIJw5dk//LqB1G8vdn9PyO/zsSQ== X-Google-Smtp-Source: AGHT+IGbaclnLIyjstZ3UHcNtZfOQMgE/bQsaAlVw3/FkaMngIdzuyYn/6iWFur6bLvSQNcZ8+Er X-Received: by 2002:a05:6a20:1aa4:b0:1a1:51b3:b1c4 with SMTP id ci36-20020a056a201aa400b001a151b3b1c4mr9169814pzb.56.1709884899598; Fri, 08 Mar 2024 00:01:39 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709884899; cv=pass; d=google.com; s=arc-20160816; b=Sre8qpcbqJ3vNxLM6C/IA2SShV+lQPUQ1AJmnTDHxpTVYU1j47lj2gfgXgyVMCT6L9 COuQ8LuA3+wxNvDEuW/PcQVYZ4EIA23lIAYYD3o3pBERC7PeK8r96Vc4KQj4kBKYVIoP Cs2D57zEJ7TiPqPOy1/Oi7u/JRGENB5rswDJsQx/YpVOmAhASf0MMBueLNmAPbnYhThR 1Dg7f6fq5u1zx8tWFfApA1cXTSImiUKKK6cHC0NudFrZlAJn+HvJSoPqOiQ+dFEqZcts uQqx2hSK90M7upWHNTrtWwAiBnLHJDNz2fwxp1JbNa8nebMcNVmFUmsn0X9J/Ccn/9yl frhw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:list-unsubscribe:list-subscribe:list-id:precedence :references:message-id:in-reply-to:subject:cc:to:date:from :dkim-signature; bh=Dn4ngkimyWxK0GWatkp2RcvvpTUJI8muVMWGjHVcSss=; fh=STyY72QLAnH9AHhshgeRhKcS+mUqSMwLvT8GKwzxL60=; b=ZIFRoSpDa4MibXNYMztxwSSwPIS9YJldmGiW7CrgG23V5KRr9LDTXSsu9a0zsncLMT LUfsCHP362XTB3efzJ/tsKcZ8B3gCLaKuBc3JydNJuviy+XW4UH2d8N82CEap/Y9smF+ g91/2pW3xSVd2K3ugimmVt2uw1moCW4jbgk5uLJQd4koK/QNKOrKe1NOejHEKKpAecN5 5SDzMMJSw/BN48lhskblwc3jSwjJy5iRlWYl3rN8BTbhPtCFCuTP9dzGlBnW+hcAO+VP SZs6FXcklQCMaTMcuRZsh9YGRs7YqTl7R2FbuyWhOJ1h/Yuu4MAaAJVC2a1zdens9mVY 9MVQ==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=oFxDBR3u; arc=pass (i=1 dkim=pass dkdomain=intel.com dmarc=pass fromdomain=linux.intel.com); spf=pass (google.com: domain of linux-kernel+bounces-96618-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-96618-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [139.178.88.99]) by mx.google.com with ESMTPS id jo6-20020a056a00908600b006e653e33a50si3985760pfb.49.2024.03.08.00.01.39 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Mar 2024 00:01:39 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-96618-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=oFxDBR3u; arc=pass (i=1 dkim=pass dkdomain=intel.com dmarc=pass fromdomain=linux.intel.com); spf=pass (google.com: domain of linux-kernel+bounces-96618-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-96618-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 49BEB2845B6 for ; Fri, 8 Mar 2024 08:01:39 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 4283E524B2; Fri, 8 Mar 2024 08:01:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="oFxDBR3u" Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 54CC24F61D; Fri, 8 Mar 2024 08:01:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.8 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709884876; cv=none; b=Ew+no0YoWok8kPHD7+LS+ppWbv3TNMQzetaiuNq63uHYiWdHI2/FTMMCW2xVCb//rGEoNQs8Ov1RwA9PEm8/lXrhu40Esbl9X6TDd/XOkHaYN6wkScBZRQO8J8DftPfrQETx373jlsRuYSzqdfneDdYwSAjdUC0DRW1skQcgyKE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709884876; c=relaxed/simple; bh=ioKP+FCr73IWPP6an5pqKpjOX6aJDfsCIfbs7bCOtM4=; h=From:Date:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=k76NZPfkfAi6sUK6e6ptyiaHqm1fkxOHYyku1HzO+/RYtzKWjPpmhaynI6paY3KD2aDAUwhswsykPHP69J7BMWKDWG/AflR79bYGiBvJ30R+odOmfQJwKBRIRhGkklvzJ5cdNu9xIYvvrugUUitVDkzD4/RxlGpp4HtQI3k3HYM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=oFxDBR3u; arc=none smtp.client-ip=192.198.163.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709884875; x=1741420875; h=from:date:to:cc:subject:in-reply-to:message-id: references:mime-version; bh=ioKP+FCr73IWPP6an5pqKpjOX6aJDfsCIfbs7bCOtM4=; b=oFxDBR3uFBt1q5ukkI/g+DqSRm3tD9qyF56RJlHCMb9ot9/zN4uuHMqc +cwlEb/Q6WDE5x+Q4dBHb+CRk3D8TEb+tQWEmmbtsxlF1piphOzAjOd2Q tcG1k87Wy1WJaJrnkhE481hBlSvcUUfWzvJq9nJagReHfA9fFAsHYpxUu 9nkeWASFsnIyFwEJEzjhgAQEuQTGuFX2ymRg5vSKIRacSC0lLZocWpNY6 +V1fS7HNZvDdNpK7pE7yYFeLPUVrw1DYaC1wsatUXZF1jEutY5XWXs+At Jrg7+xJ0Qv0SXSrcoNcpSRtNbb2GKEd+F+8VHYBLoJVAOajH9haDZaCK/ g==; X-IronPort-AV: E=McAfee;i="6600,9927,11006"; a="22119413" X-IronPort-AV: E=Sophos;i="6.07,108,1708416000"; d="scan'208";a="22119413" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2024 00:01:14 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,108,1708416000"; d="scan'208";a="10267075" Received: from ijarvine-desk1.ger.corp.intel.com (HELO localhost) ([10.245.244.186]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2024 00:01:11 -0800 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 8 Mar 2024 10:01:05 +0200 (EET) To: Armin Wolf cc: Hans de Goede , "Rafael J. Wysocki" , lenb@kernel.org, linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org, LKML Subject: Re: [PATCH v2 1/2] platform/x86: wmi: Support reading/writing 16 bit EC values In-Reply-To: <20240307195753.2961-1-W_Armin@gmx.de> Message-ID: <21fd57a2-d8c3-779c-7090-b7cdfc8198be@linux.intel.com> References: <20240307195753.2961-1-W_Armin@gmx.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Thu, 7 Mar 2024, Armin Wolf wrote: > The ACPI EC address space handler currently only supports > reading/writing 8 bit values. Some firmware implementations however > want to access for example 16 bit values, which is prefectly legal > according to the ACPI spec. > > Add support for reading/writing such values. > > Tested on a Dell Inspiron 3505 and a Asus Prime B650-Plus. > > Signed-off-by: Armin Wolf > @@ -1162,27 +1188,28 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address, > u32 bits, u64 *value, > void *handler_context, void *region_context) > { > - int result = 0; > - u8 temp = 0; > + int bytes = bits / BITS_PER_BYTE; > + int ret; > + > + if (!value) > + return AE_NULL_ENTRY; > > - if ((address > 0xFF) || !value) > + if (bytes > sizeof(*value)) > return AE_BAD_PARAMETER; > > - if (function != ACPI_READ && function != ACPI_WRITE) > + if (address > U8_MAX || address + bytes > U8_MAX) This doesn't look correct. With address = 0xff and bits = 8 this will return AE_BAD_PARAMETER, is that intensional? -- i.