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 X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 E076CC43381 for ; Thu, 28 Mar 2019 14:17:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A0A8221773 for ; Thu, 28 Mar 2019 14:17:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="TfWnzcWn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727089AbfC1ORJ (ORCPT ); Thu, 28 Mar 2019 10:17:09 -0400 Received: from mail-it1-f196.google.com ([209.85.166.196]:37033 "EHLO mail-it1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726190AbfC1ORH (ORCPT ); Thu, 28 Mar 2019 10:17:07 -0400 Received: by mail-it1-f196.google.com with SMTP id u65so6309152itc.2 for ; Thu, 28 Mar 2019 07:17:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=qp+Dpr5cOYlTukhG8arWCLdHau5MAb5m/3soXMgxbz0=; b=TfWnzcWnvBSSN1jAawy3+QJH1Nze83y3XScfpJW8edZeCWy/u8xHQa40HiEZGpdrSN lCzMZtdKjD/yn+tTAKoEFNe2NIWzEgZfDGurZ9fdWhJIiQBCfxpDBUdWx3WrMjR3zBMf 1gWdIISfIfVFmgrlEr5UxN6D/OCFYahr88XqTapjbW1WMcxtY+uFr+s6bMbrGX5x2cD+ /x33w0TJrBRxzTZV4wFPawbzuYRDCfiIxQhrxnJjcEjwTdY8FG4GJqQ96fl5Arb10FMA 1i9rW8bS3LU28TLN29SaNj+Cnfu4h9QlqjY+i8fUd+UoPfbn0mW6uxEGDXludCJlRK/S OEUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=qp+Dpr5cOYlTukhG8arWCLdHau5MAb5m/3soXMgxbz0=; b=Y7aYcCr+AdNxebAkAmWRNqq2tUCbE1auxhZQq9XugKtq6qhfLoZrocpPf0zhOIM9i/ Yy4DT0EyX4qzyqV4Lt3uDO543JgYaolgCuKT9gIcJGyVYl8EKtMDhfkwRg6zxB41SPvH ve2LiuUFnuHFShSni3u03/GH5r2zzxyKupYp1fUfS3rZsSAXOOpkcqDhLHmmUuDHxj7p 5cXXFselrymHwIjCTkMtf2Z+UTEGB43XJlvR8MDANtLPH9XOuAWCC8JRhqrCvEerEDhB hhLiejDCVSaYqRaPlLs0xE1TwPSCuXSGZQPL59TbStZu7QCGKZ41WOgYDNNbcNQTJK6w fEOA== X-Gm-Message-State: APjAAAUXqs8VZbBQM5LdpwVa1wGckujVnU8QG1wzbrBom+4gCg+Z4gXp tIEWd2hO33SF5jqRSn6S0qhEGxpaBk5WJA== X-Google-Smtp-Source: APXvYqxbaOI3W2t7hwTPlynHUZHXDPAHAHqkd2rRs7evgVo7BgycY6cH2XMYMgaJXNkZfK3XBuyVFg== X-Received: by 2002:a24:1f06:: with SMTP id d6mr180913itd.11.1553782625977; Thu, 28 Mar 2019 07:17:05 -0700 (PDT) Received: from [192.168.1.158] ([216.160.245.98]) by smtp.gmail.com with ESMTPSA id s12sm1751550itj.41.2019.03.28.07.17.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 28 Mar 2019 07:17:05 -0700 (PDT) Subject: Re: [PATCH] libata: fix using DMA buffers on stack To: raymond pang Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org References: <20190328121925.15488-1-raymondpangxd@gmail.com> From: Jens Axboe Message-ID: <6c7d28e9-ac56-bffe-05c0-2ca7ea6ff37f@kernel.dk> Date: Thu, 28 Mar 2019 08:17:04 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <20190328121925.15488-1-raymondpangxd@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/28/19 6:19 AM, raymond pang wrote: > When CONFIG_VMAP_STACK=y, __pa() returns incorrect physical address for > a stack virtual address. Stack DMA buffers must be avoided. Thanks, applied. -- Jens Axboe