From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=LLNM=ZF=vger.kernel.org=linux-kernel-owner@kernel.org>
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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no
	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 4CD37C43331
	for <linux-kernel@archiver.kernel.org>; Wed, 13 Nov 2019 11:02:13 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
	by mail.kernel.org (Postfix) with ESMTP id 27AF7222C1
	for <linux-kernel@archiver.kernel.org>; Wed, 13 Nov 2019 11:02:13 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1727751AbfKMLCM (ORCPT
        <rfc822;linux-kernel@archiver.kernel.org>);
        Wed, 13 Nov 2019 06:02:12 -0500
Received: from verein.lst.de ([213.95.11.211]:33598 "EHLO verein.lst.de"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1726165AbfKMLCM (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 13 Nov 2019 06:02:12 -0500
Received: by verein.lst.de (Postfix, from userid 2407)
        id 1BF6268AFE; Wed, 13 Nov 2019 12:02:08 +0100 (CET)
Date:   Wed, 13 Nov 2019 12:02:07 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     Christian Zigotzky <chzigotzky@xenosoft.de>
Cc:     Christoph Hellwig <hch@lst.de>, linux-arch@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        iommu@lists.linux-foundation.org,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        paulus@samba.org, darren@stevens-zone.net,
        "contact@a-eon.com" <contact@a-eon.com>, rtd2@xtra.co.nz,
        mad skateman <madskateman@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        nsaenzjulienne@suse.de
Subject: Re: Bug 205201 - overflow of DMA mask and bus mask
Message-ID: <20191113110207.GA7280@lst.de>
References: <3504ee70-02de-049e-6402-2d530bf55a84@xenosoft.de> <46025f1b-db20-ac23-7dcd-10bc43bbb6ee@xenosoft.de> <20191105162856.GA15402@lst.de> <2f3c81bd-d498-066a-12c0-0a7715cda18f@xenosoft.de> <d2c614ec-c56e-3ec2-12d0-7561cd30c643@xenosoft.de> <af32bfcc-5559-578d-e1f4-75e454c965bf@xenosoft.de> <0c5a8009-d28b-601f-3d1a-9de0e869911c@xenosoft.de> <a794864f-04ae-9b90-50e7-01b416c861fe@xenosoft.de> <20191112144109.GA11805@lst.de> <9b14ca1b-2d5d-52b5-c7b4-0e637dbb1157@xenosoft.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <9b14ca1b-2d5d-52b5-c7b4-0e637dbb1157@xenosoft.de>
User-Agent: Mutt/1.5.17 (2007-11-01)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Interesting.  Give me some time to come up with a real fix, as drivers
really should not mess with GFP flags for these allocations, and even
if they did swiotlb is supposed to take care of any resulting problems.