Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3030772imu;
        Fri, 18 Jan 2019 03:39:53 -0800 (PST)
X-Google-Smtp-Source: ALg8bN6nZO1sdjgIgb/3Gs03zNEgkyjQGRGUpK6/RrwRKQFYnpsrjjLWakx57RF4LVLYanVLWj/r
X-Received: by 2002:a17:902:50e:: with SMTP id 14mr18678857plf.141.1547811593028;
        Fri, 18 Jan 2019 03:39:53 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1547811593; cv=none;
        d=google.com; s=arc-20160816;
        b=G615MBdLTx6fr2VtYar/KJ8Wc6NcMrNHBpJtU23h//r/GsiFrXMC9Xy9vM3bsm9qiu
         drpO4FNY/JW+1c4PJ2vjV97HCXOULvpQt0BOGwCAlrJqATJEuatYo6MElEs7pih2qF/O
         Bj9JnMSziTkvcQkiegCG/g7UmH/UJ3JdSmDHDp+XIE6yMzDmn3i48JWHzA1AkolifOtA
         hqj5mGZ3bzCxjQOxDow2CeBE8BI+7WAEuuKi65L7Pi/LFIeIU9RCVsL90H7F9yuyjWHO
         1t0eP6DBhSxwchS2I8aynm3Lw/wZH69cSeZfJuOQyaZsl251hJeR1yKieDuFwPaMcqEZ
         WoIg==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:sender:content-transfer-encoding:mime-version
         :message-id:date:subject:cc:to:from:dkim-signature;
        bh=OX54bckM/rwEp4H5la6/F38I3bmsjj9BqreNm9vFgKU=;
        b=RfUn7Xi54c2bE/XXdrykA696lElBZ1uzgycGts3o8GunCUcfDh8fWrtXlNRmHCGOT+
         vZ+AIpSYYYvE8/N+ydKUkaYuuQFxBVLOtfais5cZ+dxg9T7s5lZGDgPEvzaIw3dEeNtZ
         5770af0Gvgd5nNGBqgXPHSSVkqXhQtk2uDk9QFUuKwTOvFKtSr3yuYs1khpbwL+Az50M
         F88y3xwih9Y1oMByIPxjLccnpzjRAwesOMt2MeqD5e9S75QvsxJg48xk8irVJDKIjaDx
         NQZsAIn4JTW5cvB7u20za0lB/wQqXVCtl7aWam0SqxyIKj0XTt+Ri0nFmTGXJD0IwbLT
         gfZA==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=NM1ZpJGN;
       spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67])
        by mx.google.com with ESMTP id g19si4445370pgj.358.2019.01.18.03.39.37;
        Fri, 18 Jan 2019 03:39:53 -0800 (PST)
Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Authentication-Results: mx.google.com;
       dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=NM1ZpJGN;
       spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1727518AbfARLhw (ORCPT <rfc822;thunderbird.krnldev@gmail.com>
        + 99 others); Fri, 18 Jan 2019 06:37:52 -0500
Received: from bombadil.infradead.org ([198.137.202.133]:56800 "EHLO
        bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1727125AbfARLhs (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 18 Jan 2019 06:37:48 -0500
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
        d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding:
        MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:
        Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender:
        Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id:
        List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive;
         bh=OX54bckM/rwEp4H5la6/F38I3bmsjj9BqreNm9vFgKU=; b=NM1ZpJGN9GIEtFPLireLSQM58
        lhPpr/NkFXHPqraZrNpHSvJLMGN3QcWxFpLzHsPoDAuzLVJzJ993PUCF4EPUvJzk4fNQhaBsXonLv
        6Iwd3IME6U01AO10NdOLMhmeTXKyZlI4J427ly8wY3KJouQfjgzRMfwPXxDRaqBfGpxAIJTfjey0e
        WJO8y+debPaWL6RXafOmM5uyii4G8RQxAp4OuF7sjymQWJB5cRHnTP+qQe4x8YakfdKL4pBaAtKL5
        yKcK6uOyCZ4zj+oFyYGnSwLugNEvfkLXjr4e7r537Y3r2CCn6weEt47SUv084M1Dr1TKFS20smn/O
        gG/XOrKmQ==;
Received: from 089144210168.atnat0019.highway.a1.net ([89.144.210.168] helo=localhost)
        by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux))
        id 1gkSSo-0005OJ-Oj; Fri, 18 Jan 2019 11:37:31 +0000
From:   Christoph Hellwig <hch@lst.de>
To:     Pawel Osciak <pawel@osciak.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        =?UTF-8?q?Niklas=20S=C3=B6derlund?= 
        <niklas.soderlund+renesas@ragnatech.se>
Cc:     Russell King <linux@armlinux.org.uk>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        iommu@lists.linux-foundation.org,
        linux-arm-kernel@lists.infradead.org,
        linuxppc-dev@lists.ozlabs.org, linux-media@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: fix a layering violation in videobuf2 and improve dma_map_resource v2
Date:   Fri, 18 Jan 2019 12:37:24 +0100
Message-Id: <20190118113727.3270-1-hch@lst.de>
X-Mailer: git-send-email 2.20.1
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by bombadil.infradead.org. See http://www.infradead.org/rpr.html
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi all,

this series fixes a rather gross layering violation in videobuf2, which
pokes into arm DMA mapping internals to get a DMA address for memory that
does not have a page structure, and to do so fixes up the dma_map_resource
implementation to not provide a somewhat dangerous default and improve
the error handling.

Changes since v1:
 - don't apply bus offsets in dma_direct_map_resource