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=-2.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 990DCC43444 for ; Fri, 18 Jan 2019 11:38:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5EC4B20652 for ; Fri, 18 Jan 2019 11:38:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="NM1ZpJGN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727491AbfARLhu (ORCPT ); Fri, 18 Jan 2019 06:37:50 -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 ); 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 To: Pawel Osciak , Marek Szyprowski , Kyungmin Park , =?UTF-8?q?Niklas=20S=C3=B6derlund?= Cc: Russell King , Mauro Carvalho Chehab , 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 by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@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