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=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 E596EC3A59C for ; Fri, 16 Aug 2019 06:27:10 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AECF72077C for ; Fri, 16 Aug 2019 06:27:10 +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="Wmcwc0aj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AECF72077C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 46434B09; Fri, 16 Aug 2019 06:27:10 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id F3D6772A for ; Fri, 16 Aug 2019 06:27:08 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 6EA0276D for ; Fri, 16 Aug 2019 06:27:08 +0000 (UTC) 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=uBlDv/1G+IgsUhlm43y/mFkJBkzGrCkwGGW4KRg1WIM=; b=Wmcwc0aj6CAeJvPoN6pBK5R6b i5YXqMFaEGami53EUAEYW5H9LP5RV2vw6BQ2GKNw4UVGF7Pwjge5MdyR82FT+o0xH6mc3+JoPhptL +tYQkTLvihOeG5Q1/uvFbymhEmW5tGt1hxdQ3AfdLRPHhf/t6XmTEoxxoyUliePoCJ7oYf5k8pNMq GEYj2QQzOjp49Cld+WmpqDus7lpxzFfO1b60p1QXD19DFumJMRiDYLdByA1yvWDGJ928Xf3gFMSKm TmzZ3hL9ygmIeis9H93XDRrqRmRUsN43ePZB8ghFZRniMK1PL78+NnUbbjavFiwzeazT92ZwSh6u2 xE2vRzB6w==; Received: from 089144199030.atnat0008.highway.a1.net ([89.144.199.30] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hyVhG-0005Ro-J6; Fri, 16 Aug 2019 06:26:47 +0000 From: Christoph Hellwig To: Greg Kroah-Hartman , Maxime Chevallier Subject: next take at setting up a dma mask by default for platform devices v2 Date: Fri, 16 Aug 2019 08:24:29 +0200 Message-Id: <20190816062435.881-1-hch@lst.de> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Cc: linux-arch@vger.kernel.org, Gavin Li , linuxppc-dev@lists.ozlabs.org, Mathias Nyman , Geoff Levand , Fabio Estevam , Sascha Hauer , linux-usb@vger.kernel.org, Michal Simek , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, Alan Stern , NXP Linux Team , Pengutronix Kernel Team , Minas Harutyunyan , Shawn Guo , Bin Liu , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Hi all, this is another attempt to make sure the dma_mask pointer is always initialized for platform devices. Not doing so lead to lots of boilerplate code, and makes platform devices different from all our major busses like PCI where we always set up a dma_mask. In the long run this should also help to eventually make dma_mask a scalar value instead of a pointer and remove even more cruft. The bigger blocker for this last time was the fact that the usb subsystem uses the presence or lack of a dma_mask to check if the core should do dma mapping for the driver, which is highly unusual. So we fix this first. Note that this has some overlap with the pending desire to use the proper dma_mmap_coherent helper for mapping usb buffers. The first two patches have already been queued up by Greg and are only included for completeness. Changes since v1: - fix a compile error in the ppc of ohci driver - revamp the last patch to get rid of the archdata callout entirely. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu