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=-3.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 C4E75C32758 for ; Sun, 11 Aug 2019 08:05:58 +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 9A6BE2173C for ; Sun, 11 Aug 2019 08:05:58 +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="T46e9N54" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A6BE2173C 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 7250DACC; Sun, 11 Aug 2019 08:05:58 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id C4D2FAC8 for ; Sun, 11 Aug 2019 08:05:56 +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 056206E0 for ; Sun, 11 Aug 2019 08:05:55 +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=SRihJ2JCOubb4xOLvkiaXfqbtokLoWesn+Hfy8/Vu0Q=; b=T46e9N54SMpr4GBv9pEwtOISh 8/dhFXd16JGfmcLf2eLpHpf42sr2Bl89BbcsVn78EvBYavRPWjJnCCfr61VUbbd7pC0bJSI3dXBiK RNwWWO7xpA1SustKupCRocJIOMXxD4ifjurw05OKz/wk9fvh+CB6DwzdKjAPt0wss6bImBTMAZwgw iGT4dCCWVxHYAwsvPKv7gMFJ4ba6oyPfmBeNFsECPn7X2j9bXyRWwTuXJblluWLjH2gc3ZRQZHmFa bRegtSVX/8coTJsg53ce9JsZyT0FA5FzCeKMKV/4665rURUx3jNb9GTGLf+uOIZEcgX74HKJ1M1Uf voPPGPSSA==; Received: from [2001:4bb8:180:1ec3:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hwir0-0001uh-74; Sun, 11 Aug 2019 08:05:27 +0000 From: Christoph Hellwig To: Greg Kroah-Hartman , Maxime Chevallier Subject: next take at setting up a dma mask by default for platform devices Date: Sun, 11 Aug 2019 10:05:14 +0200 Message-Id: <20190811080520.21712-1-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, Olav Kongas , Gavin Li , linuxppc-dev@lists.ozlabs.org, Mathias Nyman , Geoff Levand , Fabio Estevam , Sascha Hauer , linux-usb@vger.kernel.org, Michal Simek , linux-kernel@vger.kernel.org, Tony Prisk , iommu@lists.linux-foundation.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 from this series should probably go into 5.3 and then uses as the basis for the decision to use dma_mmap_coherent. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu