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=-14.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 EFD58C07E94 for ; Fri, 4 Jun 2021 15:15:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 B1A4C613EA for ; Fri, 4 Jun 2021 15:15:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B1A4C613EA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=WJr0B1frAukMPIDPwyHeJzWmqLCk5gAVgYqj5WvBk2k=; b=l9gRkni/UlYIQp 7wkt/o1irl1ngCydDbJna1B08n9MxodshpA6vLb46SEaOPl2alpSCeBYXJU+DIhm2NS1qtDPe2eB1 PL6j2lzAyvb9lSn1gt92TZsCbLHYo+Cu5EJOjNcWNs9ielZp39P5129r/r4XQWSCpINwjl+Od4xAX 8MS5M9K7+8ehitEpXLe2Z5o6k/0Mk5DzEmD1yHOvHw/MSlzibFt0VtV5y0zL/97dPvCSNS8SfI7xc 5GIEc8lN2jba7yAb9RbNiwYmky8TBwH/HCxbw8T/G0cN5NWsdV69jO64kPBWhQTGsG7c2rB+wf+0P o7yGJgI9FHqYwJT1MIcA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lpBVa-00E6cK-Bf; Fri, 04 Jun 2021 15:13:14 +0000 Received: from 8bytes.org ([81.169.241.247] helo=theia.8bytes.org) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lpBUE-00E5LK-IM; Fri, 04 Jun 2021 15:11:55 +0000 Received: by theia.8bytes.org (Postfix, from userid 1000) id 77ED03A9; Fri, 4 Jun 2021 17:11:48 +0200 (CEST) Date: Fri, 4 Jun 2021 17:11:47 +0200 From: Joerg Roedel To: Robin Murphy Cc: will@kernel.org, heiko@sntech.de, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, benjamin.gaignard@collabora.com, xxm@rock-chips.com Subject: Re: [PATCH] iommu/rockchip: Remove redundant DMA syncs Message-ID: References: <5c29a9ff0a20df0167635b1901f94b5195c1fb28.1621604979.git.robin.murphy@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5c29a9ff0a20df0167635b1901f94b5195c1fb28.1621604979.git.robin.murphy@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210604_081150_798684_4FC92C47 X-CRM114-Status: UNSURE ( 9.57 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, May 21, 2021 at 02:49:39PM +0100, Robin Murphy wrote: > When we allocate new pagetable pages, we don't modify them between the > initial dma_map_single() call and the dma_sync_single_for_device() call > via rk_iommu_flush(), so the latter is entirely pointless. > > Signed-off-by: Robin Murphy > --- > drivers/iommu/rockchip-iommu.c | 3 --- > 1 file changed, 3 deletions(-) Applied, thanks Robin. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel