Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965506AbcKJRfq (ORCPT ); Thu, 10 Nov 2016 12:35:46 -0500 Received: from mga04.intel.com ([192.55.52.120]:11035 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964955AbcKJRfm (ORCPT ); Thu, 10 Nov 2016 12:35:42 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,619,1473145200"; d="scan'208";a="1066806466" Subject: [mm PATCH v3 03/23] arch/avr32: Add option to skip sync on DMA map From: Alexander Duyck To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Hans-Christian Noren Egtvedt Date: Thu, 10 Nov 2016 06:34:30 -0500 Message-ID: <20161110113430.76501.79737.stgit@ahduyck-blue-test.jf.intel.com> In-Reply-To: <20161110113027.76501.63030.stgit@ahduyck-blue-test.jf.intel.com> References: <20161110113027.76501.63030.stgit@ahduyck-blue-test.jf.intel.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1199 Lines: 35 The use of DMA_ATTR_SKIP_CPU_SYNC was not consistent across all of the DMA APIs in the arch/arm folder. This change is meant to correct that so that we get consistent behavior. Acked-by: Hans-Christian Noren Egtvedt Signed-off-by: Alexander Duyck --- arch/avr32/mm/dma-coherent.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/avr32/mm/dma-coherent.c b/arch/avr32/mm/dma-coherent.c index 58610d0..54534e5 100644 --- a/arch/avr32/mm/dma-coherent.c +++ b/arch/avr32/mm/dma-coherent.c @@ -146,7 +146,8 @@ static dma_addr_t avr32_dma_map_page(struct device *dev, struct page *page, { void *cpu_addr = page_address(page) + offset; - dma_cache_sync(dev, cpu_addr, size, direction); + if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) + dma_cache_sync(dev, cpu_addr, size, direction); return virt_to_bus(cpu_addr); } @@ -162,6 +163,10 @@ static int avr32_dma_map_sg(struct device *dev, struct scatterlist *sglist, sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset; virt = sg_virt(sg); + + if (attrs & DMA_ATTR_SKIP_CPU_SYNC) + continue; + dma_cache_sync(dev, virt, sg->length, direction); }