Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934357AbbHLHO5 (ORCPT ); Wed, 12 Aug 2015 03:14:57 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:53203 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965187AbbHLHJg (ORCPT ); Wed, 12 Aug 2015 03:09:36 -0400 From: Christoph Hellwig To: torvalds@linux-foundation.org, axboe@kernel.dk Cc: dan.j.williams@intel.com, vgupta@synopsys.com, hskinnemoen@gmail.com, egtvedt@samfundet.no, realmz6@gmail.com, dhowells@redhat.com, monstr@monstr.eu, x86@kernel.org, dwmw2@infradead.org, alex.williamson@redhat.com, grundler@parisc-linux.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-metag@vger.kernel.org, linux-mips@linux-mips.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-nvdimm@ml01.01.org, linux-media@vger.kernel.org Subject: [PATCH 18/31] nios2: handle page-less SG entries Date: Wed, 12 Aug 2015 09:05:37 +0200 Message-Id: <1439363150-8661-19-git-send-email-hch@lst.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1439363150-8661-1-git-send-email-hch@lst.de> References: <1439363150-8661-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2475 Lines: 77 Make all cache invalidation conditional on sg_has_page() and use sg_phys to get the physical address directly. Signed-off-by: Christoph Hellwig --- arch/nios2/mm/dma-mapping.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/arch/nios2/mm/dma-mapping.c b/arch/nios2/mm/dma-mapping.c index ac5da75..1a0a68d 100644 --- a/arch/nios2/mm/dma-mapping.c +++ b/arch/nios2/mm/dma-mapping.c @@ -64,13 +64,11 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, BUG_ON(!valid_dma_direction(direction)); for_each_sg(sg, sg, nents, i) { - void *addr; - - addr = sg_virt(sg); - if (addr) { - __dma_sync_for_device(addr, sg->length, direction); - sg->dma_address = sg_phys(sg); + if (sg_has_page(sg)) { + __dma_sync_for_device(sg_virt(sg), sg->length, + direction); } + sg->dma_address = sg_phys(sg); } return nents; @@ -113,9 +111,8 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, return; for_each_sg(sg, sg, nhwentries, i) { - addr = sg_virt(sg); - if (addr) - __dma_sync_for_cpu(addr, sg->length, direction); + if (sg_has_page(sg)) + __dma_sync_for_cpu(sg_virt(sg), sg->length, direction); } } EXPORT_SYMBOL(dma_unmap_sg); @@ -166,8 +163,10 @@ void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, BUG_ON(!valid_dma_direction(direction)); /* Make sure that gcc doesn't leave the empty loop body. */ - for_each_sg(sg, sg, nelems, i) - __dma_sync_for_cpu(sg_virt(sg), sg->length, direction); + for_each_sg(sg, sg, nelems, i) { + if (sg_has_page(sg)) + __dma_sync_for_cpu(sg_virt(sg), sg->length, direction); + } } EXPORT_SYMBOL(dma_sync_sg_for_cpu); @@ -179,8 +178,10 @@ void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, BUG_ON(!valid_dma_direction(direction)); /* Make sure that gcc doesn't leave the empty loop body. */ - for_each_sg(sg, sg, nelems, i) - __dma_sync_for_device(sg_virt(sg), sg->length, direction); - + for_each_sg(sg, sg, nelems, i) { + if (sg_has_page(sg)) + __dma_sync_for_device(sg_virt(sg), sg->length, + direction); + } } EXPORT_SYMBOL(dma_sync_sg_for_device); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/