Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934295AbbHLHNP (ORCPT ); Wed, 12 Aug 2015 03:13:15 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:53320 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965308AbbHLHJz (ORCPT ); Wed, 12 Aug 2015 03:09:55 -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 24/31] xtensa: handle page-less SG entries Date: Wed, 12 Aug 2015 09:05:43 +0200 Message-Id: <1439363150-8661-25-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: 1853 Lines: 58 Make all cache invalidation conditional on sg_has_page(). Signed-off-by: Christoph Hellwig --- arch/xtensa/include/asm/dma-mapping.h | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h index 1f5f6dc..262a1d1 100644 --- a/arch/xtensa/include/asm/dma-mapping.h +++ b/arch/xtensa/include/asm/dma-mapping.h @@ -61,10 +61,9 @@ dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, BUG_ON(direction == DMA_NONE); for_each_sg(sglist, sg, nents, i) { - BUG_ON(!sg_page(sg)); - sg->dma_address = sg_phys(sg); - consistent_sync(sg_virt(sg), sg->length, direction); + if (sg_has_page(sg)) + consistent_sync(sg_virt(sg), sg->length, direction); } return nents; @@ -131,8 +130,10 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems, int i; struct scatterlist *sg; - for_each_sg(sglist, sg, nelems, i) - consistent_sync(sg_virt(sg), sg->length, dir); + for_each_sg(sglist, sg, nelems, i) { + if (sg_has_page(sg)) + consistent_sync(sg_virt(sg), sg->length, dir); + } } static inline void @@ -142,8 +143,10 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int i; struct scatterlist *sg; - for_each_sg(sglist, sg, nelems, i) - consistent_sync(sg_virt(sg), sg->length, dir); + for_each_sg(sglist, sg, nelems, i) { + if (sg_has_page(sg)) + consistent_sync(sg_virt(sg), sg->length, dir); + } } static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) -- 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/