Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965380AbbHLHKD (ORCPT ); Wed, 12 Aug 2015 03:10:03 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:53340 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965302AbbHLHJ5 (ORCPT ); Wed, 12 Aug 2015 03:09:57 -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 25/31] frv: handle page-less SG entries Date: Wed, 12 Aug 2015 09:05:44 +0200 Message-Id: <1439363150-8661-26-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: 1110 Lines: 34 Only call kmap_atomic_primary when the SG entry is mapped into kernel virtual space. XXX: the code already looks odd due to the lack of pairing between kmap_atomic_primary and kunmap_atomic_primary. Does it work either before or after this patch? Signed-off-by: Christoph Hellwig --- arch/frv/mb93090-mb00/pci-dma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c index 4d1f01d..77b3a1c 100644 --- a/arch/frv/mb93090-mb00/pci-dma.c +++ b/arch/frv/mb93090-mb00/pci-dma.c @@ -63,6 +63,9 @@ int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, dampr2 = __get_DAMPR(2); for_each_sg(sglist, sg, nents, i) { + if (!sg_has_page(sg)) + continue; + vaddr = kmap_atomic_primary(sg_page(sg)); frv_dcache_writeback((unsigned long) vaddr, -- 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/