linux-kernel - [PATCH 09/31] ia64/pci_dma: handle page-less SG entries

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Message-Id: <1439363150-8661-10-git-send-email-hch@lst.de>
Date:	Wed, 12 Aug 2015 09:05:28 +0200
From:	Christoph Hellwig <hch@....de>
To:	torvalds@...ux-foundation.org, axboe@...nel.dk
Cc:	dan.j.williams@...el.com, vgupta@...opsys.com,
	hskinnemoen@...il.com, egtvedt@...fundet.no, realmz6@...il.com,
	dhowells@...hat.com, monstr@...str.eu, x86@...nel.org,
	dwmw2@...radead.org, alex.williamson@...hat.com,
	grundler@...isc-linux.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-alpha@...r.kernel.org,
	linux-ia64@...r.kernel.org, linux-metag@...r.kernel.org,
	linux-mips@...ux-mips.org, linux-parisc@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
	linux-nvdimm@...1.01.org, linux-media@...r.kernel.org
Subject: [PATCH 09/31] ia64/pci_dma: handle page-less SG entries

Use sg_phys() instead of virt_to_phys(sg_virt(sg)) so that we don't
require a kernel virtual address.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 arch/ia64/sn/pci/pci_dma.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/ia64/sn/pci/pci_dma.c b/arch/ia64/sn/pci/pci_dma.c
index d0853e8..8f713c8 100644
--- a/arch/ia64/sn/pci/pci_dma.c
+++ b/arch/ia64/sn/pci/pci_dma.c
@@ -18,9 +18,6 @@
 #include <asm/sn/pcidev.h>
 #include <asm/sn/sn_sal.h>
 
-#define SG_ENT_VIRT_ADDRESS(sg)	(sg_virt((sg)))
-#define SG_ENT_PHYS_ADDRESS(SG)	virt_to_phys(SG_ENT_VIRT_ADDRESS(SG))
-
 /**
  * sn_dma_supported - test a DMA mask
  * @dev: device to test
@@ -291,7 +288,7 @@ static int sn_dma_map_sg(struct device *dev, struct scatterlist *sgl,
 	 */
 	for_each_sg(sgl, sg, nhwentries, i) {
 		dma_addr_t dma_addr;
-		phys_addr = SG_ENT_PHYS_ADDRESS(sg);
+		phys_addr = sg_phys(sg);
 		if (dmabarr)
 			dma_addr = provider->dma_map_consistent(pdev,
 								phys_addr,
-- 
1.9.1

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