linux-kernel - Re: [PATCH] intel-iommu: fix sg

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Message-Id: <20071023141929B.fujita.tomonori@lab.ntt.co.jp>
Date:	Tue, 23 Oct 2007 14:19:29 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	jens.axboe@...cle.com
Cc:	fujita.tomonori@....ntt.co.jp, torvalds@...ux-foundation.org,
	anil.s.keshavamurthy@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] intel-iommu: fix sg_page()

On Tue, 23 Oct 2007 07:04:27 +0200
Jens Axboe <jens.axboe@...cle.com> wrote:

> On Tue, Oct 23 2007, FUJITA Tomonori wrote:
> > drivers/pci/intel-iommu.c: In function 'intel_unmap_sg':
> > drivers/pci/intel-iommu.c:1987: error: 'struct scatterlist' has no member named 'page'
> > drivers/pci/intel-iommu.c: In function 'intel_nontranslate_map_sg':
> > drivers/pci/intel-iommu.c:2013: error: 'struct scatterlist' has no member named 'page'
> > drivers/pci/intel-iommu.c:2014: error: 'struct scatterlist' has no member named 'page'
> > drivers/pci/intel-iommu.c: In function 'intel_map_sg':
> > drivers/pci/intel-iommu.c:2044: error: 'struct scatterlist' has no member named 'page'
> > drivers/pci/intel-iommu.c:2068: error: 'struct scatterlist' has no member named 'page'
> > 
> > Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> > ---
> >  drivers/pci/intel-iommu.c |   11 +++++------
> >  1 files changed, 5 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
> > index b3d7031..0f6e528 100644
> > --- a/drivers/pci/intel-iommu.c
> > +++ b/drivers/pci/intel-iommu.c
> > @@ -1962,7 +1962,6 @@ static void intel_free_coherent(struct device *hwdev, size_t size,
> >  	free_pages((unsigned long)vaddr, order);
> >  }
> >  
> > -#define SG_ENT_VIRT_ADDRESS(sg)	(page_address((sg)->page) + (sg)->offset)
> 
> Thanks, though I preferred to just do the one-liner for the conversions.
> Funny that I missed this file - ah seems it was merged yesterday as
> well, it didn't exist in the current tree I was working against.

Yeah, the patchset has been -mm and was merged after the sg updates.


Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index b3d7031..a837d64 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -1962,7 +1962,7 @@ static void intel_free_coherent(struct device *hwdev, size_t size,
 	free_pages((unsigned long)vaddr, order);
 }
 
-#define SG_ENT_VIRT_ADDRESS(sg)	(page_address((sg)->page) + (sg)->offset)
+#define SG_ENT_VIRT_ADDRESS(sg)	sg_virt(sg)
 static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
 	int nelems, int dir)
 {
@@ -2010,7 +2010,7 @@ static int intel_nontranslate_map_sg(struct device *hddev,
 	struct scatterlist *sg;
 
 	for_each_sg(sglist, sg, nelems, i) {
-		BUG_ON(!sg->page);
+		BUG_ON(!sg_page(sg));
 		sg->dma_address = virt_to_bus(SG_ENT_VIRT_ADDRESS(sg));
 		sg->dma_length = sg->length;
 	}
-
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