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

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Date:	Tue, 23 Oct 2007 09:32:36 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	torvalds@...ux-foundation.org, anil.s.keshavamurthy@...el.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] intel-iommu: fix sg_page()

On Tue, Oct 23 2007, FUJITA Tomonori wrote:
> 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;
>  	}

Great, applied this one.

-- 
Jens Axboe

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