Re: [PATCH 1/3] x86 PCI: Fix identity mapping for sandy bridge

[Andrew Morton]

On Thu, 02 Feb 2012 17:56:51 -0600
Mike Travis <travis@xxxxxxx> wrote:

> --- linux.orig/drivers/iommu/intel-iommu.c
> +++ linux/drivers/iommu/intel-iommu.c
> @@ -48,8 +48,6 @@
>  #define ROOT_SIZE		VTD_PAGE_SIZE
>  #define CONTEXT_SIZE		VTD_PAGE_SIZE
>  
> -#define IS_BRIDGE_HOST_DEVICE(pdev) \
> -			    ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
>  #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
>  #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA)
>  #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e)

I suppose it would be tiresome to point out what happens when someone
does IS_GFX_DEVICE(pdev + 1).

Macros: Just Don't Do It.
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