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agp: iommu_gfx_mapped only available if CONFIG_INTEL_IOMMU is set

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Kernels with no iommu support cannot ever need the Ironlake
work-around, so never enable it in that case.

Might be better to completely remove the work-around from the kernel
in this case?

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
This commit is contained in:
Keith Packard 2011-10-28 10:28:00 -07:00
parent 3fca806cf3
commit c5e62bdd73
1 changed files with 3 additions and 2 deletions
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5
drivers/char/agp/intel-gtt.c
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@ -1186,10 +1186,11 @@ static void gen6_cleanup(void)
/* Certain Gen5 chipsets require require idling the GPU before
* unmapping anything from the GTT when VT-d is enabled.
*/
extern int intel_iommu_gfx_mapped;
static inline int needs_idle_maps(void)
{
#ifdef CONFIG_INTEL_IOMMU
const unsigned short gpu_devid = intel_private.pcidev->device;
extern int intel_iommu_gfx_mapped;
/* Query intel_iommu to see if we need the workaround. Presumably that
* was loaded first.
@ -1198,7 +1199,7 @@ static inline int needs_idle_maps(void)
gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG) &&
intel_iommu_gfx_mapped)
return 1;
#endif
return 0;
}