drm/radeon: AGP memory is only I/O if the aperture can be mapped by the CPU.
Fixes AGP initialization failure with Apple UniNorth bridges due to trying to
ioremap() normal RAM.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 3aa3a65..e9918d8 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -451,7 +451,7 @@
/* RADEON_IS_AGP is set only if AGP is active */
mem->bus.offset = mem->mm_node->start << PAGE_SHIFT;
mem->bus.base = rdev->mc.agp_base;
- mem->bus.is_iomem = true;
+ mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
}
#endif
break;