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drm/ast: invalidate page tables when pinning a BO
same fix as cirrus and mgag200. Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -323,6 +323,7 @@ int ast_bo_create(struct drm_device *dev, int size, int align,
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astbo->gem.driver_private = NULL;
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astbo->bo.bdev = &ast->ttm.bdev;
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astbo->bo.bdev->dev_mapping = dev->dev_mapping;
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ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
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