i915: Only look up dev_priv->mmio_map if it's not already set up

diff --git a/shared-core/i915_dma.c b/shared-core/i915_dma.c
index 0682a33..fc00920 100644 (file)
--- a/shared-core/i915_dma.c
+++ b/shared-core/i915_dma.c
@@ -117,7 +117,8 @@ static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
                return -EINVAL;
        }
 
-       dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
+       if (init->mmio_offset != 0)
+               dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
        if (!dev_priv->mmio_map) {
                i915_dma_cleanup(dev);
                DRM_ERROR("can not find mmio map!\n");