set sarea_priv to NULL to prevent possible access on next open/close.

From Robert Noland via drm git.

diff --git a/sys/dev/pci/drm/i915_dma.c b/sys/dev/pci/drm/i915_dma.c
index 92edca5..7d50c29 100644 (file)
--- a/sys/dev/pci/drm/i915_dma.c
+++ b/sys/dev/pci/drm/i915_dma.c
@@ -984,6 +984,8 @@ void i915_driver_lastclose(struct drm_device * dev)
 
        if (drm_getsarea(dev) && dev_priv->sarea_priv)
                i915_do_cleanup_pageflip(dev);
+       dev_priv->sarea_priv = NULL;
+
        if (dev_priv->agp_heap)
                i915_mem_takedown(&(dev_priv->agp_heap));
        i915_dma_cleanup(dev);