drm/i810: don't acces hw regs in lastclose

i810 uses a userspace provided mmio map using the drm core map
infrastructure. By the time we reach lastclose, this is all gone
and our mmio_map pointer points at freed memory. Depending upon
luck that still works, most often it just oopses.

Aside: drm maps aren't refcounted, so userspace can essentially oops
the kernel any time it wants to. Who cares.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c
index 6b73c3e..f7c17b2 100644 (file)
--- a/drivers/gpu/drm/i810/i810_dma.c
+++ b/drivers/gpu/drm/i810/i810_dma.c
@@ -222,8 +222,6 @@ static int i810_dma_cleanup(struct drm_device *dev)
                        pci_free_consistent(dev->pdev, PAGE_SIZE,
                                            dev_priv->hw_status_page,
                                            dev_priv->dma_status_page);
-                       /* Need to rewrite hardware status page */
-                       I810_WRITE(0x02080, 0x1ffff000);
                }
                kfree(dev->dev_private);
                dev->dev_private = NULL;