agp: Fix a kernel panic on boot issue

* A pointer wasn't correctly initialized, leading to a
  Fatal trap 12: page fault while in kernel mode panic

* This commit fixes bug report #2467

Tested-by: Eric Christeson, David Shao

diff --git a/sys/dev/agp/agp.c b/sys/dev/agp/agp.c
index 13d7f68..0a7cb8f 100644 (file)
--- a/sys/dev/agp/agp.c
+++ b/sys/dev/agp/agp.c
@@ -237,8 +237,8 @@ agp_generic_attach(device_t dev)
        TAILQ_INIT(&sc->as_memory);
        sc->as_nextid = 1;
 
-       make_dev(&agp_ops, device_get_unit(dev), UID_ROOT, GID_WHEEL,
-                0600, "agpgart");
+       sc->as_devnode = make_dev(&agp_ops,
+           0, UID_ROOT, GID_WHEEL, 0600, "agpgart");
        sc->as_devnode->si_drv1 = dev;
 
        return 0;