[AGPGART] Don't oops when deregistering failed to init agp modules.

ed4c75a3 · Dave Jones · 7282c60a · ed4c75a3
Commit ed4c75a3 authored Feb 10, 2003 by Dave Jones
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drivers/char/agp/backend.c drivers/char/agp/backend.c +3 -0

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--- a/drivers/char/agp/backend.c
+++ b/drivers/char/agp/backend.c
@@ -262,6 +262,9 @@ int agp_register_driver (struct agp_driver *drv)

 int agp_unregister_driver(struct agp_driver *drv)
 {
+	if (drv->dev==NULL)
+		return -ENODEV;
+
 	agp_bridge.type = NOT_SUPPORTED;
 	pm_unregister_all(agp_power);
 	agp_frontend_cleanup();