--- src/nvidia_subr.c.orig	2014-11-17 18:15:03.000000000 +0100
+++ src/nvidia_subr.c	2014-11-17 18:16:31.000000000 +0100
@@ -590,6 +590,10 @@
 
     sc = nv->os_state;
     sp = sc->api_sp;
+    /* If nvidia_open_dev failed and we're called from nvidia_dev_dtor, we
+     * already released api_sp. */
+    if (sp == NULL)
+        return 0;
 
     NV_PCI_CHECK_CONFIG_SPACE(sp, nv, TRUE, TRUE, TRUE);
     rm_free_unused_clients(sp, nv, filep);