I'm a dumbass: the test in the MOD_SHUTDOWN case in ndis_modevent()

that checks to see if any devices are still in the devlist was reversed.

sys/compat/ndis/kern_ndis.c

@@ -150,7 +150,7 @@ ndis_modevent(module_t mod, int cmd, void *arg)
 	case MOD_SHUTDOWN:
 		/* stop kthreads */
 		ndis_destroy_kthreads();
-		if (TAILQ_FIRST(&ndis_devhead) != NULL) {
+		if (TAILQ_FIRST(&ndis_devhead) == NULL) {
 			/* Shut down subsystems */
 			ndis_libfini();
 			ntoskrnl_libfini();