Index: uspace/lib/usbhost/src/bus.c
===================================================================
--- uspace/lib/usbhost/src/bus.c	(revision 2b3547888594843410a5d82a14955a508d74aa1f)
+++ uspace/lib/usbhost/src/bus.c	(revision 3f6c94ed25cbcbe1e9200e9631b1a3f5f894624d)
@@ -87,8 +87,5 @@
 		return ENOTSUP;
 
-	fibril_mutex_lock(&bus->guard);
-	const int r = bus->ops.enumerate_device(bus, hcd, dev);
-	fibril_mutex_unlock(&bus->guard);
-	return r;
+	return bus->ops.enumerate_device(bus, hcd, dev);
 }
 
@@ -101,8 +98,5 @@
 		return ENOTSUP;
 
-	fibril_mutex_lock(&bus->guard);
-	const int r = bus->ops.remove_device(bus, hcd, dev);
-	fibril_mutex_unlock(&bus->guard);
-	return r;
+	return bus->ops.remove_device(bus, hcd, dev);
 }