Index: uspace/drv/bus/usb/xhci/commands.c
===================================================================
--- uspace/drv/bus/usb/xhci/commands.c	(revision 04df06345ff43b92dfec45d685625ca492c72c50)
+++ uspace/drv/bus/usb/xhci/commands.c	(revision 1f76b7d62fc48c175fedb953696d100ebe43f4ae)
@@ -88,5 +88,5 @@
 			break;
 	}
-	fibril_mutex_lock(&cmd->completed_mtx);
+	fibril_mutex_unlock(&cmd->completed_mtx);
 
 	return rv;