--- a/40-gentoo.rules	2015-08-09 03:38:18.000000000 +0300
+++ a/40-gentoo.rules	2018-10-27 09:44:02.852598757 +0300
@@ -1,5 +1,7 @@ 
 # do not edit this file, it will be overwritten on update
 
+ACTION!="add", GOTO="gentoo_end"
+
 # Propably unrequired, check how it is with OSS/OSS4, then remove
 SUBSYSTEM=="snd", GROUP="audio"
 
@@ -8,3 +10,5 @@ 
 
 # Keep this for Linux 2.6.32 support wrt #457868
 SUBSYSTEM=="mem", KERNEL=="null|zero|full|random|urandom", MODE="0666"
+
+LABEL="gentoo_end"