svn commit: r340086 - head/sbin/devd

[Warner Losh]

Author: imp
Date: Fri Nov  2 22:15:30 2018
New Revision: 340086
URL: https://svnweb.freebsd.org/changeset/base/340086

Log:
  Document r226775: tell why we omit usbus[0-9]+
  
  tcpdump can capture packet traces from the usb bus. usbus[0-9] are
  registered as ifnet devices so this can work. When these devices come
  up, devd was trying to run pccard_ether on those interfaces, which
  didn't exist and generated an error.

Modified:
  head/sbin/devd/devd.conf

Modified: head/sbin/devd/devd.conf
==============================================================================
--- head/sbin/devd/devd.conf	Fri Nov  2 22:12:30 2018	(r340085)
+++ head/sbin/devd/devd.conf	Fri Nov  2 22:15:30 2018	(r340086)
@@ -33,7 +33,9 @@ options {
 
 #
 # Configure the interface on attach.  Due to a historical accident, this
-# script is called pccard_ether.
+# script is called pccard_ether. We omit the usbus devices because those
+# devices are assocaited with the USB Bus and provide a tcpdump point
+# to capture USB packets.
 #
 # NB: DETACH events are ignored; the kernel should handle all cleanup
 #     (routes, arp cache).  Beware of races against immediate create