svn commit: r324798 - stable/10/sys/dev/usb

[Hans Petter Selasky]

Author: hselasky
Date: Fri Oct 20 10:01:21 2017
New Revision: 324798
URL: https://svnweb.freebsd.org/changeset/base/324798

Log:
  MFC r323916:
  Extend sysctl description for hw.usb.disable_enumeration .
  
  PR:		222505
  Submitted by:	Julian H. Stacey <jhs at berklix.com>
  Sponsored by:	Mellanox Technologies

Modified:
  stable/10/sys/dev/usb/usb_hub.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/dev/usb/usb_hub.c
==============================================================================
--- stable/10/sys/dev/usb/usb_hub.c	Fri Oct 20 09:59:39 2017	(r324797)
+++ stable/10/sys/dev/usb/usb_hub.c	Fri Oct 20 10:01:21 2017	(r324798)
@@ -101,7 +101,9 @@ SYSCTL_INT(_hw_usb, OID_AUTO, power_timeout, CTLFLAG_R
 #if USB_HAVE_DISABLE_ENUM
 static int usb_disable_enumeration = 0;
 SYSCTL_INT(_hw_usb, OID_AUTO, disable_enumeration, CTLFLAG_RWTUN,
-    &usb_disable_enumeration, 0, "Set to disable all USB device enumeration.");
+    &usb_disable_enumeration, 0, "Set to disable all USB device enumeration. "
+	"This can secure against USB devices turning evil, "
+	"for example a USB memory stick becoming a USB keyboard.");
 TUNABLE_INT("hw.usb.disable_enumeration", &usb_disable_enumeration);
 
 static int usb_disable_port_power = 0;