svn commit: r323916 - head/sys/dev/usb

[Hans Petter Selasky]

Author: hselasky
Date: Fri Sep 22 08:21:35 2017
New Revision: 323916
URL: https://svnweb.freebsd.org/changeset/base/323916

Log:
  Extend sysctl description for hw.usb.disable_enumeration .
  
  PR:		222505
  Submitted by:	Julian H. Stacey <jhs at berklix.com>
  MFC after:	1 week
  Sponsored by:	Mellanox Technologies

Modified:
  head/sys/dev/usb/usb_hub.c

Modified: head/sys/dev/usb/usb_hub.c
==============================================================================
--- head/sys/dev/usb/usb_hub.c	Fri Sep 22 08:21:14 2017	(r323915)
+++ head/sys/dev/usb/usb_hub.c	Fri Sep 22 08:21:35 2017	(r323916)
@@ -100,7 +100,9 @@ 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.");
 
 static int usb_disable_port_power = 0;
 SYSCTL_INT(_hw_usb, OID_AUTO, disable_port_power, CTLFLAG_RWTUN,