[src/nick-nhusb]: src/sys/dev/usb Add a comment

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b7c3cf0d3489
branches:  nick-nhusb
changeset: 334477:b7c3cf0d3489
user:      skrll <skrll%NetBSD.org@localhost>
date:      Sun Apr 10 15:39:28 2016 +0000

description:
Add a comment

diffstat:

 sys/dev/usb/uhub.c |  10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diffs (38 lines):

diff -r 3a296adbec9a -r b7c3cf0d3489 sys/dev/usb/uhub.c
--- a/sys/dev/usb/uhub.c        Sun Apr 10 15:37:33 2016 +0000
+++ b/sys/dev/usb/uhub.c        Sun Apr 10 15:39:28 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uhub.c,v 1.126.2.24 2016/03/29 08:42:41 skrll Exp $    */
+/*     $NetBSD: uhub.c,v 1.126.2.25 2016/04/10 15:39:28 skrll Exp $    */
 /*     $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $       */
 /*     $OpenBSD: uhub.c,v 1.86 2015/06/29 18:27:40 mpi Exp $ */
 
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uhub.c,v 1.126.2.24 2016/03/29 08:42:41 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uhub.c,v 1.126.2.25 2016/04/10 15:39:28 skrll Exp $");
 
 #include <sys/param.h>
 
@@ -60,7 +60,7 @@
 #ifndef UHUB_DEBUG
 #define uhubdebug 0
 #else
-static int uhubdebug = 0;
+static int uhubdebug = 10;
 
 SYSCTL_SETUP(sysctl_hw_uhub_setup, "sysctl hw.uhub setup")
 {
@@ -671,6 +671,10 @@
                        continue;
                }
 #endif
+               /*
+                * Use the port status from the reset to check for the device
+                * disappearing, the port enable status, and the port speed
+                */
                status = UGETW(up->up_status.wPortStatus);
                change = UGETW(up->up_status.wPortChange);
                DPRINTF("hub %d port %d after reset: s/c=%x/%x",