[src/trunk]: src/sys/dev/usb Avoid null reference, from Nick Hibma, FreeBSD.

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

details:   https://anonhg.NetBSD.org/src/rev/fd70f0de6b96
branches:  trunk
changeset: 475985:fd70f0de6b96
user:      augustss <augustss%NetBSD.org@localhost>
date:      Thu Sep 02 18:13:50 1999 +0000

description:
Avoid null reference, from Nick Hibma, FreeBSD.

diffstat:

 sys/dev/usb/uhub.c |  16 +++++++++-------
 1 files changed, 9 insertions(+), 7 deletions(-)

diffs (30 lines):

diff -r ff82dd4aaef5 -r fd70f0de6b96 sys/dev/usb/uhub.c
--- a/sys/dev/usb/uhub.c        Thu Sep 02 18:11:41 1999 +0000
+++ b/sys/dev/usb/uhub.c        Thu Sep 02 18:13:50 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uhub.c,v 1.24 1999/08/28 21:42:35 augustss Exp $       */
+/*     $NetBSD: uhub.c,v 1.25 1999/09/02 18:13:50 augustss Exp $       */
 
 /*
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -466,12 +466,14 @@
                return;
        }
 
-       hubname = USBDEVNAME(*up->parent->subdevs[0]);
-       for (i = 0; dev->subdevs[i]; i++) {
-               printf("%s: at %s port %d (addr %d) disconnected\n",
-                      USBDEVNAME(*dev->subdevs[i]), hubname,
-                      up->portno, dev->address);
-               config_detach(dev->subdevs[i], DETACH_FORCE);
+       if (dev->subdevs) {
+               hubname = USBDEVNAME(*up->parent->subdevs[0]);
+               for (i = 0; dev->subdevs[i]; i++) {
+                       printf("%s: at %s port %d (addr %d) disconnected\n",
+                              USBDEVNAME(*dev->subdevs[i]), hubname,
+                              up->portno, dev->address);
+                       config_detach(dev->subdevs[i], DETACH_FORCE);
+               }
        }
 
        dev->bus->devices[dev->address] = 0;