[src/trunk]: src/sys/dev/ic Avoid division by zero when computing the link-lo...

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

details:   https://anonhg.NetBSD.org/src/rev/d155a23aded4
branches:  trunk
changeset: 558145:d155a23aded4
user:      dyoung <dyoung%NetBSD.org@localhost>
date:      Thu Jan 29 10:01:14 2004 +0000

description:
Avoid division by zero when computing the link-lost lost-beacons
threshold.

diffstat:

 sys/dev/ic/atw.c |  12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diffs (33 lines):

diff -r ecdc9fc93585 -r d155a23aded4 sys/dev/ic/atw.c
--- a/sys/dev/ic/atw.c  Thu Jan 29 09:59:57 2004 +0000
+++ b/sys/dev/ic/atw.c  Thu Jan 29 10:01:14 2004 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: atw.c,v 1.20 2004/01/29 09:59:57 dyoung Exp $  */
+/*     $NetBSD: atw.c,v 1.21 2004/01/29 10:01:14 dyoung Exp $  */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2002, 2003, 2004 The NetBSD Foundation, Inc.
@@ -41,7 +41,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: atw.c,v 1.20 2004/01/29 09:59:57 dyoung Exp $");
+__KERNEL_RCSID(0, "$NetBSD: atw.c,v 1.21 2004/01/29 10:01:14 dyoung Exp $");
 
 #include "bpfilter.h"
 
@@ -1961,9 +1961,11 @@
         */
        if (ic->ic_opmode == IEEE80211_M_HOSTAP)
                lost_bcn_thresh = 0;
-       else
-               lost_bcn_thresh = MAX(2,
-                   MIN(1000000/(IEEE80211_DUR_TU * ic->ic_bss->ni_intval), 7));
+       else {
+               int beacons_per_second =
+                   1000000 / (IEEE80211_DUR_TU * MAX(1,ic->ic_bss->ni_intval));
+               lost_bcn_thresh = MAX(2, MIN(7, beacons_per_second));
+       }
 
        /* XXX resets wake-up status bits */
        ATW_WRITE(sc, ATW_WCSR,