[src/trunk]: src/sys/dev/ic add a comment why IFF_PROMISC is handled separate...

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

details:   https://anonhg.NetBSD.org/src/rev/8a9c86f48e4d
branches:  trunk
changeset: 510393:8a9c86f48e4d
user:      onoe <onoe%NetBSD.org@localhost>
date:      Mon May 28 00:46:35 2001 +0000

description:
add a comment why IFF_PROMISC is handled separately for SIOCSIFFLAGS:
        Handle special case for IFF_PROMISC.  If only IFF_PROMISC
        flag is changed, do not call an_init() to avoid initiating
        reassociation to another access point.  It is really
        helpful for tcpdump(8).

diffstat:

 sys/dev/ic/an.c |  8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diffs (22 lines):

diff -r 9239a4836dc1 -r 8a9c86f48e4d sys/dev/ic/an.c
--- a/sys/dev/ic/an.c   Mon May 28 00:41:14 2001 +0000
+++ b/sys/dev/ic/an.c   Mon May 28 00:46:35 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: an.c,v 1.13 2001/05/24 08:12:28 itojun Exp $   */
+/*     $NetBSD: an.c,v 1.14 2001/05/28 00:46:35 onoe Exp $     */
 /*
  * Copyright (c) 1997, 1998, 1999
  *     Bill Paul <wpaul%ctr.columbia.edu@localhost>.  All rights reserved.
@@ -1040,6 +1040,12 @@
 
        switch (command) {
        case SIOCSIFFLAGS:
+               /*
+                * Handle special case for IFF_PROMISC.  If only IFF_PROMISC
+                * flag is changed, do not call an_init() to avoid initiating
+                * reassociation to another access point.  It is really
+                * helpful for tcpdump(8).
+                */
                if ((ifp->if_flags & sc->an_if_flags &
                    (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) {
                        if (ifp->if_flags & IFF_PROMISC &&