[src/trunk]: src/sys/dev/usb Fix a bug that IFF_ALLMULTI is almost always set.

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

details:   https://anonhg.NetBSD.org/src/rev/2676ecd9a6e7
branches:  trunk
changeset: 466918:2676ecd9a6e7
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Mon Jan 06 15:19:00 2020 +0000

description:
Fix a bug that IFF_ALLMULTI is almost always set.

diffstat:

 sys/dev/usb/if_mos.c |  13 +++++--------
 1 files changed, 5 insertions(+), 8 deletions(-)

diffs (56 lines):

diff -r 0a80b56f5f3d -r 2676ecd9a6e7 sys/dev/usb/if_mos.c
--- a/sys/dev/usb/if_mos.c      Mon Jan 06 13:21:18 2020 +0000
+++ b/sys/dev/usb/if_mos.c      Mon Jan 06 15:19:00 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_mos.c,v 1.1 2019/09/20 10:34:54 mrg Exp $   */
+/*     $NetBSD: if_mos.c,v 1.2 2020/01/06 15:19:00 msaitoh Exp $       */
 /*     $OpenBSD: if_mos.c,v 1.40 2019/07/07 06:40:10 kevlo Exp $       */
 
 /*
@@ -72,7 +72,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_mos.c,v 1.1 2019/09/20 10:34:54 mrg Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_mos.c,v 1.2 2020/01/06 15:19:00 msaitoh Exp $");
 
 #include <sys/param.h>
 
@@ -472,17 +472,15 @@
        rxmode = mos_reg_read_1(un, MOS_CTL);
        rxmode &= ~(MOS_CTL_ALLMULTI | MOS_CTL_RX_PROMISC);
 
-       if (ifp->if_flags & IFF_PROMISC || ec->ec_multicnt > 0) {
+       ETHER_LOCK(ec);
+       if (ifp->if_flags & IFF_PROMISC) {
 allmulti:
-               ETHER_LOCK(ec);
                ec->ec_flags |= ETHER_F_ALLMULTI;
-               ETHER_UNLOCK(ec);
                rxmode |= MOS_CTL_ALLMULTI;
                if (ifp->if_flags & IFF_PROMISC)
                        rxmode |= MOS_CTL_RX_PROMISC;
        } else {
                /* now program new ones */
-               ETHER_LOCK(ec);
                ec->ec_flags &= ~ETHER_F_ALLMULTI;
 
                ETHER_FIRST_MULTI(step, ec, enm);
@@ -490,7 +488,6 @@
                        if (memcmp(enm->enm_addrlo, enm->enm_addrhi,
                            ETHER_ADDR_LEN)) {
                                memset(hashtbl, 0, sizeof(hashtbl));
-                               ETHER_UNLOCK(ec);
                                goto allmulti;
                        }
                        h = ether_crc32_be(enm->enm_addrlo,
@@ -499,8 +496,8 @@
 
                        ETHER_NEXT_MULTI(step, enm);
                }
-               ETHER_UNLOCK(ec);
        }
+       ETHER_UNLOCK(ec);
 
        /* 
         * The datasheet claims broadcast frames were always accepted