[src/trunk]: src/sys/dev/ic Protect ether_multi list

[ozaki-r <ozaki-r%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/fd6504bef0ec
branches:  trunk
changeset: 455820:fd6504bef0ec
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Mon Apr 15 06:00:04 2019 +0000

description:
Protect ether_multi list

Fix this driver because it can set IFEF_MPSAFE.

diffstat:

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

diffs (49 lines):

diff -r 4dc29c1584b1 -r fd6504bef0ec sys/dev/ic/dwc_gmac.c
--- a/sys/dev/ic/dwc_gmac.c     Mon Apr 15 03:58:29 2019 +0000
+++ b/sys/dev/ic/dwc_gmac.c     Mon Apr 15 06:00:04 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: dwc_gmac.c,v 1.58 2019/03/07 14:02:16 msaitoh Exp $ */
+/* $NetBSD: dwc_gmac.c,v 1.59 2019/04/15 06:00:04 ozaki-r Exp $ */
 
 /*-
  * Copyright (c) 2013, 2014 The NetBSD Foundation, Inc.
@@ -41,7 +41,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(1, "$NetBSD: dwc_gmac.c,v 1.58 2019/03/07 14:02:16 msaitoh Exp $");
+__KERNEL_RCSID(1, "$NetBSD: dwc_gmac.c,v 1.59 2019/04/15 06:00:04 ozaki-r Exp $");
 
 /* #define     DWC_GMAC_DEBUG  1 */
 
@@ -1343,6 +1343,7 @@
        struct ifnet * const ifp = &sc->sc_ec.ec_if;
        struct ether_multi *enm;
        struct ether_multistep step;
+       struct ethercom *ec = &sc->sc_ec;
        uint32_t hashes[2] = { 0, 0 };
        uint32_t ffilt, h;
        int mcnt;
@@ -1362,11 +1363,13 @@
        bus_space_write_4(sc->sc_bst, sc->sc_bsh, AWIN_GMAC_MAC_HTLOW, 0);
        bus_space_write_4(sc->sc_bst, sc->sc_bsh, AWIN_GMAC_MAC_HTHIGH, 0);
 
-       ETHER_FIRST_MULTI(step, &sc->sc_ec, enm);
+       ETHER_LOCK(ec);
+       ETHER_FIRST_MULTI(step, ec, enm);
        mcnt = 0;
        while (enm != NULL) {
                if (memcmp(enm->enm_addrlo, enm->enm_addrhi,
                    ETHER_ADDR_LEN) != 0) {
+                       ETHER_UNLOCK(ec);
                        ffilt |= AWIN_GMAC_MAC_FFILT_PM;
                        ifp->if_flags |= IFF_ALLMULTI;
                        goto special_filter;
@@ -1380,6 +1383,7 @@
                mcnt++;
                ETHER_NEXT_MULTI(step, enm);
        }
+       ETHER_UNLOCK(ec);
 
        if (mcnt)
                ffilt |= AWIN_GMAC_MAC_FFILT_HMC;