Date: Mon, 19 Sep 2016 07:32:08 +0000 (UTC) From: Sepherosa Ziehau <sephe@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r305965 - head/sys/dev/hyperv/netvsc Message-ID: <201609190732.u8J7W8wa037901@repo.freebsd.org>
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Author: sephe Date: Mon Sep 19 07:32:08 2016 New Revision: 305965 URL: https://svnweb.freebsd.org/changeset/base/305965 Log: hyperv/hn: Don't allow MTU change, if it is not supported by the NVS. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7923 Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Mon Sep 19 07:17:43 2016 (r305964) +++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Mon Sep 19 07:32:08 2016 (r305965) @@ -1572,6 +1572,13 @@ hn_ioctl(struct ifnet *ifp, u_long cmd, HN_LOCK(sc); + if ((sc->hn_caps & HN_CAP_MTU) == 0) { + /* Can't change MTU */ + HN_UNLOCK(sc); + error = EOPNOTSUPP; + break; + } + if (ifp->if_mtu == ifr->ifr_mtu) { HN_UNLOCK(sc); break;
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