Date: Fri, 30 Sep 2016 06:30:16 +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: r306483 - head/sys/dev/hyperv/netvsc Message-ID: <201609300630.u8U6UGFr097908@repo.freebsd.org>
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Author: sephe Date: Fri Sep 30 06:30:16 2016 New Revision: 306483 URL: https://svnweb.freebsd.org/changeset/base/306483 Log: hyperv/hn: Fix detach and attach error handling. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8066 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 Fri Sep 30 06:21:00 2016 (r306482) +++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Sep 30 06:30:16 2016 (r306483) @@ -352,6 +352,7 @@ static void hn_resume(struct hn_softc *) static void hn_rx_drain(struct vmbus_channel *); static void hn_tx_resume(struct hn_softc *, int); static void hn_tx_ring_qflush(struct hn_tx_ring *); +static int netvsc_detach(device_t dev); static void hn_nvs_handle_notify(struct hn_softc *sc, const struct vmbus_chanpkt_hdr *pkt); @@ -739,27 +740,28 @@ netvsc_attach(device_t dev) return (0); failed: - /* TODO: reuse netvsc_detach() */ - hn_destroy_tx_data(sc); - if (ifp != NULL) - if_free(ifp); + if (sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) + hn_synth_detach(sc); + netvsc_detach(dev); return (error); } -/* - * TODO: Use this for error handling on attach path. - */ static int netvsc_detach(device_t dev) { struct hn_softc *sc = device_get_softc(dev); + struct ifnet *ifp = sc->hn_ifp; - /* TODO: ether_ifdetach */ - - HN_LOCK(sc); - /* TODO: hn_stop */ - hn_synth_detach(sc); - HN_UNLOCK(sc); + if (device_is_attached(dev)) { + HN_LOCK(sc); + if (sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) { + if (ifp->if_drv_flags & IFF_DRV_RUNNING) + hn_stop(sc); + hn_synth_detach(sc); + } + HN_UNLOCK(sc); + ether_ifdetach(ifp); + } ifmedia_removeall(&sc->hn_media); hn_destroy_rx_data(sc); @@ -768,10 +770,12 @@ netvsc_detach(device_t dev) if (sc->hn_tx_taskq != hn_tx_taskq) taskqueue_free(sc->hn_tx_taskq); - vmbus_xact_ctx_destroy(sc->hn_xact); - HN_LOCK_DESTROY(sc); + if (sc->hn_xact != NULL) + vmbus_xact_ctx_destroy(sc->hn_xact); - /* TODO: if_free */ + if_free(ifp); + + HN_LOCK_DESTROY(sc); return (0); }
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