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Code Issues Releases Activity

hyperv/hn: Fix detach and attach error handling.

Browse Source 
MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8066
This commit is contained in:
Sepherosa Ziehau 2016-09-30 06:30:16 +00:00
parent fed9f4df75
commit 2530eba1c4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=306483
1 changed files with 20 additions and 16 deletions
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36
sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
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@ -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);
}