diff options
Diffstat (limited to 'extras/mini-os/tpmback.c')
| -rw-r--r-- | extras/mini-os/tpmback.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/extras/mini-os/tpmback.c b/extras/mini-os/tpmback.c index d68ad2b876..9917765133 100644 --- a/extras/mini-os/tpmback.c +++ b/extras/mini-os/tpmback.c @@ -645,6 +645,24 @@ error_post_map: return -1; } +static void disconnect_fe(tpmif_t* tpmif) +{ + if (tpmif->status == CONNECTED) { + tpmif->status = DISCONNECTING; + mask_evtchn(tpmif->evtchn); + + if(gntmap_munmap(>pmdev.map, (unsigned long)tpmif->page, 1)) { + TPMBACK_ERR("%u/%u Error occured while trying to unmap shared page\n", (unsigned int) tpmif->domid, tpmif->handle); + } + + unbind_evtchn(tpmif->evtchn); + } + tpmif->status = DISCONNECTED; + tpmif_change_state(tpmif, XenbusStateInitWait); + + TPMBACK_LOG("Frontend %u/%u disconnected\n", (unsigned int) tpmif->domid, tpmif->handle); +} + static int frontend_changed(tpmif_t* tpmif) { int state = xenbus_read_integer(tpmif->fe_state_path); @@ -671,8 +689,11 @@ static int frontend_changed(tpmif_t* tpmif) tpmif_change_state(tpmif, XenbusStateClosing); break; - case XenbusStateUnknown: /* keep it here */ case XenbusStateClosed: + disconnect_fe(tpmif); + break; + + case XenbusStateUnknown: /* keep it here */ free_tpmif(tpmif); break; |