diff options
Diffstat (limited to 'xen/common/event_channel.c')
| -rw-r--r-- | xen/common/event_channel.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/xen/common/event_channel.c b/xen/common/event_channel.c index 0c0bbe494f..34efd24bb9 100644 --- a/xen/common/event_channel.c +++ b/xen/common/event_channel.c @@ -168,10 +168,14 @@ static int get_free_port(struct domain *d) return -EINVAL; for ( port = 0; port_is_valid(d, port); port++ ) + { + if ( port > d->max_evtchn_port ) + return -ENOSPC; if ( evtchn_from_port(d, port)->state == ECS_FREE ) return port; + } - if ( port == d->max_evtchns ) + if ( port == d->max_evtchns || port > d->max_evtchn_port ) return -ENOSPC; if ( !group_from_port(d, port) ) @@ -1230,6 +1234,7 @@ void evtchn_check_pollers(struct domain *d, unsigned int port) int evtchn_init(struct domain *d) { evtchn_2l_init(d); + d->max_evtchn_port = INT_MAX; d->evtchn = alloc_evtchn_bucket(d, 0); if ( !d->evtchn ) |