diff options
| -rw-r--r-- | drivers/xen/pvcalls-front.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index 9e40c2cd70b1..40caa92bff33 100644 --- a/drivers/xen/pvcalls-front.c +++ b/drivers/xen/pvcalls-front.c @@ -1041,13 +1041,12 @@ int pvcalls_front_release(struct socket *sock) wake_up_interruptible(&map->active.inflight_conn_req); /* - * Wait until there are no more waiters on the mutexes. - * We know that no new waiters can be added because sk_send_head - * is set to NULL -- we only need to wait for the existing - * waiters to return. + * We need to make sure that sendmsg/recvmsg on this socket have + * not started before we've cleared sk_send_head here. The + * easiest (though not optimal) way to guarantee this is to see + * that no pvcall (other than us) is in progress. */ - while (!mutex_trylock(&map->active.in_mutex) || - !mutex_trylock(&map->active.out_mutex)) + while (atomic_read(&pvcalls_refcount) > 1) cpu_relax(); pvcalls_front_free_map(bedata, map); |