- /*
- * Lock subscriber's server port (& make a local copy of lock pointer,
- * in case subscriber is deleted while processing subscription request)
- */
- if (tipc_port_lock(port_ref) == NULL)
- return;
-
- subscriber_lock = subscriber->lock;
-
- if (size != sizeof(struct tipc_subscr)) {
- subscr_terminate(subscriber);
- spin_unlock_bh(subscriber_lock);
- } else {
- sub = subscr_subscribe((struct tipc_subscr *)data, subscriber);
- spin_unlock_bh(subscriber_lock);
- if (sub != NULL) {
-
- /*
- * We must release the server port lock before adding a
- * subscription to the name table since TIPC needs to be
- * able to (re)acquire the port lock if an event message
- * issued by the subscription process is rejected and
- * returned. The subscription cannot be deleted while
- * it is being added to the name table because:
- * a) the single-threading of the native API port code
- * ensures the subscription cannot be cancelled and
- * the subscriber connection cannot be broken, and
- * b) the name table lock ensures the subscription
- * timeout code cannot delete the subscription,
- * so the subscription object is still protected.
- */
- tipc_nametbl_subscribe(sub);
- }
- }
+ spin_lock_bh(&subscriber->lock);
+ sub = subscr_subscribe((struct tipc_subscr *)buf, subscriber);
+ if (sub)
+ tipc_nametbl_subscribe(sub);
+ spin_unlock_bh(&subscriber->lock);