IPoIB: Only handle async events for one port

An asynchronous event carries the port number that the event occurred
on, so there's no reason for an IPoIB interface to process an event
associated with a different local HCA port.
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/ulp/ipoib/ipoib_verbs.c

@@ -259,12 +259,13 @@ void ipoib_event(struct ib_event_handler *handler,
 	struct ipoib_dev_priv *priv =
 		container_of(handler, struct ipoib_dev_priv, event_handler);
 
-	if (record->event == IB_EVENT_PORT_ERR    ||
+	if ((record->event == IB_EVENT_PORT_ERR    ||
 	     record->event == IB_EVENT_PKEY_CHANGE ||
 	     record->event == IB_EVENT_PORT_ACTIVE ||
 	     record->event == IB_EVENT_LID_CHANGE  ||
 	     record->event == IB_EVENT_SM_CHANGE   ||
-	    record->event == IB_EVENT_CLIENT_REREGISTER) {
+	     record->event == IB_EVENT_CLIENT_REREGISTER) &&
+	    record->element.port_num == priv->port) {
 		ipoib_dbg(priv, "Port state change event\n");
 		queue_work(ipoib_workqueue, &priv->flush_task);
 	}