if (intf == NULL)
if (IPMI_INVALID_INTERFACE(intf))
static void ipmi_request_event(void){	ipmi_smi_t intf;	int        i;	spin_lock(&interfaces_lock);	for (i = 0; i < MAX_IPMI_INTERFACES; i++) {		intf = ipmi_interfaces[i];		if (intf == NULL)			continue;		intf->handlers->request_events(intf->send_info);	}	spin_unlock(&interfaces_lock);}