utils/examples: avoid busy waiting on wait for reconnect

Signed-off-by: Peter Lieven <pl@kamp.de>

utils/iscsi-perf.c

@@ -395,6 +395,7 @@ int main(int argc, char *argv[])
 	while (client.in_flight && !client.err_cnt && finished < 2) {
 		pfd[0].fd = iscsi_get_fd(client.iscsi);
 		pfd[0].events = iscsi_which_events(client.iscsi);
+
 		if (proc_alarm) {
 			if (iscsi_get_nops_in_flight(client.iscsi) > MAX_NOP_FAILURES) {
 				iscsi_reconnect(client.iscsi);
@@ -407,6 +408,11 @@ int main(int argc, char *argv[])
 			proc_alarm = 0;
 		}
 
+		if (!pfd[0].events) {
+			sleep(1);
+			continue;
+		}
+
 		if (poll(&pfd[0], 1, -1) < 0) {
 			continue;
 		}