iscsi_thread_wait
ret = iscsi_thread_wait(thread, tout);
ret = iscsi_thread_wait(thread, -1);
rc = iscsi_thread_wait(thread, SEC_TO_TICK(1));
iscsi_thread_wait(
while (iscsi_thread_wait(thread, -1) != 0) {
while (iscsi_thread_wait(thread, -1) != 0) {
} while (iscsi_thread_wait(thread, -1) != 0);
while (iscsi_thread_wait(thread, -1) != 0) {
rc = iscsi_thread_wait(thread, SEC_TO_TICK(1));