QL_DIAG_CMD_TEST_EXT_LOOPBACK
if (mbox_cmd[1] == QL_DIAG_CMD_TEST_EXT_LOOPBACK)
else if (mbox_cmd[1] == QL_DIAG_CMD_TEST_EXT_LOOPBACK)
case QL_DIAG_CMD_TEST_EXT_LOOPBACK: