Changing the name in Passport

[sabarish2u]

All ,

Due to a clerical error , my First name and Give Name in the passport is as given below

First Name :- Sankara Pillai
Last Name :- Sabarish Sathasivan

I have a B1 visa issued in this name which is valid till May 2017... However my original name is


First Name :- Sabarish Sathasivan
Last Name :- Sankara Pillai

I am planning to change my name in the passport. So will my visa become invalid and should i need to apply for a fresh Visa

Regards
Sabarish