Newly installed features after SP2 are older version. Can I run SP2 again without stopping database?

All,

I have a SQL 2008 R2 SP2 (10.50.4000) server running in production for some time.  I'm setting up a new application (DPM 2012 R2) which requires Reporting services be installed on the database server.  I installed the feature today on the SQL server, but it's running at version 10.00.1600.

I need reporting services to be at SP2 for DPM to install.  If I were to run the SQL server SP2 patch again, will I have to reboot or stop the production databases?

Thanks.