Upgrading to SQL Server 2014 SP3 _ Clarifications help needed

We have SQL Server 2014 SP2 GDR with below: 1. Availability Groups 2. TDE enabled for structured data 3. EFS enabled for unstructured data Now the DBs are with AOAGs and encrypted , I am planning to upgrade current SQL Server 2014 SP2 GDR to SQL Server 2014 SP3. Can anyone help me with any issues / pre-requisites or anything that can happen adversely. Though I am planning first upgrade DEVELOPMENT / STAGING , please share your thoughts as I need to upgrade my PROD . I am little worried as the DBs are with TDE + EFS . Does encryption has any linkage with SP3 upgrade.