During July 2025, John Thies focused on stabilizing the USB-C/UCSI stack in the geerlingguy/linux repository by addressing a critical allocation failure in the Cros_ec_ucsi driver. He implemented a targeted bug fix in C, defining both read_cci and poll_cci operations to ensure proper UCSI instance operation and alignment with kernel development conventions. This work improved device compatibility and runtime reliability for USB Type-C port controllers, directly benefiting embedded systems that rely on robust driver support. The patch, merged as commit 300386d117a98961fc1d612d1f1a61997d731b8a, demonstrated depth in kernel and driver development within a complex hardware interface.