Worked on the geerlingguy/linux repository to address a reliability issue in the storage subsystem by fixing CDL enable and disable functionality under NCQ workloads. The solution involved removing redundant ATA_DFLAG_CDL_ENABLED checks, which previously blocked SET FEATURES commands when NCQ commands were active, and instead relied on the existing scsi_cdl_enable() logic to manage CDL state. This targeted kernel driver patch, implemented in C, improved SATA and NCQ interactions by reducing command failures and the need for manual intervention in production environments. The work demonstrated expertise in device drivers, kernel development, and low-level programming, focusing on robust, maintainable code changes.