Month 2026-01: Implemented targeted BPF compilation fixes for HID driver and HID selftests to enable reliable vmlinux.h header inclusion and build stability with modern toolchains. These changes reduce downstream build failures, improve hardware HID reliability, and pave the way for upstream submission.

October 2025: Linux HID multitouch stability improvements in linux-riscv/linux for Dell Synaptics DLL0945 touchpad. Fixed touch slot release handling when firmware fails to release, improving reliability of slot state tracking and reducing false multitouch artifacts. Added regression tests covering missing release scenarios to strengthen future changes. These updates enhance hardware compatibility and input reliability for enterprise deployments.

September 2025 monthly summary for linux-riscv/linux: Delivered targeted improvements to Hidraw IOCTL robustness within the HID subsystem, coupled with expanded test coverage and hardened command parsing. These changes reduce the risk of malformed or malicious ioctl usage and improve overall reliability for the Linux HID interface on riscv. Key features delivered: - Hidraw IOCTL robustness and test coverage improvements (kernel-level enhancements to parsing of variable-length commands and enforcing correct data direction checks). Major bugs fixed / issues addressed: - Tightened ioctl command parsing to close potential misuse vectors and added tests to guard against malformed commands. Overall impact and accomplishments: - Increased reliability and security of the HID interface on linux-riscv/linux. - Higher confidence in production deployments due to expanded self-tests and stronger input validation. Technologies/skills demonstrated: - C kernel development, HID subsystem, selftests, test-driven development, code refactoring for robustness, security-focused testing.

2025-07 monthly summary for geerlingguy/linux: HID subsystem improvements focusing on test modernization and core robustness. Delivered cross-version HID self-tests aligned with hid-tools 0.8/0.10, refactored tests using dataclasses, removed an unused parameter, and added a vulnerability-focused test to speed coverage and reduce runtime. Implemented HID Core robustness fixes to ensure hid_hw_raw_request is invoked for parameter validation, corrected report ID handling and buffer allocation to prevent data corruption, and prevented bypass of hid_hw_raw_request. Also performed test hygiene improvements (ruff formatting) on Python tests. These changes increase reliability of HID paths, improve test coverage, and speed feedback for HID-related changes.