linux-bluetooth Weekly Report - Week 23
Total messages: 299 (190 human, 109 CI/bot)
Weekly Report: linux-bluetooth Mailing List - February 9 - 13, 2026 (Week 07)
13 February 2026
Total messages: 175
Summary
An active week on the linux-bluetooth mailing list with 175 messages covering kernel bug fixes, BlueZ userspace patches, new hardware support, build system overhaul, and community announcements.
Key Patch Series & Discussions
Kernel Patches
| Topic | From | Affiliation | Status/Notes |
|---|---|---|---|
| L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ | Luiz Augusto von Dentz | Intel | v1 posted Feb 13 |
| L2CAP: Fix response to L2CAP_ECRED_CONN_REQ | Luiz Augusto von Dentz | Intel | v1 posted Feb 11, accepted |
| L2CAP: Fix result of L2CAP_ECRED_CONN_RSP when MTU is too short | Luiz Augusto von Dentz | Intel | v3 posted Feb 10, accepted |
| Fix CIS host feature condition | Mariusz Skamra | Codecoup | v1 & v2 Feb 12, review from Greg KH and Paul Menzel |
| mgmt: Fix heap overflow and race condition in mesh handling | Maiquel Paiva | Independent | Rapid iteration: v5 through v8 posted Feb 13 |
| hci_qca: Fix confusing shutdown()/power_off() naming + Fix BT not powered-off on rmmod | Hans de Goede | Qualcomm | 2-patch series, Feb 12, review from Paul Menzel |
| Bluetooth: purge error queues in socket destructors | Heitor Alves de Siqueira | Igalia | v1 posted Feb 11, accepted |
| fix use-after-free in hci_conn_drop | Masahiro Kawada | Independent | Posted Feb 9, discussion with Hillf Danton |
| btbcm: Add entry for BCM4343A2 UART Bluetooth | Marek Vasut | NablaDev | Posted Feb 9, review from Paul Menzel |
| qca: Refactor code on the basis of chipset names | Vivek Sahu | Qualcomm | v1 posted Feb 10, accepted, reviewed by Dmitry Baryshkov |
| qca: add QCC2072 support | Vivek Sahu | Qualcomm | v2-v3 posted Feb 9, reviews from Dmitry Baryshkov, Bartosz Golaszewski, Krzysztof Kozlowski |
| btusb: MT7922 Add VID/PID 0e8d/223c + MT7925 Add VID/PID 0e8d/8c38 | Chris Lu | MediaTek | 2-patch series, Feb 13 |
| RFC: remove all PCMCIA drivers | Ethan Nelson-Moore | Independent | RFC posted Feb 11, discussion with Luiz, Dominik Brodowski, Christophe Leroy |
| driver core: Make deferred_probe_timeout default a Kconfig option | Hans de Goede | Qualcomm | Cross-subsystem, Feb 12 |
BlueZ Userspace Patches
| Topic | From | Affiliation | Status/Notes |
|---|---|---|---|
| bass: Fix crash if setup is freed before bass_bcode_req response | Luiz Augusto von Dentz | Intel | v1 posted Feb 12, accepted & merged |
| doc/btmon: Add reading output section | Luiz Augusto von Dentz | Intel | v1 posted Feb 12, accepted & merged |
| client: Add mgmt.exp-iso command | Luiz Augusto von Dentz | Intel | v1 (2 patches) posted Feb 10, accepted & merged |
| adapter: Add btd_adapter_send_cmd_event_sync | Luiz Augusto von Dentz | Intel | v1 posted Feb 9, accepted & merged |
| bap: Fix use-after-free in broadcast sink cleanup | Sarveshwar Bajaj | NXP | v1 posted Feb 13, reviewed by Pauli Virtanen |
| emulator: Fix compilation on big endian systems | Bastien Nocera | Red Hat | v2 posted Feb 10, accepted & merged; review from Pauli Virtanen |
| shared/util: Add byte-swapping macros for constants | Bastien Nocera | Red Hat | Posted Feb 9 (companion to big-endian fix) |
| Add meson build system and HTML docs (v8, 15 patches) | Bastien Nocera | Red Hat | Major series posted Feb 11 covering: meson build, libell wrap, systemd deps, tool installation, emulator install, disable-bluetoothd option, concurrent tests, profile/gdbus conditionals, docs deployment, GATT docs |
| tools/btpclient: Add GATT support to get Device name | Frederic Danis | Collabora | v1 and v2 posted Feb 11 |
| gatt-client: Implement error handling for DB_OUT_OF_SYNC in GATT caching | Mengshi Wu | Qualcomm | v4 posted Feb 10 |
Build & Infrastructure
- 5.86 build failure reported by Bastien Nocera (Red Hat) on Feb 9, related to library version update
- bluetooth-next BUILD SUCCESS notifications from kernel test robot (Feb 10, Feb 12)
- kernel test robot flagged build issues in QCC2072 v2 patches (Feb 10)
- Patchwork bot sent acceptance notifications for 10+ patches throughout the week
Community
- BlueZ Face-to-Face Meetup announced by George Kiagiadakis (Collabora): Nice, France, May 30-31, 2026 (posted Feb 10-11)
- SIG-Qualification discussion: Christian Eggers (ARRI) raised problems with setting TSPC_L2CAP_4_3; Luiz responded Feb 13
- GATT test questions: Christian Eggers (ARRI) asked about running GATT/SR/GAI/BV-01-C and BV-02-C tests; Luiz responded Feb 11
Bug Reports
- Bugzilla #220815: Request to add Realtek RTL8852CE device ID (13d3:3612)
Top Contributors (by message count)
| Contributor | Affiliation | Messages |
|---|---|---|
| Luiz Augusto von Dentz | Intel | ~20 |
| bluez.test.bot (CI) | BlueZ CI | ~20 |
| Bastien Nocera | Red Hat | ~18 |
| patchwork-bot+bluetooth | kernel.org | ~12 |
| Maiquel Paiva | Independent | ~10 |
| Vivek Sahu | Qualcomm | ~10 |
| Frederic Danis | Collabora | ~4 |
| Hans de Goede | Qualcomm | ~4 |
| Mariusz Skamra | Codecoup | ~3 |
| Dmitry Baryshkov | Linaro | ~3 |
| Masahiro Kawada | Independent | ~3 |
| Christian Eggers | ARRI | ~3 |
| Sarveshwar Bajaj | NXP | ~3 |
| Chris Lu | MediaTek | ~2 |
| Mengshi Wu | Qualcomm | ~2 |
| George Kiagiadakis | Collabora | ~2 |
| Marek Vasut | NablaDev | ~2 |
| Hillf Danton | Independent | ~2 |
| Heitor Alves de Siqueira | Igalia | ~1 |
| Ethan Nelson-Moore | Independent | ~1 |
Merged to master (BlueZ)
Commits pushed to bluez/bluez master during this period:
adapter: Add btd_adapter_send_cmd_event_sync– Bastien Nocera (Red Hat)client: Add mgmt.exp-iso command– Luiz Augusto von Dentz (Intel)bass: Fix crash if setup is freed before bass_bcode_req response– Luiz Augusto von Dentz (Intel)doc/btmon: Add reading output section– Luiz Augusto von Dentz (Intel)
Company Focus Areas
Intel
Maintainer-driven work across the full stack. On the kernel side, focused on L2CAP protocol correctness, fixing key size checks, ECRED connection request/response handling, and MTU validation. On the BlueZ userspace side, work targeted LE Audio / ISO support (new mgmt.exp-iso command), BASS broadcast stability (crash fix), btmon documentation, and adapter command synchronization improvements. Intel remains the primary driver of both kernel subsystem maintenance and BlueZ upstream development.
Red Hat
Major effort on build system modernization, submitting v8 of a 15-patch meson build system series – the largest single contribution this week. This covers meson wraps, systemd dependency separation, conditional builds, concurrent test execution, and HTML documentation generation/deployment. Additionally contributed portability fixes (big-endian compilation, byte-swapping macros) and reported the 5.86 build failure.
Qualcomm
Active across multiple fronts. New hardware enablement with QCC2072 chipset support (v2-v3) and QCA driver refactoring by chipset names. Driver reliability with hci_qca shutdown/power-off naming cleanup and BT power-off on rmmod fix. GATT caching improvements with DB_OUT_OF_SYNC error handling. Also contributed a cross-subsystem patch for deferred probe timeout configuration.
Collabora
Focused on BTP (Bluetooth Test Protocol) tooling, adding GATT Device Name support to btpclient. Also organized the BlueZ Face-to-Face Meetup in Nice, France for May 2026, driving community engagement.
Codecoup
Working on LE Audio conformance, fixing the CIS host feature condition check in the kernel (v1 and v2 after review feedback from Greg KH).
NXP
Addressed broadcast audio stability with a use-after-free fix in BAP broadcast sink cleanup.
MediaTek
Submitted new USB device IDs for MT7922 (0e8d/223c) and MT7925 (0e8d/8c38), expanding hardware support for MediaTek Bluetooth chipsets.
Igalia
Contributed a socket layer fix, purging error queues in Bluetooth socket destructors to prevent resource leaks.
ARRI
Engaged in SIG qualification testing, raising issues with TSPC_L2CAP_4_3 settings and asking about GATT server test procedures (GAI/BV-01-C and BV-02-C).
NablaDev
Submitted a Broadcom hardware enablement patch adding BCM4343A2 UART Bluetooth support.
Linaro
Participated as a reviewer, providing feedback on Qualcomm’s QCC2072 enablement patches.
Notable Trends
- Security & stability focus: Multiple use-after-free fixes (BAP broadcast, hci_conn_drop), heap overflow fix in mesh handling, L2CAP protocol correctness fixes
- Build system modernization: Bastien Nocera’s meson build series reached v8 with 15 patches – a significant effort to provide an alternative to autotools
- Hardware enablement: QCC2072 (Qualcomm), MT7922/MT7925 (MediaTek), BCM4343A2 (Broadcom), RTL8852CE (Realtek) device IDs
- PCMCIA removal RFC: Discussion on removing legacy PCMCIA Bluetooth drivers from the kernel
- Community building: Face-to-face meetup announced for May 2026 in Nice, France