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claude-noether 6ab61b9a06 danctnix-besser-pkgbuild: linux-pinetab2-danctnix-besser PKGBUILD + cumulative bes2600 patch

Soft-upstream candidate for DanctNIX.  Drop-in replacement for
linux-pinetab2 carrying the BESser bes2600 staging-driver patchset
(16 squashed commits from marfrit/bes2600-dkms cleanups branch,
adapted to danctnix-flavor).

Layout:
  README.md                                                — overview
  kernel/PKGBUILD                                           — patched fork of pine64/linux-pinetab2/PKGBUILD
  kernel/config                                             — danctnix kernel config (unchanged)
  kernel/0001-bes2600-besser-cumulative-series.patch        — 172 KB cumulative diff

Net diff vs danctnix v7.0-danctnix1: 48 files, +1426 / -2003 in
drivers/staging/bes2600/.

Squashed series:
  c5.1, c5.1.1, c5.2, c6.1, c6.2, c7, c5.2.1   (c-stack: scan-defer,
                                                PM-state-resync,
                                                firmware-PSM-skip,
                                                multi-func SDIO rescan)
  Patch A (decrypt-storm fast-recover)
  Patch B (connection-loss bus_reset)
  Patch F (cw1200 mainline backports)
  Patch C v3 (drop sdio_rx_work relay)
  Patch G (SPDX + ST-Ericsson attribution)
  Patch D (ba_lock atomicization)
  Patch E (ps_state_lock skip)
  Patch C2 (ieee80211_rx_irqsafe -> ieee80211_rx_ni)
  Patch H (bh.c hygiene cleanup)

Phase 7 on Mobian DKMS: +67% throughput vs Patch B baseline; race-fix
verified under stress.  Danctnix-flavor build verification deferred
to PKGBUILD CI.

See danctnix-besser-pkgbuild/README.md for full provenance.

2026-05-08 10:11:32 +02:00

4.3 KiB

Raw Blame History

linux-pinetab2-danctnix-besser

Soft-upstream fork of linux-pinetab2 (DanctNIX kernel for PineTab2) carrying the BESser bes2600 staging-driver patchset.

Drop-in replacement for linux-pinetab2. Same kernel version, same config, same modules — only the drivers/staging/bes2600/ driver differs.

What's in the patchset

A 16-commit cumulative diff over v7.0-danctnix1's in-tree drivers/staging/bes2600/, capturing:

group	what it does
c-stack (Patches A, B, c5.1–c5.2.1, c6.1, c6.2, c7)	wifi-stability fixes: decrypt-storm fast-recover, connection-loss bus-reset, scan-defer-on-firmware-reject, PM state resync, firmware-doesn't-honour-PSM self-detect, multi-function SDIO `mmc_hw_reset` rescan
Patch F	cw1200 mainline backports: hw_scan SKB-lifecycle UAF, init_common destroy_workqueue on error, `atomic_add(1, x) → atomic_inc(x)` cosmetic
Patch C v3	structural: drop `sdio_rx_work` workqueue relay; IRQ → bh-direct architecture (matches mainline cw1200)
Patch G	GPL-2.0 §1 attribution restoration: SPDX-License-Identifier on every file, Tarnyagin/ST-Ericsson Copyright restored on cw1200-derived files
Patch D	`ba_lock` removed; `ba_acc/ba_cnt/ba_acc_rx/ba_cnt_rx/ba_ena` converted to `atomic_t`; per-RX-frame spinlock eliminated
Patch E	per-RX-frame `ps_state_lock` skipped when c7's `pm_unsupported` latch is on (steady-state on production firmware)
Patch C2	`ieee80211_rx_irqsafe → ieee80211_rx_ni` at all 6 sites (kernel.org-clean process-context API; tasklet hop removed)
Patch H	bh.c hygiene cleanup: 76-line + 468-line `#if 0` cw1200-ancestor fossil blocks removed; `__bes2600_irq_enable` stub removed; per-iteration `BUG_ON` → `WARN_ON_ONCE`

Measured outcome (Mobian-flavor verification, expected to carry over)

Phase 7 N=3 stress @ 4 MB/s sender on RK3566/PineTab2:
- Patch B baseline: 1.36 MB/s
- Patch C v3 + F + G + D + E + C2 + H: 2.28 MB/s sustained, +67% over baseline
Race-fix verified under stress (no wsm_release_tx_buffer WARN storm under load)
Module loads + associates cleanly; pm_unsupported latch fires on boot as expected
Build clean with no warnings, srcversion 99052D7… (Mobian-flavor) / TBD on first danctnix build

Provenance

Mobian-flavor source-of-truth: https://git.reauktion.de/marfrit/bes2600-dkms (cleanups branch)
Per-patch breakdown + Phase 7 results: https://git.reauktion.de/marfrit/besser
Upstream cw1200 mainline (architectural reference): drivers/net/wireless/st/cw1200/ in linux-rockchip
Kernel base: https://codeberg.org/DanctNIX/linux-pinetab2 tag v7.0-danctnix1

Why it's "BESser"

"Besser" = German for "better." Patch series ID across both DKMS (Mobian) and in-tree (Danctnix) trees. Single source-of-truth lives in marfrit/bes2600-dkms; this PKGBUILD is the danctnix-flavor consumption surface.

Building

makepkg -s

Identical workflow to upstream linux-pinetab2. Flash the resulting .pkg.tar.zst via pacman -U. Reboot to load.

Soft-upstream intent

Submitting this PKGBUILD to DanctNIX for review. If accepted as a replacement for linux-pinetab2 (or sidegrade), the BESser patchset ships to all PineTab2 users via the regular danctnix package update channel. The bes2600 driver gets:

~2× sustained RX throughput
Race-correctness on the hot path
GPL-2.0 §1 attribution compliance
Modern kernel API (no deprecated from_timer, no _irqsafe from process context, no BUG_ON in steady-state)

Drop-in compatibility: same kernel version, same module names, no userspace ABI change.

Maintenance plan

New danctnix kernel release → rebase BESser patch onto the new tag, regenerate cumulative diff, bump pkgver
New BESser patch on Mobian DKMS → re-overlay + re-flavor + regenerate cumulative diff
Both flavors continue to be maintained in lockstep via marfrit/bes2600-dkms source-of-truth

Known gaps

Single cumulative diff (squashed 16 commits) for now. Per-patch series can be regenerated if danctnix maintainers prefer.
Bluetooth-side bes2600_btuart is independent and untouched by this patchset.
bes2600_switch_bt orchestration removed (Mobian-only entry point; not used in danctnix tree).

Author

Markus Fritsche fritsche.markus@gmail.com

Built collaboratively with Claude Opus 4.7 (1M context).

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