test0r
1b5374d35b
Per Opus structural critique §4.1 (#if 0 graveyard), §4.3 (asm
volatile("nop") placeholder), §4.4 (BUG_ON in steady-state hot
path). Pure source-tree cleanup, no functional change.
Removed:
1. bh.c lines 319-395 (76-line #if 0 block) — dead helper
functions inherited from cw1200 ancestor:
bes2600_bh_read_ctrl_reg, bes2600_get_skb, bes2600_put_skb,
bes2600_device_wakeup. Compiled out for years.
2. bh.c lines 405-873 + line 1659 (the outer #if 0 / #else /
#endif) — 468-line cw1200-ancestor bes2600_bh() function body,
preserved verbatim alongside the active impl. Same function
name, same goto labels. Maintenance hazard removed.
3. bh.c done: label body — `__bes2600_irq_enable(1)` placeholder
(commented out) + `asm volatile ("nop")` filler. Both
no-ops on bes2600 silicon.
4. bh.c post-loop "Explicitly disable device interrupts" block
(sbus lock + __bes2600_irq_enable(0) + sbus unlock) — the
stub call wrapped in lock/unlock ceremony. Dead.
5. hwio.c __bes2600_irq_enable() function definition —
`int __bes2600_irq_enable(int enable) { return 0; }`. Stub.
Removed entirely.
6. sbus.h __bes2600_irq_enable() forward declaration.
Replaced:
7. bh.c bes2600_bh outer-loop BUG_ON(hw_bufs_used > numInpChBufs)
-> WARN_ON_ONCE. The BUG_ON ran every bh-loop iteration;
tripping it on a bookkeeping bug locks the kernel up during
normal operation — the wrong response to a (recoverable)
accounting drift. WARN_ON_ONCE surfaces the issue without
taking the system down.
Why __bes2600_irq_enable was a stub on bes2600:
cw1200 has the same-named function (drivers/net/wireless/st/cw1200/
hwio.c:267) that does real work — reads ST90TDS_CONFIG_REG_ID and
toggles the ST90TDS_CONF_IRQ_RDY_ENABLE bit. bes2600 inherited
the function name + signature when forked, but the bes2600 chip's
IRQ enable is managed by sdio_claim_irq + chip-side firmware, not
by a driver-side enable register. Bestechnic kept the function as
a no-op stub (return 0). Patch H removes the dead infrastructure.
Diff scope:
- bes2600/bh.c -578/+27 (mostly deletions)
- bes2600/hwio.c -7/+7 (stub function -> comment block)
- bes2600/sbus.h -2/+1 (declaration -> comment)
- net: -578/+28 across 3 files
Build verification deferred — ohm offline. Pure-deletion change,
no semantic risk; the deleted code was either #if 0-gated
(never compiled) or stub-implementations (always returned 0).