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bes2600: Patch D — atomicize ba_lock counters, drop the spinlock (#7)

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This commit was merged in pull request #7.
This commit is contained in:
Markus Fritsche
2026-05-07 22:19:53 +00:00
parent 25c0ed8c57 44b296647b
commit 3dbabf3092
5 changed files with 85 additions and 56 deletions
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bes2600/bes2600.h
+17 -9
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@@ -353,15 +353,23 @@ struct bes2600_common {
* Keeping in common structure for the time being. Will be moved to VIFF
* after the mechanism is clear */
u8 ba_tid_mask;
int ba_acc; /*TODO: Same as above */
int ba_cnt; /*TODO: Same as above */
int ba_cnt_rx; /*TODO: Same as above */
int ba_acc_rx; /*TODO: Same as above */
int ba_hist; /*TODO: Same as above */
struct timer_list ba_timer;/*TODO: Same as above */
spinlock_t ba_lock; /*TODO: Same as above */
bool ba_ena; /*TODO: Same as above */
struct work_struct ba_work; /*TODO: Same as above */
/*
* Patch D: ba_lock removed. Per-frame TX/RX hot-path bumped these
* counters under spin_lock_bh; the lock did not protect any
* compound invariant that atomic ops can't satisfy. Counters are
* now atomic_t; ba_armed gates the once-per-window mod_timer
* arm via cmpxchg so concurrent TX/RX at a fresh window each
* try to claim the arm and exactly one succeeds.
*/
atomic_t ba_acc;
atomic_t ba_cnt;
atomic_t ba_cnt_rx;
atomic_t ba_acc_rx;
atomic_t ba_armed;
int ba_hist;
struct timer_list ba_timer;
atomic_t ba_ena;
struct work_struct ba_work;
bool is_BT_Present;
bool is_go_thru_go_neg;
u8 conf_listen_interval;