Linux wireless drivers development
 help / color / mirror / Atom feed
* [PATCH ath-next v2 0/4] wifi: ath12k: harden stats/rate handling for WCN785x stability
@ 2026-02-12 12:17 m.limarencko
  2026-02-12 12:17 ` [PATCH ath-next v2 1/4] wifi: ath12k: return error when survey frequency is not found m.limarencko
                   ` (4 more replies)
  0 siblings, 5 replies; 7+ messages in thread
From: m.limarencko @ 2026-02-12 12:17 UTC (permalink / raw)
  To: jjohnson; +Cc: linux-wireless, ath12k, linux-kernel, Mikhail Limarenko

From: Mikhail Limarenko <m.limarencko@yandex.ru>

Hi Jeff, all,

On QCNFA765/WCN785x (PCI, kernel 6.18.5) we observed three recurring
issues:

- chan info events with frequency not present in local survey range,
  producing invalid idx warnings;
- frequent VDEV_STAT polling can block for 3 seconds on fw_stats_done
  timeouts and cause visible hitches;
- occasional invalid MCS metadata (for example HE MCS=12) propagates
  into mac80211 status handling and correlates with ieee80211_rx_list
  warnings.

This series addresses those cases by:
1. returning an explicit error from freq_to_idx() when no channel
   matches, and rejecting negative indexes in callers;
2. reducing the wait on VDEV_STAT fw_stats completion and skipping
   unnecessary waits for stats types that do not require it;
3. sanitizing invalid MCS metadata in both dp_rx and dp_mon paths by
   falling back to legacy metadata with ratelimited diagnostics.

Tested on:
- hardware: QCNFA765 (WCN785x)
- kernel: 6.18.5+deb13-amd64
- AP mode: 5 GHz (802.11ac)

Observed after applying this series:
- station dump polling no longer shows multi-second stalls in test runs;
- no fresh ieee80211_rx_list WARN was observed in the same windows.

v2:
- patch 1/4 commit message no longer claims OOB in chan-info paths
- patch 1/4 keeps matched-frequency index progression unchanged
- patch 1/4 returns -ENOENT on no-match and callers reject negative idx

Thanks,
Mikhail Limarenko

Mikhail Limarenko (4):
  wifi: ath12k: return error when survey frequency is not found
  wifi: ath12k: avoid long fw_stats waits on vdev stats hot path
  wifi: ath12k: sanitize invalid MCS metadata in rx path
  wifi: ath12k: sanitize invalid MCS metadata in monitor rx path

 drivers/net/wireless/ath/ath12k/dp_mon.c | 38 ++++++++++++++---------
 drivers/net/wireless/ath/ath12k/dp_rx.c  | 39 ++++++++++++++----------
 drivers/net/wireless/ath/ath12k/mac.c    | 22 +++++++++++--
 drivers/net/wireless/ath/ath12k/wmi.c    |  9 +++------
 4 files changed, 70 insertions(+), 38 deletions(-)

-- 
2.47.3

^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2026-02-26  1:50 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-02-12 12:17 [PATCH ath-next v2 0/4] wifi: ath12k: harden stats/rate handling for WCN785x stability m.limarencko
2026-02-12 12:17 ` [PATCH ath-next v2 1/4] wifi: ath12k: return error when survey frequency is not found m.limarencko
2026-02-12 12:17 ` [PATCH ath-next v2 2/4] wifi: ath12k: avoid long fw_stats waits on vdev stats hot path m.limarencko
2026-02-26  1:50   ` Baochen Qiang
2026-02-12 12:17 ` [PATCH ath-next v2 3/4] wifi: ath12k: sanitize invalid MCS metadata in rx path m.limarencko
2026-02-12 12:17 ` [PATCH ath-next v2 4/4] wifi: ath12k: sanitize invalid MCS metadata in monitor " m.limarencko
2026-02-25 22:24 ` [PATCH ath-next v2 0/4] wifi: ath12k: harden stats/rate handling for WCN785x stability Jeff Johnson

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox