[PATCH 0/5] wifi: ath12k: fixes to improve MLO station stability

[Jose Ignacio Tornos Martinez <jtornosm@redhat.com>]

This series improves firmware crash recovery and connection stability
for MLO (Wi-Fi 7) stations on ath12k. Both work correctly for non-MLO
(Wi-Fi 6) stations, where the driver handles the full teardown and
reconnect cycle without issues and maintains stable connections. This
series brings MLO to the same level.

Without these fixes, a firmware crash during an active MLO connection
results in kernel warnings, NULL pointer dereferences, 20+ second
recovery delays, and periodic disconnections both after recovery and
during normal operation under heavy traffic.

Patches 1-3 fix firmware crash recovery:

Patch 1 moves the RECOVERY flag clear to reconfig_complete and adds
        CRASH_FLUSH guards to prevent operations on dead firmware.
Patch 2 prevents scans during recovery to avoid NULL dereferences.
Patch 3 fixes ML peer ID desync between host and firmware by syncing
        the peer ID from firmware's actual value.

Patches 4-5 fix MLO beacon miss handling:

Patch 4 fixes beacon_iter to iterate all MLO links instead of only
        deflink for BSSID matching and connection_loss_work
        cancellation.
Patch 5 complements patch 4 by skipping connection_loss_work for MLO
        entirely, since its cancellation mechanism is unreliable and
        the mac80211 probe triggered by ieee80211_beacon_loss() is
        sufficient to detect real AP unreachability, as done by other
        MLO-capable drivers such as mt76 and rtw89.

Tested on WCN7850 with MLO (Wi-Fi 7).
Firmware crashes were observed to occur spontaneously during normal
MLO operation with intense traffic testing, though rarely.
The debugfs simulate_fw_crash interface was used for systematic testing
and reproduction during active MLO connections with traffic.

Note: I will have limited availability from mid-August to
mid-September. I will address any review feedback before then
or promptly after returning.

Jose Ignacio Tornos Martinez (5):
  wifi: ath12k: fix MLO station firmware crash recovery
  wifi: ath12k: prevent scan during firmware recovery
  wifi: ath12k: fix MLO dp_peer ID desync with firmware
  wifi: ath12k: fix MLO beacon handling using per-link addressing
  wifi: ath12k: skip connection_loss_work for MLO beacon miss