[RFC PATCH RESEND 0/3] net: ath11k: Firmware lockup detection & mitigation

[Matthew Leach <matthew.leach@collabora.com>]

When sat idle for approx 24 hours, a user experienced a firmware lockup on a
ath11k chip, resulting in the following log output:

  systemd-timesyncd[558]: Timed out waiting for reply from 23.95.49.216:123 (2.arch.pool.ntp.org).
  systemd-timesyncd[558]: Timed out waiting for reply from 23.186.168.125:123 (2.arch.pool.ntp.org).
  systemd-timesyncd[558]: Timed out waiting for reply from 64.79.100.197:123 (2.arch.pool.ntp.org).
  systemd-timesyncd[558]: Timed out waiting for reply from 69.89.207.199:123 (2.arch.pool.ntp.org).
  kernel: ath11k_pci 0000:03:00.0: failed to transmit frame -12
  kernel: ath11k_pci 0000:03:00.0: failed to transmit frame -12
  kernel: ath11k_pci 0000:03:00.0: failed to transmit frame -12

  [...]

  kernel: ath11k_pci 0000:03:00.0: failed to flush transmit queue, data pkts pending 564
  kernel: ath11k_pci 0000:03:00.0: wmi command 20486 timeout
  kernel: ath11k_pci 0000:03:00.0: failed to submit WMI_VDEV_STOP cmd
  kernel: ath11k_pci 0000:03:00.0: failed to stop WMI vdev 0: -11
  kernel: ath11k_pci 0000:03:00.0: failed to stop vdev 0: -11
  kernel: ath11k_pci 0000:03:00.0: failed to do early vdev stop: -11
  kernel: ath11k_pci 0000:03:00.0: Failed to remove station: xx:xx:xx:xx:xx:xx for VDEV: 0
  kernel: ath11k_pci 0000:03:00.0: Found peer entry xx:xx:xx:xx:xx:xx n vdev 0 after it was supposedly removed
  kernel: ------------[ cut here ]------------
  kernel: WARNING: CPU: 0 PID: 1229 at net/mac80211/sta_info.c:1490 __sta_info_destroy_part2+0x14e/0x180 [mac80211]

This patch series:

 - Fixes a bug in the core reset logic which could cause a second redundant reset
   after the original reset completes.
 - Implements the error correlation logic and queues a chip reset when detected.
 - Adds a simulation to the simulate_fw_crash debugfs file to test the
   detection logic.

Signed-off-by: Matthew Leach <matthew.leach@collabora.com>
---
Matthew Leach (3):
      net: ath11k: fix redundant reset from stale pending workqueue bit
      net: ath11k: add firmware lockup detection and recovery
      net: ath11k: add lockup simulation via debugfs

 drivers/net/wireless/ath/ath11k/core.h    |  3 +++
 drivers/net/wireless/ath/ath11k/debugfs.c |  7 ++++++-
 drivers/net/wireless/ath/ath11k/hal.c     |  7 +++++--
 drivers/net/wireless/ath/ath11k/htc.c     |  2 +-
 drivers/net/wireless/ath/ath11k/mac.c     | 10 ++++++++++
 drivers/net/wireless/ath/ath11k/wmi.c     | 28 +++++++++++++++++++++++++++-
 6 files changed, 52 insertions(+), 5 deletions(-)
---
base-commit: 11439c4635edd669ae435eec308f4ab8a0804808
change-id: 20260304-ath11k-lockup-fixes-b808b5c7318b

Best regards,
-- 
Matt