chan info: invalid frequency 0 (idx 41 out of bounds)

Luca Weiss luca.weiss at fairphone.com
Fri Jun 9 04:41:16 PDT 2023 

Hi all,

I'm seeing a problem(?) since a while with the following warning being
printed to dmesg regularly when running on sm7225-fairphone-fp4 with
e.g. v6.4 kernel:

[   44.891535] ath10k_snoc 18800000.wifi: chan info: invalid frequency 0 (idx 41 out of bounds)

To be clear this is not a regression, from what I recall I've always
seen this warning happening since bringing up wifi on this board, also
with older kernel versions.

Enabling some debug log for chan info shows the following behavior:

[   44.048918] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2412 cmd_flags 0 noise_floor -96 rx_clear_count 1208242 cycle_count 5988267
[   44.100461] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2417 cmd_flags 0 noise_floor -96 rx_clear_count 425031 cycle_count 6010605
[   44.165736] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2422 cmd_flags 0 noise_floor -96 rx_clear_count 351782 cycle_count 6010443
[   44.215593] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2427 cmd_flags 0 noise_floor -96 rx_clear_count 898429 cycle_count 6010242
[   44.259399] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2432 cmd_flags 0 noise_floor -96 rx_clear_count 674101 cycle_count 6011164
[   44.313452] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2437 cmd_flags 0 noise_floor -96 rx_clear_count 1927966 cycle_count 6010919
[   44.366818] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2442 cmd_flags 0 noise_floor -96 rx_clear_count 752382 cycle_count 6011096
[   44.415512] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2447 cmd_flags 0 noise_floor -96 rx_clear_count 283823 cycle_count 6011699
[   44.468153] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2452 cmd_flags 0 noise_floor -96 rx_clear_count 113502 cycle_count 6010550
[   44.532340] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2457 cmd_flags 0 noise_floor -96 rx_clear_count 114628 cycle_count 6010540
[   44.574636] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2462 cmd_flags 0 noise_floor -96 rx_clear_count 2607035 cycle_count 6011370
[   44.733290] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2467 cmd_flags 0 noise_floor -96 rx_clear_count 217628 cycle_count 18010493
[   44.891491] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 2472 cmd_flags 0 noise_floor -96 rx_clear_count 138280 cycle_count 18013512
[   44.891523] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 0 cmd_flags 1 noise_floor 0 rx_clear_count 0 cycle_count 0
[   44.891535] ath10k_snoc 18800000.wifi: chan info: invalid frequency 0 (idx 41 out of bounds)
[   45.065699] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5180 cmd_flags 0 noise_floor -96 rx_clear_count 5623 cycle_count 18011896
[   45.207280] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5200 cmd_flags 0 noise_floor -96 rx_clear_count 0 cycle_count 18010178
[   45.356698] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5220 cmd_flags 0 noise_floor -96 rx_clear_count 145755 cycle_count 18010585
[   45.515675] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5240 cmd_flags 0 noise_floor -96 rx_clear_count 493478 cycle_count 18010598
[   45.665588] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5260 cmd_flags 0 noise_floor -96 rx_clear_count 0 cycle_count 18009959
[   45.815610] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5280 cmd_flags 0 noise_floor -96 rx_clear_count 1178 cycle_count 18010173
[   45.967808] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5300 cmd_flags 0 noise_floor -96 rx_clear_count 0 cycle_count 18022249
[   46.128716] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5320 cmd_flags 0 noise_floor -96 rx_clear_count 0 cycle_count 17987593
[   46.277628] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5500 cmd_flags 0 noise_floor -96 rx_clear_count 88490 cycle_count 18018964
[   46.432316] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5520 cmd_flags 0 noise_floor -96 rx_clear_count 66334 cycle_count 17993843
[   46.520274] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5540 cmd_flags 0 noise_floor -96 rx_clear_count 269069 cycle_count 9322999
[   46.663392] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5560 cmd_flags 0 noise_floor -96 rx_clear_count 188003 cycle_count 18019229
[   46.814223] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5580 cmd_flags 0 noise_floor -96 rx_clear_count 28928 cycle_count 17997429
[   46.966960] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5600 cmd_flags 0 noise_floor -96 rx_clear_count 1316 cycle_count 17995217
[   47.120005] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5620 cmd_flags 0 noise_floor -96 rx_clear_count 37293 cycle_count 18018966
[   47.272868] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5640 cmd_flags 0 noise_floor -96 rx_clear_count 47831 cycle_count 17993641
[   47.426280] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5660 cmd_flags 0 noise_floor -96 rx_clear_count 0 cycle_count 17996612
[   47.579031] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5680 cmd_flags 0 noise_floor -96 rx_clear_count 9674 cycle_count 18019336
[   47.732133] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5700 cmd_flags 0 noise_floor -96 rx_clear_count 0 cycle_count 17994440
[   47.885495] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5720 cmd_flags 0 noise_floor -96 rx_clear_count 0 cycle_count 17997310
[   48.038263] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5745 cmd_flags 0 noise_floor -96 rx_clear_count 5758 cycle_count 18020498
[   48.198999] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5765 cmd_flags 0 noise_floor -96 rx_clear_count 61887 cycle_count 17981691
[   48.349005] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5785 cmd_flags 0 noise_floor -96 rx_clear_count 49557 cycle_count 17994194
[   48.498973] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5805 cmd_flags 0 noise_floor -96 rx_clear_count 4139477 cycle_count 18019194
[   48.650487] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5825 cmd_flags 0 noise_floor -96 rx_clear_count 6413 cycle_count 17982464
[   48.803931] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 5845 cmd_flags 0 noise_floor -96 rx_clear_count 3882 cycle_count 18022337
[   48.803961] ath10k_snoc 18800000.wifi: chan info err_code 0 freq 0 cmd_flags 1 noise_floor 0 rx_clear_count 0 cycle_count 0
[   48.803969] ath10k_snoc 18800000.wifi: chan info: invalid frequency 0 (idx 41 out of bounds)

So from what I can tell this firmware sends freq 0 info, then
freq_to_idx loops through the freqs and we arrive at the max value
ATH10K_NUM_CHANS (41).

Has this behavior been seen before or is this (to your knowledge)
limited to this board?

[   41.016338] ath10k_snoc 18800000.wifi: wcn3990 hw1.0 target 0x00000008 chip_id 0x00000000 sub 0000:0000
[   41.016356] ath10k_snoc 18800000.wifi: kconfig debug 1 debugfs 0 tracing 0 dfs 0 testmode 0
[   41.016363] ath10k_snoc 18800000.wifi: firmware ver  api 5 features wowlan,mgmt-tx-by-reference,non-bmi crc32 b3d4b790
[   41.082577] ath10k_snoc 18800000.wifi: htt-ver 3.109 wmi-op 4 htt-op 3 cal file max-sta 32 raw 0 hwcrypto 1
[   42.276395] ath10k_snoc 18800000.wifi: invalid MAC address; choosing random
[   42.276445] ath: EEPROM regdomain: 0x406c
[   42.276446] ath: EEPROM indicates we should expect a direct regpair map
[   42.276449] ath: Country alpha2 being used: 00
[   42.276450] ath: Regpair used: 0x6c

Anyone got an idea?

Regards
Luca

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