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Date: Thu, 30 Nov 2023 11:25:32 +0100
From: Oliver Neukum <oneukum@...e.com>
To: Gregory Greenman <gregory.greenman@...el.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: debugfs problems in iwlwifi in latest kernels

Hi,

I am getting these reports with the latest kernels
(head at 3b47bc037bd44f142ac09848e8d3ecccc726be99)

[    8.744119] Intel(R) Wireless WiFi driver for Linux
[    8.746363] iwlwifi 0000:01:00.0: enabling device (0000 -> 0002)
[    8.758343] iwlwifi 0000:01:00.0: Detected crf-id 0x2816, cnv-id 0x1000200 wfpm id 0x80000000
[    8.759641] iwlwifi 0000:01:00.0: PCI dev 2526/0014, rev=0x321, rfid=0x105110

[    8.854357] iwlwifi 0000:01:00.0: WRT: Overriding region id 0
[    8.856851] iwlwifi 0000:01:00.0: WRT: Overriding region id 1
[    8.859258] iwlwifi 0000:01:00.0: WRT: Overriding region id 2
[    8.859265] iwlwifi 0000:01:00.0: WRT: Overriding region id 3
[    8.859269] iwlwifi 0000:01:00.0: WRT: Overriding region id 4
[    8.859273] iwlwifi 0000:01:00.0: WRT: Overriding region id 6
[    8.859276] iwlwifi 0000:01:00.0: WRT: Overriding region id 8
[    8.859279] iwlwifi 0000:01:00.0: WRT: Overriding region id 9
[    8.859282] iwlwifi 0000:01:00.0: WRT: Overriding region id 10
[    8.859285] iwlwifi 0000:01:00.0: WRT: Overriding region id 11
[    8.859288] iwlwifi 0000:01:00.0: WRT: Overriding region id 15
[    8.859292] iwlwifi 0000:01:00.0: WRT: Overriding region id 16
[    8.859295] iwlwifi 0000:01:00.0: WRT: Overriding region id 18
[    8.859298] iwlwifi 0000:01:00.0: WRT: Overriding region id 19
[    8.859301] iwlwifi 0000:01:00.0: WRT: Overriding region id 20
[    8.859304] iwlwifi 0000:01:00.0: WRT: Overriding region id 21
[    8.859308] iwlwifi 0000:01:00.0: WRT: Overriding region id 28
[    8.860155] iwlwifi 0000:01:00.0: loaded firmware version 46.ff18e32a.0 9260-th-b0-jf-b0-46.ucode op_mode iwlmvm

[    9.130468] iwlwifi 0000:01:00.0: Detected Intel(R) Wireless-AC 9260 160MHz, REV=0x321
[    9.131531] thermal thermal_zone0: failed to read out thermal zone (-61)
[    9.188374] iwlwifi 0000:01:00.0: base HW address: 38:68:93:82:ee:b6, OTP minor version: 0x4

[   12.122360] iwlwifi 0000:01:00.0: Registered PHC clock: iwlwifi-PTP, with index: 0
[   12.369551] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[   12.371131] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[   12.622862] r8152 3-1.1:1.0 eth3: carrier on
[   12.865883] NET: Registered PF_PACKET protocol family
[   23.422934] device-mapper: uevent: version 1.0.3
[   23.423136] device-mapper: ioctl: 4.48.0-ioctl (2023-03-01) initialised: dm-devel@...hat.com
[  424.025821] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[  424.025854] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[  719.828959] BTRFS info (device nvme0n1p2): qgroup scan paused
[  836.020932] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[  836.020965] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 1010.127770] NOHZ tick-stop error: local softirq work is pending, handler #08!!!
[ 1248.043519] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 1248.043551] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 1423.400973] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 1423.401003] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 1423.436864] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 1423.436880] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 1426.544779] warning: `kded5' uses wireless extensions which will stop working for Wi-Fi 7 hardware; use nl80211
[ 1426.690498] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 1426.690640] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0

[ 1446.809198] wlan0: 80 MHz not supported, disabling VHT
[ 1446.815785] wlan0: authenticate with cc:ce:1e:f4:37:95 (local address=38:68:93:82:ee:b6)
[ 1446.816863] wlan0: send auth to cc:ce:1e:f4:37:95 (try 1/3)
[ 1446.958933] wlan0: send auth to cc:ce:1e:f4:37:95 (try 2/3)
[ 1447.066528] wlan0: send auth to cc:ce:1e:f4:37:95 (try 3/3)
[ 1447.168961] wlan0: authentication with cc:ce:1e:f4:37:95 timed out
[ 1447.368481] wlan0: 80 MHz not supported, disabling VHT
[ 1447.373729] wlan0: authenticate with e0:28:6d:fd:37:95 (local address=38:68:93:82:ee:b6)
[ 1447.374741] wlan0: send auth to e0:28:6d:fd:37:95 (try 1/3)
[ 1447.416245] wlan0: authenticated
[ 1447.418936] wlan0: associate with e0:28:6d:fd:37:95 (try 1/3)
[ 1447.424934] wlan0: RX AssocResp from e0:28:6d:fd:37:95 (capab=0x1431 status=0 aid=2)
[ 1447.430187] wlan0: associated
[ 1447.482515] wlan0: Limiting TX power to 20 (20 - 0) dBm as advertised by e0:28:6d:fd:37:95
[ 1458.346586] wlan0: deauthenticating from e0:28:6d:fd:37:95 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 1459.320382] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 1459.320434] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 1870.031487] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 1870.031547] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0

[ 2283.028582] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 2283.028623] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 2697.046828] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 2697.046902] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 3109.031148] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 3109.031171] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 3521.035194] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 3521.035227] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 3934.038809] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 3934.038837] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 4346.040215] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 4346.040319] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 4760.046923] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 4760.046946] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0
[ 5173.051589] debugfs: Directory 'iwlmvm' with parent 'netdev:wlan0' already present!
[ 5173.051664] iwlwifi 0000:01:00.0: Failed to create debugfs directory under netdev:wlan0

The device is functional in spite of the warnings. Debugfs shows:

localhost:/home/oneukum # ll /sys/kernel/debug/iwlwifi/0000\:01\:00.0/iwlmvm/
insgesamt 0
-r-------- 1 root root 0 30. Nov 09:22 bt_cmd
--w------- 1 root root 0 30. Nov 09:22 bt_force_ant
-r-------- 1 root root 0 30. Nov 09:22 bt_notif
--w------- 1 root root 0 30. Nov 09:22 bt_tx_prio
-r-------- 1 root root 0 30. Nov 09:22 ctdp_budget
-r-------- 1 root root 0 30. Nov 09:22 d3_test
-rw------- 1 root root 0 30. Nov 09:22 d3_wake_sysassert
--w------- 1 root root 0 30. Nov 09:22 dbg_time_point
-rw------- 1 root root 0 30. Nov 09:22 disable_power_off
-rw------- 1 root root 0 30. Nov 09:22 drop_bcn_ap_mode
-r-------- 1 root root 0 30. Nov 09:22 drv_rx_stats
--w------- 1 root root 0 30. Nov 09:22 enabled_severities
-rw------- 1 root root 0 30. Nov 09:22 enable_scan_iteration_notif
--w------- 1 root root 0 30. Nov 09:22 force_ctkill
--w------- 1 root root 0 30. Nov 09:22 fw_dbg_collect
-rw------- 1 root root 0 30. Nov 09:22 fw_dbg_conf
-r-------- 1 root root 0 30. Nov 09:22 fw_dbg_domain
--w------- 1 root root 0 30. Nov 09:22 fw_info
--w------- 1 root root 0 30. Nov 09:22 fw_nmi
--w------- 1 root root 0 30. Nov 09:22 fw_restart
-r-------- 1 root root 0 30. Nov 09:22 fw_rx_stats
-r-------- 1 root root 0 30. Nov 09:22 fw_system_stats
-r-------- 1 root root 0 30. Nov 09:22 fw_ver
-rw------- 1 root root 0 30. Nov 09:22 he_sniffer_params
--w------- 1 root root 0 30. Nov 09:22 indirection_tbl
--w------- 1 root root 0 30. Nov 09:22 inject_beacon_ie
--w------- 1 root root 0 30. Nov 09:22 inject_beacon_ie_restore
--w------- 1 root root 0 30. Nov 09:22 inject_packet
-r-------- 1 root root 0 30. Nov 09:22 last_netdetect_scans
-rw------- 1 root root 0 30. Nov 09:22 mem
lrwxrwxrwx 1 root root 0 30. Nov 09:22 netdev:p2p-dev-wlan0 -> ../../../ieee80211/phy0/netdev:p2p-dev-wlan0/iwlmvm
lrwxrwxrwx 1 root root 0 30. Nov 11:22 netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm
-r-------- 1 root root 0 30. Nov 09:22 nic_temp
-r-------- 1 root root 0 30. Nov 09:22 nvm_calib
-r-------- 1 root root 0 30. Nov 09:22 nvm_hw
-r-------- 1 root root 0 30. Nov 09:22 nvm_phy_sku
-r-------- 1 root root 0 30. Nov 09:22 nvm_prod
-r-------- 1 root root 0 30. Nov 09:22 nvm_reg
-r-------- 1 root root 0 30. Nov 09:22 nvm_sw
-rw------- 1 root root 0 30. Nov 09:22 prph_reg
-r-------- 1 root root 0 30. Nov 09:22 ps_disabled
-rw------- 1 root root 0 30. Nov 09:22 rfi_freq_table
-r-------- 1 root root 0 30. Nov 09:22 sar_geo_profile
-rw------- 1 root root 0 30. Nov 09:22 scan_ant_rxchain
--w------- 1 root root 0 30. Nov 09:22 send_echo_cmd
--w------- 1 root root 0 30. Nov 09:22 send_hcmd
-rw------- 1 root root 0 30. Nov 09:22 set_nic_temperature
-rw------- 1 root root 0 30. Nov 09:22 sram
--w------- 1 root root 0 30. Nov 09:22 sta_drain
--w------- 1 root root 0 30. Nov 09:22 start_ctdp
-r-------- 1 root root 0 30. Nov 09:22 stations
--w------- 1 root root 0 30. Nov 09:22 stop_ctdp
-r-------- 1 root root 0 30. Nov 09:22 tas_get_status
--w------- 1 root root 0 30. Nov 09:22 timestamp_marker
--w------- 1 root root 0 30. Nov 09:22 tx_flush
-r-------- 1 root root 0 30. Nov 09:22 uapsd_noagg_bssids
-r-------- 1 root root 0 30. Nov 09:22 wifi_6e_enable

	Regards
		Oliver


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