[Help]: MT7921 kernel NULL pointer error

[M-y]

Checklist

• I acknowledge that support is provided on a best-effort basis.
• I acknowledge that the authors and contributors to this repository cannot be held responsible for the results of my use of any information contained in or linked from this repository.

uname

Linux bananapi 6.13.7-edge-sunxi #1 SMP Thu Mar 13 12:08:08 UTC 2025 armv7l GNU/Linux

lsusb

Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 002: ID 0e8d:7961 MediaTek Inc. Wireless_Device Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

rfkill

0: phy0: Wireless LAN Soft blocked: no Hard blocked: no

dkms

bash: dkms: command not found

iw

phy#0
        Interface wlxe84e06afb8f1
                ifindex 3
                wdev 0x1
                addr e8:4e:06:af:b8:f1
                ssid xxx
                type AP
                channel 6 (2437 MHz), width: 20 MHz, center1: 2437 MHz
                txpower 3.00 dBm
                multicast TXQ:
                        qsz-byt qsz-pkt flows   drops   marks   overlmt hashcol tx-bytes        tx-packets
                        9868    164     555     0       0       0       0       48548           572

What happened?

Hi,
I want to setup an access point using Banana Pi M1. Here are my specs:

• I have soldered official raspberry pi 5V 3A power supply to Banana pi for supplying enough power. Not using micro usb to power the device.
• Added a heatsink and running a fan using another power source.
• EDUP EP-AX1672 is my usb wireless device, inserted directly to the usb port.
• Updated the firmware files for MT7921.
• Armbian 25.2.3 bookworm is my distro.
• Using wifi6 conf for hostapd provided here.

ssid=xxx
wpa_passphrase=passwrd
sae_password=passwrd
hw_mode=g
channel=6
country_code=TR
ieee80211d=1
interface=wlxe84e06afb8f1
driver=nl80211
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
beacon_int=100
dtim_period=2
skip_inactivity_poll=1
auth_algs=3
max_num_sta=16
macaddr_acl=1
accept_mac_file=/etc/hostapd/macs.allow
ignore_broadcast_ssid=0
okc=1
wpa=2
wpa_pairwise=CCMP CCMP-256
rsn_pairwise=CCMP CCMP-256
wpa_key_mgmt=WPA-PSK WPA-PSK-SHA256
wmm_enabled=1
ieee80211n=1
ht_capab=[LDPC][GF][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC1][MAX-AMSDU-7935]
ieee80211ax=1
he_bss_color=37
he_mu_edca_qos_info_param_count=0
he_mu_edca_qos_info_q_ack=0
he_mu_edca_qos_info_queue_request=0
he_mu_edca_qos_info_txop_request=0
he_mu_edca_ac_be_aifsn=8
he_mu_edca_ac_be_aci=0
he_mu_edca_ac_be_ecwmin=9
he_mu_edca_ac_be_ecwmax=10
he_mu_edca_ac_be_timer=255
he_mu_edca_ac_bk_aifsn=15
he_mu_edca_ac_bk_aci=1
he_mu_edca_ac_bk_ecwmin=9
he_mu_edca_ac_bk_ecwmax=10
he_mu_edca_ac_bk_timer=255
he_mu_edca_ac_vi_ecwmin=5
he_mu_edca_ac_vi_ecwmax=7
he_mu_edca_ac_vi_aifsn=5
he_mu_edca_ac_vi_aci=2
he_mu_edca_ac_vi_timer=255
he_mu_edca_ac_vo_aifsn=5
he_mu_edca_ac_vo_aci=3
he_mu_edca_ac_vo_ecwmin=5
he_mu_edca_ac_vo_ecwmax=7
he_mu_edca_ac_vo_timer=255

• Not using bridged mode, forwarding traffic to ethernet interface (echo "1" > /proc/sys/net/ipv4/ip_forward)
• Making ip forward. (iptables -t nat -A POSTROUTING -s 10.10.1.0/24 -o end0 -j MASQUERADE)
• running dnsmasq for dhcp.

AP is running good but after a few minutes this error appears and hostapd goes unresponsive. Making some traffic using ookla speedtest also triggers the error shortly.

2025-04-04T14:09:14.729173+03:00 bananapi kernel: [  625.037493] usb 3-1: new high-speed USB device number 2 using ehci-platform
2025-04-04T14:09:14.937511+03:00 bananapi kernel: [  625.247819] usb 3-1: New USB device found, idVendor=0e8d, idProduct=7961, bcdDevice= 1.00
2025-04-04T14:09:14.937700+03:00 bananapi kernel: [  625.247858] usb 3-1: New USB device strings: Mfr=2, Product=3, SerialNumber=4
2025-04-04T14:09:14.937719+03:00 bananapi kernel: [  625.247875] usb 3-1: Product: Wireless_Device
2025-04-04T14:09:14.937734+03:00 bananapi kernel: [  625.247888] usb 3-1: Manufacturer: MediaTek Inc.
2025-04-04T14:09:14.937746+03:00 bananapi kernel: [  625.247902] usb 3-1: SerialNumber: 000000000
2025-04-04T14:09:15.449142+03:00 bananapi kernel: [  625.757743] usb 3-1: reset high-speed USB device number 2 using ehci-platform
2025-04-04T14:09:15.623939+03:00 bananapi kernel: [  625.931928] usbcore: registered new interface driver mt7921u
2025-04-04T14:09:15.647340+03:00 bananapi kernel: [  625.949801] mt7921u 3-1:1.0: HW/SW Version: 0x8a108a10, Build Time: 20241106151007a
2025-04-04T14:09:15.647553+03:00 bananapi kernel: [  625.949801] 
2025-04-04T14:09:16.009170+03:00 bananapi kernel: [  626.319926] mt7921u 3-1:1.0: WM Firmware Version: ____010000, Build Time: 20241106151045
....
2025-04-04T14:12:47.186328+03:00 bananapi kernel: [  836.751598] 8<--- cut here ---
2025-04-04T14:12:47.186435+03:00 bananapi kernel: [  836.751631] Unable to handle kernel NULL pointer dereference at virtual address 0000032c when read
2025-04-04T14:12:47.186463+03:00 bananapi kernel: [  836.751653] [0000032c] *pgd=00000000
2025-04-04T14:12:47.186474+03:00 bananapi kernel: [  836.751680] Internal error: Oops: 5 [#1] SMP THUMB2
2025-04-04T14:12:47.186485+03:00 bananapi kernel: [  836.763114] Modules linked in: aes_arm_bs crypto_simd aes_arm ccm nft_chain_nat xt_MASQUERADE nf_nat nft_compat mt7921u mt792x_usb mt7921_common mt792x_lib mt76_connac_lib mt76_usb mt76 mac80211 libarc4 lima gpu_sched sun4i_gpadc_iio sunxi_cir axp20x_adc sun4i_ts sunxi_cedrus(C) v4l2_mem2mem videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc drm_shmem_helper display_connector cfg80211 simplefb cpufreq_dt rfkill evdev uio_pdrv_genirq uio zram zsmalloc binfmt_misc dm_mod autofs4 ext4 mbcache jbd2 pinctrl_axp209 axp20x_usb_power industrialio sun4i_gpadc sunxi phy_generic realtek
2025-04-04T14:12:47.186498+03:00 bananapi kernel: [  836.838617] CPU: 1 UID: 0 PID: 12434 Comm: mt76-usb-rx phy Tainted: G         C         6.13.7-edge-sunxi #1
2025-04-04T14:12:47.186509+03:00 bananapi kernel: [  836.855861] Tainted: [C]=CRAP
2025-04-04T14:12:47.186517+03:00 bananapi kernel: [  836.866166] Hardware name: Allwinner sun7i (A20) Family
2025-04-04T14:12:47.186525+03:00 bananapi kernel: [  836.878773] PC is at mt792x_rx_get_wcid+0x2c/0x40 [mt792x_lib]
2025-04-04T14:12:47.186534+03:00 bananapi kernel: [  836.892112] LR is at mt7921_queue_rx_skb+0xff/0x624 [mt7921_common]
2025-04-04T14:12:47.186542+03:00 bananapi kernel: [  836.906150] pc : [<bfbad2ac>]    lr : [<bfbca8cb>]    psr: 20070033
2025-04-04T14:12:47.186550+03:00 bananapi kernel: [  836.920287] sp : f083dec0  ip : c5034ac4  fp : 00000000
2025-04-04T14:12:47.186559+03:00 bananapi kernel: [  836.933191] r10: 00000006  r9 : 60000c4f  r8 : 38010146
2025-04-04T14:12:47.186567+03:00 bananapi kernel: [  836.946165] r7 : 80843805  r6 : c3c09860  r5 : c535b000  r4 : c5034a80
2025-04-04T14:12:47.186575+03:00 bananapi kernel: [  836.960392] r3 : 00000000  r2 : 00000000  r1 : 00000883  r0 : c3d4594c
2025-04-04T14:12:47.186584+03:00 bananapi kernel: [  836.974641] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA Thumb  Segment none
2025-04-04T14:12:47.186593+03:00 bananapi kernel: [  836.989755] Control: 50c5387d  Table: 451c806a  DAC: 00000051
2025-04-04T14:12:47.186602+03:00 bananapi kernel: [  837.003213] Register r0 information: slab kmalloc-4k start c3d45000 pointer offset 2380 size 4096
2025-04-04T14:12:47.186611+03:00 bananapi kernel: [  837.020019] Register r1 information: non-paged memory
2025-04-04T14:12:47.186619+03:00 bananapi kernel: [  837.032866] Register r2 information: NULL pointer
2025-04-04T14:12:47.186628+03:00 bananapi kernel: [  837.045363] Register r3 information: NULL pointer
2025-04-04T14:12:47.186637+03:00 bananapi kernel: [  837.057767] Register r4 information: slab skbuff_head_cache start c5034a80 pointer offset 0 size 192
2025-04-04T14:12:47.186647+03:00 bananapi kernel: [  837.074386] Register r5 information: non-slab/vmalloc memory
2025-04-04T14:12:47.186656+03:00 bananapi kernel: [  837.087838] Register r6 information: non-slab/vmalloc memory
2025-04-04T14:12:47.186664+03:00 bananapi kernel: [  837.101195] Register r7 information: non-paged memory
2025-04-04T14:12:47.186672+03:00 bananapi kernel: [  837.113910] Register r8 information: non-paged memory
2025-04-04T14:12:47.186681+03:00 bananapi kernel: [  837.126425] Register r9 information: non-paged memory
2025-04-04T14:12:47.186689+03:00 bananapi kernel: [  837.138603] Register r10 information: non-paged memory
2025-04-04T14:12:47.186698+03:00 bananapi kernel: [  837.150767] Register r11 information: NULL pointer
2025-04-04T14:12:47.186706+03:00 bananapi kernel: [  837.162457] Register r12 information: slab skbuff_head_cache start c5034a80 pointer offset 68 size 192
2025-04-04T14:12:47.186716+03:00 bananapi kernel: [  837.178758] Process mt76-usb-rx phy (pid: 12434, stack limit = 0x3e49c8d4)
2025-04-04T14:12:47.186724+03:00 bananapi kernel: [  837.192586] Stack: (0xf083dec0 to 0xf083e000)
2025-04-04T14:12:47.186733+03:00 bananapi kernel: [  837.203843] dec0: 0000f052 c02d9d7f f6755ca4 00000000 00000000 fbc669c0 c0000000 00000000
2025-04-04T14:12:47.186741+03:00 bananapi kernel: [  837.218981] dee0: c5034a98 00000000 c5034a80 00000003 00001000 fbc669c0 00001000 c9b60680
2025-04-04T14:12:47.186750+03:00 bananapi kernel: [  837.234091] df00: bfbca7cd 00000001 c5034a80 00001000 c535b000 c3c09860 c3c0b01c bfb8845f
2025-04-04T14:12:47.186759+03:00 bananapi kernel: [  837.249201] df20: c3c0b068 00000000 c3c0b020 00000146 00000000 c3c0b01c c3c0986c c25d1400
2025-04-04T14:12:47.186768+03:00 bananapi kernel: [  837.264279] df40: c3c0b52c c25d1400 c3c0b01c c160cb78 f083df68 00000000 c3c0cbe8 c25d1400
2025-04-04T14:12:47.186776+03:00 bananapi kernel: [  837.279336] df60: c3c0cbe0 00000001 f6755ca4 00000000 00000000 bfac74f7 c9ab2240 c25d1400
2025-04-04T14:12:47.186785+03:00 bananapi kernel: [  837.294393] df80: bfac74a9 c3c0cbe0 c9a77f80 c014a377 00000ffa c9ab2240 c014a2b9 00000000
2025-04-04T14:12:47.186793+03:00 bananapi kernel: [  837.309458] dfa0: 00000000 00000000 00000000 c0100155 00000000 00000000 00000000 00000000
2025-04-04T14:12:47.186802+03:00 bananapi kernel: [  837.324518] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
2025-04-04T14:12:47.186810+03:00 bananapi kernel: [  837.339543] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
2025-04-04T14:12:47.186819+03:00 bananapi kernel: [  837.354491] Call trace: 
2025-04-04T14:12:47.186828+03:00 bananapi kernel: [  837.354534]  mt792x_rx_get_wcid [mt792x_lib] from mt7921_queue_rx_skb+0xff/0x624 [mt7921_common]
2025-04-04T14:12:47.186836+03:00 bananapi kernel: [  837.379495]  mt7921_queue_rx_skb [mt7921_common] from mt76u_rx_worker+0x3a3/0x3ac [mt76_usb]
2025-04-04T14:12:47.186845+03:00 bananapi kernel: [  837.395221]  mt76u_rx_worker [mt76_usb] from __mt76_worker_fn+0x4f/0x74 [mt76]
2025-04-04T14:12:47.186853+03:00 bananapi kernel: [  837.409914]  __mt76_worker_fn [mt76] from kthread+0xbf/0xd4
2025-04-04T14:12:47.186861+03:00 bananapi kernel: [  837.422865]  kthread from ret_from_fork+0x11/0x1c
2025-04-04T14:12:47.186870+03:00 bananapi kernel: [  837.434933] Exception stack(0xf083dfb0 to 0xf083dff8)
2025-04-04T14:12:47.186878+03:00 bananapi kernel: [  837.447075] dfa0:                                     00000000 00000000 00000000 00000000
2025-04-04T14:12:47.186887+03:00 bananapi kernel: [  837.462397] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
2025-04-04T14:12:47.186896+03:00 bananapi kernel: [  837.477782] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
2025-04-04T14:12:47.186904+03:00 bananapi kernel: [  837.491410] Code: 0301 d006 f8d0 32e8 (f8d3) 032c 
2025-04-04T14:12:47.186913+03:00 bananapi kernel: [  837.503526] ---[ end trace 0000000000000000 ]---

I can provide any information or make any other tests. Also I can change the distro if you have any advice.

[morrownr]

Hi @M-y

This bug was identified back in Feb. Here is a link to the patch that went in:

https://patchwork.kernel.org/project/linux-wireless/patch/20250218033343.1999648-1-mingyen.hsieh@mediatek.com/

The patch should work its way back into currently supported kernels but I do have good visibility on what the status is with the various distros. If you compile your own kernels, you could just apply the patch and press on. Along with a user, I reported this bug to Mediatek and they had it fixed within a couple of days. It came up with kernel 6.13 so if you can use a distro with kernel 6.6 or 6.12, you may not see this problem.

[M-y]

In 6.6 and 6.12, I was experiencing pending tx errors. Because of that I decided to use 6.13. I have looked the 6.13 tags in kernel repository the patch you pointed out isn't added. So I have patched manually and compiled the kernel. Thank you very much, this patch solves the null pointer error.
I have tested using 1 station makes iperf about 1 hour. AP is working solid.
I have put the test a bit further. Started ookla speedtes from 4 stations simultaneously. This time AP goes down and these errors appers:

2025-04-05T13:46:52.330628+03:00 bananapi kernel: [  546.434583] mt7921u 2-1:1.0: vendor request req:63 off:8454 failed:-110
2025-04-05T13:46:55.882751+03:00 bananapi kernel: [  549.983909] mt7921u 2-1:1.0: vendor request req:63 off:8458 failed:-110
2025-04-05T13:46:59.402586+03:00 bananapi kernel: [  553.507220] mt7921u 2-1:1.0: vendor request req:63 off:845c failed:-110
2025-04-05T13:47:02.922677+03:00 bananapi kernel: [  557.024614] mt7921u 2-1:1.0: vendor request req:63 off:8460 failed:-110
2025-04-05T13:47:06.442637+03:00 bananapi kernel: [  560.547931] mt7921u 2-1:1.0: vendor request req:63 off:8464 failed:-110
2025-04-05T13:47:09.962683+03:00 bananapi kernel: [  564.065224] mt7921u 2-1:1.0: vendor request req:63 off:8468 failed:-110
2025-04-05T13:47:13.482590+03:00 bananapi kernel: [  567.588558] mt7921u 2-1:1.0: vendor request req:63 off:846c failed:-110
2025-04-05T13:47:17.002612+03:00 bananapi kernel: [  571.105777] mt7921u 2-1:1.0: vendor request req:63 off:841c failed:-110
2025-04-05T13:47:20.522631+03:00 bananapi kernel: [  574.629202] mt7921u 2-1:1.0: vendor request req:63 off:8478 failed:-110
2025-04-05T13:47:24.042645+03:00 bananapi kernel: [  578.149510] mt7921u 2-1:1.0: vendor request req:63 off:d02c failed:-110
2025-04-05T13:47:27.562616+03:00 bananapi kernel: [  581.666699] mt7921u 2-1:1.0: vendor request req:63 off:d054 failed:-110
2025-04-05T13:47:31.086703+03:00 bananapi kernel: [  585.187209] mt7921u 2-1:1.0: vendor request req:63 off:d058 failed:-110
2025-04-05T13:47:34.602604+03:00 bananapi kernel: [  588.709309] mt7921u 2-1:1.0: vendor request req:63 off:53b8 failed:-110
2025-04-05T13:47:38.122594+03:00 bananapi kernel: [  592.230702] mt7921u 2-1:1.0: vendor request req:63 off:53c4 failed:-110
2025-04-05T13:47:41.642612+03:00 bananapi kernel: [  595.751511] mt7921u 2-1:1.0: vendor request req:66 off:53c4 failed:-110
2025-04-05T13:47:45.170866+03:00 bananapi kernel: [  599.276312] mt7921u 2-1:1.0: vendor request req:63 off:d698 failed:-110
2025-04-05T13:47:48.682610+03:00 bananapi kernel: [  602.791549] mt7921u 2-1:1.0: vendor request req:63 off:d520 failed:-110
2025-04-05T13:47:52.202630+03:00 bananapi kernel: [  606.308725] mt7921u 2-1:1.0: vendor request req:63 off:d518 failed:-110
2025-04-05T13:47:55.754604+03:00 bananapi kernel: [  609.864126] mt7921u 2-1:1.0: vendor request req:63 off:d688 failed:-110
2025-04-05T13:47:59.274751+03:00 bananapi kernel: [  613.381691] mt7921u 2-1:1.0: vendor request req:63 off:d690 failed:-110
2025-04-05T13:48:02.794586+03:00 bananapi kernel: [  616.904608] mt7921u 2-1:1.0: vendor request req:63 off:d558 failed:-110
2025-04-05T13:48:06.314574+03:00 bananapi kernel: [  620.424882] mt7921u 2-1:1.0: vendor request req:63 off:d564 failed:-110
2025-04-05T13:48:09.838623+03:00 bananapi kernel: [  623.945408] mt7921u 2-1:1.0: vendor request req:63 off:d568 failed:-110
2025-04-05T13:48:13.358880+03:00 bananapi kernel: [  627.466476] mt7921u 2-1:1.0: vendor request req:63 off:d7a8 failed:-110
2025-04-05T13:48:16.874618+03:00 bananapi kernel: [  630.982669] mt7921u 2-1:1.0: vendor request req:63 off:a150 failed:-110
2025-04-05T13:48:20.394647+03:00 bananapi kernel: [  634.505926] mt7921u 2-1:1.0: vendor request req:63 off:a158 failed:-110
2025-04-05T13:48:23.914585+03:00 bananapi kernel: [  638.023061] mt7921u 2-1:1.0: vendor request req:63 off:d780 failed:-110
2025-04-05T13:48:27.434608+03:00 bananapi kernel: [  641.546485] mt7921u 2-1:1.0: vendor request req:63 off:d770 failed:-110
2025-04-05T13:48:30.954593+03:00 bananapi kernel: [  645.063561] mt7921u 2-1:1.0: vendor request req:63 off:d774 failed:-110
2025-04-05T13:48:34.570735+03:00 bananapi kernel: [  648.683148] mt7921u 2-1:1.0: vendor request req:63 off:d55c failed:-110
2025-04-05T13:48:38.090605+03:00 bananapi kernel: [  652.203123] mt7921u 2-1:1.0: vendor request req:63 off:10e0 failed:-110
2025-04-05T13:48:41.614757+03:00 bananapi kernel: [  655.724389] mt7921u 2-1:1.0: vendor request req:63 off:10e4 failed:-110
2025-04-05T13:48:45.130605+03:00 bananapi kernel: [  659.243592] mt7921u 2-1:1.0: vendor request req:63 off:10e8 failed:-110
2025-04-05T13:48:48.746742+03:00 bananapi kernel: [  662.856896] mt7921u 2-1:1.0: vendor request req:63 off:10ec failed:-110
2025-04-05T13:48:52.266730+03:00 bananapi kernel: [  666.377080] mt7921u 2-1:1.0: vendor request req:63 off:10f0 failed:-110
2025-04-05T13:48:55.786766+03:00 bananapi kernel: [  669.897396] mt7921u 2-1:1.0: vendor request req:63 off:10f4 failed:-110
2025-04-05T13:48:59.310752+03:00 bananapi kernel: [  673.421510] mt7921u 2-1:1.0: vendor request req:63 off:10f8 failed:-110
2025-04-05T13:49:02.826742+03:00 bananapi kernel: [  676.937811] mt7921u 2-1:1.0: vendor request req:63 off:10fc failed:-110
2025-04-05T13:49:06.426625+03:00 bananapi kernel: [  680.529938] mt7921u 2-1:1.0: vendor request req:63 off:d7dc failed:-110
2025-04-05T13:49:09.962647+03:00 bananapi kernel: [  684.074166] mt7921u 2-1:1.0: vendor request req:63 off:d7ec failed:-110
2025-04-05T13:49:13.482695+03:00 bananapi kernel: [  687.594528] mt7921u 2-1:1.0: vendor request req:63 off:d7e0 failed:-110
2025-04-05T13:49:17.002599+03:00 bananapi kernel: [  691.117593] mt7921u 2-1:1.0: vendor request req:63 off:d7f0 failed:-110
2025-04-05T13:49:20.554635+03:00 bananapi kernel: [  694.666688] mt7921u 2-1:1.0: vendor request req:63 off:d7e4 failed:-110
2025-04-05T13:49:24.074582+03:00 bananapi kernel: [  698.190008] mt7921u 2-1:1.0: vendor request req:63 off:d7f4 failed:-110
2025-04-05T13:49:27.630614+03:00 bananapi kernel: [  701.743088] mt7921u 2-1:1.0: vendor request req:63 off:d7e8 failed:-110
2025-04-05T13:49:31.146632+03:00 bananapi kernel: [  705.259301] mt7921u 2-1:1.0: vendor request req:63 off:d7f8 failed:-110
2025-04-05T13:49:34.922780+03:00 bananapi kernel: [  709.035710] mt7921u 2-1:1.0: vendor request req:63 off:d02c failed:-110
2025-04-05T13:49:38.446736+03:00 bananapi kernel: [  712.559923] mt7921u 2-1:1.0: vendor request req:63 off:d054 failed:-110
2025-04-05T13:49:41.962675+03:00 bananapi kernel: [  716.076168] mt7921u 2-1:1.0: vendor request req:63 off:d058 failed:-110
2025-04-05T13:49:45.482734+03:00 bananapi kernel: [  719.596320] mt7921u 2-1:1.0: vendor request req:63 off:53b8 failed:-110
2025-04-05T13:49:49.002582+03:00 bananapi kernel: [  723.119508] mt7921u 2-1:1.0: vendor request req:63 off:53c4 failed:-110
2025-04-05T13:49:52.650723+03:00 bananapi kernel: [  726.764628] mt7921u 2-1:1.0: vendor request req:66 off:53c4 failed:-110
2025-04-05T13:49:57.226645+03:00 bananapi kernel: [  731.341012] mt7921u 2-1:1.0: vendor request req:63 off:d02c failed:-110
2025-04-05T13:50:00.746624+03:00 bananapi kernel: [  734.861332] mt7921u 2-1:1.0: vendor request req:63 off:d054 failed:-110
2025-04-05T13:50:04.266871+03:00 bananapi kernel: [  738.381322] mt7921u 2-1:1.0: vendor request req:63 off:d058 failed:-110
2025-04-05T13:50:07.818596+03:00 bananapi kernel: [  741.933370] mt7921u 2-1:1.0: vendor request req:63 off:53b8 failed:-110
2025-04-05T13:50:11.338606+03:00 bananapi kernel: [  745.456629] mt7921u 2-1:1.0: vendor request req:63 off:53c4 failed:-110
2025-04-05T13:50:14.858605+03:00 bananapi kernel: [  748.973738] mt7921u 2-1:1.0: vendor request req:66 off:53c4 failed:-110
2025-04-05T13:50:18.378761+03:00 bananapi kernel: [  752.496135] mt7921u 2-1:1.0: vendor request req:63 off:d698 failed:-110
2025-04-05T13:50:21.898597+03:00 bananapi kernel: [  756.017224] mt7921u 2-1:1.0: vendor request req:63 off:d520 failed:-110
2025-04-05T13:50:25.514611+03:00 bananapi kernel: [  759.633419] mt7921u 2-1:1.0: vendor request req:63 off:d518 failed:-110
2025-04-05T13:50:29.034793+03:00 bananapi kernel: [  763.151060] mt7921u 2-1:1.0: vendor request req:63 off:d688 failed:-110
2025-04-05T13:50:32.554603+03:00 bananapi kernel: [  766.673783] mt7921u 2-1:1.0: vendor request req:63 off:d690 failed:-110
2025-04-05T13:50:36.078769+03:00 bananapi kernel: [  770.194987] mt7921u 2-1:1.0: vendor request req:63 off:d558 failed:-110
2025-04-05T13:50:39.690813+03:00 bananapi kernel: [  773.807211] mt7921u 2-1:1.0: vendor request req:63 off:d564 failed:-110
2025-04-05T13:50:43.210849+03:00 bananapi kernel: [  777.327424] mt7921u 2-1:1.0: vendor request req:63 off:d568 failed:-110
2025-04-05T13:50:46.734804+03:00 bananapi kernel: [  780.851514] mt7921u 2-1:1.0: vendor request req:63 off:d7a8 failed:-110
2025-04-05T13:50:50.250749+03:00 bananapi kernel: [  784.367663] mt7921u 2-1:1.0: vendor request req:63 off:a150 failed:-110
2025-04-05T13:50:53.802722+03:00 bananapi kernel: [  787.923101] mt7921u 2-1:1.0: vendor request req:63 off:a158 failed:-110
2025-04-05T13:50:57.322704+03:00 bananapi kernel: [  791.440106] mt7921u 2-1:1.0: vendor request req:63 off:d780 failed:-110
2025-04-05T13:51:00.874807+03:00 bananapi kernel: [  794.992434] mt7921u 2-1:1.0: vendor request req:63 off:d770 failed:-110
2025-04-05T13:51:04.394704+03:00 bananapi kernel: [  798.512487] mt7921u 2-1:1.0: vendor request req:63 off:d774 failed:-110
2025-04-05T13:51:07.914765+03:00 bananapi kernel: [  802.032581] mt7921u 2-1:1.0: vendor request req:63 off:d55c failed:-110
2025-04-05T13:51:11.434624+03:00 bananapi kernel: [  805.552899] mt7921u 2-1:1.0: vendor request req:63 off:10e0 failed:-110
2025-04-05T13:51:14.954722+03:00 bananapi kernel: [  809.073009] mt7921u 2-1:1.0: vendor request req:63 off:10e4 failed:-110
2025-04-05T13:51:18.510732+03:00 bananapi kernel: [  812.629109] mt7921u 2-1:1.0: vendor request req:63 off:10e8 failed:-110
2025-04-05T13:51:22.026719+03:00 bananapi kernel: [  816.145246] mt7921u 2-1:1.0: vendor request req:63 off:10ec failed:-110
2025-04-05T13:51:25.578576+03:00 bananapi kernel: [  819.697276] mt7921u 2-1:1.0: vendor request req:63 off:10f0 failed:-110
2025-04-05T13:51:29.098577+03:00 bananapi kernel: [  823.217450] mt7921u 2-1:1.0: vendor request req:63 off:10f4 failed:-110
2025-04-05T13:51:32.618585+03:00 bananapi kernel: [  826.740764] mt7921u 2-1:1.0: vendor request req:63 off:10f8 failed:-110
2025-04-05T13:51:36.138745+03:00 bananapi kernel: [  830.258028] mt7921u 2-1:1.0: vendor request req:63 off:10fc failed:-110
2025-04-05T13:51:39.658608+03:00 bananapi kernel: [  833.777944] mt7921u 2-1:1.0: vendor request req:63 off:d7dc failed:-110
2025-04-05T13:51:43.178618+03:00 bananapi kernel: [  837.301204] mt7921u 2-1:1.0: vendor request req:63 off:d7ec failed:-110
2025-04-05T13:51:46.698583+03:00 bananapi kernel: [  840.821422] mt7921u 2-1:1.0: vendor request req:63 off:d7e0 failed:-110
2025-04-05T13:51:50.218816+03:00 bananapi kernel: [  844.338706] mt7921u 2-1:1.0: vendor request req:63 off:d7f0 failed:-110
2025-04-05T13:51:53.738602+03:00 bananapi kernel: [  847.861742] mt7921u 2-1:1.0: vendor request req:63 off:d7e4 failed:-110
2025-04-05T13:51:57.290608+03:00 bananapi kernel: [  851.410755] mt7921u 2-1:1.0: vendor request req:63 off:d7f4 failed:-110
2025-04-05T13:52:00.810616+03:00 bananapi kernel: [  854.931101] mt7921u 2-1:1.0: vendor request req:63 off:d7e8 failed:-110
2025-04-05T13:52:04.362665+03:00 bananapi kernel: [  858.483161] mt7921u 2-1:1.0: vendor request req:63 off:d7f8 failed:-110
2025-04-05T13:52:08.938599+03:00 bananapi kernel: [  863.062393] mt7921u 2-1:1.0: vendor request req:63 off:d02c failed:-110
2025-04-05T13:52:12.462724+03:00 bananapi kernel: [  866.583671] mt7921u 2-1:1.0: vendor request req:63 off:d054 failed:-110
2025-04-05T13:52:15.978605+03:00 bananapi kernel: [  870.102786] mt7921u 2-1:1.0: vendor request req:63 off:d058 failed:-110
2025-04-05T13:52:19.502726+03:00 bananapi kernel: [  873.623947] mt7921u 2-1:1.0: vendor request req:63 off:53b8 failed:-110
2025-04-05T13:52:23.018591+03:00 bananapi kernel: [  877.139956] mt7921u 2-1:1.0: vendor request req:63 off:53c4 failed:-110
2025-04-05T13:52:26.542760+03:00 bananapi kernel: [  880.664618] mt7921u 2-1:1.0: vendor request req:66 off:53c4 failed:-110
2025-04-05T13:52:31.118830+03:00 bananapi kernel: [  885.240469] mt7921u 2-1:1.0: vendor request req:63 off:d02c failed:-110
2025-04-05T13:52:34.666664+03:00 bananapi kernel: [  888.788604] mt7921u 2-1:1.0: vendor request req:63 off:d054 failed:-110
2025-04-05T13:52:38.186765+03:00 bananapi kernel: [  892.308861] mt7921u 2-1:1.0: vendor request req:63 off:d058 failed:-110
2025-04-05T13:52:41.738748+03:00 bananapi kernel: [  895.860929] mt7921u 2-1:1.0: vendor request req:63 off:53b8 failed:-110
2025-04-05T13:52:45.258684+03:00 bananapi kernel: [  899.381036] mt7921u 2-1:1.0: vendor request req:63 off:53c4 failed:-110
2025-04-05T13:52:48.778706+03:00 bananapi kernel: [  902.901248] mt7921u 2-1:1.0: vendor request req:66 off:53c4 failed:-110
2025-04-05T13:52:52.298696+03:00 bananapi kernel: [  906.421479] mt7921u 2-1:1.0: vendor request req:63 off:d698 failed:-110
2025-04-05T13:52:55.886646+03:00 bananapi kernel: [  910.009446] mt7921u 2-1:1.0: vendor request req:63 off:d520 failed:-110
2025-04-05T13:52:59.402807+03:00 bananapi kernel: [  913.525802] mt7921u 2-1:1.0: vendor request req:63 off:d518 failed:-110
2025-04-05T13:53:02.954605+03:00 bananapi kernel: [  917.077740] mt7921u 2-1:1.0: vendor request req:63 off:d688 failed:-110
2025-04-05T13:53:06.474861+03:00 bananapi kernel: [  920.598080] mt7921u 2-1:1.0: vendor request req:63 off:d690 failed:-110
2025-04-05T13:53:09.994578+03:00 bananapi kernel: [  924.121174] mt7921u 2-1:1.0: vendor request req:63 off:d558 failed:-110
2025-04-05T13:53:13.514622+03:00 bananapi kernel: [  927.638206] mt7921u 2-1:1.0: vendor request req:63 off:d564 failed:-110
2025-04-05T13:53:17.098634+03:00 bananapi kernel: [  931.225461] mt7921u 2-1:1.0: vendor request req:63 off:d568 failed:-110
2025-04-05T13:53:20.618574+03:00 bananapi kernel: [  934.742478] mt7921u 2-1:1.0: vendor request req:63 off:d7a8 failed:-110
2025-04-05T13:53:24.138582+03:00 bananapi kernel: [  938.265768] mt7921u 2-1:1.0: vendor request req:63 off:a150 failed:-110
2025-04-05T13:53:27.658596+03:00 bananapi kernel: [  941.785974] mt7921u 2-1:1.0: vendor request req:63 off:a158 failed:-110
2025-04-05T13:53:31.178574+03:00 bananapi kernel: [  945.302965] mt7921u 2-1:1.0: vendor request req:63 off:d780 failed:-110
2025-04-05T13:53:34.698622+03:00 bananapi kernel: [  948.826228] mt7921u 2-1:1.0: vendor request req:63 off:d770 failed:-110
2025-04-05T13:53:38.218582+03:00 bananapi kernel: [  952.346386] mt7921u 2-1:1.0: vendor request req:63 off:d774 failed:-110
2025-04-05T13:53:41.770636+03:00 bananapi kernel: [  955.895421] mt7921u 2-1:1.0: vendor request req:63 off:d55c failed:-110
2025-04-05T13:53:45.290575+03:00 bananapi kernel: [  959.418682] mt7921u 2-1:1.0: vendor request req:63 off:10e0 failed:-110
2025-04-05T13:53:48.810587+03:00 bananapi kernel: [  962.938864] mt7921u 2-1:1.0: vendor request req:63 off:10e4 failed:-110
2025-04-05T13:53:52.330618+03:00 bananapi kernel: [  966.459235] mt7921u 2-1:1.0: vendor request req:63 off:10e8 failed:-110
2025-04-05T13:53:55.850592+03:00 bananapi kernel: [  969.979163] mt7921u 2-1:1.0: vendor request req:63 off:10ec failed:-110
2025-04-05T13:53:59.402608+03:00 bananapi kernel: [  973.531252] mt7921u 2-1:1.0: vendor request req:63 off:10f0 failed:-110
2025-04-05T13:54:02.922584+03:00 bananapi kernel: [  977.048382] mt7921u 2-1:1.0: vendor request req:63 off:10f4 failed:-110
2025-04-05T13:54:06.442652+03:00 bananapi kernel: [  980.568481] mt7921u 2-1:1.0: vendor request req:63 off:10f8 failed:-110
2025-04-05T13:54:09.966709+03:00 bananapi kernel: [  984.092765] mt7921u 2-1:1.0: vendor request req:63 off:10fc failed:-110
2025-04-05T13:54:13.482568+03:00 bananapi kernel: [  987.611887] mt7921u 2-1:1.0: vendor request req:63 off:d7dc failed:-110
2025-04-05T13:54:17.002594+03:00 bananapi kernel: [  991.132084] mt7921u 2-1:1.0: vendor request req:63 off:d7ec failed:-110
2025-04-05T13:54:20.590837+03:00 bananapi kernel: [  994.717254] mt7921u 2-1:1.0: vendor request req:63 off:d7e0 failed:-110
2025-04-05T13:54:24.110783+03:00 bananapi kernel: [  998.237406] mt7921u 2-1:1.0: vendor request req:63 off:d7f0 failed:-110
2025-04-05T13:54:27.630795+03:00 bananapi kernel: [ 1001.757548] mt7921u 2-1:1.0: vendor request req:63 off:d7e4 failed:-110
2025-04-05T13:54:31.146630+03:00 bananapi kernel: [ 1005.273569] mt7921u 2-1:1.0: vendor request req:63 off:d7f4 failed:-110
2025-04-05T13:54:34.670846+03:00 bananapi kernel: [ 1008.797975] mt7921u 2-1:1.0: vendor request req:63 off:d7e8 failed:-110
2025-04-05T13:54:38.218779+03:00 bananapi kernel: [ 1012.346028] mt7921u 2-1:1.0: vendor request req:63 off:d7f8 failed:-110
2025-04-05T13:54:43.850723+03:00 bananapi kernel: [ 1017.978208] mt7921u 2-1:1.0: vendor request req:63 off:d02c failed:-110
2025-04-05T13:54:47.370606+03:00 bananapi kernel: [ 1021.501362] mt7921u 2-1:1.0: vendor request req:63 off:d054 failed:-110
2025-04-05T13:54:50.954655+03:00 bananapi kernel: [ 1025.085515] mt7921u 2-1:1.0: vendor request req:63 off:d058 failed:-110
2025-04-05T13:54:54.474601+03:00 bananapi kernel: [ 1028.604601] mt7921u 2-1:1.0: vendor request req:63 off:53b8 failed:-110
2025-04-05T13:54:57.994626+03:00 bananapi kernel: [ 1032.125816] mt7921u 2-1:1.0: vendor request req:63 off:53c4 failed:-110
2025-04-05T13:55:01.514580+03:00 bananapi kernel: [ 1035.645941] mt7921u 2-1:1.0: vendor request req:66 off:53c4 failed:-110
2025-04-05T13:55:06.090574+03:00 bananapi kernel: [ 1040.219070] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:09.642582+03:00 bananapi kernel: [ 1043.774561] mt7921u 2-1:1.0: vendor request req:66 off:4230 failed:-110
2025-04-05T13:55:13.162583+03:00 bananapi kernel: [ 1047.294937] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:16.682587+03:00 bananapi kernel: [ 1050.815297] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:20.202580+03:00 bananapi kernel: [ 1054.335592] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:23.722602+03:00 bananapi kernel: [ 1057.852858] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:27.242743+03:00 bananapi kernel: [ 1061.373536] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:30.794600+03:00 bananapi kernel: [ 1064.928697] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:34.318656+03:00 bananapi kernel: [ 1068.450784] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:37.834572+03:00 bananapi kernel: [ 1071.969398] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:41.358698+03:00 bananapi kernel: [ 1075.490994] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:44.874576+03:00 bananapi kernel: [ 1079.010076] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110
2025-04-05T13:55:48.408402+03:00 bananapi kernel: [ 1082.531380] mt7921u 2-1:1.0: vendor request req:63 off:4230 failed:-110

Looks like off:4230 will continue forever.

[M-y]

This is another test result using kernel 6.13.7 with this patch.

2025-04-06T15:45:10.273898+03:00 bananapi kernel: [ 2946.005307] mt7921u 2-1.3:1.0: vendor request req:63 off:815c failed:-110
2025-04-06T15:45:13.793891+03:00 bananapi kernel: [ 2949.528661] mt7921u 2-1.3:1.0: vendor request req:63 off:8160 failed:-110
2025-04-06T15:45:17.313890+03:00 bananapi kernel: [ 2953.048905] mt7921u 2-1.3:1.0: vendor request req:63 off:8164 failed:-110
2025-04-06T15:45:20.834006+03:00 bananapi kernel: [ 2956.569074] mt7921u 2-1.3:1.0: vendor request req:63 off:8168 failed:-110
2025-04-06T15:45:24.354027+03:00 bananapi kernel: [ 2960.086412] mt7921u 2-1.3:1.0: vendor request req:63 off:816c failed:-110
2025-04-06T15:45:27.874083+03:00 bananapi kernel: [ 2963.606504] mt7921u 2-1.3:1.0: vendor request req:63 off:811c failed:-110
2025-04-06T15:45:31.393881+03:00 bananapi kernel: [ 2967.129630] mt7921u 2-1.3:1.0: vendor request req:63 off:8178 failed:-110
2025-04-06T15:45:34.913935+03:00 bananapi kernel: [ 2970.649954] mt7921u 2-1.3:1.0: vendor request req:63 off:8250 failed:-110
2025-04-06T15:45:38.433913+03:00 bananapi kernel: [ 2974.170056] mt7921u 2-1.3:1.0: vendor request req:63 off:8254 failed:-110
2025-04-06T15:45:41.958087+03:00 bananapi kernel: [ 2977.691331] mt7921u 2-1.3:1.0: vendor request req:63 off:8258 failed:-110
2025-04-06T15:45:45.473881+03:00 bananapi kernel: [ 2981.207579] mt7921u 2-1.3:1.0: vendor request req:63 off:825c failed:-110
2025-04-06T15:45:48.994002+03:00 bananapi kernel: [ 2984.727602] mt7921u 2-1.3:1.0: vendor request req:63 off:8260 failed:-110
2025-04-06T15:45:52.513934+03:00 bananapi kernel: [ 2988.251432] mt7921u 2-1.3:1.0: vendor request req:63 off:8264 failed:-110
2025-04-06T15:45:56.034061+03:00 bananapi kernel: [ 2991.768094] mt7921u 2-1.3:1.0: vendor request req:63 off:8268 failed:-110
2025-04-06T15:45:59.553873+03:00 bananapi kernel: [ 2995.288191] mt7921u 2-1.3:1.0: vendor request req:63 off:826c failed:-110
2025-04-06T15:46:03.073877+03:00 bananapi kernel: [ 2998.808395] mt7921u 2-1.3:1.0: vendor request req:63 off:821c failed:-110
2025-04-06T15:46:06.593864+03:00 bananapi kernel: [ 3002.331682] mt7921u 2-1.3:1.0: vendor request req:63 off:8278 failed:-110
2025-04-06T15:46:10.114375+03:00 bananapi kernel: [ 3005.848883] mt7921u 2-1.3:1.0: vendor request req:63 off:8550 failed:-110
2025-04-06T15:46:13.633874+03:00 bananapi kernel: [ 3009.372075] mt7921u 2-1.3:1.0: vendor request req:63 off:8554 failed:-110
2025-04-06T15:46:17.158041+03:00 bananapi kernel: [ 3012.893351] mt7921u 2-1.3:1.0: vendor request req:63 off:8558 failed:-110
2025-04-06T15:46:17.283483+03:00 bananapi kernel: [ 3013.017735] ------------[ cut here ]------------
2025-04-06T15:46:17.283631+03:00 bananapi kernel: [ 3013.017793] WARNING: CPU: 0 PID: 13040 at net/wireless/util.c:1521 cfg80211_calculate_bitrate_he+0x1cb/0x258 [cfg80211]
2025-04-06T15:46:17.283656+03:00 bananapi kernel: [ 3013.018398] Modules linked in: aes_arm_bs crypto_simd aes_arm ccm nft_chain_nat xt_MASQUERADE nf_nat nft_compat mt7921u mt792x_usb mt7921_common mt792x_lib mt76_connac_lib mt76_usb mt76 mac80211 libarc4 lima gpu_sched sunxi_cir sun4i_gpadc_iio axp20x_adc sunxi_cedrus(C) sun4i_ts v4l2_mem2mem videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 cfg80211 videobuf2_common videodev mc rfkill drm_shmem_helper display_connector simplefb cpufreq_dt evdev uio_pdrv_genirq uio zram zsmalloc binfmt_misc dm_mod autofs4 ext4 mbcache jbd2 axp20x_usb_power industrialio pinctrl_axp209 sun4i_gpadc sunxi phy_generic realtek
2025-04-06T15:46:17.283670+03:00 bananapi kernel: [ 3013.018776] CPU: 0 UID: 0 PID: 13040 Comm: hostapd Tainted: G         C         6.13.7-edge-sunxi #1
2025-04-06T15:46:17.283682+03:00 bananapi kernel: [ 3013.018795] Tainted: [C]=CRAP
2025-04-06T15:46:17.283690+03:00 bananapi kernel: [ 3013.018800] Hardware name: Allwinner sun7i (A20) Family
2025-04-06T15:46:17.283698+03:00 bananapi kernel: [ 3013.018807] Call trace: 
2025-04-06T15:46:17.283707+03:00 bananapi kernel: [ 3013.018825]  unwind_backtrace from show_stack+0x11/0x14
2025-04-06T15:46:17.283717+03:00 bananapi kernel: [ 3013.018865]  show_stack from dump_stack_lvl+0x35/0x40
2025-04-06T15:46:17.283726+03:00 bananapi kernel: [ 3013.018906]  dump_stack_lvl from __warn+0xbd/0xe8
2025-04-06T15:46:17.283734+03:00 bananapi kernel: [ 3013.018933]  __warn from warn_slowpath_fmt+0xfb/0x104
2025-04-06T15:46:17.283743+03:00 bananapi kernel: [ 3013.018961]  warn_slowpath_fmt from cfg80211_calculate_bitrate_he+0x1cb/0x258 [cfg80211]
2025-04-06T15:46:17.283752+03:00 bananapi kernel: [ 3013.019485]  cfg80211_calculate_bitrate_he [cfg80211] from nl80211_put_sta_rate+0x39/0x2e0 [cfg80211]
2025-04-06T15:46:17.283762+03:00 bananapi kernel: [ 3013.020155]  nl80211_put_sta_rate [cfg80211] from nl80211_send_station+0x483/0xa7c [cfg80211]
2025-04-06T15:46:17.283779+03:00 bananapi kernel: [ 3013.020831]  nl80211_send_station [cfg80211] from nl80211_get_station+0xc5/0x140 [cfg80211]
2025-04-06T15:46:17.283798+03:00 bananapi kernel: [ 3013.021442]  nl80211_get_station [cfg80211] from genl_family_rcv_msg_doit+0x83/0xb4
2025-04-06T15:46:17.283811+03:00 bananapi kernel: [ 3013.021816]  genl_family_rcv_msg_doit from genl_rcv_msg+0x165/0x238
2025-04-06T15:46:17.283827+03:00 bananapi kernel: [ 3013.021839]  genl_rcv_msg from netlink_rcv_skb+0x75/0xb0
2025-04-06T15:46:17.283844+03:00 bananapi kernel: [ 3013.021858]  netlink_rcv_skb from genl_rcv+0x21/0x30
2025-04-06T15:46:17.283857+03:00 bananapi kernel: [ 3013.021876]  genl_rcv from netlink_unicast+0x1c5/0x20c
2025-04-06T15:46:17.283866+03:00 bananapi kernel: [ 3013.021892]  netlink_unicast from netlink_sendmsg+0x14b/0x2f4
2025-04-06T15:46:17.283874+03:00 bananapi kernel: [ 3013.021909]  netlink_sendmsg from __sock_sendmsg+0x27/0x48
2025-04-06T15:46:17.283883+03:00 bananapi kernel: [ 3013.021932]  __sock_sendmsg from ____sys_sendmsg+0x181/0x21c
2025-04-06T15:46:17.283892+03:00 bananapi kernel: [ 3013.021954]  ____sys_sendmsg from ___sys_sendmsg+0x47/0x6c
2025-04-06T15:46:17.283900+03:00 bananapi kernel: [ 3013.021980]  ___sys_sendmsg from __sys_sendmsg+0x47/0x7c
2025-04-06T15:46:17.283911+03:00 bananapi kernel: [ 3013.022006]  __sys_sendmsg from ret_fast_syscall+0x1/0x5c
2025-04-06T15:46:17.283932+03:00 bananapi kernel: [ 3013.022028] Exception stack(0xf1b91fa8 to 0xf1b91ff0)
2025-04-06T15:46:17.283946+03:00 bananapi kernel: [ 3013.022043] 1fa0:                   01cfbcf8 01cc6d88 00000004 be9e2e2c 00000000 00000001
2025-04-06T15:46:17.283957+03:00 bananapi kernel: [ 3013.022057] 1fc0: 01cfbcf8 01cc6d88 01cc6e00 00000128 be9e2e2c 00000004 be9e2eb0 00000000
2025-04-06T15:46:17.283966+03:00 bananapi kernel: [ 3013.022066] 1fe0: 00000128 be9e2de0 b6b29ecb b6a92656
2025-04-06T15:46:17.283981+03:00 bananapi kernel: [ 3013.022448] ---[ end trace 0000000000000000 ]---
2025-04-06T15:46:20.673913+03:00 bananapi kernel: [ 3016.412513] mt7921u 2-1.3:1.0: vendor request req:63 off:855c failed:-110
2025-04-06T15:46:24.194018+03:00 bananapi kernel: [ 3019.929702] mt7921u 2-1.3:1.0: vendor request req:63 off:8560 failed:-110
2025-04-06T15:46:27.713897+03:00 bananapi kernel: [ 3023.451474] mt7921u 2-1.3:1.0: vendor request req:63 off:8564 failed:-110
2025-04-06T15:46:31.234160+03:00 bananapi kernel: [ 3026.970275] mt7921u 2-1.3:1.0: vendor request req:63 off:8568 failed:-110
2025-04-06T15:46:34.753882+03:00 bananapi kernel: [ 3030.493263] mt7921u 2-1.3:1.0: vendor request req:63 off:856c failed:-110
2025-04-06T15:46:38.274077+03:00 bananapi kernel: [ 3034.010444] mt7921u 2-1.3:1.0: vendor request req:63 off:851c failed:-110
2025-04-06T15:46:41.793972+03:00 bananapi kernel: [ 3037.533788] mt7921u 2-1.3:1.0: vendor request req:63 off:8578 failed:-110
2025-04-06T15:46:45.313983+03:00 bananapi kernel: [ 3041.050868] mt7921u 2-1.3:1.0: vendor request req:63 off:8650 failed:-110
2025-04-06T15:46:48.833880+03:00 bananapi kernel: [ 3044.570955] mt7921u 2-1.3:1.0: vendor request req:63 off:8654 failed:-110
2025-04-06T15:46:52.354007+03:00 bananapi kernel: [ 3048.091334] mt7921u 2-1.3:1.0: vendor request req:63 off:8658 failed:-110
2025-04-06T15:46:55.873901+03:00 bananapi kernel: [ 3051.611348] mt7921u 2-1.3:1.0: vendor request req:63 off:865c failed:-110
2025-04-06T15:46:59.394026+03:00 bananapi kernel: [ 3055.131690] mt7921u 2-1.3:1.0: vendor request req:63 off:8660 failed:-110
2025-04-06T15:47:02.913879+03:00 bananapi kernel: [ 3058.654880] mt7921u 2-1.3:1.0: vendor request req:63 off:8664 failed:-110
2025-04-06T15:47:06.434145+03:00 bananapi kernel: [ 3062.172232] mt7921u 2-1.3:1.0: vendor request req:63 off:8668 failed:-110
2025-04-06T15:47:09.953908+03:00 bananapi kernel: [ 3065.695261] mt7921u 2-1.3:1.0: vendor request req:63 off:866c failed:-110
2025-04-06T15:47:13.474143+03:00 bananapi kernel: [ 3069.212486] mt7921u 2-1.3:1.0: vendor request req:63 off:861c failed:-110
2025-04-06T15:47:16.993865+03:00 bananapi kernel: [ 3072.735728] mt7921u 2-1.3:1.0: vendor request req:63 off:8678 failed:-110
2025-04-06T15:47:20.514076+03:00 bananapi kernel: [ 3076.252836] mt7921u 2-1.3:1.0: vendor request req:63 off:d02c failed:-110
2025-04-06T15:47:24.033898+03:00 bananapi kernel: [ 3079.776050] mt7921u 2-1.3:1.0: vendor request req:63 off:d054 failed:-110
2025-04-06T15:47:27.586040+03:00 bananapi kernel: [ 3083.325245] mt7921u 2-1.3:1.0: vendor request req:63 off:d058 failed:-110

[morrownr]

I don't have any experience with the bananapi distro. I know there were issues in and around kernel 6.13.6. If you have the options to use something like kernel 6.12.12, give that a try.

[M-y]

Armbian is a Debian based distro. It has a build script. This tool fetches Linux kernel from git repository and builds the sd card image for my banana pi device. Also I can select a specific version and add my own patches to kernel. So I built kernel 6.12.12 with this build tool and tested, these vendor request errors are appearing.

Apr 08 00:29:54 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8260 failed:-110
Apr 08 00:29:57 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8264 failed:-110
Apr 08 00:30:01 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8268 failed:-110
Apr 08 00:30:04 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:826c failed:-110
Apr 08 00:30:08 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:821c failed:-110
Apr 08 00:30:12 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8278 failed:-110

Also they provide pre built linux images, I can install them using apt. Here are the packages for my device:

| Package Name                          | Kernel Version |
|--------------------------------------|----------------|
| linux-image-legacy-sunxi=25.2.3      | v6.1.104       |
| linux-image-legacy-sunxi=25.2.2      | v6.1.104       |
| linux-image-legacy-sunxi=24.11.1     | v6.1.104       |
| linux-image-legacy-sunxi=24.8.2      | v6.1.104       |
| linux-image-legacy-sunxi=24.5.1      | v6.1.92        |
| linux-image-legacy-sunxi=24.2.1      | v6.1.77        |
| linux-image-current-sunxi=25.2.3     | v6.6.75        |
| linux-image-current-sunxi=25.2.2     | v6.6.75        |
| linux-image-current-sunxi=24.11.1    | v6.6.62        |
| linux-image-current-sunxi=24.8.2     | v6.6.44        |
| linux-image-current-sunxi=24.5.1     | v6.6.31        |
| linux-image-current-sunxi=24.2.1     | v6.6.16        |
| linux-image-edge-sunxi=25.2.3        | v6.13.7        |
| linux-image-edge-sunxi=25.2.2        | v6.12.16       |
| linux-image-edge-sunxi=24.11.1       | v6.11.9        |
| linux-image-edge-sunxi=24.8.3        | v6.10.9        |
| linux-image-edge-sunxi=24.5.1        | v6.7.12        |
| linux-image-edge-sunxi=24.2.1        | v6.7.4         |

I have installed and tested v6.6.75 and v6.12.16. In these kernel versions I see same vender request errors.
Any ideas?

[morrownr]

I'd say that this is not a driver issue. I am not seeing this here so I did a little looking around.

Let's look at the firmware version and hostapd version:

$ ethtool -i interface name

$ hostapd --version

[M-y]

OK, I was in 6..6

$ uname -a
Linux bananapi 6.6.75-current-sunxi #1 SMP Sat Feb  1 17:37:57 UTC 2025 armv7l GNU/Linux

$ ethtool -i wlxe84e06afb8f1 
driver: mt7921u
version: 6.6.75-current-sunxi
firmware-version: ____010000-20241106151045
expansion-rom-version: 
bus-info: 2-1:1.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no

$ hostapd -v
hostapd v2.10
User space daemon for IEEE 802.11 AP management,
IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator
Copyright (c) 2002-2022, Jouni Malinen <j@w1.fi> and contributors

[morrownr]

OK, I was in 6..6

Firmware and apps are part of the distro and do not change when kernel is changed.

firmware-version: ____010000-20241106151045

That is the most up to date firmware available for the mt7921u driver.

hostapd v2.10

This is not the latest release. Based on my research, I'd say getting hostapd up to date is likely the issue. I'm running hostapd v2.11 here and am not seeing your problem. If a packaged update is not available, I have a guide to compiling hostapd if you are interested. It is easy.

[M-y]

In what platform are you running hostapd?

I compiled the hostapd.

$ hostapd -v
hostapd v2.12-devel-hostap_2_11-806-gfe5b88e78
User space daemon for IEEE 802.11 AP management,
IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator
Copyright (c) 2002-2024, Jouni Malinen <j@w1.fi> and contributors

In first try it looks like restarted the driver with a

timed out waiting for pending tx

and when I see this I restarted hostapd and vendor request errors came again. This time hostapd became unresponsive, I can't restart it.

Apr 08 22:25:48 bananapi kernel: mt7921u 3-1:1.0: Message 00020003 (seq 5) timeout
Apr 08 22:25:49 bananapi kernel: mt7921u 3-1:1.0: timed out waiting for pending tx
Apr 08 22:25:50 bananapi kernel: ------------[ cut here ]------------
Apr 08 22:25:50 bananapi kernel: WARNING: CPU: 1 PID: 25393 at kernel/kthread.c:661 kthread_park+0xad/0xdc
Apr 08 22:25:50 bananapi kernel: Modules linked in: aes_arm_bs crypto_simd ccm nft_chain_nat xt_MASQUERADE nf_nat nft_compat mt7921u mt792x_usb mt7921_common mt792x_lib mt76_connac_lib mt76_usb mt76 mac80211 libarc4 lima gpu_sched sunxi_cedrus(C) sun4i_gpadc_iio v4l2_mem2mem videobuf2_dma_contig axp20x_adc sunxi_cir videobuf2_memops videobuf2_v4l2 sun4i_ts videodev videobuf2_common lz4hc lz4 mc cfg80211 display_connector drm_shmem_helper simplefb cpufreq_dt rfkill evdev zram zsmalloc uio_pdrv_genirq uio binfmt_misc dm_mod autofs4 ext4 mbcache jbd2 axp20x_usb_power industrialio pinctrl_axp209 sun4i_gpadc sunxi phy_generic realtek
Apr 08 22:25:50 bananapi kernel: CPU: 1 PID: 25393 Comm: kworker/u4:3 Tainted: G         C         6.6.75-current-sunxi #1
Apr 08 22:25:50 bananapi kernel: Hardware name: Allwinner sun7i (A20) Family
Apr 08 22:25:50 bananapi kernel: Workqueue: mt76 mt7921_mac_reset_work [mt7921_common]
Apr 08 22:25:50 bananapi kernel:  unwind_backtrace from show_stack+0x11/0x14
Apr 08 22:25:50 bananapi kernel:  show_stack from dump_stack_lvl+0x2b/0x34
Apr 08 22:25:50 bananapi kernel:  dump_stack_lvl from __warn+0xb5/0xe0
Apr 08 22:25:50 bananapi kernel:  __warn from warn_slowpath_fmt+0xfb/0x104
Apr 08 22:25:50 bananapi kernel:  warn_slowpath_fmt from kthread_park+0xad/0xdc
Apr 08 22:25:50 bananapi kernel:  kthread_park from mt76u_stop_tx+0x1a9/0x1f8 [mt76_usb]
Apr 08 22:25:50 bananapi kernel:  mt76u_stop_tx [mt76_usb] from mt7921u_mac_reset+0x5b/0x138 [mt7921u]
Apr 08 22:25:50 bananapi kernel:  mt7921u_mac_reset [mt7921u] from mt7921_mac_reset_work+0x93/0x168 [mt7921_common]
Apr 08 22:25:50 bananapi kernel:  mt7921_mac_reset_work [mt7921_common] from process_one_work+0x11b/0x2d0
Apr 08 22:25:50 bananapi kernel:  process_one_work from worker_thread+0x21f/0x358
Apr 08 22:25:50 bananapi kernel:  worker_thread from kthread+0xbf/0xd4
Apr 08 22:25:50 bananapi kernel:  kthread from ret_from_fork+0x11/0x1c
Apr 08 22:25:50 bananapi kernel: Exception stack(0xf1d91fb0 to 0xf1d91ff8)
Apr 08 22:25:50 bananapi kernel: 1fa0:                                     00000000 00000000 00000000 00000000
Apr 08 22:25:50 bananapi kernel: 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Apr 08 22:25:50 bananapi kernel: 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
Apr 08 22:25:50 bananapi kernel: ---[ end trace 0000000000000000 ]---
Apr 08 22:25:50 bananapi kernel: mt7921u 3-1:1.0: HW/SW Version: 0x8a108a10, Build Time: 20241106151007a
Apr 08 22:25:50 bananapi kernel: mt7921u 3-1:1.0: WM Firmware Version: ____010000, Build Time: 20241106151045

######### I killed and restarted hostapd here #######

Apr 08 22:26:41 bananapi systemd-networkd[241]: wlxe84e06afb8f1: Lost carrier               
Apr 08 22:26:41 bananapi systemd-networkd[241]: wlxe84e06afb8f1: DHCPv6 lease lost          
Apr 08 22:26:41 bananapi systemd-networkd[241]: wlxe84e06afb8f1: Link DOWN                  
Apr 08 22:26:41 bananapi systemd-networkd[241]: wlxe84e06afb8f1: Link UP                    
Apr 08 22:26:44 bananapi systemd-networkd[241]: wlxe84e06afb8f1: Link DOWN                  
Apr 08 22:26:44 bananapi systemd-networkd[241]: wlxe84e06afb8f1: Link UP                    
Apr 08 22:26:50 bananapi systemd-networkd[241]: wlxe84e06afb8f1: Gained carrier             
Apr 08 22:26:52 bananapi systemd-networkd[241]: wlxe84e06afb8f1: Gained IPv6LL
Apr 08 22:27:15 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8150 failed:-110
Apr 08 22:27:19 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8154 failed:-110
Apr 08 22:27:22 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8158 failed:-110
Apr 08 22:27:26 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:815c failed:-110
Apr 08 22:27:29 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8160 failed:-110
Apr 08 22:27:33 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8164 failed:-110
Apr 08 22:27:37 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8168 failed:-110
Apr 08 22:27:40 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:816c failed:-110
Apr 08 22:27:44 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:811c failed:-110
Apr 08 22:27:47 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8178 failed:-110
Apr 08 22:27:51 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8250 failed:-110
Apr 08 22:27:54 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8254 failed:-110
Apr 08 22:27:58 bananapi kernel: mt7921u 3-1:1.0: vendor request req:63 off:8258 failed:-110

[morrownr]

In what platform are you running hostapd?

RasPiOS 64 bit, kernel 6.6 which is what it ships with. hostapd 2.11 which it also ships with.

Did you check the hostapd ,config to make sure everything you need is active?

A lot of people that stop by here have APs based on hostapd and adapters with mt7921 chips. I'm not seeing any reports similar to this. Is your hardware 64 bit capable? Do you have options for the distro that you use?

[M-y]

Did you check the hostapd ,config to make sure everything you need is active?

hostapd config is same all of the time, it is in my first message.

Is your hardware 64 bit capable? Do you have options for the distro that you use?

No, this is not an arm64 device. This is 32 bit. You can check the device in here: https://wiki.banana-pi.org/Banana_Pi_BPI-M1
This page also shows a variety of distros. I can test anyone. Vanilla Debian? Openwrt?

[morrownr]

hostapd config is same all of the time, it is in my first message.

I am not talking about hostapd.conf that is used to set runtime configuration. I am talking about .config that is used to set compile time configuration. Let me paste my hostapd compile guide at the end of the message.

I can test anyone. Vanilla Debian? Openwrt?

Vanilla Debian is too old at this point. OpenWRT might be the best option since Mediatek devs spend time at OpenWRT. Is 24.10 available? If it is, give it a try. Do you know how to install the mt7921u driver?

[morrownr]

Here is my How to Compile hostapd Guide. I have not needed to use it for about a year so I might need to look at the recommendations for .config active lines but it should work for a WiFi 6e adapter.

2024-05-05 (cinco de mayo)

Compile Latest hostapd

Purpose: If you need the very latest capabilities, you may need to
compile hostapd.

This guide was tested on a Raspberry Pi 4B using Raspberry Pi OS.

Install hostapd (if not already installed):

$ sudo apt install hostapd

Activate hostapd (if not already activated):

$ sudo systemctl unmask hostapd
$ sudo systemctl enable hostapd

Install git (if not already installed):

$ sudo apt install git

Clone hostapd:

Note: I use a directory call `src` in my home directory.

$ mkdir -p ~/src

Move to `src` directory:

$ cd ~/src

Download hostap source:

$ git clone git://w1.fi/srv/git/hostap.git

Move to hostapd directory:

$ cd hostap/hostapd

Copy default settings to .config:

$ cp defconfig .config

Edit .config:

$ nano .config
or
$ geany .config
or
use your favorite Linux text editor

Activate the appropriate lines: (uncomment, if not already uncommented)

Note: * means that the entry was commented out in the default .config.

CONFIG_DRIVER_HOSTAP=y
CONFIG_DRIVER_NL80211=y
CONFIG_LIBNL32=y
CONFIG_RSN_PREAUTH=y
CONFIG_OCV=y
CONFIG_EAP=y
CONFIG_ERP=y
CONFIG_EAP_MD5=y
CONFIG_EAP_TLS=y
CONFIG_EAP_MSCHAPV2=y
CONFIG_EAP_PEAP=y
CONFIG_EAP_GTC=y
CONFIG_EAP_TTLS=y
CONFIG_IPV6=y
CONFIG_IEEE80211R=y
CONFIG_WNM=y
CONFIG_IEEE80211AC=y
CONFIG_IEEE80211AX=y
CONFIG_IEEE80211BE=y
CONFIG_SAE=y
CONFIG_SAE_PK=y
CONFIG_NO_RANDOM_POOL=y
CONFIG_GETRANDOM=y
CONFIG_ELOOP_EPOLL=y
CONFIG_ACS=y
CONFIG_MBO=y
CONFIG_NO_TKIP=y

Save the file

Get and install dependencies

$ apt show hostapd

Pre-Depends: init-system-helpers (>= 1.54~)
Depends: libc6 (>= 2.34), libnl-3-200 (>= 3.2.7), libnl-genl-3-200 (>= 3.2.7), libnl-route-3-200 (>= 3.2.7), libssl3 (>= 3.0.0~~alpha1), lsb-base

Note: Some of the below packages may already be installed.

$ sudo apt install -y build-essential init-system-helpers libc6 lsb-base

$ sudo apt install -y libnl-3-200 libnl-genl-3-200 libnl-route-3-200

$ sudo apt install -y libnl-3-dev libnl-genl-3-dev libssl-dev

Compile hostapd:

$ make

Copy hostapd executable over installed executable:

$ sudo cp hostapd_cli /usr/sbin/hostapd_cli

$ sudo systemctl disable hostapd

$ sudo reboot

$ cd ~/src/hostap/hostapd

$ sudo cp hostapd /usr/sbin/hostapd

$ sudo systemctl enable hostapd

$ sudo reboot

Check:

$ hostapd -v

-----

[M-y]

I was used the .config from your guide here. But looks like your above comment is a bit different. These are the differences:

CONFIG_OCV=y
CONFIG_IEEE80211BE=y
CONFIG_MBO=y

[M-y]

Vanilla Debian is too old at this point. OpenWRT might be the best option since Mediatek devs spend time at OpenWRT. Is 24.10 available? If it is, give it a try. Do you know how to install the mt7921u driver?

Looks like there is a banana pi page. I am investigating OpenWRT now. If you have any information about installing mt7921u driver I would appreciate.